src/viewer/scene/PerformanceModel/lib/layers/trianglesInstancing/renderers/TrianglesInstancingColorQualityRenderer.js
import {Program} from "../../../../../webgl/Program.js";
import {math} from "../../../../../math/math.js";
import {createRTCViewMat, getPlaneRTCPos} from "../../../../../math/rtcCoords.js";
import {WEBGL_INFO} from "../../../../../webglInfo.js";
const tempVec4 = math.vec4();
const tempVec3a = math.vec3();
const TEXTURE_DECODE_FUNCS = {
"linear": "linearToLinear",
"sRGB": "sRGBToLinear",
"gamma": "gammaToLinear"
};
/**
* @private
*/
class TrianglesInstancingColorQualityRenderer {
constructor(scene, withSAO) {
this._scene = scene;
this._withSAO = withSAO;
this._hash = this._getHash();
this._allocate();
}
getValid() {
return this._hash === this._getHash();
};
_getHash() {
const scene = this._scene;
return [scene.gammaOutput, scene._lightsState.getHash(), scene._sectionPlanesState.getHash(), (this._withSAO ? "sao" : "nosao")].join(";");
}
drawLayer(frameCtx, instancingLayer, renderPass) {
const model = instancingLayer.model;
const scene = this._scene;
const camera = scene.camera;
const gl = scene.canvas.gl;
const state = instancingLayer._state;
const instanceExt = this._instanceExt;
const origin = instancingLayer._state.origin;
if (!this._program) {
this._allocate();
if (this.errors) {
return;
}
}
if (frameCtx.lastProgramId !== this._program.id) {
frameCtx.lastProgramId = this._program.id;
this._bindProgram(frameCtx);
}
gl.uniform1i(this._uRenderPass, renderPass);
gl.uniformMatrix4fv(this._uViewMatrix, false, (origin) ? createRTCViewMat(camera.viewMatrix, origin) : camera.viewMatrix);
gl.uniformMatrix4fv(this._uViewNormalMatrix, false, camera.viewNormalMatrix);
gl.uniformMatrix4fv(this._uWorldMatrix, false, model.worldMatrix);
gl.uniformMatrix4fv(this._uWorldNormalMatrix, false, model.worldNormalMatrix);
const numSectionPlanes = scene._sectionPlanesState.sectionPlanes.length;
if (numSectionPlanes > 0) {
const sectionPlanes = scene._sectionPlanesState.sectionPlanes;
const baseIndex = instancingLayer.layerIndex * numSectionPlanes;
const renderFlags = model.renderFlags;
for (let sectionPlaneIndex = 0; sectionPlaneIndex < numSectionPlanes; sectionPlaneIndex++) {
const sectionPlaneUniforms = this._uSectionPlanes[sectionPlaneIndex];
if (sectionPlaneUniforms) {
const active = renderFlags.sectionPlanesActivePerLayer[baseIndex + sectionPlaneIndex];
gl.uniform1i(sectionPlaneUniforms.active, active ? 1 : 0);
if (active) {
const sectionPlane = sectionPlanes[sectionPlaneIndex];
if (origin) {
const rtcSectionPlanePos = getPlaneRTCPos(sectionPlane.dist, sectionPlane.dir, origin, tempVec3a);
gl.uniform3fv(sectionPlaneUniforms.pos, rtcSectionPlanePos);
} else {
gl.uniform3fv(sectionPlaneUniforms.pos, sectionPlane.pos);
}
gl.uniform3fv(sectionPlaneUniforms.dir, sectionPlane.dir);
}
}
}
}
gl.uniformMatrix4fv(this._uPositionsDecodeMatrix, false, instancingLayer._state.positionsDecodeMatrix);
this._aModelMatrixCol0.bindArrayBuffer(state.modelMatrixCol0Buf);
this._aModelMatrixCol1.bindArrayBuffer(state.modelMatrixCol1Buf);
this._aModelMatrixCol2.bindArrayBuffer(state.modelMatrixCol2Buf);
instanceExt.vertexAttribDivisorANGLE(this._aModelMatrixCol0.location, 1);
instanceExt.vertexAttribDivisorANGLE(this._aModelMatrixCol1.location, 1);
instanceExt.vertexAttribDivisorANGLE(this._aModelMatrixCol2.location, 1);
this._aModelNormalMatrixCol0.bindArrayBuffer(state.modelNormalMatrixCol0Buf);
this._aModelNormalMatrixCol1.bindArrayBuffer(state.modelNormalMatrixCol1Buf);
this._aModelNormalMatrixCol2.bindArrayBuffer(state.modelNormalMatrixCol2Buf);
instanceExt.vertexAttribDivisorANGLE(this._aModelNormalMatrixCol0.location, 1);
instanceExt.vertexAttribDivisorANGLE(this._aModelNormalMatrixCol1.location, 1);
instanceExt.vertexAttribDivisorANGLE(this._aModelNormalMatrixCol2.location, 1);
this._aPosition.bindArrayBuffer(state.positionsBuf);
this._aNormal.bindArrayBuffer(state.normalsBuf);
