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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | import ForEach from "./ForEach.js";
import Check from "../../Core/Check.js";
import defined from "../../Core/defined.js";
/**
* Calls the provider handler function on each texture used by the material.
* Mimics the behavior of functions in gltf-pipeline ForEach.
* @param {object} material The glTF material.
* @param {forEachTextureInMaterial~handler} handler Function that is called for each texture in the material.
*
* @private
*/
function forEachTextureInMaterial(material, handler) {
Check.typeOf.object("material", material);
Check.defined("handler", handler);
// Metallic roughness
const pbrMetallicRoughness = material.pbrMetallicRoughness;
if (defined(pbrMetallicRoughness)) {
if (defined(pbrMetallicRoughness.baseColorTexture)) {
const textureInfo = pbrMetallicRoughness.baseColorTexture;
const value = handler(textureInfo.index, textureInfo);
if (defined(value)) {
return value;
}
}
if (defined(pbrMetallicRoughness.metallicRoughnessTexture)) {
const textureInfo = pbrMetallicRoughness.metallicRoughnessTexture;
const value = handler(textureInfo.index, textureInfo);
if (defined(value)) {
return value;
}
}
}
const { extensions } = material;
if (defined(extensions)) {
// Spec gloss extension
const pbrSpecularGlossiness =
extensions.KHR_materials_pbrSpecularGlossiness;
if (defined(pbrSpecularGlossiness)) {
if (defined(pbrSpecularGlossiness.diffuseTexture)) {
const textureInfo = pbrSpecularGlossiness.diffuseTexture;
const value = handler(textureInfo.index, textureInfo);
if (defined(value)) {
return value;
}
}
if (defined(pbrSpecularGlossiness.specularGlossinessTexture)) {
const textureInfo = pbrSpecularGlossiness.specularGlossinessTexture;
const value = handler(textureInfo.index, textureInfo);
if (defined(value)) {
return value;
}
}
}
// Specular extension
const specular = extensions.KHR_materials_specular;
if (defined(specular)) {
const { specularTexture, specularColorTexture } = specular;
if (defined(specularTexture)) {
const value = handler(specularTexture.index, specularTexture);
if (defined(value)) {
return value;
}
}
if (defined(specularColorTexture)) {
const value = handler(specularColorTexture.index, specularColorTexture);
if (defined(value)) {
return value;
}
}
}
// Materials common extension (may be present in models converted from glTF 1.0)
const materialsCommon = extensions.KHR_materials_common;
if (defined(materialsCommon) && defined(materialsCommon.values)) {
const { diffuse, ambient, emission, specular } = materialsCommon.values;
if (defined(diffuse) && defined(diffuse.index)) {
const value = handler(diffuse.index, diffuse);
if (defined(value)) {
return value;
}
}
if (defined(ambient) && defined(ambient.index)) {
const value = handler(ambient.index, ambient);
if (defined(value)) {
return value;
}
}
if (defined(emission) && defined(emission.index)) {
const value = handler(emission.index, emission);
if (defined(value)) {
return value;
}
}
if (defined(specular) && defined(specular.index)) {
const value = handler(specular.index, specular);
if (defined(value)) {
return value;
}
}
}
}
// KHR_techniques_webgl extension
const value = ForEach.materialValue(material, function (materialValue) {
if (defined(materialValue.index)) {
const value = handler(materialValue.index, materialValue);
if (defined(value)) {
return value;
}
}
});
if (defined(value)) {
return value;
}
// Top level textures
if (defined(material.emissiveTexture)) {
const textureInfo = material.emissiveTexture;
const value = handler(textureInfo.index, textureInfo);
if (defined(value)) {
return value;
}
}
if (defined(material.normalTexture)) {
const textureInfo = material.normalTexture;
const value = handler(textureInfo.index, textureInfo);
if (defined(value)) {
return value;
}
}
if (defined(material.occlusionTexture)) {
const textureInfo = material.occlusionTexture;
const value = handler(textureInfo.index, textureInfo);
if (defined(value)) {
return value;
}
}
}
/**
* Function that is called for each texture in the material. If this function returns a value the for each stops and returns that value.
* @callback forEachTextureInMaterial~handler
* @param {number} The texture index.
* @param {object} The texture info object.
*
* @private
*/
export default forEachTextureInMaterial;
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