398 lines
13 KiB
JavaScript
398 lines
13 KiB
JavaScript
OV.GeneratorParams = class
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{
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constructor ()
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{
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this.name = null;
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this.material = null;
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this.transformation = null;
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}
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SetName (name)
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{
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this.name = name;
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return this;
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}
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SetMaterial (material)
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{
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this.material = material;
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return this;
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}
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SetTransformation (translation, rotation, scale)
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{
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const matrix = new OV.Matrix ().ComposeTRS (translation, rotation, scale);
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return this.SetTransformationMatrix (matrix);
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}
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SetTransformationMatrix (matrix)
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{
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this.transformation = new OV.Transformation (matrix);
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return this;
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}
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};
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OV.Generator = class
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{
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constructor (params)
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{
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this.params = params || new OV.GeneratorParams ();
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this.mesh = new OV.Mesh ();
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if (this.params.name !== null) {
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this.mesh.SetName (this.params.name);
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}
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this.curve = null;
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}
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GetMesh ()
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{
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return this.mesh;
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}
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AddVertex (x, y, z)
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{
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let coord = new OV.Coord3D (x, y, z);
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if (this.params.transformation !== null) {
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coord = this.params.transformation.TransformCoord3D (coord);
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}
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return this.mesh.AddVertex (coord);
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}
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AddVertices (vertices)
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{
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let indices = [];
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for (let i = 0; i < vertices.length; i++) {
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let vertex = vertices[i];
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indices.push (this.AddVertex (vertex.x, vertex.y, vertex.z));
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}
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return indices;
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}
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SetCurve (curve)
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{
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this.curve = curve;
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}
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ResetCurve ()
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{
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this.curve = null;
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}
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AddTriangle (v0, v1, v2)
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{
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let triangle = new OV.Triangle (v0, v1, v2);
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if (this.params.material !== null) {
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triangle.SetMaterial (this.params.material);
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}
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if (this.curve !== null) {
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triangle.SetCurve (this.curve);
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}
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return this.mesh.AddTriangle (triangle);
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}
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AddTriangleInverted (v0, v1, v2)
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{
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this.AddTriangle (v0, v2, v1);
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}
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AddConvexPolygon (vertices)
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{
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for (let vertexIndex = 0; vertexIndex < vertices.length - 2; vertexIndex++) {
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this.AddTriangle (
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vertices[0],
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vertices[vertexIndex + 1],
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vertices[vertexIndex + 2]
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);
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}
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}
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AddConvexPolygonInverted (vertices)
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{
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for (let vertexIndex = 0; vertexIndex < vertices.length - 2; vertexIndex++) {
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this.AddTriangleInverted (
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vertices[0],
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vertices[vertexIndex + 1],
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vertices[vertexIndex + 2]
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);
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}
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}
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};
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OV.GeneratorHelper = class
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{
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constructor (generator)
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{
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this.generator = generator;
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}
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GenerateExtrude (vertices, height, curve)
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{
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let topPolygon = [];
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let bottomPolygon = [];
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for (let i = 0; i < vertices.length; i++) {
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const vertex = vertices[i];
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bottomPolygon.push (this.generator.AddVertex (vertex.x, vertex.y, 0.0));
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topPolygon.push (this.generator.AddVertex (vertex.x, vertex.y, height));
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}
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this.generator.SetCurve (curve);
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this.GenerateSurfaceBetweenPolygons (bottomPolygon, topPolygon);
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this.generator.ResetCurve ();
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this.generator.AddConvexPolygonInverted (bottomPolygon);
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this.generator.AddConvexPolygon (topPolygon);
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}
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GenerateSurfaceBetweenPolygons (startIndices, endIndices)
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{
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if (startIndices.length !== endIndices.length) {
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return;
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}
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const vertexCount = startIndices.length;
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for (let i = 0; i < vertexCount; i++) {
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const index = i;
