public Sphere(int recursionLevel, IShapeDecorator decorator, bool perFaceLighting = false)
{
this.GenerateVertices(recursionLevel, perFaceLighting, 1, null, null, decorator);
}
public virtual void GenerateVertices(int recursionLevel, bool perFaceLighting, float size, Texture diffuseTexture = null, Texture specularTexture = null, IShapeDecorator decorator = null)
{
this.Meshes = new Mesh[1];
this.Materials = new Material[1];
List <TexturedVertex> verticesList = new List <TexturedVertex>();
this.middlePointIndexCache = new Dictionary <long, int>();
this.points = new List <Vector3>();
this.index = 0;
float t = (float)((1.0 + Math.Sqrt(5.0)) / 2.0);
float s = 1;
List <Face> faces = new List <Face>();
this.addVertex(new Vector3(-s, t, 0));
this.addVertex(new Vector3(s, t, 0));
this.addVertex(new Vector3(-s, -t, 0));
this.addVertex(new Vector3(s, -t, 0));
this.addVertex(new Vector3(0, -s, t));
this.addVertex(new Vector3(0, s, t));
this.addVertex(new Vector3(0, -s, -t));
this.addVertex(new Vector3(0, s, -t));
this.addVertex(new Vector3(t, 0, -s));
this.addVertex(new Vector3(t, 0, s));
this.addVertex(new Vector3(-t, 0, -s));
this.addVertex(new Vector3(-t, 0, s));
// 5 faces around point 0
faces.Add(new Face(this.points[0], this.points[11], this.points[5]));
faces.Add(new Face(this.points[0], this.points[5], this.points[1]));
faces.Add(new Face(this.points[0], this.points[1], this.points[7]));
faces.Add(new Face(this.points[0], this.points[7], this.points[10]));
faces.Add(new Face(this.points[0], this.points[10], this.points[11]));
// 5 adjacent faces
faces.Add(new Face(this.points[1], this.points[5], this.points[9]));
faces.Add(new Face(this.points[5], this.points[11], this.points[4]));
faces.Add(new Face(this.points[11], this.points[10], this.points[2]));
faces.Add(new Face(this.points[10], this.points[7], this.points[6]));
faces.Add(new Face(this.points[7], this.points[1], this.points[8]));
// 5 faces around point 3
faces.Add(new Face(this.points[3], this.points[9], this.points[4]));
faces.Add(new Face(this.points[3], this.points[4], this.points[2]));
faces.Add(new Face(this.points[3], this.points[2], this.points[6]));
faces.Add(new Face(this.points[3], this.points[6], this.points[8]));
faces.Add(new Face(this.points[3], this.points[8], this.points[9]));
// 5 adjacent faces
faces.Add(new Face(this.points[4], this.points[9], this.points[5]));
faces.Add(new Face(this.points[2], this.points[4], this.points[11]));
faces.Add(new Face(this.points[6], this.points[2], this.points[10]));
faces.Add(new Face(this.points[8], this.points[6], this.points[7]));
faces.Add(new Face(this.points[9], this.points[8], this.points[1]));
// refine triangles
for (int i = 0; i < recursionLevel; i++)
{
var faces2 = new List <Face>();
foreach (Face tri in faces)
{
// replace triangle by 4 triangles
int a = this.getMiddlePoint(tri.V1, tri.V2);
int b = this.getMiddlePoint(tri.V2, tri.V3);
int c = this.getMiddlePoint(tri.V3, tri.V1);
faces2.Add(new Face(tri.V1, this.points[a], this.points[c]));
faces2.Add(new Face(tri.V2, this.points[b], this.points[a]));
faces2.Add(new Face(tri.V3, this.points[c], this.points[b]));
faces2.Add(new Face(this.points[a], this.points[b], this.points[c]));
}
faces = faces2;
}
foreach (Face tri in faces)
{
Vector3 V1 = tri.V1;
Vector3 V2 = tri.V2;
Vector3 V3 = tri.V3;
V1 = Vector3.Multiply(V1, size);
V2 = Vector3.Multiply(V2, size);
V3 = Vector3.Multiply(V3, size);
if (decorator != null)
{
decorator.ApplyFace(ref V1, ref V2, ref V3);
}
Vector2 uv1 = V1.GetSphereCoord();
Vector2 uv2 = V2.GetSphereCoord();
Vector2 uv3 = V3.GetSphereCoord();
this.fixColorStrip(ref uv1, ref uv2, ref uv3);
if (perFaceLighting)
{
Vector3 dir = Vector3.Cross(V2 - V1, V3 - V1);
Vector3 normal = Vector3.Normalize(dir);
verticesList.Add(new TexturedVertex(V1, uv1, Color4.White, normal));
verticesList.Add(new TexturedVertex(V2, uv2, Color4.White, normal));
verticesList.Add(new TexturedVertex(V3, uv3, Color4.White, normal));
}
else
{
Vector3 normalV1 = V1.Normalized();
normalV1 = Vector3.Divide(normalV1, normalV1.Length);
Vector3 normalV2 = V2.Normalized();
normalV2 = Vector3.Divide(normalV2, normalV2.Length);
Vector3 normalV3 = V3.Normalized();
normalV3 = Vector3.Divide(normalV3, normalV3.Length);
verticesList.Add(new TexturedVertex(V1, uv1, Color4.White, normalV1));
verticesList.Add(new TexturedVertex(V2, uv2, Color4.White, normalV2));
verticesList.Add(new TexturedVertex(V3, uv3, Color4.White, normalV3));
}
}
Mesh.Primitive shapePrimitive = new Mesh.Primitive(verticesList);
this.Meshes[0] = new Mesh(shapePrimitive);
if (diffuseTexture != null)
{
if (specularTexture != null)
{
this.Materials[0] = new Material(0, diffuseTexture, specularTexture, 2);
}
else
{
this.Materials[0] = new Material(0, diffuseTexture, Color4.LightGoldenrodYellow, 2);
}
this.Materials[0].AmbientColor = Color4.DarkBlue;
}
else
{
this.Materials[0] = new Material(0, Color4.Blue, Color4.White, 2);
this.Materials[0].AmbientColor = Color4.Blue;
}
Logger.Info("Completed sphere generation! Generated vertices: " + verticesList.Count);
}
public Sphere(int recursionLevel, Texture diffuseTexture, Texture specularTexture, IShapeDecorator decorator, bool perFaceLighting = false)
{
this.GenerateVertices(recursionLevel, perFaceLighting, 1, diffuseTexture, specularTexture, decorator);
}