this._aColor.bindArrayBuffer(state.colorsBuf);
instanceExt.vertexAttribDivisorANGLE(this._aColor.location, 1);
this._aMetallicRoughness.bindArrayBuffer(state.metallicRoughnessBuf);
instanceExt.vertexAttribDivisorANGLE(this._aMetallicRoughness.location, 1);
this._aFlags.bindArrayBuffer(state.flagsBuf);
instanceExt.vertexAttribDivisorANGLE(this._aFlags.location, 1);
if (this._aFlags2) {
this._aFlags2.bindArrayBuffer(state.flags2Buf);
instanceExt.vertexAttribDivisorANGLE(this._aFlags2.location, 1);
}
if (this._aOffset) {
this._aOffset.bindArrayBuffer(state.offsetsBuf);
instanceExt.vertexAttribDivisorANGLE(this._aOffset.location, 1);
}
state.indicesBuf.bind();
instanceExt.drawElementsInstancedANGLE(gl.TRIANGLES, state.indicesBuf.numItems, state.indicesBuf.itemType, 0, state.numInstances);
frameCtx.drawElements++;
instanceExt.vertexAttribDivisorANGLE(this._aModelMatrixCol0.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aModelMatrixCol1.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aModelMatrixCol2.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aModelNormalMatrixCol0.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aModelNormalMatrixCol1.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aModelNormalMatrixCol2.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aColor.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aMetallicRoughness.location, 0);
instanceExt.vertexAttribDivisorANGLE(this._aFlags.location, 0);
if (this._aFlags2) { // Won't be in shader when not clipping
instanceExt.vertexAttribDivisorANGLE(this._aFlags2.location, 0);
}
if (this._aOffset) {
instanceExt.vertexAttribDivisorANGLE(this._aOffset.location, 0);
}
}
_allocate() {
const scene = this._scene;
const gl = scene.canvas.gl;
const lightsState = scene._lightsState;
this._program = new Program(gl, this._buildShader());
if (this._program.errors) {
this.errors = this._program.errors;
return;
}
this._instanceExt = gl.getExtension("ANGLE_instanced_arrays");
const program = this._program;
this._uRenderPass = program.getLocation("renderPass");
this._uPositionsDecodeMatrix = program.getLocation("positionsDecodeMatrix");
this._uWorldMatrix = program.getLocation("worldMatrix");
this._uWorldNormalMatrix = program.getLocation("worldNormalMatrix");
this._uViewMatrix = program.getLocation("viewMatrix");
this._uViewNormalMatrix = program.getLocation("viewNormalMatrix");
this._uProjMatrix = program.getLocation("projMatrix");
this._uGammaFactor = program.getLocation("gammaFactor");
this._uLightAmbient = program.getLocation("lightAmbient");
this._uLightColor = [];
this._uLightDir = [];
this._uLightPos = [];
this._uLightAttenuation = [];
const lights = lightsState.lights;
let light;
for (var i = 0, len = lights.length; i < len; i++) {
light = lights[i];
switch (light.type) {
case "dir":
this._uLightColor[i] = program.getLocation("lightColor" + i);
this._uLightPos[i] = null;
this._uLightDir[i] = program.getLocation("lightDir" + i);
break;
case "point":
this._uLightColor[i] = program.getLocation("lightColor" + i);
this._uLightPos[i] = program.getLocation("lightPos" + i);
this._uLightDir[i] = null;
this._uLightAttenuation[i] = program.getLocation("lightAttenuation" + i);
break;
case "spot":
this._uLightColor[i] = program.getLocation("lightColor" + i);
this._uLightPos[i] = program.getLocation("lightPos" + i);
this._uLightDir[i] = program.getLocation("lightDir" + i);
this._uLightAttenuation[i] = program.getLocation("lightAttenuation" + i);
break;
}
}
if (lightsState.reflectionMaps.length > 0) {
this._uReflectionMap = "reflectionMap";
}
if (lightsState.lightMaps.length > 0) {
this._uLightMap = "lightMap";
}
this._uSectionPlanes = [];
for (let i = 0, len = scene._sectionPlanesState.sectionPlanes.length; i < len; i++) {
this._uSectionPlanes.push({
active: program.getLocation("sectionPlaneActive" + i),
pos: program.getLocation("sectionPlanePos" + i),
dir: program.getLocation("sectionPlaneDir" + i)
});
}
this._aPosition = program.getAttribute("position");
