Examples: Updated webgl_materials_modified example.

examples/webgl_materials_modified.html

@@ -24,46 +24,29 @@
 
 			var camera, scene, renderer, stats;
 
-			var materialShader;
-
 			init();
 			animate();
 
 			function init() {
 
-				camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 1, 10000 );
-				camera.position.z = 1500;
+				camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 0.1, 100 );
+				camera.position.z = 20;
 
 				scene = new THREE.Scene();
 
-				var material = new THREE.MeshNormalMaterial();
-				material.onBeforeCompile = function ( shader ) {
-
-					shader.uniforms.time = { value: 0 };
-
-					shader.vertexShader = 'uniform float time;\n' + shader.vertexShader;
-					shader.vertexShader = shader.vertexShader.replace(
-						'#include <begin_vertex>',
-						[
-							'float theta = sin( time + position.y ) / 2.0;',
-							'float c = cos( theta );',
-							'float s = sin( theta );',
-							'mat3 m = mat3( c, 0, s, 0, 1, 0, -s, 0, c );',
-							'vec3 transformed = vec3( position ) * m;',
-							'vNormal = vNormal * m;'
-						].join( '\n' )
-					);
-
-					materialShader = shader;
-
-				};
-
 				var loader = new GLTFLoader();
 				loader.load( 'models/gltf/LeePerrySmith/LeePerrySmith.glb', function ( gltf ) {
 
-					var mesh = new THREE.Mesh( gltf.scene.children[ 0 ].geometry, material );
-					mesh.position.y = - 50;
-					mesh.scale.setScalar( 100 );
+					var geometry = gltf.scene.children[ 0 ].geometry;
+
+					var mesh = new THREE.Mesh( geometry, buildTwistMaterial( 2.0 ) );
+					mesh.position.x = - 3.5;
+					mesh.position.y = - 0.5;
+					scene.add( mesh );
+
+					var mesh = new THREE.Mesh( geometry, buildTwistMaterial( - 2.0 ) );
+					mesh.position.x = 3.5;
+					mesh.position.y = - 0.5;
 					scene.add( mesh );
 
 				} );
@@ -88,6 +71,42 @@
 
 			}
 
+			function buildTwistMaterial( amount ) {
+
+				var material = new THREE.MeshNormalMaterial();
+				material.onBeforeCompile = function ( shader ) {
+
+					shader.uniforms.time = { value: 0 };
+
+					shader.vertexShader = 'uniform float time;\n' + shader.vertexShader;
+					shader.vertexShader = shader.vertexShader.replace(
+						'#include <begin_vertex>',
+						[
+							`float theta = sin( time + position.y ) / ${ amount.toFixed( 1 ) };`,
+							'float c = cos( theta );',
+							'float s = sin( theta );',
+							'mat3 m = mat3( c, 0, s, 0, 1, 0, -s, 0, c );',
+							'vec3 transformed = vec3( position ) * m;',
+							'vNormal = vNormal * m;'
+						].join( '\n' )
+					);
+
+					material.userData.shader = shader;
+
+				};
+
+				// Make sure WebGLRenderer doesnt reuse a single program
+
+				material.customProgramCacheKey = function () {
+
+					return amount;
+
+				};
+
+				return material;
+
+			}
+
 			//
 
 			function onWindowResize() {
@@ -116,11 +135,21 @@
 
 			function render() {
 
-				if ( materialShader ) {
+				scene.traverse( function ( child ) {
+
+					if ( child.isMesh ) {
+
+						const shader = child.material.userData.shader;
+
+						if ( shader ) {
 
-					materialShader.uniforms.time.value = performance.now() / 1000;
+							shader.uniforms.time.value = performance.now() / 1000;
 
-				}
+						}
+
+					}
+
+				} );
 
 				renderer.render( scene, camera );