mirror of
https://github.com/tengge1/ShadowEditor.git
synced 2026-01-25 15:08:11 +00:00
687 lines
18 KiB
JavaScript
687 lines
18 KiB
JavaScript
/**
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* @author alteredq / http://alteredqualia.com/
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*
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*/
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/* ------------------------------------------------------------------------------------------
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// Basic skin shader
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// - per-pixel Blinn-Phong diffuse term mixed with half-Lambert wrap-around term (per color component)
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// - physically based specular term (Kelemen/Szirmay-Kalos specular reflectance)
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//
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// - diffuse map
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// - bump map
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// - specular map
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// - point, directional and hemisphere lights (use with "lights: true" material option)
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// - fog (use with "fog: true" material option)
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//
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// ------------------------------------------------------------------------------------------ */
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THREE.SkinShaderBasic = {
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uniforms: THREE.UniformsUtils.merge( [
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THREE.UniformsLib[ "fog" ],
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THREE.UniformsLib[ "lights" ],
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{
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"enableBump": { value: 0 },
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"enableSpecular": { value: 0 },
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"tDiffuse": { value: null },
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"tBeckmann": { value: null },
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"diffuse": { value: new THREE.Color( 0xeeeeee ) },
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"specular": { value: new THREE.Color( 0x111111 ) },
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"opacity": { value: 1 },
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"uRoughness": { value: 0.15 },
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"uSpecularBrightness": { value: 0.75 },
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"bumpMap": { value: null },
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"bumpScale": { value: 1 },
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"specularMap": { value: null },
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"offsetRepeat": { value: new THREE.Vector4( 0, 0, 1, 1 ) },
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"uWrapRGB": { value: new THREE.Vector3( 0.75, 0.375, 0.1875 ) }
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}
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] ),
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vertexShader: [
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"uniform vec4 offsetRepeat;",
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"varying vec3 vNormal;",
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"varying vec2 vUv;",
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"varying vec3 vViewPosition;",
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THREE.ShaderChunk[ "common" ],
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THREE.ShaderChunk[ "lights_pars_begin" ],
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THREE.ShaderChunk[ "fog_pars_vertex" ],
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"void main() {",
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" vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
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" vec4 worldPosition = modelMatrix * vec4( position, 1.0 );",
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" vViewPosition = -mvPosition.xyz;",
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" vNormal = normalize( normalMatrix * normal );",
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" vUv = uv * offsetRepeat.zw + offsetRepeat.xy;",
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" gl_Position = projectionMatrix * mvPosition;",
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THREE.ShaderChunk[ "fog_vertex" ],
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"}"
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].join( "\n" ),
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fragmentShader: [
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"#define USE_BUMPMAP",
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"uniform bool enableBump;",
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"uniform bool enableSpecular;",
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"uniform vec3 diffuse;",
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"uniform vec3 specular;",
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"uniform float opacity;",
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"uniform float uRoughness;",
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"uniform float uSpecularBrightness;",
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"uniform vec3 uWrapRGB;",
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"uniform sampler2D tDiffuse;",