this._aNormal = program.getAttribute("normal");
this._aColor = program.getAttribute("color");
this._aMetallicRoughness = program.getAttribute("metallicRoughness");
this._aFlags = program.getAttribute("flags");
this._aFlags2 = program.getAttribute("flags2");
this._aOffset = program.getAttribute("offset");
this._aModelMatrixCol0 = program.getAttribute("modelMatrixCol0");
this._aModelMatrixCol1 = program.getAttribute("modelMatrixCol1");
this._aModelMatrixCol2 = program.getAttribute("modelMatrixCol2");
this._aModelNormalMatrixCol0 = program.getAttribute("modelNormalMatrixCol0");
this._aModelNormalMatrixCol1 = program.getAttribute("modelNormalMatrixCol1");
this._aModelNormalMatrixCol2 = program.getAttribute("modelNormalMatrixCol2");
this._uOcclusionTexture = "uOcclusionTexture";
this._uSAOParams = program.getLocation("uSAOParams");
if (scene.logarithmicDepthBufferEnabled) {
this._uLogDepthBufFC = program.getLocation("logDepthBufFC");
}
}
_bindProgram(frameCtx) {
const maxTextureUnits = WEBGL_INFO.MAX_TEXTURE_UNITS;
const scene = this._scene;
const gl = scene.canvas.gl;
const lightsState = scene._lightsState;
const lights = lightsState.lights;
const project = scene.camera.project;
this._program.bind();
gl.uniformMatrix4fv(this._uProjMatrix, false, project.matrix);
if (this._uLightAmbient) {
gl.uniform4fv(this._uLightAmbient, scene._lightsState.getAmbientColorAndIntensity());
}
for (let i = 0, len = lights.length; i < len; i++) {
const light = lights[i];
if (this._uLightColor[i]) {
gl.uniform4f(this._uLightColor[i], light.color[0], light.color[1], light.color[2], light.intensity);
}
if (this._uLightPos[i]) {
gl.uniform3fv(this._uLightPos[i], light.pos);
if (this._uLightAttenuation[i]) {
gl.uniform1f(this._uLightAttenuation[i], light.attenuation);
}
}
if (this._uLightDir[i]) {
gl.uniform3fv(this._uLightDir[i], light.dir);
}
}
if (lightsState.reflectionMaps.length > 0 && lightsState.reflectionMaps[0].texture && this._uReflectionMap) {
this._program.bindTexture(this._uReflectionMap, lightsState.reflectionMaps[0].texture, frameCtx.textureUnit);
frameCtx.textureUnit = (frameCtx.textureUnit + 1) % maxTextureUnits;
frameCtx.bindTexture++;
}
if (lightsState.lightMaps.length > 0 && lightsState.lightMaps[0].texture && this._uLightMap) {
this._program.bindTexture(this._uLightMap, lightsState.lightMaps[0].texture, frameCtx.textureUnit);
frameCtx.textureUnit = (frameCtx.textureUnit + 1) % maxTextureUnits;
frameCtx.bindTexture++;
}
if (this._withSAO) {
const sao = scene.sao;
const saoEnabled = sao.possible;
if (saoEnabled) {
const viewportWidth = gl.drawingBufferWidth;
const viewportHeight = gl.drawingBufferHeight;
tempVec4[0] = viewportWidth;
tempVec4[1] = viewportHeight;
tempVec4[2] = sao.blendCutoff;
tempVec4[3] = sao.blendFactor;
gl.uniform4fv(this._uSAOParams, tempVec4);
this._program.bindTexture(this._uOcclusionTexture, frameCtx.occlusionTexture, frameCtx.textureUnit);
frameCtx.textureUnit = (frameCtx.textureUnit + 1) % maxTextureUnits;
frameCtx.bindTexture++;
}
}
if (scene.logarithmicDepthBufferEnabled) {
const logDepthBufFC = 2.0 / (Math.log(project.far + 1.0) / Math.LN2);
gl.uniform1f(this._uLogDepthBufFC, logDepthBufFC);
}
if (this._uGammaFactor) {
gl.uniform1f(this._uGammaFactor, scene.gammaFactor);
}
}
_buildShader() {
return {
vertex: this._buildVertexShader(),
fragment: this._buildFragmentShader()
};
}
_buildVertexShader() {
const scene = this._scene;
const sectionPlanesState = scene._sectionPlanesState;
const lightsState = scene._lightsState;
const clipping = sectionPlanesState.sectionPlanes.length > 0;
const clippingCaps = sectionPlanesState.clippingCaps;
const src = [];
src.push("// Instancing geometry quality drawing vertex shader");
if (scene.logarithmicDepthBufferEnabled && WEBGL_INFO.SUPPORTED_EXTENSIONS["EXT_frag_depth"]) {
src.push("#extension GL_EXT_frag_depth : enable");
}
src.push("uniform int renderPass;");
src.push("attribute vec3 position;");
