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package coffee.liz.ecs
/**
* Rectangle in cartesian space.
*/
data class Rect(
val topLeft: Vec2,
val dimensions: Vec2
) {
fun overlaps(other: Rect): Boolean {
val xOverlap = topLeft.x <= other.topLeft.x + other.dimensions.x &&
topLeft.x + dimensions.x >= other.topLeft.x
val yOverlap = topLeft.y <= other.topLeft.y + other.dimensions.y &&
topLeft.y + dimensions.y >= other.topLeft.y
return xOverlap && yOverlap
}
}
/**
* Cartesian point.
*/
data class Vec2(
val x: Float,
val y: Float
) {
fun plus(other: Vec2): Vec2 = Vec2(x + other.x, y + other.y)
fun minus(other: Vec2): Vec2 = Vec2(x - other.x, y - other.y)
fun times(scalar: Float): Vec2 = Vec2(x * scalar, y * scalar)
fun div(scalar: Float): Vec2 = Vec2(x / scalar, y / scalar)
fun distanceTo(other: Vec2): Float = (this.minus(other)).length()
fun normalize(): Vec2 = this.div(length())
fun length(): Float = kotlin.math.sqrt(x * x + y * y)
}
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