Object Occlusion Culling

leenkx/Sources/iron/object/FrustumPlane.hx

@@ -0,0 +1,25 @@
+package iron.object;
+
+import iron.math.Vec4;
+
+class FrustumPlane {
+	public var normal = new Vec4(1.0, 0.0, 0.0);
+	public var constant = 0.0;
+
+	public function new() {}
+
+	public function normalize() {
+		var inverseNormalLength = 1.0 / normal.length();
+		normal.mult(inverseNormalLength);
+		constant *= inverseNormalLength;
+	}
+
+	public function distanceToSphere(sphereCenter: Vec4, sphereRadius: Float): Float {
+		return (normal.dot(sphereCenter) + constant) - sphereRadius;
+	}
+
+	public inline function setComponents(x: Float, y: Float, z: Float, w: Float) {
+		normal.set(x, y, z);
+		constant = w;
+	}
+}