public static ShapeData CreateSphere(int slices, int stacks, float radius, Color color)
{
ShapeData shapeData = new ShapeData((slices + 1) * (stacks + 1), (slices * stacks * 6));
float phi = 0f;
float theta = 0f; ;
float deltaPhi = MathHelper.Pi / stacks;
float dtheta = MathHelper.TwoPi / slices;
float x, y, z, sc;
short index = 0;
for (int stack = 0; stack <= stacks; stack++)
{
phi = MathHelper.PiOver2 - (stack * deltaPhi);
y = radius * (float)Math.Sin(phi);
sc = -radius * (float)Math.Cos(phi);
for (int slice = 0; slice <= slices; slice++)
{
theta = slice * dtheta;
x = sc * (float)Math.Sin(theta);
z = sc * (float)Math.Cos(theta);
//s_sphereVertices[index++] = new VertexPositionNormalTexture(new IndexedVector3(x, y, z),
// new IndexedVector3(x, y, z),
// new Vector2((float)slice / (float)slices, (float)stack / (float)stacks));
shapeData.m_verticesArray[index++] = new VertexPositionColor(new Vector3(x, y, z), color);
}
}
int stride = slices + 1;
index = 0;
for (int stack = 0; stack < stacks; stack++)
{
for (int slice = 0; slice < slices; slice++)
{
shapeData.m_indexList[index++] = (short)((stack + 0) * stride + slice);
shapeData.m_indexList[index++] = (short)((stack + 1) * stride + slice);
shapeData.m_indexList[index++] = (short)((stack + 0) * stride + slice + 1);
shapeData.m_indexList[index++] = (short)((stack + 0) * stride + slice + 1);
shapeData.m_indexList[index++] = (short)((stack + 1) * stride + slice);
shapeData.m_indexList[index++] = (short)((stack + 1) * stride + slice + 1);
}
}
return shapeData;
}
public static ShapeData CreateBox(IndexedVector3 position, IndexedVector3 sideLength, Color color, ref IndexedMatrix transform)
{
ShapeData shapeData = new ShapeData(8, 36);
int index = 0;
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(0, 0, 0))).ToVector3(), color);
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(sideLength.X, 0, 0))).ToVector3(), color);
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(sideLength.X, 0, sideLength.Z))).ToVector3(), color);
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(0, 0, sideLength.Z))).ToVector3(), color);
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(0, sideLength.Y, 0))).ToVector3(), color);
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(sideLength.X, sideLength.Y, 0))).ToVector3(), color);
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(sideLength.X, sideLength.Y, sideLength.Z))).ToVector3(), color);
shapeData.m_verticesArray[index++] = new VertexPositionColor((transform * (position + new IndexedVector3(0, sideLength.Y, sideLength.Z))).ToVector3(), color);
shapeData.m_indexArray = DrawHelper.s_cubeIndices;
return shapeData;
}
