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GNU GENERAL PUBLIC LICENSE
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
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state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
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the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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You should have received a copy of the GNU General Public License
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
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<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# City Limits
[![Donate](https://img.shields.io/liberapay/receives/rocketnine.space.svg?logo=liberapay)](https://liberapay.com/rocketnine.space)
[City-building simulation](https://en.wikipedia.org/wiki/City-building_game) video game
This game was created for the [Wasted Resources Game Jam](https://itch.io/jam/wastedresources).
## Play
### Browser
[**Play in your browser**](https://rocketnine.itch.io/citylimits?secret=citylimits)
### Compile
**Note:** You will need to install the dependencies listed for [your platform](https://github.com/hajimehoshi/ebiten/blob/main/README.md#platforms).
Run the following command to build a `citylimits` executable:
`go install code.rocketnine.space/tslocum/citylimits@latest`
Run `~/go/bin/citylimits` to play.
## Support
Please share issues and suggestions [here](https://code.rocketnine.space/tslocum/citylimits/issues).
## Credits
- [Trevor Slocum](https://rocketnine.space) - Game design and programming
- [node punk](https://open.spotify.com/artist/15eFpWQPNRxB89PnFNWvjU?si=z-jfVwYHTxugaC-BGZiyNg) - Music
## Dependencies
- [ebiten](https://github.com/hajimehoshi/ebiten) - Game engine
- [gohan](https://code.rocketnine.space/tslocum/gohan) - Entity Component System framework

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asset/asset.go Normal file
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package asset
import (
"bytes"
"embed"
"image"
"image/color"
_ "image/png"
"io"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/audio"
"github.com/hajimehoshi/ebiten/v2/audio/vorbis"
"github.com/hajimehoshi/ebiten/v2/audio/wav"
)
const sampleRate = 44100
//go:embed image map
var FS embed.FS
var ImgWhiteSquare = ebiten.NewImage(8, 8)
var ImgBlackSquare = ebiten.NewImage(8, 8)
func init() {
ImgWhiteSquare.Fill(color.White)
ImgBlackSquare.Fill(color.Black)
}
func LoadSounds(ctx *audio.Context) {
// TODO
}
func LoadImage(p string) *ebiten.Image {
f, err := FS.Open(p)
if err != nil {
panic(err)
}
defer f.Close()
baseImg, _, err := image.Decode(f)
if err != nil {
panic(err)
}
return ebiten.NewImageFromImage(baseImg)
}
func LoadBytes(p string) []byte {
b, err := FS.ReadFile(p)
if err != nil {
panic(err)
}
return b
}
func LoadWAV(context *audio.Context, p string) *audio.Player {
f, err := FS.Open(p)
if err != nil {
panic(err)
}
defer f.Close()
stream, err := wav.DecodeWithSampleRate(sampleRate, f)
if err != nil {
panic(err)
}
player, err := context.NewPlayer(stream)
if err != nil {
panic(err)
}
// Workaround to prevent delays when playing for the first time.
player.SetVolume(0)
player.Play()
player.Pause()
player.Rewind()
player.SetVolume(1)
return player
}
func LoadOGG(context *audio.Context, p string, loop bool) *audio.Player {
b := LoadBytes(p)
stream, err := vorbis.DecodeWithSampleRate(sampleRate, bytes.NewReader(b))
if err != nil {
panic(err)
}
var s io.Reader
if loop {
s = audio.NewInfiniteLoop(stream, stream.Length())
} else {
s = stream
}
player, err := context.NewPlayer(s)
if err != nil {
panic(err)
}
// Workaround to prevent delays when playing for the first time.
player.SetVolume(0)
player.Play()
player.Pause()
player.Rewind()
player.SetVolume(1)
return player
}

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This tileset was created by Mrmo Tarius.
https://mrmotarius.itch.io/mrmo-brik

BIN
asset/image/tileset/MRMO_BRIK.png Normal file
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Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 13 MiB

4
asset/image/tileset/MRMO_BRIK.tsx Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<tileset version="1.5" tiledversion="1.7.2" name="MRMO_BRIK" tilewidth="128" tileheight="144" tilecount="1440" columns="32">
<image source="MRMO_BRIK.png" width="4096" height="2880"/>
</tileset>

24
asset/map/house1.tmx Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<map version="1.5" tiledversion="1.7.2" orientation="isometric" renderorder="right-down" width="6" height="6" tilewidth="128" tileheight="64" infinite="0" nextlayerid="4" nextobjectid="1">
<tileset firstgid="1" source="../image/tileset/MRMO_BRIK.tsx"/>
<layer id="1" name="1" width="6" height="6">
<data encoding="csv">
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,0,161,161,161,
0,0,0,161,161,161,
0,0,0,161,529,161
</data>
</layer>
<layer id="2" name="2" width="6" height="6" offsetx="0" offsety="-80">
<data encoding="csv">
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,0,375,375,375,
0,0,0,372,372,372,
0,0,0,375,375,375
</data>
</layer>
</map>

44
asset/map/park_large.tmx Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<map version="1.5" tiledversion="1.7.2" orientation="isometric" renderorder="right-down" width="6" height="6" tilewidth="128" tileheight="64" infinite="0" nextlayerid="7" nextobjectid="1">
<tileset firstgid="1" source="../image/tileset/MRMO_BRIK.tsx"/>
<layer id="1" name="1" width="6" height="6">
<data encoding="csv">
0,0,0,0,0,0,
0,353,380,380,380,353,
0,380,530,629,530,380,
0,380,531,0,531,380,
0,380,530,0,530,380,
0,0,0,0,0,0
</data>
</layer>
<layer id="2" name="2" width="6" height="6" offsetx="0" offsety="-40">
<data encoding="csv">
0,0,0,0,0,0,
0,0,0,0,0,0,
0,384,0,0,0,0,
0,384,0,0,0,0,
0,384,0,0,0,0,
0,0,0,0,0,284
</data>
</layer>
<layer id="4" name="1.5" width="6" height="6">
<data encoding="csv">
0,0,0,0,0,0,
0,0,0,0,0,353,
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,0,0,0,0,
0,353,380,0,380,353
</data>
</layer>
<layer id="5" name="2.5" width="6" height="6" offsetx="0" offsety="-40">
<data encoding="csv">
0,0,0,0,0,0,
0,0,384,384,384,0,
0,0,0,0,0,384,
0,0,0,0,0,384,
0,0,0,0,0,384,
0,0,384,0,0,0
</data>
</layer>
</map>

24
asset/map/policestation.tmx Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<map version="1.5" tiledversion="1.7.2" orientation="isometric" renderorder="right-down" width="6" height="6" tilewidth="128" tileheight="64" infinite="0" nextlayerid="4" nextobjectid="1">
<tileset firstgid="1" source="../image/tileset/MRMO_BRIK.tsx"/>
<layer id="1" name="1" width="6" height="6">
<data encoding="csv">
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,67,67,67,67,
0,0,67,67,67,67,
0,0,67,67,67,67,
0,0,67,67,527,67
</data>
</layer>
<layer id="2" name="2" width="6" height="6" offsetx="0" offsety="-80">
<data encoding="csv">
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,504,0,0,504,
0,0,0,444,444,0,
0,0,0,444,444,0,
0,0,504,0,0,504
</data>
</layer>
</map>

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{
"automappingRulesFile": "",
"commands": [
],
"extensionsPath": "extensions",
"folders": [
"asset"
],
"objectTypesFile": ""
}

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component/actor.go Normal file
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package component
import (
"math/rand"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
type ActorComponent struct {
Type int
Active bool
Health int
FireAmount int
FireRate int // In ticks
FireTicks int //Ticks until next action
Movement int
Movements [][3]float64 // X, Y, pre-delay in ticks
MovementTicks int // Ticks until next action
DamageTicks int
Rand *rand.Rand
}
const (
CreepSnowblower = iota + 1
CreepSmallRock
CreepMediumRock
CreepLargeRock
)
var ActorComponentID = ECS.NewComponentID()
func (p *ActorComponent) ComponentID() gohan.ComponentID {
return ActorComponentID
}
func Creep(ctx *gohan.Context) *ActorComponent {
c, ok := ctx.Component(ActorComponentID).(*ActorComponent)
if !ok {
return nil
}
return c
}