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const nextIndex = (i < vertexCount - 1) ? index + 1 : 0;
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this.generator.AddConvexPolygon ([
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startIndices[index],
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startIndices[nextIndex],
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endIndices[nextIndex],
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endIndices[index]
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]);
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}
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}
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GenerateTriangleFan (startIndices, endIndex)
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{
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const vertexCount = startIndices.length;
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for (let i = 0; i < vertexCount; i++) {
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const index = i;
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const nextIndex = (i < vertexCount - 1) ? index + 1 : 0;
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this.generator.AddTriangle (
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endIndex,
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startIndices[index],
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startIndices[nextIndex]
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);
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}
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}
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};
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OV.GenerateCuboid = function (genParams, xSize, ySize, zSize)
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{
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let generator = new OV.Generator (genParams);
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let vertices = [
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new OV.Coord2D (0.0, 0.0),
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new OV.Coord2D (xSize, 0.0),
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new OV.Coord2D (xSize, ySize),
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new OV.Coord2D (0.0, ySize),
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];
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let helper = new OV.GeneratorHelper (generator);
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helper.GenerateExtrude (vertices, zSize, null);
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return generator.GetMesh ();
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};
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OV.GenerateCylinder = function (genParams, radius, height, segments, smooth)
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{
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function GetCylindricalCoord (radius, angle)
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{
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return new OV.Coord2D (
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radius * Math.cos (angle),
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radius * Math.sin (angle)
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);
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}
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if (segments < 3) {
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return null;
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}
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let generator = new OV.Generator (genParams);
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let baseVertices = [];
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const step = 2.0 * Math.PI / segments;
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for (let i = 0; i < segments; i++) {
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let cylindrical = GetCylindricalCoord (radius, i * step);
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baseVertices.push (cylindrical);
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}
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let helper = new OV.GeneratorHelper (generator);
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helper.GenerateExtrude (baseVertices, height, smooth ? 1 : null);
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return generator.GetMesh ();
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};
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OV.GenerateSphere = function (genParams, radius, segments, smooth)
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{
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function GetSphericalCoord (radius, theta, phi)
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{
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return new OV.Coord3D (
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radius * Math.sin (theta) * Math.cos (phi),
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radius * Math.sin (theta) * Math.sin (phi),
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radius * Math.cos (theta)
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);
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}
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if (segments < 3) {
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return null;
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}
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let generator = new OV.Generator (genParams);
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let helper = new OV.GeneratorHelper (generator);
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generator.SetCurve (smooth ? 1 : null);
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let allLevelVertices = [];
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let levels = segments + 1;
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const levelStep = Math.PI / segments;
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const cylindricalStep = 2.0 * Math.PI / segments;
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for (let levelIndex = 1; levelIndex < levels - 1; levelIndex++) {
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let levelVertices = [];
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let theta = levelIndex * levelStep;
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for (let cylindricalIndex = 0; cylindricalIndex < segments; cylindricalIndex++) {
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let phi = cylindricalIndex * cylindricalStep;
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let vertex = GetSphericalCoord (radius, theta, -phi);
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levelVertices.push (generator.AddVertex (vertex.x, vertex.y, vertex.z));
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}
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if (levelIndex > 1) {
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helper.GenerateSurfaceBetweenPolygons (allLevelVertices[allLevelVertices.length - 1], levelVertices);
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}
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allLevelVertices.push (levelVertices);
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}
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let topVertex = generator.AddVertex (0.0, 0.0, radius);
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let bottomVertex = generator.AddVertex (0.0, 0.0, -radius);
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helper.GenerateTriangleFan (allLevelVertices[0].slice ().reverse (), topVertex);
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helper.GenerateTriangleFan (allLevelVertices[allLevelVertices.length - 1], bottomVertex);
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generator.ResetCurve ();
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return generator.GetMesh ();
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};
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OV.GeneratePlatonicSolid = function (genParams, type, radius)
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{
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function AddVertex (generator, radius, x, y, z)
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{
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let vertex = new OV.Coord3D (x, y, z);
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vertex.MultiplyScalar (radius / vertex.Length ());
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generator.AddVertex (vertex.x, vertex.y, vertex.z);
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}
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if (OV.IsZero (radius)) {
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return null;
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}
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let generator = new OV.Generator (genParams);
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if (type === 'tetrahedron') {
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let a = 1.0;
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AddVertex (generator, radius, +a, +a, +a);
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AddVertex (generator, radius, -a, -a, +a);
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AddVertex (generator, radius, -a, +a, -a);
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AddVertex (generator, radius, +a, -a, -a);
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generator.AddTriangle (0, 1, 3);
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generator.AddTriangle (0, 2, 1);
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generator.AddTriangle (0, 3, 2);
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generator.AddTriangle (1, 2, 3);
