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remove unneeded casts, added comments
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1deafdb1de
commit
6aa9c8ebc1
1 changed files with 5 additions and 5 deletions
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@ -64,19 +64,19 @@ static void cull_tri( struct prim_stage *stage,
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struct prim_header *header )
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{
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/* Window coords: */
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GLfloat *v0 = (GLfloat *)&(header->v[0]->data[0]);
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GLfloat *v1 = (GLfloat *)&(header->v[1]->data[0]);
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GLfloat *v2 = (GLfloat *)&(header->v[2]->data[0]);
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const GLfloat *v0 = header->v[0]->data[0];
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const GLfloat *v1 = header->v[1]->data[0];
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const GLfloat *v2 = header->v[2]->data[0];
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/* edge vectors e = v0 - v2, f = v1 - v2 */
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GLfloat ex = v0[0] - v2[0];
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GLfloat ey = v0[1] - v2[1];
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GLfloat fx = v1[0] - v2[0];
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GLfloat fy = v1[1] - v2[1];
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/* det = cross(e,f).z */
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header->det = ex * fy - ey * fx;
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_mesa_printf("%s %f\n", __FUNCTION__, header->det );
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if (header->det != 0) {
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/* non-zero area */
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GLuint mode = (header->det < 0) ? PIPE_WINDING_CW : PIPE_WINDING_CCW;
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