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"uniform sampler2D tBeckmann;",
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"uniform sampler2D specularMap;",
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"varying vec3 vNormal;",
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"varying vec2 vUv;",
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"varying vec3 vViewPosition;",
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THREE.ShaderChunk[ "common" ],
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THREE.ShaderChunk[ "bsdfs" ],
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THREE.ShaderChunk[ "packing" ],
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THREE.ShaderChunk[ "lights_pars_begin" ],
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THREE.ShaderChunk[ "fog_pars_fragment" ],
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THREE.ShaderChunk[ "bumpmap_pars_fragment" ],
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// Fresnel term
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"float fresnelReflectance( vec3 H, vec3 V, float F0 ) {",
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" float base = 1.0 - dot( V, H );",
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" float exponential = pow( base, 5.0 );",
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" return exponential + F0 * ( 1.0 - exponential );",
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"}",
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// Kelemen/Szirmay-Kalos specular BRDF
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"float KS_Skin_Specular( vec3 N,", // Bumped surface normal
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" vec3 L,", // Points to light
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" vec3 V,", // Points to eye
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" float m,", // Roughness
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" float rho_s", // Specular brightness
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" ) {",
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" float result = 0.0;",
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" float ndotl = dot( N, L );",
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" if( ndotl > 0.0 ) {",
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" vec3 h = L + V;", // Unnormalized half-way vector
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" vec3 H = normalize( h );",
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" float ndoth = dot( N, H );",
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" float PH = pow( 2.0 * texture2D( tBeckmann, vec2( ndoth, m ) ).x, 10.0 );",
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" float F = fresnelReflectance( H, V, 0.028 );",
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" float frSpec = max( PH * F / dot( h, h ), 0.0 );",
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" result = ndotl * rho_s * frSpec;", // BRDF * dot(N,L) * rho_s
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" }",
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" return result;",
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"}",
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"void main() {",
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" vec3 outgoingLight = vec3( 0.0 );", // outgoing light does not have an alpha, the surface does
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" vec4 diffuseColor = vec4( diffuse, opacity );",
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" vec4 colDiffuse = texture2D( tDiffuse, vUv );",
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" colDiffuse.rgb *= colDiffuse.rgb;",
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" diffuseColor = diffuseColor * colDiffuse;",
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" vec3 normal = normalize( vNormal );",
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" vec3 viewerDirection = normalize( vViewPosition );",
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" float specularStrength;",
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" if ( enableSpecular ) {",
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" vec4 texelSpecular = texture2D( specularMap, vUv );",
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" specularStrength = texelSpecular.r;",
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" } else {",
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" specularStrength = 1.0;",
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" }",
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" #ifdef USE_BUMPMAP",
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" if ( enableBump ) normal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );",
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" #endif",
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// point lights
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" vec3 totalSpecularLight = vec3( 0.0 );",
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" vec3 totalDiffuseLight = vec3( 0.0 );",
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" #if NUM_POINT_LIGHTS > 0",
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" for ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {",
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" vec3 lVector = pointLights[ i ].position + vViewPosition.xyz;",
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" float attenuation = calcLightAttenuation( length( lVector ), pointLights[ i ].distance, pointLights[ i ].decay );",
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" lVector = normalize( lVector );",