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package component
import (
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
type CreepBulletComponent struct {
Invulnerable bool // Invulnerable to hazards
}
var CreepBulletComponentID = ECS.NewComponentID()
func (p *CreepBulletComponent) ComponentID() gohan.ComponentID {
return CreepBulletComponentID
}
func CreepBullet(ctx *gohan.Context) *CreepBulletComponent {
c, ok := ctx.Component(CreepBulletComponentID).(*CreepBulletComponent)
if !ok {
return nil
}
return c
}

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package component
import (
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
type PlayerBulletComponent struct {
}
var PlayerBulletComponentID = ECS.NewComponentID()
func (p *PlayerBulletComponent) ComponentID() gohan.ComponentID {
return PlayerBulletComponentID
}
func PlayerBullet(ctx *gohan.Context) *PlayerBulletComponent {
c, ok := ctx.Component(PlayerBulletComponentID).(*PlayerBulletComponent)
if !ok {
return nil
}
return c
}

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component/position.go Normal file
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package component
import (
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
type PositionComponent struct {
X, Y float64
}
var PositionComponentID = ECS.NewComponentID()
func (p *PositionComponent) ComponentID() gohan.ComponentID {
return PositionComponentID
}
func Position(ctx *gohan.Context) *PositionComponent {
c, ok := ctx.Component(PositionComponentID).(*PositionComponent)
if !ok {
return nil
}
return c
}

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component/rail.go Normal file
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package component
import (
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
type RailComponent struct {
}
var RailComponentID = ECS.NewComponentID()
func (p *RailComponent) ComponentID() gohan.ComponentID {
return RailComponentID
}
func Rail(ctx *gohan.Context) *RailComponent {
c, ok := ctx.Component(RailComponentID).(*RailComponent)
if !ok {
return nil
}
return c
}

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package component
import (
"time"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
)
type SpriteComponent struct {
Image *ebiten.Image
HorizontalFlip bool
VerticalFlip bool
DiagonalFlip bool // TODO unimplemented
Angle float64
Overlay *ebiten.Image
OverlayX, OverlayY float64 // Overlay offset
Frame int
Frames []*ebiten.Image
FrameTime time.Duration
LastFrame time.Time
NumFrames int
DamageTicks int
OverrideColorScale bool
ColorScale float64
}
var SpriteComponentID = ECS.NewComponentID()
func (p *SpriteComponent) ComponentID() gohan.ComponentID {
return SpriteComponentID
}
func Sprite(ctx *gohan.Context) *SpriteComponent {
c, ok := ctx.Component(SpriteComponentID).(*SpriteComponent)
if !ok {
return nil
}
return c
}

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package component
import (
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
type VelocityComponent struct {
X, Y float64
}
var VelocityComponentID = ECS.NewComponentID()
func (c *VelocityComponent) ComponentID() gohan.ComponentID {
return VelocityComponentID
}
func Velocity(ctx *gohan.Context) *VelocityComponent {
c, ok := ctx.Component(VelocityComponentID).(*VelocityComponent)
if !ok {
return nil
}
return c
}

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package component
import (
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
type WeaponComponent struct {
Equipped bool
Damage int
// In ticks
FireRate int
NextFire int
BulletSpeed float64
}
var WeaponComponentID = ECS.NewComponentID()
func (p *WeaponComponent) ComponentID() gohan.ComponentID {
return WeaponComponentID
}
func Weapon(ctx *gohan.Context) *WeaponComponent {
c, ok := ctx.Component(WeaponComponentID).(*WeaponComponent)
if !ok {
return nil
}
return c
}

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package ecs
import "code.rocketnine.space/tslocum/gohan"
var ECS = gohan.NewWorld()

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package entity
import (
"code.rocketnine.space/tslocum/citylimits/asset"
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
func NewCreepBullet(x, y, xSpeed, ySpeed float64) gohan.Entity {
bullet := ECS.NewEntity()
ECS.AddComponent(bullet, &component.PositionComponent{
X: x,
Y: y,
})
ECS.AddComponent(bullet, &component.VelocityComponent{
X: xSpeed,
Y: ySpeed,
})
ECS.AddComponent(bullet, &component.SpriteComponent{
Image: asset.ImgWhiteSquare,
})
ECS.AddComponent(bullet, &component.CreepBulletComponent{})
return bullet
}

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package entity
import (
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
func NewPlayer() gohan.Entity {
player := ECS.NewEntity()
ECS.AddComponent(player, &component.PositionComponent{})
ECS.AddComponent(player, &component.VelocityComponent{})
weapon := &component.WeaponComponent{
Damage: 1,
FireRate: 144 / 16,
BulletSpeed: 8,
}
ECS.AddComponent(player, weapon)
return player
}

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entity/playerbullet.go Normal file
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package entity
import (
"code.rocketnine.space/tslocum/citylimits/asset"
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
)
func NewPlayerBullet(x, y, xSpeed, ySpeed float64) gohan.Entity {
bullet := ECS.NewEntity()
ECS.AddComponent(bullet, &component.PositionComponent{
X: x,
Y: y,
})
ECS.AddComponent(bullet, &component.VelocityComponent{
X: xSpeed,
Y: ySpeed,
})
ECS.AddComponent(bullet, &component.SpriteComponent{
Image: asset.ImgBlackSquare,
})
ECS.AddComponent(bullet, &component.PlayerBulletComponent{})
return bullet
}

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//go:build !js || !wasm
// +build !js !wasm
package main
import (
"flag"
"code.rocketnine.space/tslocum/citylimits/world"
"github.com/hajimehoshi/ebiten/v2"
)
func parseFlags() {
var (
fullscreen bool
noSplash bool
)
flag.BoolVar(&fullscreen, "fullscreen", false, "run in fullscreen mode")
flag.BoolVar(&world.World.NativeResolution, "native", false, "display at native resolution")
flag.BoolVar(&noSplash, "no-splash", false, "skip splash screen")
flag.IntVar(&world.World.Debug, "debug", 0, "print debug information")
flag.Parse()
if fullscreen {
ebiten.SetFullscreen(true)
}
if noSplash || world.World.Debug > 0 {
world.StartGame()
//world.World.MessageVisible = false
}
}

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flags_web.go Normal file
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//go:build js && wasm
// +build js,wasm
package main
import (
"code.rocketnine.space/tslocum/citylimits/world"
"github.com/hajimehoshi/ebiten/v2"
)
func parseFlags() {
world.World.DisableEsc = true
ebiten.SetFullscreen(true)
}