src.push("attribute vec2 normal;");
src.push("attribute vec4 color;");
src.push("attribute vec2 metallicRoughness;");
src.push("attribute vec4 flags;");
src.push("attribute vec4 flags2;");
if (scene.entityOffsetsEnabled) {
src.push("attribute vec3 offset;");
}
src.push("attribute vec4 modelMatrixCol0;"); // Modeling matrix
src.push("attribute vec4 modelMatrixCol1;");
src.push("attribute vec4 modelMatrixCol2;");
src.push("attribute vec4 modelNormalMatrixCol0;");
src.push("attribute vec4 modelNormalMatrixCol1;");
src.push("attribute vec4 modelNormalMatrixCol2;");
src.push("uniform mat4 worldMatrix;");
src.push("uniform mat4 worldNormalMatrix;");
src.push("uniform mat4 viewMatrix;");
src.push("uniform mat4 viewNormalMatrix;");
src.push("uniform mat4 projMatrix;");
src.push("uniform mat4 positionsDecodeMatrix;");
if (scene.logarithmicDepthBufferEnabled) {
src.push("uniform float logDepthBufFC;");
if (WEBGL_INFO.SUPPORTED_EXTENSIONS["EXT_frag_depth"]) {
src.push("varying float vFragDepth;");
}
src.push("bool isPerspectiveMatrix(mat4 m) {");
src.push(" return (m[2][3] == - 1.0);");
src.push("}");
src.push("varying float isPerspective;");
}
src.push("vec3 octDecode(vec2 oct) {");
src.push(" vec3 v = vec3(oct.xy, 1.0 - abs(oct.x) - abs(oct.y));");
src.push(" if (v.z < 0.0) {");
src.push(" v.xy = (1.0 - abs(v.yx)) * vec2(v.x >= 0.0 ? 1.0 : -1.0, v.y >= 0.0 ? 1.0 : -1.0);");
src.push(" }");
src.push(" return normalize(v);");
src.push("}");
src.push("varying vec4 vViewPosition;");
src.push("varying vec3 vViewNormal;");
src.push("varying vec4 vColor;");
src.push("varying vec2 vMetallicRoughness;");
if (lightsState.lightMaps.length > 0) {
src.push("varying vec3 vWorldNormal;");
}
if (clipping) {
src.push("varying vec4 vWorldPosition;");
src.push("varying vec4 vFlags2;");
if (clippingCaps) {
src.push("varying vec4 vClipPosition;");
}
}
src.push("void main(void) {");
// flags.x = NOT_RENDERED | COLOR_OPAQUE | COLOR_TRANSPARENT
// renderPass = COLOR_OPAQUE | COLOR_TRANSPARENT
src.push(`if (int(flags.x) != renderPass) {`);
src.push(" gl_Position = vec4(0.0, 0.0, 0.0, 0.0);"); // Cull vertex
src.push("} else {");
src.push("vec4 worldPosition = positionsDecodeMatrix * vec4(position, 1.0); ");
src.push("worldPosition = worldMatrix * vec4(dot(worldPosition, modelMatrixCol0), dot(worldPosition, modelMatrixCol1), dot(worldPosition, modelMatrixCol2), 1.0);");
if (scene.entityOffsetsEnabled) {
src.push(" worldPosition.xyz = worldPosition.xyz + offset;");
}
src.push("vec4 viewPosition = viewMatrix * worldPosition; ");
src.push("vec4 modelNormal = vec4(octDecode(normal.xy), 0.0); ");
src.push("vec4 worldNormal = worldNormalMatrix * vec4(dot(modelNormal, modelNormalMatrixCol0), dot(modelNormal, modelNormalMatrixCol1), dot(modelNormal, modelNormalMatrixCol2), 0.0);");
src.push("vec3 viewNormal = vec4(viewNormalMatrix * worldNormal).xyz;");
src.push("vec4 clipPos = projMatrix * viewPosition;");
if (scene.logarithmicDepthBufferEnabled) {
if (WEBGL_INFO.SUPPORTED_EXTENSIONS["EXT_frag_depth"]) {
src.push("vFragDepth = 1.0 + clipPos.w;");
} else {
src.push("clipPos.z = log2( max( 1e-6, clipPos.w + 1.0 ) ) * logDepthBufFC - 1.0;");
src.push("clipPos.z *= clipPos.w;");
}
src.push("isPerspective = float (isPerspectiveMatrix(projMatrix));");
}
if (clipping) {
src.push("vWorldPosition = worldPosition;");
src.push("vFlags2 = flags2;");
if (clippingCaps) {
src.push("vClipPosition = clipPos;");
}
}
src.push("vViewPosition = viewPosition;");
src.push("vViewNormal = viewNormal;");
src.push("vColor = color;");
src.push("vMetallicRoughness = metallicRoughness;");
if (lightsState.lightMaps.length > 0) {
src.push("vWorldNormal = worldNormal.xyz;");
}
src.push("gl_Position = clipPos;");
src.push("}");
src.push("}");
return src;
}
_buildFragmentShader() {
const scene = this._scene;
const gammaOutput = scene.gammaOutput; // If set, then it expects that all textures and colors need to be outputted in premultiplied gamma. Default is false.
