private static Mesh BuildConvexRamp(MeshBuilder mb, ContentManager c)
{
mb.Begin();
//mb.AddQuad(new Vector3(-0.5f, 0.5f, -0.5f), new Vector3(-0.5f, 0.5f, 0.5f), new Vector3(-0.5f, -0.5f, 0.5f), new Vector3(-0.5f, -0.5f, -0.5f), false);
mb.AddQuad(new Vector3(0.5f, 0.5f, -0.5f), new Vector3(-0.5f, 0.5f, -0.5f), new Vector3(-0.5f, -0.5f, -0.5f), new Vector3(0.5f, -0.5f, -0.5f), false, left[0], left[1], left[2], left[3]);
mb.AddQuad(new Vector3(-0.5f, -0.5f, 0.5f), new Vector3(0.5f, -0.5f, 0.5f), new Vector3(0.5f, -0.5f, -0.5f), new Vector3(-0.5f, -0.5f, -0.5f), false, bottom[0], bottom[1], bottom[2], bottom[3]);
for (int i = 0; i < sphereIterations; i++)
{
//Draw the curved surface, and the two sides
float angle = ((float)i / sphereIterations) * MathHelper.PiOver2;
float nextAngle = ((float)(i + 1) / sphereIterations) * MathHelper.PiOver2;
Vector3 offset = new Vector3(-0.5f);
Vector3 v1 = new Vector3(0, (float)Math.Cos(angle), (float)Math.Sin(angle)) + offset;
Vector3 v2 = new Vector3(1, (float)Math.Cos(angle), (float)Math.Sin(angle)) + offset;
Vector3 v3 = new Vector3(1, (float)Math.Cos(nextAngle), (float)Math.Sin(nextAngle)) + offset;
Vector3 v4 = new Vector3(0, (float)Math.Cos(nextAngle), (float)Math.Sin(nextAngle)) + offset;
mb.AddQuad(v1, v2, v3, v4, true, new Vector2(0.5f, i * (0.5f / sphereIterations)), new Vector2(1, (i + 1) * (0.5f / sphereIterations)));
//Draw the two sides
v1 = new Vector3(1, 0, 0) + offset;
v2 = new Vector3(1, (float)Math.Cos(nextAngle), (float)Math.Sin(nextAngle)) + offset;
v3 = new Vector3(1, (float)Math.Cos(angle), (float)Math.Sin(angle)) + offset;
//calculate texture coordinates
Vector2 v1Tex = new Vector2(v1.Z + .5f, -v1.Y + .5f);
Vector2 v2Tex = new Vector2(v2.Z + .5f, -v2.Y + .5f);
Vector2 v3Tex = new Vector2(v3.Z + .5f, -v3.Y + .5f);
v1Tex /= 2;
v2Tex /= 2;
v3Tex /= 2;
//add back side
mb.AddTriangle(v1, v2, v3, new Vector2(v1Tex.X + .5f, v1Tex.Y + .5f), new Vector2(v2Tex.X + .5f, v2Tex.Y + .5f), new Vector2(v3Tex.X + .5f, v3Tex.Y + .5f), false);
offset = new Vector3(-1, 0, 0);
//add front side
mb.AddTriangle(v1 + offset, v3 + offset, v2 + offset, new Vector2(v1Tex.X + .5f, v1Tex.Y + .5f), new Vector2(v3Tex.X + .5f, v3Tex.Y + .5f), new Vector2(v2Tex.X + .5f, v2Tex.Y + .5f), false);
}
mb.RotateAllVerts(Quaternion.CreateFromAxisAngle(Vector3.Up, MathHelper.PiOver2));
Mesh m = mb.End();
m.Texture = c.Load<Texture2D>("Textures/BlockTextures/Block5");
m.NormalMap = c.Load<Texture2D>("Textures/BlockTextures/Block5N");
return m;
}