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package game
import (
"image/color"
"math/rand"
"os"
"sync"
"time"
"code.rocketnine.space/tslocum/citylimits/component"
"code.rocketnine.space/tslocum/citylimits/entity"
"code.rocketnine.space/tslocum/citylimits/asset"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/citylimits/system"
"code.rocketnine.space/tslocum/citylimits/world"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/audio"
)
const sampleRate = 44100
// game is an isometric demo game.
type game struct {
w, h int
audioContext *audio.Context
op *ebiten.DrawImageOptions
disableEsc bool
debugMode bool
cpuProfile *os.File
movementSystem *system.MovementSystem
renderSystem *system.RenderSystem
addedSystems bool
sync.Mutex
}
// NewGame returns a new isometric demo game.
func NewGame() (*game, error) {
g := &game{
audioContext: audio.NewContext(sampleRate),
op: &ebiten.DrawImageOptions{},
}
err := g.loadAssets()
if err != nil {
panic(err)
}
const numEntities = 30000
ECS.Preallocate(numEntities)
return g, nil
}
func (g *game) tileToGameCoords(x, y int) (float64, float64) {
return float64(x) * 32, float64(y) * 32
}
// Layout is called when the game's layout changes.
func (g *game) Layout(w, h int) (int, int) {
if w != g.w || h != g.h {
world.World.ScreenW, world.World.ScreenH = w, h
g.w, g.h = w, h
}
return g.w, g.h
}
func (g *game) Update() error {
if ebiten.IsWindowBeingClosed() {
g.Exit()
return nil
}
if world.World.ResetGame {
world.Reset()
world.BuildStructure(world.StructureHouse1, 0, 0)
world.BuildStructure(world.StructureHouse1, 8, 12)
world.BuildStructure(world.StructurePoliceStation, 12, 12)
// TODO
world.World.HoverStructure = world.StructurePoliceStation
if world.World.Player == 0 {
world.World.Player = entity.NewPlayer()
}
const playerStartOffset = 128
w := float64(world.World.Map.Width * world.World.Map.TileWidth)
h := float64(world.World.Map.Height * world.World.Map.TileHeight)
position := ECS.Component(world.World.Player, component.PositionComponentID).(*component.PositionComponent)
position.X, position.Y = w/2, h-playerStartOffset
if !g.addedSystems {
g.addSystems()
g.addedSystems = true // TODO
}
rand.Seed(time.Now().UnixNano())
world.World.ResetGame = false
world.World.GameOver = false
}
err := ECS.Update()
if err != nil {
return err
}
return nil
}
// renderSprite renders a sprite on the screen.
func (g *game) renderSprite(x float64, y float64, offsetx float64, offsety float64, angle float64, geoScale float64, colorScale float64, alpha float64, hFlip bool, vFlip bool, sprite *ebiten.Image, target *ebiten.Image) int {
if alpha < .01 || colorScale < .01 {
return 0
}
xi, yi := world.CartesianToIso(float64(x), float64(y))
padding := float64(world.TileSize) * world.World.CamScale
cx, cy := float64(world.World.ScreenW/2), float64(world.World.ScreenH/2)
// Skip drawing tiles that are out of the screen.
drawX, drawY := world.IsoToScreen(xi, yi)
if drawX+padding < 0 || drawY+padding < 0 || drawX > float64(world.World.ScreenW) || drawY > float64(world.World.ScreenH) {
//log.Println("SKIP", drawX, drawY, world.World.ScreenW, world.World.ScreenH)
return 0
}
g.op.GeoM.Reset()
/*if hFlip {
s.op.GeoM.Scale(-1, 1)
s.op.GeoM.Translate(TileWidth, 0)
}
if vFlip {
s.op.GeoM.Scale(1, -1)
s.op.GeoM.Translate(0, TileWidth)
}*/
// Move to current isometric position.
g.op.GeoM.Translate(xi, yi+offsety)
// Translate camera position.
g.op.GeoM.Translate(-world.World.CamX, -world.World.CamY)
// Zoom.
g.op.GeoM.Scale(world.World.CamScale, world.World.CamScale)
// Center.
g.op.GeoM.Translate(cx, cy)
target.DrawImage(sprite, g.op)
/*s.op.GeoM.Scale(geoScale, geoScale)
// Rotate
s.op.GeoM.Translate(offsetx, offsety)
s.op.GeoM.Rotate(angle)
// Move to current isometric position.
s.op.GeoM.Translate(x, y)
// Translate camera position.
s.op.GeoM.Translate(-world.World.CamX, -world.World.CamY)
// Zoom.
s.op.GeoM.Scale(s.camScale, s.camScale)
// Center.
//s.op.GeoM.Translate(float64(s.ScreenW/2.0), float64(s.ScreenH/2.0))
s.op.ColorM.Scale(colorScale, colorScale, colorScale, alpha)
target.DrawImage(sprite, s.op)
s.op.ColorM.Reset()*/
return 1
}
func (g *game) Draw(screen *ebiten.Image) {
// Handle background rendering separately to simplify design.
for i := range world.World.Level.Tiles {
for x := range world.World.Level.Tiles[i] {
for y, tile := range world.World.Level.Tiles[i][x] {
if tile == nil || tile.Sprite == nil {
continue
}
g.renderSprite(float64(x), float64(y), 0, float64(i*-80), 0, 1, 1, 1, false, false, tile.Sprite, screen)
}
}
}
err := ECS.Draw(screen)
if err != nil {
panic(err)
}
}
func (g *game) addSystems() {
ecs := ECS
g.movementSystem = system.NewMovementSystem()
ecs.AddSystem(system.NewPlayerMoveSystem(world.World.Player, g.movementSystem))
ecs.AddSystem(system.NewplayerFireSystem())
ecs.AddSystem(g.movementSystem)
ecs.AddSystem(system.NewCreepSystem())
ecs.AddSystem(system.NewCameraSystem())
g.renderSystem = system.NewRenderSystem()
ecs.AddSystem(g.renderSystem)
ecs.AddSystem(system.NewRenderMessageSystem())
ecs.AddSystem(system.NewRenderDebugTextSystem(world.World.Player))
ecs.AddSystem(system.NewProfileSystem(world.World.Player))
}
func (g *game) loadAssets() error {
asset.ImgWhiteSquare.Fill(color.White)
asset.LoadSounds(g.audioContext)
return nil
}
func (g *game) Exit() {
os.Exit(0)
}

22
go.mod Normal file
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@ -0,0 +1,22 @@
module code.rocketnine.space/tslocum/citylimits
go 1.17
require (
code.rocketnine.space/tslocum/gohan v0.0.0-20220106015515-0231e09ad78e
github.com/hajimehoshi/ebiten/v2 v2.2.3
github.com/lafriks/go-tiled v0.6.0
)
require (
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20211213063430-748e38ca8aec // indirect
github.com/hajimehoshi/oto/v2 v2.1.0-alpha.5 // indirect
github.com/jezek/xgb v0.0.0-20210312150743-0e0f116e1240 // indirect
github.com/jfreymuth/oggvorbis v1.0.3 // indirect
github.com/jfreymuth/vorbis v1.0.2 // indirect
golang.org/x/exp v0.0.0-20220104160115-025e73f80486 // indirect
golang.org/x/image v0.0.0-20211028202545-6944b10bf410 // indirect
golang.org/x/mobile v0.0.0-20220104184238-4a8be17bd2e3 // indirect
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
)