const sectionPlanesState = scene._sectionPlanesState;
const lightsState = scene._lightsState;
const clipping = sectionPlanesState.sectionPlanes.length > 0;
const clippingCaps = sectionPlanesState.clippingCaps;
const src = [];
src.push("// Instancing geometry quality drawing fragment shader");
if (scene.logarithmicDepthBufferEnabled && WEBGL_INFO.SUPPORTED_EXTENSIONS["EXT_frag_depth"]) {
src.push("#extension GL_EXT_frag_depth : enable");
}
src.push("#ifdef GL_FRAGMENT_PRECISION_HIGH");
src.push("precision highp float;");
src.push("precision highp int;");
src.push("#else");
src.push("precision mediump float;");
src.push("precision mediump int;");
src.push("#endif");
if (scene.logarithmicDepthBufferEnabled) {
src.push("varying float isPerspective;");
if (WEBGL_INFO.SUPPORTED_EXTENSIONS["EXT_frag_depth"]) {
src.push("uniform float logDepthBufFC;");
src.push("varying float vFragDepth;");
}
}
if (this._withSAO) {
src.push("uniform sampler2D uOcclusionTexture;");
src.push("uniform vec4 uSAOParams;");
src.push("const float packUpscale = 256. / 255.;");
src.push("const float unpackDownScale = 255. / 256.;");
src.push("const vec3 packFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );");
src.push("const vec4 unPackFactors = unpackDownScale / vec4( packFactors, 1. );");
src.push("float unpackRGBAToDepth( const in vec4 v ) {");
src.push(" return dot( v, unPackFactors );");
src.push("}");
}
if (lightsState.reflectionMaps.length > 0) {
src.push("uniform samplerCube reflectionMap;");
}
if (lightsState.lightMaps.length > 0) {
src.push("uniform samplerCube lightMap;");
}
src.push("uniform vec4 lightAmbient;");
for (let i = 0, len = lightsState.lights.length; i < len; i++) {
const light = lightsState.lights[i];
if (light.type === "ambient") {
continue;
}
src.push("uniform vec4 lightColor" + i + ";");
if (light.type === "dir") {
src.push("uniform vec3 lightDir" + i + ";");
}
if (light.type === "point") {
src.push("uniform vec3 lightPos" + i + ";");
}
if (light.type === "spot") {
src.push("uniform vec3 lightPos" + i + ";");
src.push("uniform vec3 lightDir" + i + ";");
}
}
src.push("uniform float gammaFactor;");
src.push("vec4 linearToLinear( in vec4 value ) {");
src.push(" return value;");
src.push("}");
src.push("vec4 sRGBToLinear( in vec4 value ) {");
src.push(" return vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.w );");
src.push("}");
src.push("vec4 gammaToLinear( in vec4 value) {");
src.push(" return vec4( pow( value.xyz, vec3( gammaFactor ) ), value.w );");
src.push("}");
if (gammaOutput) {
src.push("vec4 linearToGamma( in vec4 value, in float gammaFactor ) {");
src.push(" return vec4( pow( value.xyz, vec3( 1.0 / gammaFactor ) ), value.w );");
src.push("}");
}
if (clipping) {
src.push("varying vec4 vWorldPosition;");
src.push("varying vec4 vFlags2;");
if (clippingCaps) {
src.push("varying vec4 vClipPosition;");
}
for (let i = 0, len = sectionPlanesState.sectionPlanes.length; i < len; i++) {
src.push("uniform bool sectionPlaneActive" + i + ";");
src.push("uniform vec3 sectionPlanePos" + i + ";");
src.push("uniform vec3 sectionPlaneDir" + i + ";");
}
}
src.push("varying vec4 vViewPosition;");
src.push("varying vec3 vViewNormal;");
src.push("varying vec4 vColor;");
src.push("varying vec2 vMetallicRoughness;");
if (lightsState.lightMaps.length > 0) {
src.push("varying vec3 vWorldNormal;");
}
src.push("uniform mat4 viewMatrix;");
// CONSTANT DEFINITIONS
src.push("#define PI 3.14159265359");
src.push("#define RECIPROCAL_PI 0.31830988618");
src.push("#define RECIPROCAL_PI2 0.15915494");
src.push("#define EPSILON 1e-6");
src.push("#define saturate(a) clamp( a, 0.0, 1.0 )");
// UTILITY DEFINITIONS
src.push("vec3 inverseTransformDirection(in vec3 dir, in mat4 matrix) {");
