/*
================
R_AliasClipTriangle
================
*/
static void R_AliasClipTriangle(model.mtriangle_t ptri)
{
int i, k, pingpong;
model.mtriangle_t mtri = new model.mtriangle_t();
uint clipflags;
// copy vertexes and fix seam texture coordinates
if (ptri.facesfront != 0)
{
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[0]], fva[0][0]);
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[1]], fva[0][1]);
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[2]], fva[0][2]);
}
else
{
for (i=0 ; i<3 ; i++)
{
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[i]], fva[0][i]);
if (ptri.facesfront == 0 && (fva[0][i].flags & ALIAS_ONSEAM) != 0 )
fva[0][i].v[2] += r_affinetridesc.seamfixupX16;
}
}
// clip
clipflags = (uint)(fva[0][0].flags | fva[0][1].flags | fva[0][2].flags);
if ((clipflags & ALIAS_Z_CLIP) != 0)
{
for (i=0 ; i<3 ; i++)
av[i] = pauxverts[ptri.vertindex[i]];
k = R_AliasClip (fva[0], fva[1], ALIAS_Z_CLIP, 3, R_Alias_clip_z);
if (k == 0)
return;
pingpong = 1;
clipflags = (uint)(fva[1][0].flags | fva[1][1].flags | fva[1][2].flags);
}
else
{
pingpong = 0;
k = 3;
}
if ((clipflags & ALIAS_LEFT_CLIP) != 0)
{
k = R_AliasClip (fva[pingpong], fva[pingpong ^ 1],
ALIAS_LEFT_CLIP, k, R_Alias_clip_left);
if (k == 0)
return;
pingpong ^= 1;
}
if ((clipflags & ALIAS_RIGHT_CLIP) != 0)
{
k = R_AliasClip (fva[pingpong], fva[pingpong ^ 1],
ALIAS_RIGHT_CLIP, k, R_Alias_clip_right);
if (k == 0)
return;
pingpong ^= 1;
}
if ((clipflags & ALIAS_BOTTOM_CLIP) != 0)
{
k = R_AliasClip (fva[pingpong], fva[pingpong ^ 1],
ALIAS_BOTTOM_CLIP, k, R_Alias_clip_bottom);
if (k == 0)
return;
pingpong ^= 1;
}
if ((clipflags & ALIAS_TOP_CLIP) != 0)
{
k = R_AliasClip (fva[pingpong], fva[pingpong ^ 1],
ALIAS_TOP_CLIP, k, R_Alias_clip_top);
if (k == 0)
return;
pingpong ^= 1;
}
for (i=0 ; i<k ; i++)
{
if (fva[pingpong][i].v[0] < r_refdef.aliasvrect.x)
fva[pingpong][i].v[0] = r_refdef.aliasvrect.x;
else if (fva[pingpong][i].v[0] > r_refdef.aliasvrectright)
fva[pingpong][i].v[0] = r_refdef.aliasvrectright;
if (fva[pingpong][i].v[1] < r_refdef.aliasvrect.y)
fva[pingpong][i].v[1] = r_refdef.aliasvrect.y;
else if (fva[pingpong][i].v[1] > r_refdef.aliasvrectbottom)
fva[pingpong][i].v[1] = r_refdef.aliasvrectbottom;
fva[pingpong][i].flags = 0;
}
// draw triangles
mtri.facesfront = ptri.facesfront;
r_affinetridesc.ptriangles = new model.mtriangle_t[] { mtri };
r_affinetridesc.pfinalverts = fva[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;
draw.D_PolysetDraw ();
}
}
/*
* ================
* R_AliasClipTriangle
* ================
*/
static void R_AliasClipTriangle(model.mtriangle_t ptri)
{
int i, k, pingpong;
model.mtriangle_t mtri = new model.mtriangle_t();
uint clipflags;
// copy vertexes and fix seam texture coordinates
if (ptri.facesfront != 0)
{
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[0]], fva[0][0]);
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[1]], fva[0][1]);
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[2]], fva[0][2]);
}
else
{
for (i = 0; i < 3; i++)
{
draw.finalvert_t.Copy(pfinalverts[ptri.vertindex[i]], fva[0][i]);
if (ptri.facesfront == 0 && (fva[0][i].flags & ALIAS_ONSEAM) != 0)
{
fva[0][i].v[2] += r_affinetridesc.seamfixupX16;
}
}
}
// clip
clipflags = (uint)(fva[0][0].flags | fva[0][1].flags | fva[0][2].flags);
if ((clipflags & ALIAS_Z_CLIP) != 0)
{
for (i = 0; i < 3; i++)
{
av[i] = pauxverts[ptri.vertindex[i]];
}
k = R_AliasClip(fva[0], fva[1], ALIAS_Z_CLIP, 3, R_Alias_clip_z);
if (k == 0)
{
return;
}
pingpong = 1;
clipflags = (uint)(fva[1][0].flags | fva[1][1].flags | fva[1][2].flags);
}
else
{
pingpong = 0;
k = 3;
}
if ((clipflags & ALIAS_LEFT_CLIP) != 0)
{
k = R_AliasClip(fva[pingpong], fva[pingpong ^ 1],
ALIAS_LEFT_CLIP, k, R_Alias_clip_left);
if (k == 0)
{
return;
}
pingpong ^= 1;
}
if ((clipflags & ALIAS_RIGHT_CLIP) != 0)
{
k = R_AliasClip(fva[pingpong], fva[pingpong ^ 1],
ALIAS_RIGHT_CLIP, k, R_Alias_clip_right);
if (k == 0)
{
return;
}
pingpong ^= 1;
}
if ((clipflags & ALIAS_BOTTOM_CLIP) != 0)
{
k = R_AliasClip(fva[pingpong], fva[pingpong ^ 1],
ALIAS_BOTTOM_CLIP, k, R_Alias_clip_bottom);
if (k == 0)
{
return;
}
pingpong ^= 1;
}
if ((clipflags & ALIAS_TOP_CLIP) != 0)
{
k = R_AliasClip(fva[pingpong], fva[pingpong ^ 1],
ALIAS_TOP_CLIP, k, R_Alias_clip_top);
if (k == 0)
{
return;
}
pingpong ^= 1;
}
for (i = 0; i < k; i++)
{
if (fva[pingpong][i].v[0] < r_refdef.aliasvrect.x)
{
fva[pingpong][i].v[0] = r_refdef.aliasvrect.x;
}
else if (fva[pingpong][i].v[0] > r_refdef.aliasvrectright)
{
fva[pingpong][i].v[0] = r_refdef.aliasvrectright;
}
if (fva[pingpong][i].v[1] < r_refdef.aliasvrect.y)
{
fva[pingpong][i].v[1] = r_refdef.aliasvrect.y;
}
else if (fva[pingpong][i].v[1] > r_refdef.aliasvrectbottom)
{
fva[pingpong][i].v[1] = r_refdef.aliasvrectbottom;
}
fva[pingpong][i].flags = 0;
}
// draw triangles
mtri.facesfront = ptri.facesfront;
r_affinetridesc.ptriangles = new model.mtriangle_t[] { mtri };
r_affinetridesc.pfinalverts = fva[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;
draw.D_PolysetDraw();
}
}