92
go.sum Normal file
View file

@ -0,0 +1,92 @@
code.rocketnine.space/tslocum/gohan v0.0.0-20220106015515-0231e09ad78e h1:n/4oueA0I1ilZpFGLlaCqaEDTX658fVQDtRkahdUDUI=
code.rocketnine.space/tslocum/gohan v0.0.0-20220106015515-0231e09ad78e/go.mod h1:nOvFBFvFPl5sDtkMy2Fn/7QZcWq5RE98/mK+INLqIWg=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20210727001814-0db043d8d5be/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20211213063430-748e38ca8aec h1:3FLiRYO6PlQFDpUU7OEFlWgjGD1jnBIVSJ5SYRWk+9c=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20211213063430-748e38ca8aec/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
github.com/hajimehoshi/bitmapfont/v2 v2.1.3/go.mod h1:2BnYrkTQGThpr/CY6LorYtt/zEPNzvE/ND69CRTaHMs=
github.com/hajimehoshi/ebiten/v2 v2.2.3 h1:jZUP3XWP6mXaw9SCrjWT5Pl6EPuz6FY737dZQgN1KJ4=
github.com/hajimehoshi/ebiten/v2 v2.2.3/go.mod h1:olKl/qqhMBBAm2oI7Zy292nCtE+nitlmYKNF3UpbFn0=
github.com/hajimehoshi/file2byteslice v0.0.0-20210813153925-5340248a8f41/go.mod h1:CqqAHp7Dk/AqQiwuhV1yT2334qbA/tFWQW0MD2dGqUE=
github.com/hajimehoshi/go-mp3 v0.3.2/go.mod h1:qMJj/CSDxx6CGHiZeCgbiq2DSUkbK0UbtXShQcnfyMM=
github.com/hajimehoshi/oto v0.6.1/go.mod h1:0QXGEkbuJRohbJaxr7ZQSxnju7hEhseiPx2hrh6raOI=
github.com/hajimehoshi/oto/v2 v2.1.0-alpha.2/go.mod h1:rUKQmwMkqmRxe+IAof9+tuYA2ofm8cAWXFmSfzDN8vQ=
github.com/hajimehoshi/oto/v2 v2.1.0-alpha.5 h1:AwLKf51fpOTVIBxgQUvNokmj/IaYMYsqJQBh6wif1c8=
github.com/hajimehoshi/oto/v2 v2.1.0-alpha.5/go.mod h1:rUKQmwMkqmRxe+IAof9+tuYA2ofm8cAWXFmSfzDN8vQ=
github.com/jakecoffman/cp v1.1.0/go.mod h1:JjY/Fp6d8E1CHnu74gWNnU0+b9VzEdUVPoJxg2PsTQg=
github.com/jezek/xgb v0.0.0-20210312150743-0e0f116e1240 h1:dy+DS31tGEGCsZzB45HmJJNHjur8GDgtRNX9U7HnSX4=
github.com/jezek/xgb v0.0.0-20210312150743-0e0f116e1240/go.mod h1:3P4UH/k22rXyHIJD2w4h2XMqPX4Of/eySEZq9L6wqc4=
github.com/jfreymuth/oggvorbis v1.0.3 h1:MLNGGyhOMiVcvea9Dp5+gbs2SAwqwQbtrWnonYa0M0Y=
github.com/jfreymuth/oggvorbis v1.0.3/go.mod h1:1U4pqWmghcoVsCJJ4fRBKv9peUJMBHixthRlBeD6uII=
github.com/jfreymuth/vorbis v1.0.2 h1:m1xH6+ZI4thH927pgKD8JOH4eaGRm18rEE9/0WKjvNE=
github.com/jfreymuth/vorbis v1.0.2/go.mod h1:DoftRo4AznKnShRl1GxiTFCseHr4zR9BN3TWXyuzrqQ=
github.com/lafriks/go-tiled v0.6.0 h1:kDJSvRPep6/5dtfdu0hqiAhXL40HmciMEXRb1TN/AU0=
github.com/lafriks/go-tiled v0.6.0/go.mod h1:xy+4iO8AKWpFNBWeqBqnq+Cb3Oirm5oin/irP/jPx6A=
github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4/go.mod h1:4OwLy04Bl9Ef3GJJCoec+30X3LQs/0/m4HFRt/2LUSA=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56/go.mod h1:JhuoJpWY28nO4Vef9tZUw9qufEGTyX1+7lmHxV5q5G4=
golang.org/x/exp v0.0.0-20220104160115-025e73f80486 h1:gpEOK9kxNqVPOaZayQV2bzetZplXWakHeirk1bXKu2s=
golang.org/x/exp v0.0.0-20220104160115-025e73f80486/go.mod h1:b9TAUYHmRtqA6klRHApnXMnj+OyLce4yF5cZCUbk2ps=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190703141733-d6a02ce849c9/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
golang.org/x/image v0.0.0-20211028202545-6944b10bf410 h1:hTftEOvwiOq2+O8k2D5/Q7COC7k5Qcrgc2TFURJYnvQ=
golang.org/x/image v0.0.0-20211028202545-6944b10bf410/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20190415191353-3e0bab5405d6/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
golang.org/x/mobile v0.0.0-20210902104108-5d9a33257ab5/go.mod h1:c4YKU3ZylDmvbw+H/PSvm42vhdWbuxCzbonauEAP9B8=
golang.org/x/mobile v0.0.0-20220104184238-4a8be17bd2e3 h1:A6xMk9ozH8+K90r7CpnP00jZ92Io02pQ/XLd55pZuf0=
golang.org/x/mobile v0.0.0-20220104184238-4a8be17bd2e3/go.mod h1:pe2sM7Uk+2Su1y7u/6Z8KJ24D7lepUjFZbhFOrmDfuQ=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190429190828-d89cdac9e872/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210917161153-d61c044b1678/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.6/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/tools v0.1.8-0.20211022200916-316ba0b74098/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

52
main.go Normal file
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@ -0,0 +1,52 @@
package main
import (
"log"
"os"
"os/signal"
"syscall"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/citylimits/game"
"github.com/hajimehoshi/ebiten/v2"
)
func main() {
ebiten.SetWindowTitle("City Limits")
ebiten.SetWindowResizable(true)
ebiten.SetWindowSize(640, 480)
ebiten.SetMaxTPS(144)
ebiten.SetRunnableOnUnfocused(true) // Note - this currently does nothing in ebiten
ebiten.SetWindowClosingHandled(true)
ebiten.SetFPSMode(ebiten.FPSModeVsyncOn)
g, err := game.NewGame()
if err != nil {
log.Fatal(err)
}
parseFlags()
/*if world.World.Debug == 0 {
world.SetMessage("MOVE: ARROW KEYS\nFIRE: Z KEY\nMUTE: M KEY", 144*4)
}*/
sigc := make(chan os.Signal, 1)
signal.Notify(sigc,
syscall.SIGINT,
syscall.SIGTERM)
go func() {
<-sigc
g.Exit()
}()
// TODO
world.StartGame()
err = ebiten.RunGame(g)
if err != nil {
log.Fatal(err)
}
}

43
system/camera.go Normal file
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@ -0,0 +1,43 @@
package system
import (
"code.rocketnine.space/tslocum/citylimits/component"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
)
const CameraMoveSpeed = 0.132
type CameraSystem struct {
}
func NewCameraSystem() *CameraSystem {
s := &CameraSystem{}
return s
}
func (_ *CameraSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.WeaponComponentID,
component.PositionComponentID,
}
}
func (_ *CameraSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *CameraSystem) Update(ctx *gohan.Context) error {
if !world.World.GameStarted || world.World.GameOver {
return nil
}
world.World.CamMoving = true
// TODO
return nil
}
func (_ *CameraSystem) Draw(_ *gohan.Context, screen *ebiten.Image) error {
return gohan.ErrSystemWithoutDraw
}

125
system/creep.go Normal file
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@ -0,0 +1,125 @@
package system
import (
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/citylimits/entity"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
)
// pause time, screen X, screen Y
type CreepSystem struct {
}
func NewCreepSystem() *CreepSystem {
s := &CreepSystem{}
return s
}
func (_ *CreepSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.ActorComponentID,
component.PositionComponentID,
}
}
func (_ *CreepSystem) Uses() []gohan.ComponentID {
return []gohan.ComponentID{
component.WeaponComponentID,
}
}
func (s *CreepSystem) Update(ctx *gohan.Context) error {
if !world.World.GameStarted {
return nil
}
creep := component.Creep(ctx)
position := component.Position(ctx)
if creep.Health <= 0 {
for i, e := range world.World.CreepEntities {
if e == ctx.Entity {
world.World.CreepRects = append(world.World.CreepRects[:i], world.World.CreepRects[i+1:]...)
world.World.CreepEntities = append(world.World.CreepEntities[:i], world.World.CreepEntities[i+1:]...)
ctx.RemoveEntity()
return nil
}
}
}
// Skip inactive creeps.
sx, sy := world.LevelCoordinatesToScreen(position.X, position.Y)
inactive := sx < 0 || sy < 0 || sx > 640 || sy > 480
if creep.Active != !inactive {
creep.Active = !inactive
}
if inactive {
return nil
}
l := len(creep.Movements)
if l > creep.Movement {
if creep.MovementTicks == 0 {
m := creep.Movements[creep.Movement]
position.X, position.Y = m[0], m[1]
creep.Movement++
creep.MovementTicks = int(m[2])
}
creep.MovementTicks--
}
randVelocity := func() (float64, float64) {
for {
vx := creep.Rand.Float64()*0.5 + (0.5 - creep.Rand.Float64())
vy := creep.Rand.Float64()*0.5 + (0.5 - creep.Rand.Float64())
if vx > 0.5 || vx < -0.5 || vy > 0.5 || vy < -0.5 {
return vx, vy
}
}
}
if creep.FireTicks == 0 {
for i := 0; i < creep.FireAmount; i++ {
vx, vy := randVelocity()
if creep.Rand.Intn(2) == 0 {
vx *= -1
}
if creep.Rand.Intn(2) == 0 {
vy *= -1
}
entity.NewCreepBullet(position.X, position.Y, vx, vy)
}
creep.FireTicks = creep.FireRate
}
creep.FireTicks--
if creep.DamageTicks > 0 {
creep.DamageTicks--
sprite := ECS.Component(ctx.Entity, component.SpriteComponentID)
if sprite != nil {
sp := sprite.(*component.SpriteComponent)
if creep.DamageTicks > 0 {
if creep.DamageTicks%2 == 0 {
sp.ColorScale = 100
} else {
sp.ColorScale = .01
}
sp.OverrideColorScale = true
} else {
sp.OverrideColorScale = false
}
}
}
return nil
}
func (_ *CreepSystem) Draw(_ *gohan.Context, screen *ebiten.Image) error {
return gohan.ErrSystemWithoutDraw
}

