RuntimeError: Unsupported glTF Extension: KHR_technique_webgl
这个gltf是很久之前的数据,使用osgb转Cesium 3D tiles工具转换的是没有这个问题的。
解决办法:
在初始化地球之前,加入下面的代码即可:
/* 解决加载gltf2.0报错的问题 */ var fixGltf = function (gltf) { if (!gltf.extensionsUsed || !gltf.extensionsRequired) { return; } var v = gltf.extensionsUsed.indexOf('KHR_technique_webgl'); var t = gltf.extensionsRequired.indexOf('KHR_technique_webgl'); if (v !== -1) { gltf.extensionsRequired.splice(t, 1, 'KHR_techniques_webgl'); gltf.extensionsUsed.splice(v, 1, 'KHR_techniques_webgl'); gltf.extensions = gltf.extensions || {}; gltf.extensions['KHR_techniques_webgl'] = {}; gltf.extensions['KHR_techniques_webgl'].programs = gltf.programs; gltf.extensions['KHR_techniques_webgl'].shaders = gltf.shaders; gltf.extensions['KHR_techniques_webgl'].techniques = gltf.techniques; var techniques = gltf.extensions['KHR_techniques_webgl'].techniques; gltf.materials.forEach(function (mat, index) { gltf.materials[index].extensions['KHR_technique_webgl'].values = gltf.materials[index].values; gltf.materials[index].extensions['KHR_techniques_webgl'] = gltf.materials[index].extensions['KHR_technique_webgl']; var vtxfMaterialExtension = gltf.materials[index].extensions['KHR_techniques_webgl']; for (var value in vtxfMaterialExtension.values) { var us = techniques[vtxfMaterialExtension.technique].uniforms; for (var key in us) { if (us[key] === value) { vtxfMaterialExtension.values[key] = vtxfMaterialExtension.values[value]; delete vtxfMaterialExtension.values[value]; break; } } }; }); techniques.forEach(function (t) { for (var attribute in t.attributes) { var name = t.attributes[attribute]; t.attributes[attribute] = t.parameters[name]; }; for (var uniform in t.uniforms) { var name = t.uniforms[uniform]; t.uniforms[uniform] = t.parameters[name]; }; }); } } Object.defineProperties(Cesium.Model.prototype, { _cachedGltf: { set: function (value) { this._vtxf_cachedGltf = value; if (this._vtxf_cachedGltf && this._vtxf_cachedGltf._gltf) { fixGltf(this._vtxf_cachedGltf._gltf); } }, get: function () { return this._vtxf_cachedGltf; } } });