Apply texture to single cube face

Blitz3D Forums/Blitz3D Programming/Apply texture to single cube face

GR	(Posted 2004) [#1]

Hi,

After creating a cube using CreateCube(), I was wondering if anybody knows how to just texture a single face rather than have the texture be applied to all faces?

Thanks

Warren

(Posted 2004) [#2]

The entire mesh is using the same surface when you use CreateCube, so without looping through its vertices/surfaces and breaking out the face you want onto its own surface - no, you can't.

Beaker

(Posted 2004) [#3]

Write your own MyCreateCube() function that creates multiple surfaces.

Ziltch

(Posted 2004) [#4]

I did this function a while back. It could be helpful to you.

It was designed to have the front surface change, but it would be easy to modify it so all the faces could be textured differently.

Function createscreen(frntbrush,genbrush=0,parent=0)
  mesh=CreateMesh(parent)
  If genbrsh=0 Then genbrsh=frntbrsh

  fsurf=CreateSurface(mesh,frntbrush)
  AddVertex fsurf,-.5,-.5,.5,1,1;0
  AddVertex fsurf,-.5,.5,.5,1,0;1
  AddVertex fsurf,.5,.5,.5,0,0;2
  AddVertex fsurf,.5,-.5,.5,0,1;3

  AddTriangle (fsurf,2,1,0);front
  AddTriangle (fsurf,3,2,0)

  gsurf=CreateSurface(mesh,genbrush)
  AddVertex gsurf,-.5,-.5,.5,0,0;0
  AddVertex gsurf,-.5,.5,.5,0,1;1
  AddVertex gsurf,.5,.5,.5,1,1;2
  AddVertex gsurf,.5,-.5,.5,1,0;3
  AddVertex gsurf,-.5,-.5,-.5,0,0;4
  AddVertex gsurf,-.5,.5,-.5,0,1;5
  AddVertex gsurf,.5,.5,-.5,1,1;6
  AddVertex gsurf,.5,-.5,-.5,1,0;7

  AddTriangle (gsurf,4,5,7);back
  AddTriangle (gsurf,5,6,7)

  AddTriangle (gsurf,7,2,3);rside
  AddTriangle (gsurf,6,2,7)

  AddTriangle (gsurf,1,5,4);lside
  AddTriangle (gsurf,0,1,4)

  AddTriangle (gsurf,1,6,5);top
  AddTriangle (gsurf,1,2,6)

  AddTriangle (gsurf,4,7,0);bottom
  AddTriangle (gsurf,7,3,0)

  UpdateNormals mesh
  Return mesh

End Function

GR	(Posted 2004) [#5]

Thanks for the example Ziltch. Much appreciated. If I create a cube in say Truespace and export it as an .x object then load into into Blitz, does this change anything? I have a stretched cube object that I want to have a metallic texture on all sides but the front. On the front I want to use a different texture that will "scroll" using PositionTexture UV offsets. The effect I am after is that of one of those scrolling LED sign things. I can load my pre-textured cube object into B3D and it appears fine with the various textures on the correct faces but I have no idea how to access and offset the texture on my front face to get the desired "scrolling" effect. Does this make sense?

AntonyWells

(Posted 2004) [#6]

You could pack textures. Check my 'leaf texture packer' archive. you could simply pack the two textures into 1 and then achieve what you want through u,v mapping. (It includes funcs to make it easy).