aabb.adept

// ----------------------------- aabb.adept -----------------------------
// Module for detecting collision between axis-aligned bounding boxes
// ----------------------------------------------------------------------

struct AABB (x float, y float, w float, h float)

func set(this *AABB, x float, y float, w float, h float) void {
    this.x = x; this.y = y
    this.w = w; this.h = h
}

func set(this *AABB, other *AABB) void {
    this.x = other.x; this.y = other.y
    this.w = other.w; this.h = other.h
}

func intersecting(this *AABB, other *AABB) bool {
    return this.x < other.x + other.w && this.x + this.w > other.x && this.y < other.y + other.h && this.h + this.y > other.y
}

func intersecting(this *AABB, x float, y float, w float, h float) bool {
    return this.x < x + w && this.x + this.w > x && this.y < y + h && this.h + this.y > y
}

func intersecting(this *AABB, x float, y float) bool {
    return x > this.x && x < this.x + this.w && y > this.y && y < this.y + this.w
}

func equals(this *AABB, other *AABB) bool {
    unless this.x == other.x, return false
    unless this.y == other.y, return false
    unless this.w == other.w, return false
    unless this.h == other.h, return false
    return true
}