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  Can anyone give me the quad transforms to make a cube?  (Read 338 times)
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Offline EnderNinja7_2

Junior Newbie





« Posted 2017-04-18 02:57:31 »

I am making a cube from quads whose verts are
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// V0
            -0.5f, 0.5f, 0.0f,
            // V1
            -0.5f, -0.5f, 0.0f,
            // V2
            0.5f, -0.5f, 0.0f,
            // V3
            0.5f, 0.5f, 0.0f,

Now I have to rotate and translate the quads to form cubes (Yes, this is a crude way to draw voxels). I have tried using Paint visualisation but it was of no use. Now can anyone give me the transfrom values?
Offline Archive
« Reply #1 - Posted 2017-04-18 03:56:21 »

"size" being the scale of the cube. 0.5 means that the cube has a length of 1 unit

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// Front Face
      ffpBegin(FFP_QUADS);
      ffpVertex3f(-size, -size, size);
      ffpVertex3f(size, -size, size);
      ffpVertex3f(size, size, size);
      ffpVertex3f(-size, size, size);
      // Back Face
      ffpVertex3f(-size, -size, -size);
      ffpVertex3f(-size, size, -size);
      ffpVertex3f(size, size, -size);
      ffpVertex3f(size, -size, -size);
      // Top Face
      ffpVertex3f(-size, size, -size);
      ffpVertex3f(-size, size, size);
      ffpVertex3f(size, size, size);
      ffpVertex3f(size, size, -size);
      // Bottom Face
      ffpVertex3f(-size, -size, -size);
      ffpVertex3f(size, -size, -size);
      ffpVertex3f(size, -size, size);
      ffpVertex3f(-size, -size, size);
      // Right face
      ffpVertex3f(size, -size, -size);
      ffpVertex3f(size, size, -size);
      ffpVertex3f(size, size, size);
      ffpVertex3f(size, -size, size);
      // Left Face
      ffpVertex3f(-size, -size, -size);
      ffpVertex3f(-size, -size, size);
      ffpVertex3f(-size, size, size);
      ffpVertex3f(-size, size, -size);

Offline aaron2017

Innocent Bystander





« Reply #2 - Posted 2017-04-18 07:13:13 »

agree with this solution  Cool

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