/*
================
R_AliasPrepareUnclippedPoints
================
*/
void R_AliasPrepareUnclippedPoints (void)
{
stvert_t *pstverts;
finalvert_t *fv;
mtriangle_t *ptri;
int i;
pstverts = (stvert_t *)((byte *)paliashdr + paliashdr->stverts);
r_anumverts = pmdl->numverts;
// FIXME: just use pfinalverts directly?
fv = pfinalverts;
R_AliasTransformAndProjectFinalVerts (fv, pstverts);
r_affinetridesc.pfinalverts = pfinalverts;
r_affinetridesc.ptriangles = (mtriangle_t *)
((byte *)paliashdr + paliashdr->triangles);
r_affinetridesc.numtriangles = 1;//pmdl->numtris;
ptri = (mtriangle_t *)((byte *)paliashdr + paliashdr->triangles);
for (i = 0 ; i < pmdl->numtris ; i++, ptri++)
{
finalvert_t *pfv[3];
pfv[0] = &pfinalverts[ptri->vertindex[0]];
pfv[1] = &pfinalverts[ptri->vertindex[1]];
pfv[2] = &pfinalverts[ptri->vertindex[2]];
//jfm: fill in the triangles s and t into the finalvert
pfv[0]->v[2] = pstverts[ptri->stindex[0]].s;
pfv[0]->v[3] = pstverts[ptri->stindex[0]].t;
pfv[0]->flags = pstverts[ptri->stindex[0]].onseam;
pfv[1]->v[2] = pstverts[ptri->stindex[1]].s;
pfv[1]->v[3] = pstverts[ptri->stindex[1]].t;
pfv[1]->flags = pstverts[ptri->stindex[1]].onseam;
pfv[2]->v[2] = pstverts[ptri->stindex[2]].s;
pfv[2]->v[3] = pstverts[ptri->stindex[2]].t;
pfv[2]->flags = pstverts[ptri->stindex[2]].onseam;
r_affinetridesc.ptriangles = ptri;
if (r_affinetridesc.drawtype)
{
if ((currententity->model->flags & EF_SPECIAL_TRANS))
{
D_PolysetDrawFinalVertsT5 (pfv[0],pfv[1],pfv[2]);
D_PolysetDrawT5 ();
}
else if (currententity->drawflags & DRF_TRANSLUCENT)
{
D_PolysetDrawFinalVertsT (pfv[0],pfv[1],pfv[2]);
D_PolysetDrawT ();
}
else if ((currententity->model->flags & EF_TRANSPARENT))
{
D_PolysetDrawFinalVertsT2 (pfv[0],pfv[1],pfv[2]);
D_PolysetDrawT2 ();
}
else if ((currententity->model->flags & EF_HOLEY))
{
D_PolysetDrawFinalVertsT3 (pfv[0],pfv[1],pfv[2]);
D_PolysetDrawT3 ();
}
else
{
D_PolysetDrawFinalVerts (pfv[0],pfv[1],pfv[2]);
D_PolysetDraw ();
}
}
else
{
if ((currententity->model->flags & EF_SPECIAL_TRANS))
D_PolysetDrawT5 ();
else if (currententity->drawflags & DRF_TRANSLUCENT)
D_PolysetDrawT ();
else if ((currententity->model->flags & EF_TRANSPARENT))
D_PolysetDrawT2 ();
else if ((currententity->model->flags & EF_HOLEY))
D_PolysetDrawT3 ();
else
D_PolysetDraw ();
}
}
}
/*
================
R_AliasClipTriangle
================
*/
void R_AliasClipTriangle (mtriangle_t *ptri)
{
int i, k, pingpong;
mtriangle_t mtri;
unsigned int clipflags;
// copy vertexes and fix seam texture coordinates
if (ptri->facesfront)
{
fv[0][0] = pfinalverts[ptri->vertindex[0]];
fv[0][1] = pfinalverts[ptri->vertindex[1]];
fv[0][2] = pfinalverts[ptri->vertindex[2]];
}
else
{
for (i = 0; i < 3; i++)
{
fv[0][i] = pfinalverts[ptri->vertindex[i]];
if (fv[0][i].flags & ALIAS_ONSEAM)
fv[0][i].v[2] += r_affinetridesc.seamfixupX16;
}
}
// clip
clipflags = fv[0][0].flags | fv[0][1].flags | fv[0][2].flags;
if (clipflags & ALIAS_Z_CLIP)
{
for (i = 0; i < 3; i++)
av[i] = pauxverts[ptri->vertindex[i]];
k = R_AliasClip (fv[0], fv[1], ALIAS_Z_CLIP, 3, R_Alias_clip_z);
if (k == 0)
return;
pingpong = 1;
clipflags = fv[1][0].flags | fv[1][1].flags | fv[1][2].flags;
}
else
{
pingpong = 0;
k = 3;
}
if (clipflags & ALIAS_LEFT_CLIP)
{
k = R_AliasClip (fv[pingpong], fv[pingpong ^ 1],
ALIAS_LEFT_CLIP, k, R_Alias_clip_left);
if (k == 0)
return;
pingpong ^= 1;
}
if (clipflags & ALIAS_RIGHT_CLIP)
{
k = R_AliasClip (fv[pingpong], fv[pingpong ^ 1],
ALIAS_RIGHT_CLIP, k, R_Alias_clip_right);
if (k == 0)
return;
pingpong ^= 1;
}
if (clipflags & ALIAS_BOTTOM_CLIP)
{
k = R_AliasClip (fv[pingpong], fv[pingpong ^ 1],
ALIAS_BOTTOM_CLIP, k, R_Alias_clip_bottom);
if (k == 0)
return;
pingpong ^= 1;
}
if (clipflags & ALIAS_TOP_CLIP)
{
k = R_AliasClip (fv[pingpong], fv[pingpong ^ 1],
ALIAS_TOP_CLIP, k, R_Alias_clip_top);
if (k == 0)
return;
pingpong ^= 1;
}
for (i = 0; i < k; i++)
{
if (fv[pingpong][i].v[0] < r_refdef.aliasvrect.x)
fv[pingpong][i].v[0] = r_refdef.aliasvrect.x;
else if (fv[pingpong][i].v[0] > r_refdef.aliasvrectright)
fv[pingpong][i].v[0] = r_refdef.aliasvrectright;
if (fv[pingpong][i].v[1] < r_refdef.aliasvrect.y)
fv[pingpong][i].v[1] = r_refdef.aliasvrect.y;
else if (fv[pingpong][i].v[1] > r_refdef.aliasvrectbottom)
fv[pingpong][i].v[1] = r_refdef.aliasvrectbottom;
fv[pingpong][i].flags = 0;
}
// draw triangles
mtri.facesfront = ptri->facesfront;
r_affinetridesc.ptriangles = &mtri;
r_affinetridesc.pfinalverts = fv[pingpong];
// FIXME: do all at once as trifan?