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" float pointDiffuseWeightFull = max( dot( normal, lVector ), 0.0 );",
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" float pointDiffuseWeightHalf = max( 0.5 * dot( normal, lVector ) + 0.5, 0.0 );",
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" vec3 pointDiffuseWeight = mix( vec3 ( pointDiffuseWeightFull ), vec3( pointDiffuseWeightHalf ), uWrapRGB );",
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" float pointSpecularWeight = KS_Skin_Specular( normal, lVector, viewerDirection, uRoughness, uSpecularBrightness );",
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" totalDiffuseLight += pointLight[ i ].color * ( pointDiffuseWeight * attenuation );",
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" totalSpecularLight += pointLight[ i ].color * specular * ( pointSpecularWeight * specularStrength * attenuation );",
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" }",
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" #endif",
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// directional lights
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" #if NUM_DIR_LIGHTS > 0",
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" for( int i = 0; i < NUM_DIR_LIGHTS; i++ ) {",
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" vec3 dirVector = directionalLights[ i ].direction;",
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" float dirDiffuseWeightFull = max( dot( normal, dirVector ), 0.0 );",
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" float dirDiffuseWeightHalf = max( 0.5 * dot( normal, dirVector ) + 0.5, 0.0 );",
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" vec3 dirDiffuseWeight = mix( vec3 ( dirDiffuseWeightFull ), vec3( dirDiffuseWeightHalf ), uWrapRGB );",
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" float dirSpecularWeight = KS_Skin_Specular( normal, dirVector, viewerDirection, uRoughness, uSpecularBrightness );",
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" totalDiffuseLight += directionalLights[ i ].color * dirDiffuseWeight;",
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" totalSpecularLight += directionalLights[ i ].color * ( dirSpecularWeight * specularStrength );",
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" }",
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" #endif",
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// hemisphere lights
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" #if NUM_HEMI_LIGHTS > 0",
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" for ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {",
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" vec3 lVector = hemisphereLightDirection[ i ];",
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" float dotProduct = dot( normal, lVector );",
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" float hemiDiffuseWeight = 0.5 * dotProduct + 0.5;",
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" totalDiffuseLight += mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );",
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// specular (sky light)
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" float hemiSpecularWeight = 0.0;",
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" hemiSpecularWeight += KS_Skin_Specular( normal, lVector, viewerDirection, uRoughness, uSpecularBrightness );",
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// specular (ground light)
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" vec3 lVectorGround = -lVector;",
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" hemiSpecularWeight += KS_Skin_Specular( normal, lVectorGround, viewerDirection, uRoughness, uSpecularBrightness );",
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" vec3 hemiSpecularColor = mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );",
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" totalSpecularLight += hemiSpecularColor * specular * ( hemiSpecularWeight * specularStrength );",
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" }",
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" #endif",
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" outgoingLight += diffuseColor.xyz * ( totalDiffuseLight + ambientLightColor * diffuse ) + totalSpecularLight;",
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" gl_FragColor = linearToOutputTexel( vec4( outgoingLight, diffuseColor.a ) );", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects
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THREE.ShaderChunk[ "fog_fragment" ],
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"}"
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].join( "\n" )
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};
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/* ------------------------------------------------------------------------------------------
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// Skin shader
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// - Blinn-Phong diffuse term (using normal + diffuse maps)
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// - subsurface scattering approximation by four blur layers
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// - physically based specular term (Kelemen/Szirmay-Kalos specular reflectance)
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//
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// - point and directional lights (use with "lights: true" material option)
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//
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// - based on Nvidia Advanced Skin Rendering GDC 2007 presentation