57
system/input_fire.go Normal file
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package system
import (
"code.rocketnine.space/tslocum/citylimits/component"
"code.rocketnine.space/tslocum/citylimits/entity"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
)
const (
fireSpeed = 1.5
)
type playerFireSystem struct {
}
func NewplayerFireSystem() *playerFireSystem {
return &playerFireSystem{}
}
func (_ *playerFireSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.PositionComponentID,
component.VelocityComponentID,
component.WeaponComponentID,
component.SpriteComponentID,
}
}
func (_ *playerFireSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *playerFireSystem) Update(ctx *gohan.Context) error {
if !world.World.GameStarted || world.World.GameOver {
return nil
}
position := component.Position(ctx)
weapon := component.Weapon(ctx)
if ebiten.IsKeyPressed(ebiten.KeyZ) || ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
if weapon.NextFire == 0 {
entity.NewPlayerBullet(position.X-8, position.Y-8, 0, -weapon.BulletSpeed)
entity.NewPlayerBullet(position.X+8, position.Y-8, 0, -weapon.BulletSpeed)
weapon.NextFire = weapon.FireRate
}
}
if weapon.NextFire > 0 {
weapon.NextFire--
}
return nil
}
func (s *playerFireSystem) Draw(_ *gohan.Context, _ *ebiten.Image) error {
return gohan.ErrSystemWithoutDraw
}

161
system/input_move.go Normal file
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package system
import (
"log"
"os"
"code.rocketnine.space/tslocum/citylimits/component"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/inpututil"
)
const (
moveSpeed = 1.5
)
type playerMoveSystem struct {
player gohan.Entity
movement *MovementSystem
lastWalkDirL bool
rewindTicks int
nextRewindTick int
}
func NewPlayerMoveSystem(player gohan.Entity, m *MovementSystem) *playerMoveSystem {
return &playerMoveSystem{
player: player,
movement: m,
}
}
func (_ *playerMoveSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.PositionComponentID,
component.VelocityComponentID,
component.WeaponComponentID,
}
}
func (_ *playerMoveSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *playerMoveSystem) Update(ctx *gohan.Context) error {
if ebiten.IsKeyPressed(ebiten.KeyEscape) && !world.World.DisableEsc {
os.Exit(0)
return nil
}
if ebiten.IsKeyPressed(ebiten.KeyControl) && inpututil.IsKeyJustPressed(ebiten.KeyV) {
v := 1
if ebiten.IsKeyPressed(ebiten.KeyShift) {
v = 2
}
if world.World.Debug == v {
world.World.Debug = 0
} else {
world.World.Debug = v
}
return nil
}
if ebiten.IsKeyPressed(ebiten.KeyControl) && inpututil.IsKeyJustPressed(ebiten.KeyN) {
world.World.NoClip = !world.World.NoClip
return nil
}
if !world.World.GameStarted {
if ebiten.IsKeyPressed(ebiten.KeyEnter) || ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
world.StartGame()
}
return nil
}
if inpututil.IsKeyJustPressed(ebiten.KeyM) {
// TODO mute sound
}
if world.World.GameOver {
if inpututil.IsKeyJustPressed(ebiten.KeyEnter) {
world.World.ResetGame = true
}
return nil
}
// TODO smooth camera zoom
pressLeft := ebiten.IsKeyPressed(ebiten.KeyLeft)
pressRight := ebiten.IsKeyPressed(ebiten.KeyRight)
pressUp := ebiten.IsKeyPressed(ebiten.KeyUp)
pressDown := ebiten.IsKeyPressed(ebiten.KeyDown)
const camSpeed = 10
if (pressLeft && !pressRight) ||
(pressRight && !pressLeft) {
if pressLeft {
world.World.CamX -= camSpeed
} else {
world.World.CamX += camSpeed
}
}
if (pressUp && !pressDown) ||
(pressDown && !pressUp) {
if pressUp {
world.World.CamY -= camSpeed
} else {
world.World.CamY += camSpeed
}
}
x, y := ebiten.CursorPosition()
if !world.World.GotCursorPosition {
if x != 0 || y != 0 {
world.World.GotCursorPosition = true
} else {
return nil
}
}
if x == 0 {
world.World.CamX -= camSpeed
} else if x == world.World.ScreenW-1 {
world.World.CamX += camSpeed
}
if y == 0 {
world.World.CamY -= camSpeed
} else if y == world.World.ScreenH-1 {
world.World.CamY += camSpeed
}
if world.World.HoverStructure != 0 {
xx, yy := world.ScreenToIso(x, y)
tileX, tileY := world.IsoToCartesian(xx, yy)
log.Println(x, y, tileX, tileY)
if tileX >= 0 && tileY >= 0 && tileX < 256 && tileY < 256 {
if int(tileX) != world.World.HoverX || int(tileY) != world.World.HoverY {
world.BuildStructure(world.World.HoverStructure, int(tileX), int(tileY))
world.World.HoverX, world.World.HoverY = int(tileX), int(tileY)
log.Println("BUILD", x, y, int(tileX), int(tileY))
}
}
}
return nil
}
func (s *playerMoveSystem) Draw(_ *gohan.Context, _ *ebiten.Image) error {
return gohan.ErrSystemWithoutDraw
}
func deltaXY(x1, y1, x2, y2 float64) (dx float64, dy float64) {
dx, dy = x1-x2, y1-y2
if dx < 0 {
dx *= -1
}
if dy < 0 {
dy *= -1
}
return dx, dy
}

68
system/input_profile.go Normal file
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package system
import (
"os"
"path"
"runtime"
"runtime/pprof"
"code.rocketnine.space/tslocum/citylimits/component"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/inpututil"
)
type profileSystem struct {
player gohan.Entity
cpuProfile *os.File
}
func NewProfileSystem(player gohan.Entity) *profileSystem {
return &profileSystem{
player: player,
}
}
func (s *profileSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.WeaponComponentID,
}
}
func (s *profileSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *profileSystem) Update(_ *gohan.Context) error {
if ebiten.IsKeyPressed(ebiten.KeyControl) && inpututil.IsKeyJustPressed(ebiten.KeyP) {
if s.cpuProfile == nil {
runtime.SetCPUProfileRate(1000)
homeDir, err := os.UserHomeDir()
if err != nil {
return err
}
s.cpuProfile, err = os.Create(path.Join(homeDir, "bbbb.prof"))
if err != nil {
return err
}
err = pprof.StartCPUProfile(s.cpuProfile)
if err != nil {
return err
}
} else {
pprof.StopCPUProfile()
s.cpuProfile.Close()
s.cpuProfile = nil
}
}
return nil
}
func (s *profileSystem) Draw(_ *gohan.Context, _ *ebiten.Image) error {
return gohan.ErrSystemWithoutDraw
}

