Add worldLightPosition option.

Author: gonnavis

examples/jsm/postprocessing/SSShadowPass.js

@@ -66,6 +66,23 @@ class SSRrPass extends Pass {
 			}
 		} );
 
+		this._worldLightPosition = SSRrShader.defines.WORLD_LIGHT_POSITION;
+		Object.defineProperty( this, 'worldLightPosition', {
+			get() {
+
+				return this._worldLightPosition;
+
+			},
+			set( val ) {
+
+				if ( this._worldLightPosition === val ) return;
+				this._worldLightPosition = val;
+				this.ssrrMaterial.defines.WORLD_LIGHT_POSITION = val;
+				this.ssrrMaterial.needsUpdate = true;
+
+			}
+		} );
+
 		// beauty render target with depth buffer
 
 		const depthTexture = new DepthTexture();
@@ -134,6 +151,7 @@ class SSRrPass extends Pass {
 		this.ssrrMaterial.uniforms[ 'resolution' ].value.set( this.width, this.height );
 		this.ssrrMaterial.uniforms[ 'cameraProjectionMatrix' ].value.copy( this.camera.projectionMatrix );
 		this.ssrrMaterial.uniforms[ 'cameraInverseProjectionMatrix' ].value.copy( this.camera.projectionMatrixInverse );
+		this.ssrrMaterial.uniforms[ 'cameraMatrixWorldInverse' ].value.copy( this.camera.matrixWorldInverse );
 
 		// normal material
 
@@ -231,6 +249,7 @@ class SSRrPass extends Pass {
 		this.ssrrMaterial.uniforms[ 'maxDistance' ].value = this.maxDistance;
 		this.ssrrMaterial.uniforms[ 'surfDist' ].value = this.surfDist;
 		this.ssrrMaterial.uniforms[ 'doubleSideCheckStartFrom' ].value = this.doubleSideCheckStartFrom;
+		this.ssrrMaterial.uniforms[ 'cameraMatrixWorldInverse' ].value.copy( this.camera.matrixWorldInverse );
 		this.renderPass( renderer, this.ssrrMaterial, this.ssrrRenderTarget );
 
 		// output result to screen

examples/jsm/shaders/SSShadowShader.js

@@ -10,6 +10,7 @@ const SSRrShader = {
 		MAX_STEP: 0,
 		PERSPECTIVE_CAMERA: true,
 		INFINITE_THICK: false,
+		WORLD_LIGHT_POSITION: false,
 	},
 
 	uniforms: {
@@ -23,6 +24,7 @@ const SSRrShader = {
 		'resolution': { value: new Vector2() },
 		'cameraProjectionMatrix': { value: new Matrix4() },
 		'cameraInverseProjectionMatrix': { value: new Matrix4() },
+		'cameraMatrixWorldInverse': { value: new Matrix4() },
 		'lightPosition': { value: new Vector3(1.7,1.7,0) },
 		'cameraRange': { value: 0 },
 		'maxDistance': { value: 180 },
@@ -60,6 +62,7 @@ const SSRrShader = {
 		uniform vec3 lightPosition;
 		uniform mat4 cameraProjectionMatrix;
 		uniform mat4 cameraInverseProjectionMatrix;
+		uniform mat4 cameraMatrixWorldInverse;
 		uniform float maxDistance;
 		uniform float surfDist;
 		uniform float doubleSideCheckStartFrom;
@@ -124,7 +127,12 @@ const SSRrShader = {
 
 			vec3 viewNormal=getViewNormal( vUv );
 
-			vec3 viewRefractDir=normalize(lightPosition-viewPosition);
+			#ifdef WORLD_LIGHT_POSITION
+				vec3 viewLightPosition=(cameraMatrixWorldInverse*vec4(lightPosition,1.)).xyz;
+			#else
+				vec3 viewLightPosition=lightPosition;
+			#endif
+			vec3 viewRefractDir=normalize(viewLightPosition-viewPosition);
 
 			vec3 d1viewPosition=viewPosition+viewRefractDir*maxDistance;
 			#ifdef PERSPECTIVE_CAMERA

examples/screenshots/webgl_postprocessing_ssshadow.jpg

@@ -33,7 +33,7 @@
 
 		const params = {
 			enableSSRr: true,
-			autoRotate: false,
+			autoRotate: true,
 		};
 		let composer;
 		let ssrrPass;
@@ -179,9 +179,10 @@
 
 			gui = new GUI();
 			gui.add( params, 'enableSSRr' ).name( 'Enable SSRr' );
-			gui.add( ssrrPass.lightPosition, 'x' ).name('lightX').min( 0 ).max( 10 ).step( .0001 );
-			gui.add( ssrrPass.lightPosition, 'y' ).name('lightY').min( 0 ).max( 10 ).step( .0001 );
-			gui.add( ssrrPass.lightPosition, 'z' ).name('lightZ').min( 0 ).max( 10 ).step( .0001 );
+			gui.add( ssrrPass.lightPosition, 'x' ).name('lightX').min( -10 ).max( 10 ).step( .0001 );
+			gui.add( ssrrPass.lightPosition, 'y' ).name('lightY').min( -10 ).max( 10 ).step( .0001 );
+			gui.add( ssrrPass.lightPosition, 'z' ).name('lightZ').min( -10 ).max( 10 ).step( .0001 );
+			gui.add( ssrrPass, 'worldLightPosition' );
 			gui.add( ssrrPass, 'doubleSideCheckStartFrom' ).min( 0 ).max( .1 ).step( .0001 );
 			gui.add( params, 'autoRotate' ).onChange( () => {