public static MeshPtr makeTetra(string name, string matname)
{
MeshBuilderHelper mbh = new MeshBuilderHelper(name, ResourceGroupManager.DEFAULT_RESOURCE_GROUP_NAME, false, 0, 4);
UInt32 offPos = mbh.AddElement(VertexElementType.VET_FLOAT3,
VertexElementSemantic.VES_POSITION).Offset;
UInt32 offNorm = mbh.AddElement(VertexElementType.VET_FLOAT3,
VertexElementSemantic.VES_NORMAL).Offset;
UInt32 offUV = mbh.AddElement(VertexElementType.VET_FLOAT2,
VertexElementSemantic.VES_TEXTURE_COORDINATES).Offset;
mbh.CreateVertexBuffer(4, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
int scale = 10;
// calculate corners of tetrahedron (with point of origin in middle of volume)
Single mbot = scale * 0.2f; // distance middle to bottom
Single mtop = scale * 0.62f; // distance middle to top
Single mf = scale * 0.289f; // distance middle to front
Single mb = scale * 0.577f; // distance middle to back
Single mlr = scale * 0.5f; // distance middle to left right
Mogre.Vector3[] corners = new Mogre.Vector3[4]; // corners
// width / height / depth
corners[0] = new Mogre.Vector3(-mlr, -mbot, mf); // left bottom front
corners[1] = new Mogre.Vector3(mlr, -mbot, mf); // right bottom front
corners[2] = new Mogre.Vector3(0, -mbot, -mb); // (middle) bottom back
corners[3] = new Mogre.Vector3(0, mtop, 0); // (middle) top (middle)
for (int i = 0; i < 4; i++)
{
mbh.SetVertFloat((uint)i, offPos, corners[i].x, corners[i].y, corners[i].z);
mbh.SetVertFloat((uint)i, offNorm, corners[i].NormalisedCopy.x, corners[i].NormalisedCopy.y, corners[i].NormalisedCopy.z);
mbh.SetVertFloat((uint)i, offUV, 0f, 0f);
}
mbh.CreateIndexBuffer(4, HardwareIndexBuffer.IndexType.IT_16BIT,
HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
mbh.SetIndex16bit(0, (UInt16)0, (UInt16)1, (UInt16)2);
mbh.SetIndex16bit(1, (UInt16)0, (UInt16)1, (UInt16)3);
mbh.SetIndex16bit(2, (UInt16)0, (UInt16)2, (UInt16)3);
mbh.SetIndex16bit(3, (UInt16)1, (UInt16)2, (UInt16)3);
MaterialPtr material = MaterialManager.Singleton.Create("Test/ColourTest",
ResourceGroupManager.DEFAULT_RESOURCE_GROUP_NAME);
material.GetTechnique(0).GetPass(0).VertexColourTracking =
(int)TrackVertexColourEnum.TVC_AMBIENT;
material.SetCullingMode(CullingMode.CULL_NONE);
MeshPtr m = mbh.Load("Test/ColourTest");
// MeshPtr m = mbh.Load();
m._setBounds(new AxisAlignedBox(0.0f, 0.0f, 0.0f, scale, scale, scale), false);
m._setBoundingSphereRadius((float)System.Math.Sqrt(scale * scale + scale * scale));
// the original code was missing this line:
m._setBounds(new AxisAlignedBox(new Mogre.Vector3(-scale, -scale, -scale), new Mogre.Vector3(scale, scale, scale)), false);
m._setBoundingSphereRadius(scale);
return(m);
}