181
system/movement.go Normal file
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package system
import (
"image"
"image/color"
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
)
const rewindThreshold = 1
type MovementSystem struct {
ScreenW, ScreenH float64
}
func NewMovementSystem() *MovementSystem {
s := &MovementSystem{
ScreenW: 640,
ScreenH: 480,
}
return s
}
func drawDebugRect(r image.Rectangle, c color.Color, overrideColorScale bool) gohan.Entity {
rectEntity := ECS.NewEntity()
rectImg := ebiten.NewImage(r.Dx(), r.Dy())
rectImg.Fill(c)
ECS.AddComponent(rectEntity, &component.PositionComponent{
X: float64(r.Min.X),
Y: float64(r.Min.Y),
})
ECS.AddComponent(rectEntity, &component.SpriteComponent{
Image: rectImg,
OverrideColorScale: overrideColorScale,
})
return rectEntity
}
func (_ *MovementSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.PositionComponentID,
component.VelocityComponentID,
}
}
func (_ *MovementSystem) Uses() []gohan.ComponentID {
return []gohan.ComponentID{
component.WeaponComponentID,
}
}
func (s *MovementSystem) Update(ctx *gohan.Context) error {
if !world.World.GameStarted {
return nil
}
if world.World.GameOver && ctx.Entity == world.World.Player {
return nil
}
position := component.Position(ctx)
velocity := component.Velocity(ctx)
vx, vy := velocity.X, velocity.Y
if ctx.Entity == world.World.Player && (world.World.NoClip || world.World.Debug != 0) && ebiten.IsKeyPressed(ebiten.KeyShift) {
vx, vy = vx*2, vy*2
}
position.X, position.Y = position.X+vx, position.Y+vy
// Force player to remain within the screen bounds.
// TODO same for bullets
if ctx.Entity == world.World.Player {
screenX, screenY := s.levelCoordinatesToScreen(position.X, position.Y)
if screenX < 0 {
diff := screenX / world.World.CamScale
position.X -= diff
} else if screenX > float64(world.World.ScreenW)-world.World.PlayerWidth {
diff := (float64(world.World.ScreenW) - world.World.PlayerWidth - screenX) / world.World.CamScale
position.X += diff
}
if screenY < 0 {
diff := screenY / world.World.CamScale
position.Y -= diff
} else if screenY > float64(world.World.ScreenH)-world.World.PlayerHeight {
diff := (float64(world.World.ScreenH) - world.World.PlayerHeight - screenY) / world.World.CamScale
position.Y += diff
}
world.World.PlayerX, world.World.PlayerY = position.X, position.Y
// Check player hazard collision.
if world.World.NoClip {
return nil
}
playerRect := image.Rect(int(position.X), int(position.Y), int(position.X+world.World.PlayerWidth), int(position.Y+world.World.PlayerHeight))
for _, r := range world.World.HazardRects {
if playerRect.Overlaps(r) {
world.World.SetGameOver(0, 0)
return nil
}
}
} else if ctx.Entity == world.World.BrokenPieceA || ctx.Entity == world.World.BrokenPieceB {
sprite := ECS.Component(ctx.Entity, component.SpriteComponentID).(*component.SpriteComponent)
if ctx.Entity == world.World.BrokenPieceA {
sprite.Angle -= 0.05
} else {
sprite.Angle += 0.05
}
}
// Check creepBullet collision.
if world.World.NoClip {
return nil
}
bulletSize := 8.0
bulletRect := image.Rect(int(position.X), int(position.Y), int(position.X+bulletSize), int(position.Y+bulletSize))
creepBullet := ECS.Component(ctx.Entity, component.CreepBulletComponentID)
playerBullet := ECS.Component(ctx.Entity, component.PlayerBulletComponentID)
// Check hazard collisions.
if creepBullet != nil || playerBullet != nil {
var invulnerable bool
if creepBullet != nil {
b := creepBullet.(*component.CreepBulletComponent)
invulnerable = b.Invulnerable
}
if !invulnerable {
for _, hazardRect := range world.World.HazardRects {
if bulletRect.Overlaps(hazardRect) {
ctx.RemoveEntity()
return nil
}
}
}
}
if creepBullet != nil {
playerRect := image.Rect(int(world.World.PlayerX), int(world.World.PlayerY), int(world.World.PlayerX+world.World.PlayerWidth), int(world.World.PlayerY+world.World.PlayerHeight))
if bulletRect.Overlaps(playerRect) {
world.World.SetGameOver(velocity.X, velocity.Y)
return nil
}
return nil
}
if playerBullet != nil {
for i, creepRect := range world.World.CreepRects {
if bulletRect.Overlaps(creepRect) {
creep := ECS.Component(world.World.CreepEntities[i], component.ActorComponentID).(*component.ActorComponent)
if creep.Active {
creep.Health--
creep.DamageTicks = 6
ctx.RemoveEntity()
return nil
}
}
}
}
return nil
}
func (s *MovementSystem) levelCoordinatesToScreen(x, y float64) (float64, float64) {
return (x - world.World.CamX) * world.World.CamScale, (y - world.World.CamY) * world.World.CamScale
}
func (_ *MovementSystem) Draw(_ *gohan.Context, screen *ebiten.Image) error {
return gohan.ErrSystemWithoutDraw
}

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system/render.go Normal file
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package system
import (
_ "image/png"
"time"
"golang.org/x/image/colornames"
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
)
const (
TileWidth = 128
logoText = "POWERED BY EBITEN"
logoTextScale = 4.75
logoTextWidth = 6.0 * float64(len(logoText)) * logoTextScale
logoTime = 144 * 3.5
fadeInTime = 144 * 0.75
)
type RenderSystem struct {
ScreenW int
ScreenH int
img *ebiten.Image
op *ebiten.DrawImageOptions
camScale float64
renderer gohan.Entity
}
func NewRenderSystem() *RenderSystem {
s := &RenderSystem{
renderer: ECS.NewEntity(),
img: ebiten.NewImage(320, 100),
op: &ebiten.DrawImageOptions{},
camScale: 1,
ScreenW: 640,
ScreenH: 480,
}
return s
}
func (s *RenderSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.PositionComponentID,
component.SpriteComponentID,
}
}
func (s *RenderSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *RenderSystem) Update(_ *gohan.Context) error {
return gohan.ErrSystemWithoutUpdate
}
func (s *RenderSystem) levelCoordinatesToScreen(x, y float64) (float64, float64) {
px, py := world.World.CamX, world.World.CamY
py *= -1
return ((x - px) * s.camScale), ((y + py) * s.camScale)
}
// renderSprite renders a sprite on the screen.
func (s *RenderSystem) renderSprite(x float64, y float64, offsetx float64, offsety float64, angle float64, geoScale float64, colorScale float64, alpha float64, hFlip bool, vFlip bool, sprite *ebiten.Image, target *ebiten.Image) int {
if alpha < .01 || colorScale < .01 {
return 0
}
xi, yi := world.CartesianToIso(float64(x), float64(y))
padding := float64(world.TileSize) * world.World.CamScale
cx, cy := float64(world.World.ScreenW/2), float64(world.World.ScreenH/2)
// Skip drawing tiles that are out of the screen.
drawX, drawY := world.IsoToScreen(xi, yi)
if drawX+padding < 0 || drawY+padding < 0 || drawX > float64(world.World.ScreenW) || drawY > float64(world.World.ScreenH) {
//log.Println("SKIP", drawX, drawY, world.World.ScreenW, world.World.ScreenH)
return 0
}
s.op.GeoM.Reset()
/*if hFlip {
s.op.GeoM.Scale(-1, 1)
s.op.GeoM.Translate(TileWidth, 0)
}
if vFlip {
s.op.GeoM.Scale(1, -1)
s.op.GeoM.Translate(0, TileWidth)
}*/
// Move to current isometric position.
s.op.GeoM.Translate(xi, yi)
// Translate camera position.
s.op.GeoM.Translate(-world.World.CamX, -world.World.CamY)
// Zoom.
s.op.GeoM.Scale(world.World.CamScale, world.World.CamScale)
// Center.
s.op.GeoM.Translate(cx, cy)
target.DrawImage(sprite, s.op)
/*s.op.GeoM.Scale(geoScale, geoScale)
// Rotate
s.op.GeoM.Translate(offsetx, offsety)
s.op.GeoM.Rotate(angle)
// Move to current isometric position.
s.op.GeoM.Translate(x, y)
// Translate camera position.
s.op.GeoM.Translate(-world.World.CamX, -world.World.CamY)
// Zoom.
s.op.GeoM.Scale(s.camScale, s.camScale)
// Center.
//s.op.GeoM.Translate(float64(s.ScreenW/2.0), float64(s.ScreenH/2.0))
s.op.ColorM.Scale(colorScale, colorScale, colorScale, alpha)
target.DrawImage(sprite, s.op)
s.op.ColorM.Reset()*/
return 1
}
func (s *RenderSystem) Draw(ctx *gohan.Context, screen *ebiten.Image) error {
if !world.World.GameStarted {
// TODO
if ctx.Entity == world.World.Player {
screen.Fill(colornames.Purple)
}
return nil
}
position := component.Position(ctx)
sprite := component.Sprite(ctx)
if sprite.NumFrames > 0 && time.Since(sprite.LastFrame) > sprite.FrameTime {
sprite.Frame++
if sprite.Frame >= sprite.NumFrames {
sprite.Frame = 0
}
sprite.Image = sprite.Frames[sprite.Frame]
sprite.LastFrame = time.Now()
}
colorScale := 1.0
if sprite.OverrideColorScale {
colorScale = sprite.ColorScale
}
s.renderSprite(position.X, position.Y, 0, 0, sprite.Angle, 1.0, colorScale, 1.0, sprite.HorizontalFlip, sprite.VerticalFlip, sprite.Image, screen)
return nil
}