src.push(" return normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );");
src.push("}");
// STRUCTURES
src.push("struct IncidentLight {");
src.push(" vec3 color;");
src.push(" vec3 direction;");
src.push("};");
src.push("struct ReflectedLight {");
src.push(" vec3 diffuse;");
src.push(" vec3 specular;");
src.push("};");
src.push("struct Geometry {");
src.push(" vec3 position;");
src.push(" vec3 viewNormal;");
src.push(" vec3 worldNormal;");
src.push(" vec3 viewEyeDir;");
src.push("};");
src.push("struct Material {");
src.push(" vec3 diffuseColor;");
src.push(" float specularRoughness;");
src.push(" vec3 specularColor;");
src.push(" float shine;"); // Only used for Phong
src.push("};");
// IRRADIANCE EVALUATION
src.push("float GGXRoughnessToBlinnExponent(const in float ggxRoughness) {");
src.push(" float r = ggxRoughness + 0.0001;");
src.push(" return (2.0 / (r * r) - 2.0);");
src.push("}");
src.push("float getSpecularMIPLevel(const in float blinnShininessExponent, const in int maxMIPLevel) {");
src.push(" float maxMIPLevelScalar = float( maxMIPLevel );");
src.push(" float desiredMIPLevel = maxMIPLevelScalar - 0.79248 - 0.5 * log2( ( blinnShininessExponent * blinnShininessExponent ) + 1.0 );");
src.push(" return clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );");
src.push("}");
if (lightsState.reflectionMaps.length > 0) {
src.push("vec3 getLightProbeIndirectRadiance(const in vec3 reflectVec, const in float blinnShininessExponent, const in int maxMIPLevel) {");
src.push(" float mipLevel = 0.5 * getSpecularMIPLevel(blinnShininessExponent, maxMIPLevel);"); //TODO: a random factor - fix this
src.push(" vec3 envMapColor = " + TEXTURE_DECODE_FUNCS[lightsState.reflectionMaps[0].encoding] + "(textureCube(reflectionMap, reflectVec, mipLevel)).rgb;");
src.push(" return envMapColor;");
src.push("}");
}
// SPECULAR BRDF EVALUATION
src.push("vec3 F_Schlick(const in vec3 specularColor, const in float dotLH) {");
src.push(" float fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );");
src.push(" return ( 1.0 - specularColor ) * fresnel + specularColor;");
src.push("}");
src.push("float G_GGX_Smith(const in float alpha, const in float dotNL, const in float dotNV) {");
src.push(" float a2 = ( alpha * alpha );");
src.push(" float gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * ( dotNL * dotNL ) );");
src.push(" float gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * ( dotNV * dotNV ) );");
src.push(" return 1.0 / ( gl * gv );");
src.push("}");
src.push("float G_GGX_SmithCorrelated(const in float alpha, const in float dotNL, const in float dotNV) {");
src.push(" float a2 = ( alpha * alpha );");
src.push(" float gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * ( dotNV * dotNV ) );");
src.push(" float gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * ( dotNL * dotNL ) );");
src.push(" return 0.5 / max( gv + gl, EPSILON );");
src.push("}");
src.push("float D_GGX(const in float alpha, const in float dotNH) {");
src.push(" float a2 = ( alpha * alpha );");
src.push(" float denom = ( dotNH * dotNH) * ( a2 - 1.0 ) + 1.0;");
src.push(" return RECIPROCAL_PI * a2 / ( denom * denom);");
src.push("}");
src.push("vec3 BRDF_Specular_GGX(const in IncidentLight incidentLight, const in Geometry geometry, const in vec3 specularColor, const in float roughness) {");
src.push(" float alpha = ( roughness * roughness );");
src.push(" vec3 halfDir = normalize( incidentLight.direction + geometry.viewEyeDir );");
src.push(" float dotNL = saturate( dot( geometry.viewNormal, incidentLight.direction ) );");
src.push(" float dotNV = saturate( dot( geometry.viewNormal, geometry.viewEyeDir ) );");
src.push(" float dotNH = saturate( dot( geometry.viewNormal, halfDir ) );");
