/*
 * Copyright (c) 1993-1995 Argonaut Technologies Limited. All rights reserved.
 *
 * $Id: decalz.c 1.1 1995/08/31 16:52:48 sam Exp $
 * $Locker:  $
 *
 * Decal triangles
 */
#include "zb.h"
#include "shortcut.h"
#include "blockops.h"
#include "brassert.h"

static char rscid[] = "$Id: decalz.c 1.1 1995/08/31 16:52:48 sam Exp $";

void BR_ASM_CALL TriangleRenderPIZ2TAD(struct temp_vertex_fixed *v0, struct temp_vertex_fixed *v1,struct temp_vertex_fixed *v2)
{
	/*
	 * Render the undercolour
	 */
	zb.pi.current = BrIntToFixed(zb.material->index_base);
	TriangleRenderPIZ2(v0,v1,v2);

	/*
	 * Render the texture
	 */
	TriangleRenderPIZ2TA(v0,v1,v2);
}

void BR_ASM_CALL TriangleRenderPIZ2TIAD(struct temp_vertex_fixed *v0, struct temp_vertex_fixed *v1,struct temp_vertex_fixed *v2)
{
	struct temp_vertex_fixed tv[3];
	br_scalar b,r;

	/*
	 * Make copies of the temp. vertices
	 */
	tv[0] = *v0; tv[1] = *v1; tv[2] = *v2;

	/*
	 * Render the undercolour
	 */
	b = BrIntToScalar(zb.material->index_base);
	r = BR_CONST_DIV(BrIntToScalar(zb.material->index_range),256);

	tv[0].comp[C_I] = BrScalarToFixed(b + BR_MUL(r,BrFixedToScalar(v0->comp[C_I])));
	tv[1].comp[C_I] = BrScalarToFixed(b + BR_MUL(r,BrFixedToScalar(v1->comp[C_I])));
	tv[2].comp[C_I] = BrScalarToFixed(b + BR_MUL(r,BrFixedToScalar(v2->comp[C_I])));

	TriangleRenderPIZ2I(tv+0,tv+1,tv+2);

#if 1

	/*
	 * Render the texture
	 */
	r = BR_CONST_DIV(BrIntToScalar(zb.material->index_shade->height),256);

	tv[0].comp[C_I] = BrScalarToFixed(BR_MUL(r,BrFixedToScalar(v0->comp[C_I])));
	tv[1].comp[C_I] = BrScalarToFixed(BR_MUL(r,BrFixedToScalar(v1->comp[C_I])));
	tv[2].comp[C_I] = BrScalarToFixed(BR_MUL(r,BrFixedToScalar(v2->comp[C_I])));

	TriangleRenderPIZ2TIA(tv+0,tv+1,tv+2);
#endif
}