60
system/renderdebug.go Normal file
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package system
import (
"fmt"
"image/color"
_ "image/png"
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
)
type RenderDebugTextSystem struct {
player gohan.Entity
op *ebiten.DrawImageOptions
debugImg *ebiten.Image
}
func NewRenderDebugTextSystem(player gohan.Entity) *RenderDebugTextSystem {
s := &RenderDebugTextSystem{
player: player,
op: &ebiten.DrawImageOptions{},
debugImg: ebiten.NewImage(94, 114),
}
return s
}
func (s *RenderDebugTextSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.PositionComponentID,
component.VelocityComponentID,
component.WeaponComponentID,
}
}
func (s *RenderDebugTextSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *RenderDebugTextSystem) Update(_ *gohan.Context) error {
return gohan.ErrSystemWithoutUpdate
}
func (s *RenderDebugTextSystem) Draw(ctx *gohan.Context, screen *ebiten.Image) error {
if world.World.Debug <= 0 {
return nil
}
position := component.Position(ctx)
velocity := component.Velocity(ctx)
s.debugImg.Fill(color.RGBA{0, 0, 0, 80})
ebitenutil.DebugPrint(s.debugImg, fmt.Sprintf("POS %.0f,%.0f\nVEL %.2f,%.2f\nENT %d\nUPD %d\nDRA %d\nTPS %0.0f\nFPS %0.0f", position.X, position.Y, velocity.X, velocity.Y, ECS.CurrentEntities(), ECS.CurrentUpdates(), ECS.CurrentDraws(), ebiten.CurrentTPS(), ebiten.CurrentFPS()))
screen.DrawImage(s.debugImg, nil)
return nil
}

100
system/rendermessage.go Normal file
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package system
import (
"image/color"
"strings"
"code.rocketnine.space/tslocum/citylimits/component"
"code.rocketnine.space/tslocum/citylimits/world"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
)
type RenderMessageSystem struct {
op *ebiten.DrawImageOptions
logoImg *ebiten.Image
msgImg *ebiten.Image
tmpImg *ebiten.Image
}
func NewRenderMessageSystem() *RenderMessageSystem {
s := &RenderMessageSystem{
op: &ebiten.DrawImageOptions{},
logoImg: ebiten.NewImage(1, 1),
msgImg: ebiten.NewImage(1, 1),
tmpImg: ebiten.NewImage(200, 200),
}
return s
}
func (s *RenderMessageSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.PositionComponentID,
component.VelocityComponentID,
component.WeaponComponentID,
}
}
func (s *RenderMessageSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *RenderMessageSystem) Update(_ *gohan.Context) error {
if !world.World.GameStarted || world.World.GameOver || !world.World.MessageVisible {
return nil
}
world.World.MessageTicks++
if world.World.MessageTicks == world.World.MessageDuration {
world.World.MessageVisible = false
return nil
}
return nil
}
func (s *RenderMessageSystem) Draw(_ *gohan.Context, screen *ebiten.Image) error {
if !world.World.GameStarted || !world.World.MessageVisible {
return nil
}
// Draw message.
if world.World.MessageUpdated {
s.drawMessage()
}
bounds := s.msgImg.Bounds()
x := (float64(world.World.ScreenW) / 2) - (float64(bounds.Dx()) / 2)
y := (float64(world.World.ScreenH) / 2) - (float64(bounds.Dy()) / 2)
s.op.GeoM.Reset()
s.op.GeoM.Translate(x, y)
screen.DrawImage(s.msgImg, s.op)
return nil
}
func (s *RenderMessageSystem) drawMessage() {
split := strings.Split(world.World.MessageText, "\n")
width := 0
for _, line := range split {
lineSize := len(line) * 12
if lineSize > width {
width = lineSize
}
}
height := len(split) * 32
const padding = 8
width, height = width+padding*2, height+padding*2
s.msgImg = ebiten.NewImage(width, height)
s.msgImg.Fill(color.RGBA{17, 17, 17, 255})
s.tmpImg.Clear()
s.tmpImg = ebiten.NewImage(width*2, height*2)
s.op.GeoM.Reset()
s.op.GeoM.Scale(2, 2)
s.op.GeoM.Translate(float64(padding), float64(padding))
ebitenutil.DebugPrint(s.tmpImg, world.World.MessageText)
s.msgImg.DrawImage(s.tmpImg, s.op)
s.op.ColorM.Reset()
}

32
world/level.go Normal file
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package world
import "github.com/hajimehoshi/ebiten/v2"
type Tile struct {
Sprite *ebiten.Image
}
type GameLevel struct {
Tiles [][][]*Tile
size int
}
func NewLevel(size int) *GameLevel {
l := &GameLevel{
size: size,
}
const numLayers = 3
for i := 0; i < numLayers; i++ {
l.AddLayer()
}
return l
}
func (l *GameLevel) AddLayer() {
tileMap := make([][]*Tile, l.size)
for x := 0; x < l.size; x++ {
tileMap[x] = make([]*Tile, l.size)
}
l.Tiles = append(l.Tiles, tileMap)
}

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world/structure.go Normal file
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package world
import "code.rocketnine.space/tslocum/gohan"
type Structure struct {
Type int
X, Y int
Entity gohan.Entity
Children []gohan.Entity
}

