carotidartillery/creep.go

47 lines
633 B
Go

package main
import (
"math/rand"
"sync"
"github.com/hajimehoshi/ebiten/v2"
)
type creep struct {
x, y float64
sprite *ebiten.Image
moveX, moveY float64
tick int
nextAction int
sync.Mutex
}
func (c *creep) doNextAction() {
c.moveX = (rand.Float64() - 0.5) / 10
c.moveY = (rand.Float64() - 0.5) / 10
c.nextAction = 400 + rand.Intn(1000)
}
func (c *creep) Update() {
c.Lock()
defer c.Unlock()
c.tick++
if c.tick >= c.nextAction {
c.doNextAction()
c.tick = 0
}
c.x, c.y = c.x+c.moveX, c.y+c.moveY
}
func (c *creep) Position() (float64, float64) {
c.Lock()
defer c.Unlock()
return c.x, c.y
}