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} else if (type === 'hexahedron') {
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let a = 1.0;
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AddVertex (generator, radius, +a, +a, +a);
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AddVertex (generator, radius, +a, +a, -a);
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AddVertex (generator, radius, +a, -a, +a);
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AddVertex (generator, radius, +a, -a, -a);
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AddVertex (generator, radius, -a, +a, +a);
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AddVertex (generator, radius, -a, +a, -a);
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AddVertex (generator, radius, -a, -a, +a);
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AddVertex (generator, radius, -a, -a, -a);
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generator.AddConvexPolygon ([0, 1, 5, 4]);
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generator.AddConvexPolygon ([0, 2, 3, 1]);
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generator.AddConvexPolygon ([0, 4, 6, 2]);
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generator.AddConvexPolygon ([1, 3, 7, 5]);
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generator.AddConvexPolygon ([2, 6, 7, 3]);
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generator.AddConvexPolygon ([4, 5, 7, 6]);
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} else if (type === 'octahedron') {
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let a = 1.0;
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let b = 0.0;
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AddVertex (generator, radius, +a, +b, +b);
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AddVertex (generator, radius, -a, +b, +b);
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AddVertex (generator, radius, +b, +a, +b);
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AddVertex (generator, radius, +b, -a, +b);
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AddVertex (generator, radius, +b, +b, +a);
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AddVertex (generator, radius, +b, +b, -a);
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generator.AddTriangle (0, 2, 4);
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generator.AddTriangle (0, 3, 5);
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generator.AddTriangle (0, 4, 3);
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generator.AddTriangle (0, 5, 2);
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generator.AddTriangle (1, 2, 5);
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generator.AddTriangle (1, 3, 4);
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generator.AddTriangle (1, 4, 2);
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generator.AddTriangle (1, 5, 3);
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} else if (type === 'dodecahedron') {
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let a = 1.0;
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let b = 0.0;
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let c = (1.0 + Math.sqrt (5.0)) / 2.0;
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let d = 1.0 / c;
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AddVertex (generator, radius, +a, +a, +a);
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AddVertex (generator, radius, +a, +a, -a);
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AddVertex (generator, radius, +a, -a, +a);
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AddVertex (generator, radius, -a, +a, +a);
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AddVertex (generator, radius, +a, -a, -a);
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AddVertex (generator, radius, -a, +a, -a);
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AddVertex (generator, radius, -a, -a, +a);
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AddVertex (generator, radius, -a, -a, -a);
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AddVertex (generator, radius, +b, +d, +c);
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AddVertex (generator, radius, +b, +d, -c);
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AddVertex (generator, radius, +b, -d, +c);
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AddVertex (generator, radius, +b, -d, -c);
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AddVertex (generator, radius, +d, +c, +b);
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AddVertex (generator, radius, +d, -c, +b);
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AddVertex (generator, radius, -d, +c, +b);
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AddVertex (generator, radius, -d, -c, +b);
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AddVertex (generator, radius, +c, +b, +d);
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AddVertex (generator, radius, -c, +b, +d);
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AddVertex (generator, radius, +c, +b, -d);
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AddVertex (generator, radius, -c, +b, -d);
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generator.AddConvexPolygon ([0, 8, 10, 2, 16]);
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generator.AddConvexPolygon ([0, 16, 18, 1, 12]);
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generator.AddConvexPolygon ([0, 12, 14, 3, 8]);
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generator.AddConvexPolygon ([1, 9, 5, 14, 12]);
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generator.AddConvexPolygon ([1, 18, 4, 11, 9]);
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generator.AddConvexPolygon ([2, 10, 6, 15, 13]);
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generator.AddConvexPolygon ([2, 13, 4, 18, 16]);
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generator.AddConvexPolygon ([3, 14, 5, 19, 17]);
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generator.AddConvexPolygon ([3, 17, 6, 10, 8]);
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generator.AddConvexPolygon ([4, 13, 15, 7, 11]);
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generator.AddConvexPolygon ([5, 9, 11, 7, 19]);
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generator.AddConvexPolygon ([6, 17, 19, 7, 15]);
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} else if (type === 'icosahedron') {
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let a = 1.0;
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let b = 0.0;
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let c = (1.0 + Math.sqrt (5.0)) / 2.0;
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AddVertex (generator, radius, +b, +a, +c);
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AddVertex (generator, radius, +b, +a, -c);
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AddVertex (generator, radius, +b, -a, +c);
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AddVertex (generator, radius, +b, -a, -c);
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AddVertex (generator, radius, +a, +c, +b);
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AddVertex (generator, radius, +a, -c, +b);
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AddVertex (generator, radius, -a, +c, +b);
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AddVertex (generator, radius, -a, -c, +b);
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AddVertex (generator, radius, +c, +b, +a);
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AddVertex (generator, radius, +c, +b, -a);
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AddVertex (generator, radius, -c, +b, +a);
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AddVertex (generator, radius, -c, +b, -a);
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generator.AddTriangle (0, 2, 8);
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generator.AddTriangle (0, 4, 6);
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generator.AddTriangle (0, 6, 10);
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generator.AddTriangle (0, 8, 4);
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generator.AddTriangle (0, 10, 2);
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generator.AddTriangle (1, 3, 11);
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generator.AddTriangle (1, 4, 9);
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generator.AddTriangle (1, 6, 4);
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generator.AddTriangle (1, 9, 3);
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generator.AddTriangle (1, 11, 6);
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generator.AddTriangle (2, 5, 8);
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generator.AddTriangle (2, 7, 5);
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generator.AddTriangle (2, 10, 7);
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generator.AddTriangle (3, 5, 7);
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generator.AddTriangle (3, 7, 11);
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generator.AddTriangle (3, 9, 5);
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generator.AddTriangle (4, 8, 9);
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generator.AddTriangle (5, 9, 8);
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generator.AddTriangle (6, 11, 10);
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generator.AddTriangle (7, 10, 11);
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}
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return generator.GetMesh ();
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};
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