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// and GPU Gems 3 Chapter 14. Advanced Techniques for Realistic Real-Time Skin Rendering
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//
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// http://developer.download.nvidia.com/presentations/2007/gdc/Advanced_Skin.pdf
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// http://http.developer.nvidia.com/GPUGems3/gpugems3_ch14.html
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// ------------------------------------------------------------------------------------------ */
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THREE.SkinShaderAdvanced = {
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uniforms: THREE.UniformsUtils.merge( [
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THREE.UniformsLib[ "fog" ],
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THREE.UniformsLib[ "lights" ],
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{
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"passID": { value: 0 },
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"tDiffuse": { value: null },
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"tNormal": { value: null },
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"tBlur1": { value: null },
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"tBlur2": { value: null },
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"tBlur3": { value: null },
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"tBlur4": { value: null },
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"tBeckmann": { value: null },
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"uNormalScale": { value: 1.0 },
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"diffuse": { value: new THREE.Color( 0xeeeeee ) },
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"specular": { value: new THREE.Color( 0x111111 ) },
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"opacity": { value: 1 },
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"uRoughness": { value: 0.15 },
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"uSpecularBrightness": { value: 0.75 }
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}
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] ),
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vertexShader: [
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"#ifdef VERTEX_TEXTURES",
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" uniform sampler2D tDisplacement;",
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" uniform float uDisplacementScale;",
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" uniform float uDisplacementBias;",
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"#endif",
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"varying vec3 vNormal;",
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"varying vec2 vUv;",
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"varying vec3 vViewPosition;",
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THREE.ShaderChunk[ "common" ],
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THREE.ShaderChunk[ "fog_pars_vertex" ],
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"void main() {",
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" vec4 worldPosition = modelMatrix * vec4( position, 1.0 );",
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" vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
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" vViewPosition = -mvPosition.xyz;",
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" vNormal = normalize( normalMatrix * normal );",
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" vUv = uv;",
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// displacement mapping
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" #ifdef VERTEX_TEXTURES",
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" vec3 dv = texture2D( tDisplacement, uv ).xyz;",
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" float df = uDisplacementScale * dv.x + uDisplacementBias;",
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" vec4 displacedPosition = vec4( vNormal.xyz * df, 0.0 ) + mvPosition;",
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" gl_Position = projectionMatrix * displacedPosition;",
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" #else",
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" gl_Position = projectionMatrix * mvPosition;",
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" #endif",
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THREE.ShaderChunk[ "fog_vertex" ],
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"}",
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].join( "\n" ),
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vertexShaderUV: [
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"varying vec3 vNormal;",
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"varying vec2 vUv;",
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"varying vec3 vViewPosition;",
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THREE.ShaderChunk[ "common" ],
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"void main() {",
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" vec4 worldPosition = modelMatrix * vec4( position, 1.0 );",
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" vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
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" vViewPosition = -mvPosition.xyz;",
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" vNormal = normalize( normalMatrix * normal );",
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" vUv = uv;",
