/** * @author alteredq / http://alteredqualia.com/ * @author mrdoob / http://mrdoob.com/ * * ShaderUtils currently contains: * * fresnel * normal * cube * */ if ( THREE.WebGLRenderer ) { THREE.ShaderUtils = { lib: { /* ------------------------------------------------------------------------- // Fresnel shader // - based on Nvidia Cg tutorial ------------------------------------------------------------------------- */ 'fresnel': { uniforms: { "mRefractionRatio": { type: "f", value: 1.02 }, "mFresnelBias": { type: "f", value: 0.1 }, "mFresnelPower": { type: "f", value: 2.0 }, "mFresnelScale": { type: "f", value: 1.0 }, "tCube": { type: "t", value: 1, texture: null } }, fragmentShader: [ "uniform samplerCube tCube;", "varying vec3 vReflect;", "varying vec3 vRefract[3];", "varying float vReflectionFactor;", "void main() {", "vec4 reflectedColor = textureCube( tCube, vec3( -vReflect.x, vReflect.yz ) );", "vec4 refractedColor = vec4( 1.0, 1.0, 1.0, 1.0 );", "refractedColor.r = textureCube( tCube, vec3( -vRefract[0].x, vRefract[0].yz ) ).r;", "refractedColor.g = textureCube( tCube, vec3( -vRefract[1].x, vRefract[1].yz ) ).g;", "refractedColor.b = textureCube( tCube, vec3( -vRefract[2].x, vRefract[2].yz ) ).b;", "refractedColor.a = 1.0;", "gl_FragColor = mix( refractedColor, reflectedColor, clamp( vReflectionFactor, 0.0, 1.0 ) );", "}" ].join("\n"), vertexShader: [ "uniform float mRefractionRatio;", "uniform float mFresnelBias;", "uniform float mFresnelScale;", "uniform float mFresnelPower;", "varying vec3 vReflect;", "varying vec3 vRefract[3];", "varying float vReflectionFactor;", "void main() {", "vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );", "vec4 mPosition = modelMatrix * vec4( position, 1.0 );", "vec3 nWorld = normalize( mat3( modelMatrix[0].xyz, modelMatrix[1].xyz, modelMatrix[2].xyz ) * normal );", "vec3 I = mPosition.xyz - cameraPosition;", "vReflect = reflect( I, nWorld );", "vRefract[0] = refract( normalize( I ), nWorld, mRefractionRatio );", "vRefract[1] = refract( normalize( I ), nWorld, mRefractionRatio * 0.99 );", "vRefract[2] = refract( normalize( I ), nWorld, mRefractionRatio * 0.98 );", "vReflectionFactor = mFresnelBias + mFresnelScale * pow( 1.0 + dot( normalize( I ), nWorld ), mFresnelPower );", "gl_Position = projectionMatrix * mvPosition;", "}" ].join("\n") }, /* ------------------------------------------------------------------------- // Normal map shader // - Blinn-Phong // - normal + diffuse + specular + AO + displacement + reflection + shadow maps // - point and directional lights (use with "lights: true" material option) ------------------------------------------------------------------------- */ 'normal' : { uniforms: THREE.UniformsUtils.merge( [ THREE.UniformsLib[ "fog" ], THREE.UniformsLib[ "lights" ], THREE.UniformsLib[ "shadowmap" ], { "enableAO" : { type: "i", value: 0 }, "enableDiffuse" : { type: "i", value: 0 }, "enableSpecular" : { type: "i", value: 0 }, "enableReflection": { type: "i", value: 0 }, "enableDisplacement": { type: "i", value: 0 }, "tDiffuse" : { type: "t", value: 0, texture: null }, "tCube" : { type: "t", value: 1, texture: null }, "tNormal" : { type: "t", value: 2, texture: null }, "tSpecular" : { type: "t", value: 3, texture: null }, "tAO" : { type: "t", value: 4, texture: null }, "tDisplacement": { type: "t", value: 5, texture: null }, "uNormalScale": { type: "f", value: 1.0 }, "uDisplacementBias": { type: "f", value: 0.0 }, "uDisplacementScale": { type: "f", value: 1.0 }, "uDiffuseColor": { type: "c", value: new THREE.Color( 0xffffff ) }, "uSpecularColor": { type: "c", value: new THREE.Color( 0x111111 ) }, "uAmbientColor": { type: "c", value: new THREE.Color( 0xffffff ) }, "uShininess": { type: "f", value: 30 }, "uOpacity": { type: "f", value: 1 }, "useRefract": { type: "i", value: 0 }, "uRefractionRatio": { type: "f", value: 0.98 }, "uReflectivity": { type: "f", value: 0.5 }, "uOffset" : { type: "v2", value: new THREE.Vector2( 0, 0 ) }, "uRepeat" : { type: "v2", value: new THREE.Vector2( 1, 1 ) }, "wrapRGB" : { type: "v3", value: new THREE.Vector3( 1, 1, 1 ) } } ] ), fragmentShader: [ "uniform vec3 uAmbientColor;", "uniform vec3 uDiffuseColor;", "uniform vec3 uSpecularColor;", "uniform float uShininess;", "uniform float uOpacity;", "uniform bool enableDiffuse;", "uniform bool enableSpecular;", "uniform bool enableAO;", "uniform bool enableReflection;", "uniform sampler2D tDiffuse;", "uniform sampler2D tNormal;", "uniform sampler2D tSpecular;", "uniform sampler2D tAO;", "uniform samplerCube tCube;", "uniform float uNormalScale;", "uniform bool useRefract;", "uniform float uRefractionRatio;", "uniform float uReflectivity;", "varying vec3 vTangent;", "varying vec3 vBinormal;", "varying vec3 vNormal;", "varying vec2 vUv;", "uniform vec3 ambientLightColor;", "#if MAX_DIR_LIGHTS > 0", "uniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];", "uniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];", "#endif", "#if MAX_POINT_LIGHTS > 0", "uniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];", "uniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];", "uniform float pointLightDistance[ MAX_POINT_LIGHTS ];", "#endif", "#if MAX_SPOT_LIGHTS > 0", "uniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];", "uniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];", "uniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];", "uniform float spotLightAngle[ MAX_SPOT_LIGHTS ];", "uniform float spotLightExponent[ MAX_SPOT_LIGHTS ];", "uniform float spotLightDistance[ MAX_SPOT_LIGHTS ];", "#endif", "#ifdef WRAP_AROUND", "uniform vec3 wrapRGB;", "#endif", "varying vec3 vWorldPosition;", THREE.ShaderChunk[ "shadowmap_pars_fragment" ], THREE.ShaderChunk[ "fog_pars_fragment" ], "void main() {", "vec3 vViewPosition = cameraPosition - vWorldPosition;", "gl_FragColor = vec4( vec3( 1.0 ), uOpacity );", "vec3 specularTex = vec3( 1.0 );", "vec3 normalTex = texture2D( tNormal, vUv ).xyz * 2.0 - 1.0;", "normalTex.xy *= uNormalScale;", "normalTex = normalize( normalTex );", "if( enableDiffuse ) {", "#ifdef GAMMA_INPUT", "vec4 texelColor = texture2D( tDiffuse, vUv );", "texelColor.xyz *= texelColor.xyz;", "gl_FragColor = gl_FragColor * texelColor;", "#else", "gl_FragColor = gl_FragColor * texture2D( tDiffuse, vUv );", "#endif", "}", "if( enableAO ) {", "#ifdef GAMMA_INPUT", "vec4 aoColor = texture2D( tAO, vUv );", "aoColor.xyz *= aoColor.xyz;", "gl_FragColor.xyz = gl_FragColor.xyz * aoColor.xyz;", "#else", "gl_FragColor.xyz = gl_FragColor.xyz * texture2D( tAO, vUv ).xyz;", "#endif", "}", "if( enableSpecular )", "specularTex = texture2D( tSpecular, vUv ).xyz;", "mat3 tsb = mat3( normalize( vTangent ), normalize( vBinormal ), normalize( vNormal ) );", "vec3 finalNormal = tsb * normalTex;", "vec3 normal = normalize( finalNormal );", "vec3 viewPosition = normalize( vViewPosition );", // point lights "#if MAX_POINT_LIGHTS > 0", "vec3 pointDiffuse = vec3( 0.0 );", "vec3 pointSpecular = vec3( 0.0 );", "for ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {", "vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );", "vec3 pointVector = lPosition.xyz + vViewPosition.xyz;", "float pointDistance = 1.0;", "if ( pointLightDistance[ i ] > 0.0 )", "pointDistance = 1.0 - min( ( length( pointVector ) / pointLightDistance[ i ] ), 1.0 );", "pointVector = normalize( pointVector );", // diffuse "#ifdef WRAP_AROUND", "float pointDiffuseWeightFull = max( dot( normal, pointVector ), 0.0 );", "float pointDiffuseWeightHalf = max( 0.5 * dot( normal, pointVector ) + 0.5, 0.0 );", "vec3 pointDiffuseWeight = mix( vec3 ( pointDiffuseWeightFull ), vec3( pointDiffuseWeightHalf ), wrapRGB );", "#else", "float pointDiffuseWeight = max( dot( normal, pointVector ), 0.0 );", "#endif", "pointDiffuse += pointDistance * pointLightColor[ i ] * uDiffuseColor * pointDiffuseWeight;", // specular "vec3 pointHalfVector = normalize( pointVector + viewPosition );", "float pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );", "float pointSpecularWeight = specularTex.r * max( pow( pointDotNormalHalf, uShininess ), 0.0 );", "#ifdef PHYSICALLY_BASED_SHADING", // 2.0 => 2.0001 is hack to work around ANGLE bug "float specularNormalization = ( uShininess + 2.0001 ) / 8.0;", "vec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( pointVector, pointHalfVector ), 5.0 );", "pointSpecular += schlick * pointLightColor[ i ] * pointSpecularWeight * pointDiffuseWeight * pointDistance * specularNormalization;", "#else", "pointSpecular += pointDistance * pointLightColor[ i ] * uSpecularColor * pointSpecularWeight * pointDiffuseWeight;", "#endif", "}", "#endif", // spot lights "#if MAX_SPOT_LIGHTS > 0", "vec3 spotDiffuse = vec3( 0.0 );", "vec3 spotSpecular = vec3( 0.0 );", "for ( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {", "vec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );", "vec3 spotVector = lPosition.xyz + vViewPosition.xyz;", "float spotDistance = 1.0;", "if ( spotLightDistance[ i ] > 0.0 )", "spotDistance = 1.0 - min( ( length( spotVector ) / spotLightDistance[ i ] ), 1.0 );", "spotVector = normalize( spotVector );", "float spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - vWorldPosition ) );", "if ( spotEffect > spotLightAngle[ i ] ) {", "spotEffect = pow( spotEffect, spotLightExponent[ i ] );", // diffuse "#ifdef WRAP_AROUND", "float spotDiffuseWeightFull = max( dot( normal, spotVector ), 0.0 );", "float spotDiffuseWeightHalf = max( 0.5 * dot( normal, spotVector ) + 0.5, 0.0 );", "vec3 spotDiffuseWeight = mix( vec3 ( spotDiffuseWeightFull ), vec3( spotDiffuseWeightHalf ), wrapRGB );", "#else", "float spotDiffuseWeight = max( dot( normal, spotVector ), 0.0 );", "#endif", "spotDiffuse += spotDistance * spotLightColor[ i ] * uDiffuseColor * spotDiffuseWeight * spotEffect;", // specular "vec3 spotHalfVector = normalize( spotVector + viewPosition );", "float spotDotNormalHalf = max( dot( normal, spotHalfVector ), 0.0 );", "float spotSpecularWeight = specularTex.r * max( pow( spotDotNormalHalf, uShininess ), 0.0 );", "#ifdef PHYSICALLY_BASED_SHADING", // 2.0 => 2.0001 is hack to work around ANGLE bug "float specularNormalization = ( uShininess + 2.0001 ) / 8.0;", "vec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( spotVector, spotHalfVector ), 5.0 );", "spotSpecular += schlick * spotLightColor[ i ] * spotSpecularWeight * spotDiffuseWeight * spotDistance * specularNormalization * spotEffect;", "#else", "spotSpecular += spotDistance * spotLightColor[ i ] * uSpecularColor * spotSpecularWeight * spotDiffuseWeight * spotEffect;", "#endif", "}", "}", "#endif", // directional lights "#if MAX_DIR_LIGHTS > 0", "vec3 dirDiffuse = vec3( 0.0 );", "vec3 dirSpecular = vec3( 0.0 );", "for( int i = 0; i < MAX_DIR_LIGHTS; i++ ) {", "vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );", "vec3 dirVector = normalize( lDirection.xyz );", // diffuse "#ifdef WRAP_AROUND", "float directionalLightWeightingFull = max( dot( normal, dirVector ), 0.0 );", "float directionalLightWeightingHalf = max( 0.5 * dot( normal, dirVector ) + 0.5, 0.0 );", "vec3 dirDiffuseWeight = mix( vec3( directionalLightWeightingFull ), vec3( directionalLightWeightingHalf ), wrapRGB );", "#else", "float dirDiffuseWeight = max( dot( normal, dirVector ), 0.0 );", "#endif", "dirDiffuse += directionalLightColor[ i ] * uDiffuseColor * dirDiffuseWeight;", // specular "vec3 dirHalfVector = normalize( dirVector + viewPosition );", "float dirDotNormalHalf = max( dot( normal, dirHalfVector ), 0.0 );", "float dirSpecularWeight = specularTex.r * max( pow( dirDotNormalHalf, uShininess ), 0.0 );", "#ifdef PHYSICALLY_BASED_SHADING", // 2.0 => 2.0001 is hack to work around ANGLE bug "float specularNormalization = ( uShininess + 2.0001 ) / 8.0;", "vec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( dirVector, dirHalfVector ), 5.0 );", "dirSpecular += schlick * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization;", "#else", "dirSpecular += directionalLightColor[ i ] * uSpecularColor * dirSpecularWeight * dirDiffuseWeight;", "#endif", "}", "#endif", // all lights contribution summation "vec3 totalDiffuse = vec3( 0.0 );", "vec3 totalSpecular = vec3( 0.0 );", "#if MAX_DIR_LIGHTS > 0", "totalDiffuse += dirDiffuse;", "totalSpecular += dirSpecular;", "#endif", "#if MAX_POINT_LIGHTS > 0", "totalDiffuse += pointDiffuse;", "totalSpecular += pointSpecular;", "#endif", "#if MAX_SPOT_LIGHTS > 0", "totalDiffuse += spotDiffuse;", "totalSpecular += spotSpecular;", "#endif", "#ifdef METAL", "gl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor + totalSpecular );", "#else", "gl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor ) + totalSpecular;", "#endif", "if ( enableReflection ) {", "vec3 vReflect;", "vec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );", "if ( useRefract ) {", "vReflect = refract( cameraToVertex, normal, uRefractionRatio );", "} else {", "vReflect = reflect( cameraToVertex, normal );", "}", "vec4 cubeColor = textureCube( tCube, vec3( -vReflect.x, vReflect.yz ) );", "#ifdef