153 lines
4.8 KiB
JavaScript
153 lines
4.8 KiB
JavaScript
class Model extends THREE.Mesh {
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constructor(path) {
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let geometry = new THREE.Geometry();
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let materials = [
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new THREE.MeshLambertMaterial( { color: 0xffffff, side: THREE.DoubleSide } ),
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new THREE.MeshBasicMaterial( { transparent: true, opacity: 0 } )
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];
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super(geometry, materials);
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this.frustumCulled = false;
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this.path = path;
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this.vertices = [];
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this.currentLine = 1;
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}
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throwError(message) {
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let e = new Error("In " + this.path + ":L" + this.currentLine + " " + message);
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e.type = "custom";
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throw e;
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}
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checkVertex(id) {
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if (this.geometry.vertices[id] === undefined) {
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this.throwError("EditVertex requires vertex " + (id + 1) + " but there is no such vertex");
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}
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}
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checkFaceId(id) {
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if (this.geometry.faces[id] === undefined) {
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this.throwError("EditFace requires face " + (id + 1) + " but there is no such face");
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}
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}
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checkFace(f) {
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let vertices = this.geometry.vertices;
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if (vertices[f.a] === undefined) {
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this.throwError("Face requires vertex " + (f.a + 1) + " but there is no such vertex");
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}
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if (vertices[f.b] === undefined) {
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this.throwError("Face requires vertex " + (f.b + 1) + " but there is no such vertex");
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}
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if (vertices[f.c] === undefined) {
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this.throwError("Face requires vertex " + (f.c + 1) + " but there is no such vertex");
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}
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}
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manageElement(element) {
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let vertices = this.geometry.vertices;
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let f, normal;
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switch (element.type) {
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case Element.AddVertex:
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this.geometry.vertices.push(element.value);
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this.geometry.verticesNeedUpdate = true;
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break;
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case Element.EditVertex:
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this.checkVertex(element.id);
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this.geometry.vertices[element.id].copy(element.value);
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this.geometry.verticesNeedUpdate = true;
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break;
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case Element.TranslateVertex:
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this.checkVertex(element.id);
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this.geometry.vertices[element.id].add(element.value);
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this.geometry.verticesNeedUpdate = true;
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break;
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case Element.AddFace:
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f = element.value;
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this.checkFace(f);
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normal =
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vertices[f.b].clone().sub(vertices[f.a])
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.cross(vertices[f.c].clone().sub(vertices[f.a]));
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normal.normalize();
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f.normal = normal;
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f.materialIndex = 0;
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this.geometry.faces.push(f);
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this.geometry.elementsNeedUpdate = true;
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break;
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case Element.AddTriangleStrip:
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case Element.AddTriangleFan:
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for (let f of element.value) {
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this.checkFace(f);
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let normal =
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vertices[f.b].clone().sub(vertices[f.a])
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.cross(vertices[f.c].clone().sub(vertices[f.a]));
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normal.normalize();
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f.normal = normal;
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f.materialIndex = 0;
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this.geometry.faces.push(f);
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}
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this.geometry.elementsNeedUpdate = true;
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break;
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case Element.EditFace:
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f = element.value;
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this.checkFaceId(element.id);
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this.checkFace(f);
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normal =
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vertices[f.b].clone().sub(vertices[f.a])
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.cross(vertices[f.c].clone().sub(vertices[f.a]));
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normal.normalize();
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f.normal = normal;
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this.geometry.faces[element.id] = f;
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this.geometry.elementsNeedUpdate = true;
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break;
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case Element.EditFaceVertex:
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this.checkFaceId(element.id);
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switch (element.oldIndex) {
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case 0: this.geometry.faces[element.id].a = element.value; break;
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case 1: this.geometry.faces[element.id].b = element.value; break;
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case 2: this.geometry.faces[element.id].c = element.value; break;
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default: this.throwError("Old vertex id in EditFaceVertex must be 1, 2 or 3, but was " + element.oldIndex + 1);
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}
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this.geometry.elementsNeedUpdate = true;
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break;
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case Element.DeleteFace:
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this.geometry.faces[element.id].materialIndex = 1;
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this.geometry.elementsNeedUpdate = true;
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break;
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default:
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throw new Error("unknown element type: " + element.type);
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}
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this.currentLine++;
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}
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}
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