src.push(" float dotLH = saturate( dot( incidentLight.direction, halfDir ) );");
src.push(" vec3 F = F_Schlick( specularColor, dotLH );");
src.push(" float G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );");
src.push(" float D = D_GGX( alpha, dotNH );");
src.push(" return F * (G * D);");
src.push("}");
src.push("vec3 BRDF_Specular_GGX_Environment(const in Geometry geometry, const in vec3 specularColor, const in float roughness) {");
src.push(" float dotNV = saturate(dot(geometry.viewNormal, geometry.viewEyeDir));");
src.push(" const vec4 c0 = vec4( -1, -0.0275, -0.572, 0.022);");
src.push(" const vec4 c1 = vec4( 1, 0.0425, 1.04, -0.04);");
src.push(" vec4 r = roughness * c0 + c1;");
src.push(" float a004 = min(r.x * r.x, exp2(-9.28 * dotNV)) * r.x + r.y;");
src.push(" vec2 AB = vec2(-1.04, 1.04) * a004 + r.zw;");
src.push(" return specularColor * AB.x + AB.y;");
src.push("}");
if (lightsState.lightMaps.length > 0 || lightsState.reflectionMaps.length > 0) {
src.push("void computePBRLightMapping(const in Geometry geometry, const in Material material, inout ReflectedLight reflectedLight) {");
if (lightsState.lightMaps.length > 0) {
src.push(" vec3 irradiance = " + TEXTURE_DECODE_FUNCS[lightsState.lightMaps[0].encoding] + "(textureCube(lightMap, geometry.worldNormal)).rgb;");
src.push(" irradiance *= PI;");
src.push(" vec3 diffuseBRDFContrib = (RECIPROCAL_PI * material.diffuseColor);");
src.push(" reflectedLight.diffuse += irradiance * diffuseBRDFContrib;");
}
if (lightsState.reflectionMaps.length > 0) {
src.push(" vec3 reflectVec = reflect(geometry.viewEyeDir, geometry.viewNormal);");
src.push(" reflectVec = inverseTransformDirection(reflectVec, viewMatrix);");
src.push(" float blinnExpFromRoughness = GGXRoughnessToBlinnExponent(material.specularRoughness);");
src.push(" vec3 radiance = getLightProbeIndirectRadiance(reflectVec, blinnExpFromRoughness, 8);");
src.push(" vec3 specularBRDFContrib = BRDF_Specular_GGX_Environment(geometry, material.specularColor, material.specularRoughness);");
src.push(" reflectedLight.specular += radiance * specularBRDFContrib;");
}
src.push("}");
}
// MAIN LIGHTING COMPUTATION FUNCTION
src.push("void computePBRLighting(const in IncidentLight incidentLight, const in Geometry geometry, const in Material material, inout ReflectedLight reflectedLight) {");
src.push(" float dotNL = saturate(dot(geometry.viewNormal, incidentLight.direction));");
src.push(" vec3 irradiance = dotNL * incidentLight.color * PI;");
src.push(" reflectedLight.diffuse += irradiance * (RECIPROCAL_PI * material.diffuseColor);");
src.push(" reflectedLight.specular += irradiance * BRDF_Specular_GGX(incidentLight, geometry, material.specularColor, material.specularRoughness);");
src.push("}");
src.push("void main(void) {");
if (clipping) {
src.push(" bool clippable = (float(vFlags2.x) > 0.0);");
src.push(" if (clippable) {");
src.push(" float dist = 0.0;");
for (let i = 0, len = sectionPlanesState.sectionPlanes.length; i < len; i++) {
src.push("if (sectionPlaneActive" + i + ") {");
src.push(" dist += clamp(dot(-sectionPlaneDir" + i + ".xyz, vWorldPosition.xyz - sectionPlanePos" + i + ".xyz), 0.0, 1000.0);");
src.push("}");
}
if (clippingCaps) {
src.push(" if (dist > (0.002 * vClipPosition.w)) {");
src.push(" discard;");
src.push(" }");
src.push(" if (dist > 0.0) { ");
src.push(" gl_FragColor=vec4(1.0, 0.0, 0.0, 1.0);");
if (scene.logarithmicDepthBufferEnabled && WEBGL_INFO.SUPPORTED_EXTENSIONS["EXT_frag_depth"]) {
src.push(" gl_FragDepthEXT = log2( vFragDepth ) * logDepthBufFC * 0.5;");
}
src.push(" return;");
src.push("}");
} else {
src.push(" if (dist > 0.0) { ");
src.push(" discard;")
src.push(" }");
}
src.push("}");
}
src.push("IncidentLight light;");
src.push("Material material;");
src.push("Geometry geometry;");