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" gl_Position = vec4( uv.x * 2.0 - 1.0, uv.y * 2.0 - 1.0, 0.0, 1.0 );",
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"}"
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].join( "\n" ),
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fragmentShader: [
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"uniform vec3 diffuse;",
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"uniform vec3 specular;",
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"uniform float opacity;",
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"uniform float uRoughness;",
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"uniform float uSpecularBrightness;",
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"uniform int passID;",
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"uniform sampler2D tDiffuse;",
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"uniform sampler2D tNormal;",
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"uniform sampler2D tBlur1;",
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"uniform sampler2D tBlur2;",
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"uniform sampler2D tBlur3;",
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"uniform sampler2D tBlur4;",
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"uniform sampler2D tBeckmann;",
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"uniform float uNormalScale;",
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"varying vec3 vNormal;",
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"varying vec2 vUv;",
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"varying vec3 vViewPosition;",
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THREE.ShaderChunk[ "common" ],
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THREE.ShaderChunk[ "lights_pars_begin" ],
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THREE.ShaderChunk[ "fog_pars_fragment" ],
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"float fresnelReflectance( vec3 H, vec3 V, float F0 ) {",
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" float base = 1.0 - dot( V, H );",
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" float exponential = pow( base, 5.0 );",
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" return exponential + F0 * ( 1.0 - exponential );",
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"}",
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// Kelemen/Szirmay-Kalos specular BRDF
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"float KS_Skin_Specular( vec3 N,", // Bumped surface normal
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" vec3 L,", // Points to light
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" vec3 V,", // Points to eye
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" float m,", // Roughness
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" float rho_s", // Specular brightness
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" ) {",
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" float result = 0.0;",
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" float ndotl = dot( N, L );",
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" if( ndotl > 0.0 ) {",
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" vec3 h = L + V;", // Unnormalized half-way vector
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" vec3 H = normalize( h );",
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" float ndoth = dot( N, H );",
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" float PH = pow( 2.0 * texture2D( tBeckmann, vec2( ndoth, m ) ).x, 10.0 );",
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" float F = fresnelReflectance( H, V, 0.028 );",
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" float frSpec = max( PH * F / dot( h, h ), 0.0 );",
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" result = ndotl * rho_s * frSpec;", // BRDF * dot(N,L) * rho_s
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" }",
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" return result;",
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"}",
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"void main() {",
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" vec3 outgoingLight = vec3( 0.0 );", // outgoing light does not have an alpha, the surface does
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" vec4 diffuseColor = vec4( diffuse, opacity );",
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" vec4 mSpecular = vec4( specular, opacity );",
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" vec4 colDiffuse = texture2D( tDiffuse, vUv );",
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" colDiffuse *= colDiffuse;",
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" diffuseColor *= colDiffuse;",
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// normal mapping
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" vec4 posAndU = vec4( -vViewPosition, vUv.x );",
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" vec4 posAndU_dx = dFdx( posAndU ), posAndU_dy = dFdy( posAndU );",
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" vec3 tangent = posAndU_dx.w * posAndU_dx.xyz + posAndU_dy.w * posAndU_dy.xyz;",
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" vec3 normal = normalize( vNormal );",
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" vec3 binormal = normalize( cross( tangent, normal ) );",
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" tangent = cross( normal, binormal );", // no normalization required
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" mat3 tsb = mat3( tangent, binormal, normal );",
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" vec3 normalTex = texture2D( tNormal, vUv ).xyz * 2.0 - 1.0;",