GAMMA_INPUT", "cubeColor.xyz *= cubeColor.xyz;", "#endif", "gl_FragColor.xyz = mix( gl_FragColor.xyz, cubeColor.xyz, specularTex.r * uReflectivity );", "}", THREE.ShaderChunk[ "shadowmap_fragment" ], THREE.ShaderChunk[ "linear_to_gamma_fragment" ], THREE.ShaderChunk[ "fog_fragment" ], "}" ].join("\n"), vertexShader: [ "attribute vec4 tangent;", "uniform vec2 uOffset;", "uniform vec2 uRepeat;", "uniform bool enableDisplacement;", "#ifdef VERTEX_TEXTURES", "uniform sampler2D tDisplacement;", "uniform float uDisplacementScale;", "uniform float uDisplacementBias;", "#endif", "varying vec3 vTangent;", "varying vec3 vBinormal;", "varying vec3 vNormal;", "varying vec2 vUv;", "varying vec3 vWorldPosition;", THREE.ShaderChunk[ "skinning_pars_vertex" ], THREE.ShaderChunk[ "shadowmap_pars_vertex" ], "void main() {", THREE.ShaderChunk[ "skinbase_vertex" ], THREE.ShaderChunk[ "skinnormal_vertex" ], // normal, tangent and binormal vectors "#ifdef USE_SKINNING", "vNormal = normalMatrix * skinnedNormal.xyz;", "vec4 skinnedTangent = skinMatrix * vec4( tangent.xyz, 0.0 );", "vTangent = normalMatrix * skinnedTangent.xyz;", "#else", "vNormal = normalMatrix * normal;", "vTangent = normalMatrix * tangent.xyz;", "#endif", "vBinormal = cross( vNormal, vTangent ) * tangent.w;", "vUv = uv * uRepeat + uOffset;", // displacement mapping "vec3 displacedPosition;", "#ifdef VERTEX_TEXTURES", "if ( enableDisplacement ) {", "vec3 dv = texture2D( tDisplacement, uv ).xyz;", "float df = uDisplacementScale * dv.x + uDisplacementBias;", "displacedPosition = position + normalize( normal ) * df;", "} else {", "#ifdef USE_SKINNING", "vec4 skinned = boneMatX * skinVertexA * skinWeight.x;", "skinned += boneMatY * skinVertexB * skinWeight.y;", "displacedPosition = skinned.xyz;", "#else", "displacedPosition = position;", "#endif", "}", "#else", "#ifdef USE_SKINNING", "vec4 skinned = boneMatX * skinVertexA * skinWeight.x;", "skinned += boneMatY * skinVertexB * skinWeight.y;", "displacedPosition = skinned.xyz;", "#else", "displacedPosition = position;", "#endif", "#endif", // "vec4 mvPosition = modelViewMatrix * vec4( displacedPosition, 1.0 );", "vec4 wPosition = modelMatrix * vec4( displacedPosition, 1.0 );", "gl_Position = projectionMatrix * mvPosition;", // "vWorldPosition = wPosition.xyz;", // shadows "#ifdef USE_SHADOWMAP", "for( int i = 0; i < MAX_SHADOWS; i ++ ) {", "vShadowCoord[ i ] = shadowMatrix[ i ] * wPosition;", "}", "#endif", "}" ].join("\n") }, /* ------------------------------------------------------------------------- // Cube map shader ------------------------------------------------------------------------- */ 'cube': { uniforms: { "tCube": { type: "t", value: 1, texture: null }, "tFlip": { type: "f", value: -1 } }, vertexShader: [ "varying vec3 vViewPosition;", "void main() {", "vec4 mPosition = modelMatrix * vec4( position, 1.0 );", "vViewPosition = cameraPosition - mPosition.xyz;", "gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );", "}" ].join("\n"), fragmentShader: [ "uniform samplerCube tCube;", "uniform float tFlip;", "varying vec3 vViewPosition;", "void main() {", "vec3 wPos = cameraPosition - vViewPosition;", "gl_FragColor = textureCube( tCube, vec3( tFlip * wPos.x, wPos.yz ) );", "}" ].join("\n") } } }; };