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world/world.go Normal file
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package world
import (
"errors"
"fmt"
"image"
"log"
"math/rand"
"path/filepath"
"time"
"code.rocketnine.space/tslocum/citylimits/asset"
"code.rocketnine.space/tslocum/citylimits/component"
. "code.rocketnine.space/tslocum/citylimits/ecs"
"code.rocketnine.space/tslocum/gohan"
"github.com/hajimehoshi/ebiten/v2"
"github.com/lafriks/go-tiled"
)
const TileSize = 128
const (
StructureHouse1 = iota + 1
StructurePoliceStation
)
var World = &GameWorld{
CamScale: 1,
CamMoving: true,
PlayerWidth: 8,
PlayerHeight: 32,
TileImages: make(map[uint32]*ebiten.Image),
ResetGame: true,
Level: NewLevel(256),
}
type GameWorld struct {
Level *GameLevel
Player gohan.Entity
ScreenW, ScreenH int
DisableEsc bool
Debug int
NoClip bool
GameStarted bool
GameStartedTicks int
GameOver bool
MessageVisible bool
MessageTicks int
MessageDuration int
MessageUpdated bool
MessageText string
PlayerX, PlayerY float64
CamX, CamY float64
CamScale float64
CamMoving bool
PlayerWidth float64
PlayerHeight float64
HoverStructure int
HoverX, HoverY int
HoverLastX, HoverLastY int
Map *tiled.Map
ObjectGroups []*tiled.ObjectGroup
HazardRects []image.Rectangle
CreepRects []image.Rectangle
CreepEntities []gohan.Entity
TriggerEntities []gohan.Entity
TriggerRects []image.Rectangle
TriggerNames []string
NativeResolution bool
BrokenPieceA, BrokenPieceB gohan.Entity
TileImages map[uint32]*ebiten.Image
ResetGame bool
GotCursorPosition bool
tilesets []*ebiten.Image
resetTipShown bool
}
func TileToGameCoords(x, y int) (float64, float64) {
//return float64(x) * 32, float64(g.currentMap.Height*32) - float64(y)*32 - 32
return float64(x) * TileSize, float64(y) * TileSize
}
func Reset() {
for _, e := range ECS.Entities() {
ECS.RemoveEntity(e)
}
World.Player = 0
World.ObjectGroups = nil
World.HazardRects = nil
World.CreepRects = nil
World.CreepEntities = nil
World.TriggerEntities = nil
World.TriggerRects = nil
World.TriggerNames = nil
World.MessageVisible = false
}
func BuildStructure(structureType int, placeX int, placeY int) (*Structure, error) {
tt := time.Now()
defer func() {
log.Println(time.Since(tt))
}()
loader := tiled.Loader{
FileSystem: asset.FS,
}
var filePath string
switch structureType {
case StructureHouse1:
filePath = "map/house1.tmx"
case StructurePoliceStation:
filePath = "map/policestation.tmx"
default:
panic(fmt.Sprintf("unknown structure %d", structureType))
}
// Parse .tmx file.
m, err := loader.LoadFromFile(filepath.FromSlash(filePath))
if err != nil {
log.Fatalf("error parsing world: %+v", err)
}
if placeX < 0 || placeY < 0 || placeX+m.Width > 256 || placeY+m.Height > 256 {
return nil, errors.New("invalid location: building does not fit")
}
// Load tileset.
tileset := m.Tilesets[0]
if len(World.tilesets) == 0 {
imgPath := filepath.Join("./image/tileset/", tileset.Image.Source)
f, err := asset.FS.Open(filepath.FromSlash(imgPath))
if err != nil {
panic(err)
}
defer f.Close()
img, _, err := image.Decode(f)
if err != nil {
panic(err)
}
World.tilesets = append(World.tilesets, ebiten.NewImageFromImage(img))
}
// Load tiles.
for i := uint32(0); i < uint32(tileset.TileCount); i++ {
rect := tileset.GetTileRect(i)
World.TileImages[i+tileset.FirstGID] = World.tilesets[0].SubImage(rect).(*ebiten.Image)
}
createTileEntity := func(t *tiled.LayerTile, x float64, y float64) gohan.Entity {
mapTile := ECS.NewEntity()
ECS.AddComponent(mapTile, &component.PositionComponent{
X: x,
Y: y,
})
sprite := &component.SpriteComponent{
Image: World.TileImages[t.Tileset.FirstGID+t.ID],
HorizontalFlip: t.HorizontalFlip,
VerticalFlip: t.VerticalFlip,
DiagonalFlip: t.DiagonalFlip,
}
ECS.AddComponent(mapTile, sprite)
return mapTile
}
_ = createTileEntity
structure := &Structure{
Type: structureType,
X: placeX,
Y: placeY,
}
// TODO Add entity
var t *tiled.LayerTile
for i, layer := range m.Layers {
for y := 0; y < m.Height; y++ {
for x := 0; x < m.Width; x++ {
t = layer.Tiles[y*m.Width+x]
if t == nil || t.Nil {
continue // No tile at this position.
}
tileImg := World.TileImages[t.Tileset.FirstGID+t.ID]
if tileImg == nil {
continue
}
for i > len(World.Level.Tiles)-2 {
World.Level.AddLayer()
}
if World.Level.Tiles[i][x+placeX][y+placeY] == nil {
World.Level.Tiles[i][x+placeX][y+placeY] = &Tile{}
}
World.Level.Tiles[i][x+placeX][y+placeY].Sprite = World.TileImages[t.Tileset.FirstGID+t.ID]
// TODO handle flipping
//tileX, tileY := TileToGameCoords(x, y)
//e := createTileEntity(t, tileX+float64(layer.OffsetY*2), tileY+float64(layer.OffsetY*2))
//tileEntities = append(tileEntities, e)
}
}
}
// Load ObjectGroups.
var objects []*tiled.ObjectGroup
var loadObjects func(grp *tiled.Group)
loadObjects = func(grp *tiled.Group) {
for _, subGrp := range grp.Groups {
loadObjects(subGrp)
}
for _, objGrp := range grp.ObjectGroups {
objects = append(objects, objGrp)
}
}
for _, grp := range m.Groups {
loadObjects(grp)
}
for _, objGrp := range m.ObjectGroups {
objects = append(objects, objGrp)
}
World.Map = m
World.ObjectGroups = objects
for _, grp := range World.ObjectGroups {
if grp.Name == "TRIGGERS" {
for _, obj := range grp.Objects {
mapTile := ECS.NewEntity()
ECS.AddComponent(mapTile, &component.PositionComponent{
X: obj.X,
Y: obj.Y - 32,
})
ECS.AddComponent(mapTile, &component.SpriteComponent{
Image: World.TileImages[obj.GID],
})
World.TriggerNames = append(World.TriggerNames, obj.Name)
World.TriggerEntities = append(World.TriggerEntities, mapTile)
World.TriggerRects = append(World.TriggerRects, ObjectToRect(obj))
}
} else if grp.Name == "HAZARDS" {
for _, obj := range grp.Objects {
r := ObjectToRect(obj)
r.Min.Y += 32
r.Max.Y += 32
World.HazardRects = append(World.HazardRects, r)
}
} else if grp.Name == "CREEPS" {
for _, obj := range grp.Objects {
creepType := component.CreepSnowblower
switch obj.GID {
case 9:
creepType = component.CreepSmallRock
case 18:
creepType = component.CreepMediumRock
case 23:
creepType = component.CreepLargeRock
}
r := ObjectToRect(obj)
c := NewActor(creepType, int64(obj.ID), float64(r.Min.X), float64(r.Min.Y))
World.CreepRects = append(World.CreepRects, r)
World.CreepEntities = append(World.CreepEntities, c)
}
}
}
return structure, nil
}
func ObjectToRect(o *tiled.Object) image.Rectangle {
x, y, w, h := int(o.X), int(o.Y), int(o.Width), int(o.Height)
y -= 32
return image.Rect(x, y, x+w, y+h)
}
func LevelCoordinatesToScreen(x, y float64) (float64, float64) {
return (x - World.CamX) * World.CamScale, (y - World.CamY) * World.CamScale
}
func (w *GameWorld) SetGameOver(vx, vy float64) {
if w.GameOver {
return
}
w.GameOver = true
// TODO
}
// TODO move
func NewActor(creepType int, creepID int64, x float64, y float64) gohan.Entity {
actor := ECS.NewEntity()
ECS.AddComponent(actor, &component.PositionComponent{
X: x,
Y: y,
})
ECS.AddComponent(actor, &component.ActorComponent{
Type: creepType,
Health: 64,
FireAmount: 8,
FireRate: 144 / 4,
Rand: rand.New(rand.NewSource(creepID)),
})
return actor
}
func StartGame() {
if World.GameStarted {
return
}
World.GameStarted = true
}
func SetMessage(message string, duration int) {
World.MessageText = message
World.MessageVisible = true
World.MessageUpdated = true
World.MessageDuration = duration
World.MessageTicks = 0
}
// CartesianToIso transforms cartesian coordinates into isometric coordinates.
func CartesianToIso(x, y float64) (float64, float64) {
ix := (x - y) * float64(TileSize/2)
iy := (x + y) * float64(TileSize/4)
return ix, iy
}
// CartesianToIso transforms cartesian coordinates into isometric coordinates.
func IsoToCartesian(x, y float64) (float64, float64) {
cx := (x/float64(TileSize/2) + y/float64(TileSize/4)) / 2
cy := (y/float64(TileSize/4) - (x / float64(TileSize/2))) / 2
return cx, cy
}
func IsoToScreen(x, y float64) (float64, float64) {
cx, cy := float64(World.ScreenW/2), float64(World.ScreenH/2)
return ((x - World.CamX) * World.CamScale) + cx, ((y - World.CamY) * World.CamScale) + cy
}
func ScreenToIso(x, y int) (float64, float64) {
cx, cy := float64(World.ScreenW/2), float64(World.ScreenH/2)
return ((float64(x) - cx) / World.CamScale) + World.CamX, ((float64(y) - cy) / World.CamScale) + World.CamY
}