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" normalTex.xy *= uNormalScale;",
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" normalTex = normalize( normalTex );",
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" vec3 finalNormal = tsb * normalTex;",
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" normal = normalize( finalNormal );",
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" vec3 viewerDirection = normalize( vViewPosition );",
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// point lights
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" vec3 totalDiffuseLight = vec3( 0.0 );",
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" vec3 totalSpecularLight = vec3( 0.0 );",
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" #if NUM_POINT_LIGHTS > 0",
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" for ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {",
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" vec3 pointVector = normalize( pointLights[ i ].direction );",
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" float attenuation = calcLightAttenuation( length( lVector ), pointLights[ i ].distance, pointLights[ i ].decay );",
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" float pointDiffuseWeight = max( dot( normal, pointVector ), 0.0 );",
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" totalDiffuseLight += pointLightColor[ i ] * ( pointDiffuseWeight * attenuation );",
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" if ( passID == 1 ) {",
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" float pointSpecularWeight = KS_Skin_Specular( normal, pointVector, viewerDirection, uRoughness, uSpecularBrightness );",
|
|
|
|
" totalSpecularLight += pointLightColor[ i ] * mSpecular.xyz * ( pointSpecularWeight * attenuation );",
|
|
|
|
" }",
|
|
|
|
" }",
|
|
|
|
" #endif",
|
|
|
|
// directional lights
|
|
|
|
" #if NUM_DIR_LIGHTS > 0",
|
|
|
|
" for( int i = 0; i < NUM_DIR_LIGHTS; i++ ) {",
|
|
|
|
" vec3 dirVector = directionalLights[ i ].direction;",
|
|
|
|
" float dirDiffuseWeight = max( dot( normal, dirVector ), 0.0 );",
|
|
|
|
|
|
" totalDiffuseLight += directionalLights[ i ].color * dirDiffuseWeight;",
|
|
|
|
" if ( passID == 1 ) {",
|
|
|
|
" float dirSpecularWeight = KS_Skin_Specular( normal, dirVector, viewerDirection, uRoughness, uSpecularBrightness );",
|
|
|
|
" totalSpecularLight += directionalLights[ i ].color * mSpecular.xyz * dirSpecularWeight;",
|
|
|
|
" }",
|
|
|
|
" }",
|
|
|
|
" #endif",
|
|
|
|
" outgoingLight += diffuseColor.rgb * ( totalDiffuseLight + totalSpecularLight );",
|
|
|
|
" if ( passID == 0 ) {",
|
|
|
|
" outgoingLight = sqrt( outgoingLight );",
|
|
|
|
" } else if ( passID == 1 ) {",
|
|
|
|
//"#define VERSION1",
|
|
|
|
" #ifdef VERSION1",
|
|
|
|
" vec3 nonblurColor = sqrt(outgoingLight );",
|
|
|
|
" #else",
|
|
|
|
" vec3 nonblurColor = outgoingLight;",
|
|
|
|
" #endif",
|
|
|
|
" vec3 blur1Color = texture2D( tBlur1, vUv ).xyz;",
|
|
" vec3 blur2Color = texture2D( tBlur2, vUv ).xyz;",
|
|
" vec3 blur3Color = texture2D( tBlur3, vUv ).xyz;",
|
|
" vec3 blur4Color = texture2D( tBlur4, vUv ).xyz;",
|
|
|
|
|
|
//"gl_FragColor = vec4( blur1Color, gl_FragColor.w );",
|
|
|
|
//"gl_FragColor = vec4( vec3( 0.22, 0.5, 0.7 ) * nonblurColor + vec3( 0.2, 0.5, 0.3 ) * blur1Color + vec3( 0.58, 0.0, 0.0 ) * blur2Color, gl_FragColor.w );",
|
|
|
|
//"gl_FragColor = vec4( vec3( 0.25, 0.6, 0.8 ) * nonblurColor + vec3( 0.15, 0.25, 0.2 ) * blur1Color + vec3( 0.15, 0.15, 0.0 ) * blur2Color + vec3( 0.45, 0.0, 0.0 ) * blur3Color, gl_FragColor.w );",
|
|
|
|
" outgoingLight = vec3( vec3( 0.22, 0.437, 0.635 ) * nonblurColor + ",
|
|
" vec3( 0.101, 0.355, 0.365 ) * blur1Color + ",
|
|
" vec3( 0.119, 0.208, 0.0 ) * blur2Color + ",
|
|
" vec3( 0.114, 0.0, 0.0 ) * blur3Color + ",
|
|
" vec3( 0.444, 0.0, 0.0 ) * blur4Color );",
|
|
|
|
" outgoingLight *= sqrt( colDiffuse.xyz );",
|
|
|
|
" outgoingLight += ambientLightColor * diffuse * colDiffuse.xyz + totalSpecularLight;",
|
|
|
|
" #ifndef VERSION1",
|
|
|
|
" outgoingLight = sqrt( outgoingLight );",
|
|
|
|
" #endif",
|
|
|
|
" }",
|
|
|
|
" gl_FragColor = vec4( outgoingLight, diffuseColor.a );", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects
|
|
|
|
THREE.ShaderChunk[ "fog_fragment" ],
|
|
|
|
"}"
|
|
|
|
].join( "\n" )
|
|
|
|
};
|
|
|
|
/* ------------------------------------------------------------------------------------------
|
|
// Beckmann distribution function
|
|
// - to be used in specular term of skin shader
|
|
// - render a screen-aligned quad to precompute a 512 x 512 texture
|
|
//
|
|
// - from http://developer.nvidia.com/node/171
|
|
------------------------------------------------------------------------------------------ */
|
|
|
|
THREE.SkinShaderBeckmann = {
|
|
|
|
uniforms: {},
|
|
|
|
vertexShader: [
|
|
|
|
"varying vec2 vUv;",
|
|
|
|
"void main() {",
|
|
|
|
" vUv = uv;",
|
|
" gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
|
|
|
|
"}"
|
|
|
|
].join( "\n" ),
|
|
|
|
fragmentShader: [
|
|
|
|
"varying vec2 vUv;",
|
|
|
|
"float PHBeckmann( float ndoth, float m ) {",
|
|
|
|
" float alpha = acos( ndoth );",
|
|
" float ta = tan( alpha );",
|
|
|
|
" float val = 1.0 / ( m * m * pow( ndoth, 4.0 ) ) * exp( -( ta * ta ) / ( m * m ) );",
|
|
" return val;",
|
|
|
|
"}",
|
|
|
|
"float KSTextureCompute( vec2 tex ) {",
|
|
|
|
// Scale the value to fit within [0,1] invert upon lookup.
|
|
|
|
" return 0.5 * pow( PHBeckmann( tex.x, tex.y ), 0.1 );",
|
|
|
|
"}",
|
|
|
|
"void main() {",
|
|
|
|
" float x = KSTextureCompute( vUv );",
|
|
|
|
" gl_FragColor = vec4( x, x, x, 1.0 );",
|
|
|
|
"}"
|
|
|
|
].join( "\n" )
|
|
|
|
};
|