src.push("ReflectedLight reflectedLight = ReflectedLight(vec3(0.0,0.0,0.0), vec3(0.0,0.0,0.0));");
src.push("vec3 rgb = (vec3(float(vColor.r) / 255.0, float(vColor.g) / 255.0, float(vColor.b) / 255.0));");
src.push("float alpha = float(vColor.a) / 255.0;");
src.push("vec3 diffuseColor = rgb;");
src.push("float specularF0 = 1.0;");
src.push("float metallic = float(vMetallicRoughness.r) / 255.0;");
src.push("float roughness = float(vMetallicRoughness.g) / 255.0;");
src.push("float dielectricSpecular = 0.16 * specularF0 * specularF0;");
src.push("material.diffuseColor = diffuseColor * (1.0 - dielectricSpecular) * (1.0 - metallic);");
src.push("material.specularRoughness = clamp(roughness, 0.04, 1.0);");
src.push("material.specularColor = mix(vec3(dielectricSpecular), diffuseColor, metallic);");
src.push("geometry.position = vViewPosition.xyz;");
src.push("geometry.viewNormal = -normalize(vViewNormal);");
src.push("geometry.viewEyeDir = normalize(vViewPosition.xyz);");
if (lightsState.lightMaps.length > 0) {
src.push("geometry.worldNormal = normalize(vWorldNormal);");
}
if (lightsState.lightMaps.length > 0 || lightsState.reflectionMaps.length > 0) {
src.push("computePBRLightMapping(geometry, material, reflectedLight);");
}
for (let i = 0, len = lightsState.lights.length; i < len; i++) {
const light = lightsState.lights[i];
if (light.type === "ambient") {
continue;
}
if (light.type === "dir") {
if (light.space === "view") {
src.push("light.direction = normalize(lightDir" + i + ");");
} else {
src.push("light.direction = normalize((viewMatrix * vec4(lightDir" + i + ", 0.0)).xyz);");
}
} else if (light.type === "point") {
if (light.space === "view") {
src.push("light.direction = normalize(lightPos" + i + " - vViewPosition.xyz);");
} else {
src.push("light.direction = normalize((viewMatrix * vec4(lightPos" + i + ", 0.0)).xyz);");
}
} else if (light.type === "spot") {
if (light.space === "view") {
src.push("light.direction = normalize(lightDir" + i + ");");
} else {
src.push("light.direction = normalize((viewMatrix * vec4(lightDir" + i + ", 0.0)).xyz);");
}
} else {
continue;
}
src.push("light.color = lightColor" + i + ".rgb * lightColor" + i + ".a;"); // a is intensity
src.push("computePBRLighting(light, geometry, material, reflectedLight);");
}
src.push("vec3 outgoingLight = (lightAmbient.rgb * lightAmbient.a * rgb) + (reflectedLight.diffuse) + (reflectedLight.specular);");
src.push("vec4 fragColor;");
if (this._withSAO) {
// Doing SAO blend in the main solid fill draw shader just so that edge lines can be drawn over the top
// Would be more efficient to defer this, then render lines later, using same depth buffer for Z-reject
src.push(" float viewportWidth = uSAOParams[0];");
src.push(" float viewportHeight = uSAOParams[1];");
src.push(" float blendCutoff = uSAOParams[2];");
src.push(" float blendFactor = uSAOParams[3];");
src.push(" vec2 uv = vec2(gl_FragCoord.x / viewportWidth, gl_FragCoord.y / viewportHeight);");
src.push(" float ambient = smoothstep(blendCutoff, 1.0, unpackRGBAToDepth(texture2D(uOcclusionTexture, uv))) * blendFactor;");
src.push(" fragColor = vec4(outgoingLight.rgb * ambient, alpha);");
} else {
src.push(" fragColor = vec4(outgoingLight.rgb, alpha);");
}
if (gammaOutput) {
src.push("fragColor = linearToGamma(fragColor, gammaFactor);");
}
src.push("gl_FragColor = fragColor;");
if (scene.logarithmicDepthBufferEnabled && WEBGL_INFO.SUPPORTED_EXTENSIONS["EXT_frag_depth"]) {
src.push(" gl_FragDepthEXT = isPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;");
}
src.push("}");
return src;
}
webglContextRestored() {
this._program = null;
}
destroy() {
if (this._program) {
this._program.destroy();
}
this._program = null;
}
}
export {TrianglesInstancingColorQualityRenderer};