spu_tri.h File Reference

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Functions
boolean	tri_draw (const float *v0, const float *v1, const float *v2, uint tx, uint ty)
	Draw triangle into tile at (tx, ty) (tile coords) The tile data should have already been fetched.

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Function Documentation

boolean tri_draw	(	const float *	v0,
		const float *	v1,
		const float *	v2,
		uint	tx,
		uint	ty
	)

Draw triangle into tile at (tx, ty) (tile coords) The tile data should have already been fetched.

Definition at line 900 of file spu_tri.c.

{
   setup.tx = tx;
   setup.ty = ty;

   /* set clipping bounds to tile bounds */
   setup.cliprect_minx = tx * TILE_SIZE;
   setup.cliprect_miny = ty * TILE_SIZE;
   setup.cliprect_maxx = (tx + 1) * TILE_SIZE;
   setup.cliprect_maxy = (ty + 1) * TILE_SIZE;

   if (!setup_sort_vertices((struct vertex_header *) v0,
                            (struct vertex_header *) v1,
                            (struct vertex_header *) v2)) {
      return FALSE; /* totally clipped */
   }

   setup_tri_coefficients();
   setup_tri_edges();

   setup.span.y = 0;
   setup.span.y_flags = 0;
   setup.span.right[0] = 0;
   setup.span.right[1] = 0;
   /*   setup.span.z_mode = tri_z_mode( setup.ctx ); */

   /*   init_constant_attribs( setup ); */
      
   if (setup.oneoverarea < 0.0) {
      /* emaj on left:
       */
      subtriangle( &setup.emaj, &setup.ebot, setup.ebot.lines );
      subtriangle( &setup.emaj, &setup.etop, setup.etop.lines );
   }
   else {
      /* emaj on right:
       */
      subtriangle( &setup.ebot, &setup.emaj, setup.ebot.lines );
      subtriangle( &setup.etop, &setup.emaj, setup.etop.lines );
   }

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