getParameters method
Implementation
WebGLParameters getParameters(Material material, LightState lights, List<Light> shadows, Scene scene, Object3D object) {
final fog = scene.fog;
final geometry = object.geometry;
final environment = material is MeshStandardMaterial ? scene.environment : null;
Texture? envMap;
if (material is MeshStandardMaterial) {
envMap = cubeuvmaps.get(material.envMap ?? environment);
} else {
envMap = cubemaps.get(material.envMap ?? environment);
}
final cubeUVHeight = (envMap != null) && (envMap.mapping == CubeUVReflectionMapping) ? envMap.image?.height : null;
final shaderID = shaderIDs[material.shaderID];
// heuristics to create shader parameters according to lights in the scene
// (not to blow over maxLights budget)
if (material.precision != null) {
precision = capabilities.getMaxPrecision(material.precision);
if (precision != material.precision) {
console.warning('WebGLProgram.getParameters: ${material.precision} not supported, using $precision instead.');
}
}
final morphAttribute = geometry?.morphAttributes["position"] ?? geometry?.morphAttributes["normal"] ?? geometry?.morphAttributes["color"];
final morphTargetsCount = (morphAttribute != null) ? morphAttribute.length : 0;
int morphTextureStride = 0;
if (geometry?.morphAttributes["position"] != null) morphTextureStride = 1;
if (geometry?.morphAttributes["normal"] != null) morphTextureStride = 2;
if (geometry?.morphAttributes["color"] != null) morphTextureStride = 3;
//
String? vertexShader, fragmentShader;
dynamic customVertexShaderID;
dynamic customFragmentShaderID;
if (shaderID != null) {
final shader = shaderLib[shaderID];
vertexShader = shader["vertexShader"];
fragmentShader = shader["fragmentShader"];
} else {
vertexShader = material.vertexShader;
fragmentShader = material.fragmentShader;
_customShaders.update(material);
customVertexShaderID = _customShaders.getVertexShaderID(material);
customFragmentShaderID = _customShaders.getFragmentShaderID(material);
}
// print(" WebGLPrograms material : ${material.type} ${material.shaderID} ${material.id} object: ${object.type} ${object.id} shaderID: ${shaderID} vertexColors: ${material.vertexColors} ");
final currentRenderTarget = renderer.getRenderTarget();
final useAlphaTest = material.alphaTest > 0;
final useClearcoat = material.clearcoat > 0;
final parameters = WebGLParameters.create();
parameters.isWebGL2 = isWebGL2;
parameters.shaderID = shaderID;
parameters.shaderName = "${material.type} - ${material.name}";
parameters.vertexShader = vertexShader!;
parameters.fragmentShader = fragmentShader!;
parameters.defines = material.defines;
parameters.customVertexShaderID = customVertexShaderID;
parameters.customFragmentShaderID = customFragmentShaderID;
parameters.isRawShaderMaterial = material is RawShaderMaterial;
parameters.glslVersion = material.glslVersion;
parameters.precision = precision;
parameters.instancing = object is InstancedMesh;
parameters.instancingColor = object is InstancedMesh && object.instanceColor != null;
parameters.supportsVertexTextures = vertexTextures;
parameters.outputEncoding = (currentRenderTarget == null)
? renderer.outputEncoding
: (currentRenderTarget.isXRRenderTarget == true ? currentRenderTarget.texture.encoding : LinearEncoding);
parameters.map = material.map != null;
parameters.matcap = material.matcap != null;
parameters.envMap = envMap != null;
parameters.envMapMode = envMap?.mapping;
parameters.cubeUVHeight = cubeUVHeight;
parameters.lightMap = material.lightMap != null;
parameters.aoMap = material.aoMap != null;
parameters.emissiveMap = material.emissiveMap != null;
parameters.bumpMap = material.bumpMap != null;
parameters.normalMap = material.normalMap != null;
parameters.objectSpaceNormalMap = material.normalMapType == ObjectSpaceNormalMap;
parameters.tangentSpaceNormalMap = material.normalMapType == TangentSpaceNormalMap;
parameters.decodeVideoTexture =
material.map != null && (material.map is VideoTexture) && (material.map!.encoding == sRGBEncoding);
parameters.clearcoat = useClearcoat;
parameters.clearcoatMap = useClearcoat && material.clearcoatMap != null;
parameters.clearcoatRoughnessMap = useClearcoat && material.clearcoatRoughnessMap != null;
parameters.clearcoatNormalMap = useClearcoat && material.clearcoatNormalMap != null;
parameters.displacementMap = material.displacementMap != null;
parameters.roughnessMap = material.roughnessMap != null;
parameters.metalnessMap = material.metalnessMap != null;
parameters.specularMap = material.specularMap != null;
parameters.specularIntensityMap = material.specularIntensityMap != null;
parameters.specularColorMap = material.specularColorMap != null;
parameters.opaque = material.transparent == false && material.blending == NormalBlending;
