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import kotlinx.browser.document
import org.w3c.dom.CanvasRenderingContext2D
import org.w3c.dom.HTMLCanvasElement
class Minimap(private val map: Map) {
private val scale = 15
private val canvas = (document.getElementById("minimap") as HTMLCanvasElement)
.apply {
width = map.width * scale
height = map.height * scale
}
private val context = canvas.getContext("2d") as CanvasRenderingContext2D
private fun drawMap() {
for (y in 0 until map.height) {
for (x in 0 until map.width) {
val wall = map.data[y][x]
if (wall > 0) {
context.fillStyle = "#202020"
context.fillRect((x * scale).toDouble(), (y * scale).toDouble(), scale.toDouble(), scale.toDouble())
}
}
}
}
fun update(camera: Camera) {
context.clearRect(0.0, 0.0, (map.width * scale).toDouble(), (map.height * scale).toDouble())
drawMap()
context.fillStyle = "#FF0000"
context.fillRect((camera.xPos * scale)-5, (camera.yPos * scale)-5, 10.0, 10.0)
context.strokeStyle = "#00FF00"
context.lineWidth = 2.0
context.beginPath()
context.moveTo(camera.xPos * scale, camera.yPos * scale)
val cameraCos = camera.rotation.cosine()
val cameraSin = camera.rotation.sine()
val dirX = camera.xPos + cameraCos
val dirY = camera.yPos + cameraSin
context.lineTo(dirX * scale, dirY * scale)
context.stroke()
}
}
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