66 lines
2.1 KiB
JavaScript
66 lines
2.1 KiB
JavaScript
class Model extends THREE.Mesh {
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constructor() {
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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.vertices = [];
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}
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manageElement(element) {
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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.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.AddFace:
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let vertices = this.geometry.vertices;
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let f = element.value;
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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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this.geometry.elementsNeedUpdate = true;
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break;
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case Element.EditFace:
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vertices = this.geometry.vertices;
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f = element.value;
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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.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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}
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}
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