parameters.alphaMap = material.alphaMap != null;
parameters.alphaTest = useAlphaTest;
parameters.gradientMap = material.gradientMap != null;
parameters.sheen = material.sheen > 0;
parameters.sheenColorMap = material.sheenColorMap != null;
parameters.sheenRoughnessMap = material.sheenRoughnessMap != null;
parameters.transmission = material.transmission > 0;
parameters.transmissionMap = material.transmissionMap != null;
parameters.thicknessMap = material.thicknessMap != null;
parameters.combine = material.combine;
parameters.vertexTangents =
(material.normalMap != null && geometry != null && geometry.attributes["tangent"] != null);
parameters.vertexColors = material.vertexColors;
parameters.vertexAlphas = material.vertexColors == true &&
geometry != null &&
geometry.attributes["color"] != null &&
geometry.attributes["color"].itemSize == 4;
parameters.vertexUvs = material.map != null ||
material.bumpMap != null ||
material.normalMap != null ||
material.specularMap != null ||
material.alphaMap != null ||
material.emissiveMap != null ||
material.roughnessMap != null ||
material.metalnessMap != null ||
material.clearcoatMap != null ||
material.clearcoatRoughnessMap != null ||
material.clearcoatNormalMap != null ||
material.displacementMap != null ||
material.transmissionMap != null ||
material.thicknessMap != null ||
material.specularIntensityMap != null ||
material.specularColorMap != null ||
material.sheenColorMap != null ||
material.sheenRoughnessMap != null;
parameters.uvsVertexOnly = !(material.map != null ||
material.bumpMap != null ||
material.normalMap != null ||
material.specularMap != null ||
material.alphaMap != null ||
material.emissiveMap != null ||
material.roughnessMap != null ||
material.metalnessMap != null ||
material.clearcoatNormalMap != null ||
material.transmissionMap != null ||
material.thicknessMap != null ||
material.sheen > 0 ||
material.sheenColorMap != null ||
material.sheenRoughnessMap != null) &&
material.displacementMap != null;
parameters.fog = fog != null;
parameters.useFog = material.fog;
parameters.fogExp2 = (fog != null && fog.isFogExp2);
parameters.flatShading = material.flatShading;
parameters.sizeAttenuation = material.sizeAttenuation;
parameters.logarithmicDepthBuffer = logarithmicDepthBuffer;
parameters.skinning = object is SkinnedMesh;
parameters.morphTargets = geometry != null && geometry.morphAttributes["position"] != null;
parameters.morphNormals = geometry != null && geometry.morphAttributes["normal"] != null;
parameters.morphColors = geometry != null && geometry.morphAttributes["color"] != null;
parameters.morphTargetsCount = morphTargetsCount;
parameters.morphTextureStride = morphTextureStride;
parameters.numDirLights = lights.directional.length;
parameters.numPointLights = lights.point.length;
parameters.numSpotLights = lights.spot.length;
parameters.numRectAreaLights = lights.rectArea.length;
parameters.numHemiLights = lights.hemi.length;
parameters.numDirLightShadows = lights.directionalShadowMap.length;
parameters.numPointLightShadows = lights.pointShadowMap.length;
parameters.numSpotLightShadows = lights.spotShadowMap.length;
parameters.numClippingPlanes = clipping.numPlanes;
parameters.numClipIntersection = clipping.numIntersection;
parameters.dithering = material.dithering;
parameters.shadowMapEnabled = renderer.shadowMap.enabled && shadows.isNotEmpty;
parameters.shadowMapType = renderer.shadowMap.type;
parameters.toneMapping = material.toneMapped ? renderer.toneMapping : NoToneMapping;
parameters.physicallyCorrectLights = renderer.physicallyCorrectLights;
parameters.premultipliedAlpha = material.premultipliedAlpha;
parameters.doubleSided = material.side == DoubleSide;
parameters.flipSided = material.side == BackSide;
parameters.useDepthPacking = material.depthPacking != null;
parameters.depthPacking = material.depthPacking ?? 0;
parameters.index0AttributeName = material.index0AttributeName;
parameters.extensionDerivatives = material.extensions != null && material.extensions!["derivatives"] != null;
parameters.extensionFragDepth = material.extensions != null && material.extensions!["fragDepth"] != null;
parameters.extensionDrawBuffers = material.extensions != null && material.extensions!["drawBuffers"] != null;
parameters.extensionShaderTextureLOD =
material.extensions != null && material.extensions!["shaderTextureLOD"] != null;
parameters.rendererExtensionFragDepth = isWebGL2 ? isWebGL2 : extensions.has('EXT_frag_depth');
parameters.rendererExtensionDrawBuffers = isWebGL2 ? isWebGL2 : extensions.has('WEBGL_draw_buffers');
parameters.rendererExtensionShaderTextureLod = isWebGL2 ? isWebGL2 : extensions.has('EXT_shader_texture_lod');
parameters.customProgramCacheKey = material.customProgramCacheKey() ?? "";
return parameters;
}
