102 lines
2.6 KiB
JavaScript
102 lines
2.6 KiB
JavaScript
BIMLoader = function(json)
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{
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// 解析材质
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var materials = new Array();
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json.materials.forEach(element => {
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var material = ParseMaterial(element);
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materials.push(material);
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});
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// 解析网格
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var meshes = new Array();
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json.meshes.forEach(element => {
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var geometry = ParseGeometry(element);
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var material = materials[element.material];
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var mesh = new THREE.Mesh(geometry, material);
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meshes.push(mesh);
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});
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// 解析物体
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var scene = new THREE.Scene();
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json.instances.forEach(element => {
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var object = ParseInstance(element, meshes, element.mesh);
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scene.add(object);
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});
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return scene;
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function ParseMaterial(materialJson)
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{
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var material = new THREE.MeshPhongMaterial();
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if(materialJson.color)
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material.color.setStyle(materialJson.color);
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if(materialJson.transparent)
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{
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material.transparent = true;
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material.opacity = materialJson.transparent;
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}
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return material;
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}
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function ParseGeometry(geometryJson)
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{
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var geometry = new THREE.BufferGeometry();
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geometry.setAttribute('position', new THREE.BufferAttribute(new Float32Array(geometryJson.vertices), 3));
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geometry.setIndex(new THREE.BufferAttribute(new Uint32Array(geometryJson.indices), 1));
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geometry.setAttribute('normal', new THREE.BufferAttribute(new Float32Array(geometryJson.normals), 3));
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return geometry;
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}
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function ParseInstance(instanceJson, meshes, index)
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{
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var obj = new THREE.Object3D();
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if(instanceJson.id)
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obj.name = instanceJson.id;
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if(instanceJson.transform)
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{
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var matrix4 = new THREE.Matrix4();
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matrix4.fromArray(instanceJson.transform);
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obj.matrixAutoUpdate = false;
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obj.matrix.copy(matrix4);
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obj.matrixWorldNeedsUpdate = true;
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}
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if(instanceJson.visible)
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obj.visible = instanceJson.visible;
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if(instanceJson.info)
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obj.userData = instanceJson.info;
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if(Array.isArray(index))
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{
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index.forEach(element => {
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PutMesh(meshes[element], obj);
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});
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}
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else
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{
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PutMesh(meshes[index], obj);
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}
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return obj;
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}
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function PutMesh(mesh, obj)
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{
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var edges = new THREE.EdgesGeometry(mesh.geometry);
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var line = new THREE.LineSegments(edges, new THREE.LineBasicMaterial({color: 0xff0000}));
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obj.add(mesh);
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obj.add(line);
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}
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} |