Sphere Mesh, advice on how to texture and rotate it
by Ryan Mick · in Torque 3D Professional · 03/31/2010 (2:51 pm) · 5 replies
I am looking into applying a texture to a sphere mesh that is being rendered in a gui control. THe code that actually renders the mesh is:
What I want to do is first apply a texture to the mesh, which I think can be done by calling GFX->setTexture before calling drawPrimitives but I am not sure. I looked through the source code for an example of this but could not find any.
Secondly, after the texture is applied I want to rotate the sphere mesh. The rotation will eventually be based on the players transform.
The end result I am trying to achieve is to create a compass/artificial horizon effect for the updated GuiRadarTSCtrl. Any help in pointing me in the right direction would be greatly appreciated.
Thanks,
Ryan
const Sphere::TriangleMesh *sphereMesh = sphere.getMesh(mSphereDetail);
S32 numPoly = sphereMesh->numPoly;
S32 totalPoly = 0;
GFXVertexBufferHandle<GFXVertexPC> verts(GFX, numPoly*3, GFXBufferTypeVolatile);
verts.lock();
S32 vertexIndex = 0;
for (S32 i=0; i<numPoly; i++)
{
totalPoly++;
verts[vertexIndex].point = sphereMesh->poly[i].pnt[0];
verts[vertexIndex].color = mSphereColor;
vertexIndex++;
verts[vertexIndex].point = sphereMesh->poly[i].pnt[1];
verts[vertexIndex].color = mSphereColor;
vertexIndex++;
verts[vertexIndex].point = sphereMesh->poly[i].pnt[2];
verts[vertexIndex].color = mSphereColor;
vertexIndex++;
}
verts.unlock();
GFXStateBlockDesc desc2;
desc2.setCullMode(GFXCullNone);
desc2.zEnable = false;
desc2.setBlend(true, GFXBlendSrcAlpha, GFXBlendInvSrcAlpha);
GFX->setStateBlockByDesc( desc2 );
GFX->setupGenericShaders( GFXDevice::GSColor );
GFX->setVertexBuffer( verts );
GFX->drawPrimitive( GFXTriangleList, 0, totalPoly );What I want to do is first apply a texture to the mesh, which I think can be done by calling GFX->setTexture before calling drawPrimitives but I am not sure. I looked through the source code for an example of this but could not find any.
Secondly, after the texture is applied I want to rotate the sphere mesh. The rotation will eventually be based on the players transform.
The end result I am trying to achieve is to create a compass/artificial horizon effect for the updated GuiRadarTSCtrl. Any help in pointing me in the right direction would be greatly appreciated.
Thanks,
Ryan
#2
09/04/2010 (9:43 pm)
**Bump** 
#3
09/07/2010 (11:45 pm)
From memory the sphere generator doesn't do texture coordinates. But assuming you can generate those, you'd want to change your vertex buffer to a GFXVertexPCT (Point-Colour-TexCoord) and set the uvs per vertex, then ensure your state block has samplers enabled and use GFX->setTexture to set the texture prior to drawing the primitives.
#4
My suggestion would be to have an artist create a mesh and instead use TSShapeInstance to render your compass from your GUI control.
09/08/2010 (4:55 pm)
@RyanMy suggestion would be to have an artist create a mesh and instead use TSShapeInstance to render your compass from your GUI control.
#5
@Tom, interesting idea. Are there any examples in the code currently where this is done? I like to learn by example, so if you can point me in the right direction that would be great. Looks like guiShapeEdPreview may have some good examples though.
09/08/2010 (9:21 pm)
@Daniel, thanks for the tip. I think I can determine the texture coordinates with a little work.@Tom, interesting idea. Are there any examples in the code currently where this is done? I like to learn by example, so if you can point me in the right direction that would be great. Looks like guiShapeEdPreview may have some good examples though.
Torque Owner Ryan Mick
Red Witch Entertainment