mtri.vertindex[0] = 0;
for (i = 1; i < k - 1; i++)
{
mtri.vertindex[1] = i;
mtri.vertindex[2] = i+1;
if ((currententity->model->flags & EF_SPECIAL_TRANS))
D_PolysetDrawT5 ();
else if (currententity->drawflags & DRF_TRANSLUCENT)
D_PolysetDrawT ();
else if ((currententity->model->flags & EF_TRANSPARENT))
D_PolysetDrawT2 ();
else if ((currententity->model->flags & EF_HOLEY))
D_PolysetDrawT3 ();
else
D_PolysetDraw ();
}
}
/*
================
R_AliasPreparePoints
General clipped case
================
*/
static void R_AliasPreparePoints (void)
{
int i;
stvert_t *pstverts;
finalvert_t *fv;
auxvert_t *av;
mtriangle_t *ptri;
finalvert_t *pfv[3];
pstverts = (stvert_t *)((byte *)paliashdr + paliashdr->stverts);
r_anumverts = pmdl->numverts;
fv = pfinalverts;
av = pauxverts;
for (i = 0 ; i < r_anumverts ; i++, fv++, av++, r_apverts++)
{
fv->flags = 0;
R_AliasTransformFinalVert (fv, av, r_apverts);
if (av->fv[2] < ALIAS_Z_CLIP_PLANE)
fv->flags |= ALIAS_Z_CLIP;
else
{
R_AliasProjectFinalVert (fv, av);
if (fv->v[0] < r_refdef.aliasvrect.x)
fv->flags |= ALIAS_LEFT_CLIP;
if (fv->v[1] < r_refdef.aliasvrect.y)
fv->flags |= ALIAS_TOP_CLIP;
if (fv->v[0] > r_refdef.aliasvrectright)
fv->flags |= ALIAS_RIGHT_CLIP;
if (fv->v[1] > r_refdef.aliasvrectbottom)
fv->flags |= ALIAS_BOTTOM_CLIP;
}
}
//
// clip and draw all triangles
//
r_affinetridesc.numtriangles = 1;
ptri = (mtriangle_t *)((byte *)paliashdr + paliashdr->triangles);
for (i = 0 ; i < pmdl->numtris ; i++, ptri++)
{
pfv[0] = &pfinalverts[ptri->vertindex[0]];
pfv[1] = &pfinalverts[ptri->vertindex[1]];
pfv[2] = &pfinalverts[ptri->vertindex[2]];
if ( pfv[0]->flags & pfv[1]->flags & pfv[2]->flags & (ALIAS_XY_CLIP_MASK | ALIAS_Z_CLIP) )
continue; // completely clipped
//jfm: fill in the triangles s and t into the finalvert
pfv[0]->v[2] = pstverts[ptri->stindex[0]].s;
pfv[0]->v[3] = pstverts[ptri->stindex[0]].t;
pfv[0]->flags |= pstverts[ptri->stindex[0]].onseam;
pfv[1]->v[2] = pstverts[ptri->stindex[1]].s;
pfv[1]->v[3] = pstverts[ptri->stindex[1]].t;
pfv[1]->flags |= pstverts[ptri->stindex[1]].onseam;
pfv[2]->v[2] = pstverts[ptri->stindex[2]].s;
pfv[2]->v[3] = pstverts[ptri->stindex[2]].t;
pfv[2]->flags |= pstverts[ptri->stindex[2]].onseam;
if ( ! ( (pfv[0]->flags | pfv[1]->flags | pfv[2]->flags) & (ALIAS_XY_CLIP_MASK | ALIAS_Z_CLIP) ) )
{ // totally unclipped
r_affinetridesc.pfinalverts = pfinalverts;
r_affinetridesc.ptriangles = ptri;
if ((currententity->model->flags & EF_SPECIAL_TRANS))
D_PolysetDrawT5 ();
else if (currententity->drawflags & DRF_TRANSLUCENT)
D_PolysetDrawT ();
else if ((currententity->model->flags & EF_TRANSPARENT))
D_PolysetDrawT2 ();
else if ((currententity->model->flags & EF_HOLEY))
D_PolysetDrawT3 ();
else
D_PolysetDraw ();
}
else
{ // partially clipped
R_AliasClipTriangle (ptri);
}
}
}