Light: add rectangle shadow map

h3d/pass/RectangleShadowMap.hx

@@ -0,0 +1,66 @@
+package h3d.pass;
+
+import h3d.scene.pbr.RectangleLight;
+
+class RectangleShadowMap extends CubeShadowMap {
+
+	var pshader : h3d.shader.PointShadow;
+
+	public function new( light : h3d.scene.Light, useWorldDist : Bool ) {
+		super(light, useWorldDist);
+		shader = pshader = new h3d.shader.PointShadow();
+	}
+
+	override function set_mode(m:Shadows.RenderMode) {
+		pshader.enable = m != None && enabled;
+		return mode = m;
+	}
+
+	override function set_enabled(b:Bool) {
+		pshader.enable = b && mode != None;
+		return enabled = b;
+	}
+
+	override function getShadowTex() {
+		return pshader.shadowMap;
+	}
+
+	override function syncShader(texture) {
+		if( texture == null )
+			throw "assert";
+
+		var rectangleLight = cast(light, h3d.scene.pbr.RectangleLight);
+		pshader.shadowMap = texture;
+		pshader.shadowBias = bias;
+		pshader.shadowPower = power;
+		pshader.lightPos = light.getAbsPos().getPosition();
+		pshader.zFar = rectangleLight.range;
+
+		// ESM
+		pshader.USE_ESM = samplingKind == ESM;
+		pshader.shadowPower = power;
+
+		// PCF
+		pshader.USE_PCF = samplingKind == PCF;
+		pshader.pcfScale = pcfScale / 100.0;
+		pshader.pcfQuality = pcfQuality;
+	}
+
+	override function createCollider(light : h3d.scene.Light) {
+		var absPos = light.getAbsPos();
+		var rectangleLight = cast(light, h3d.scene.pbr.RectangleLight);
+		// TODO : Optimize culling
+		return new h3d.col.Sphere(absPos.tx, absPos.ty, absPos.tz, rectangleLight.range);
+	}
+
+	override function cull(lightCollider : h3d.col.Collider, col : h3d.col.Collider ) {
+		var sphere = cast(lightCollider, h3d.col.Sphere);
+		return col.inSphere(sphere);
+	}
+
+	override function updateLightCameraNearFar(light : h3d.scene.Light) {
+		var rectangleLight = cast(light, h3d.scene.pbr.RectangleLight);
+		lightCamera.zFar = rectangleLight.range;
+		lightCamera.zNear = 0.01;
+	}
+}

h3d/scene/pbr/RectangleLight.hx

@@ -1,5 +1,6 @@
 package h3d.scene.pbr;
 
+import h3d.pass.RectangleShadowMap;
 import h3d.prim.Cube;
 
 class RectangleLight extends Light {
@@ -14,7 +15,7 @@ class RectangleLight extends Light {
 
 	public function new(?parent) {
 		pbr = new h3d.shader.pbr.Light.RectangleLight();
-		shadows = new h3d.pass.CapsuleShadowMap(this, true);
+		shadows = new RectangleShadowMap(this, true);
 		super(pbr,parent);
 		range = 10;
 	}