/*
* ================
* R_RenderBmodelFace
* ================
*/
static void R_RenderBmodelFace(bedge_t pedges, model.msurface_t psurf)
{
int i;
uint mask;
model.mplane_t pplane;
double distinv;
double[] p_normal = new double[3];
model.medge_t tedge = new model.medge_t();
clipplane_t pclip;
// skip out if no more surfs
if (surface_p >= surf_max)
{
r_outofsurfaces++;
return;
}
// ditto if not enough edges left, or switch to auxedges if possible
if ((edge_p + psurf.numedges + 4) >= edge_max)
{
r_outofedges += psurf.numedges;
return;
}
c_faceclip++;
// this is a dummy to give the caching mechanism someplace to write to
r_pedge = tedge;
// set up clip planes
pclip = null;
for (i = 3, mask = 0x08; i >= 0; i--, mask >>= 1)
{
if ((r_clipflags & mask) != 0)
{
view_clipplanes[i].next = pclip;
pclip = view_clipplanes[i];
}
}
// push the edges through
r_emitted = 0;
r_nearzi = 0;
r_nearzionly = false;
makeleftedge = makerightedge = false;
// FIXME: keep clipped bmodel edges in clockwise order so last vertex caching
// can be used?
r_lastvertvalid = false;
for ( ; pedges != null; pedges = pedges.pnext)
{
r_leftclipped = r_rightclipped = false;
R_ClipEdge(pedges.v[0], pedges.v[1], pclip);
if (r_leftclipped)
{
makeleftedge = true;
}
if (r_rightclipped)
{
makerightedge = true;
}
}
// if there was a clip off the left edge, add that edge too
// FIXME: faster to do in screen space?
// FIXME: share clipped edges?
if (makeleftedge)
{
r_pedge = tedge;
R_ClipEdge(r_leftexit, r_leftenter, pclip.next);
}
// if there was a clip off the right edge, get the right r_nearzi
if (makerightedge)
{
r_pedge = tedge;
r_nearzionly = true;
R_ClipEdge(r_rightexit, r_rightenter, view_clipplanes[1].next);
}
// if no edges made it out, return without posting the surface
if (r_emitted == 0)
{
return;
}
r_polycount++;
surfaces[surface_p].data = psurf;
surfaces[surface_p].nearzi = r_nearzi;
surfaces[surface_p].flags = psurf.flags;
surfaces[surface_p].insubmodel = true;
surfaces[surface_p].spanstate = 0;
surfaces[surface_p].entity = currententity;
surfaces[surface_p].key = r_currentbkey;
surfaces[surface_p].spans = null;
pplane = psurf.plane;
// FIXME: cache this?
TransformVector(pplane.normal, ref p_normal);
// FIXME: cache this?
distinv = 1.0 / (pplane.dist - mathlib.DotProduct(modelorg, pplane.normal));
surfaces[surface_p].d_zistepu = p_normal[0] * xscaleinv * distinv;
surfaces[surface_p].d_zistepv = -p_normal[1] * yscaleinv * distinv;
surfaces[surface_p].d_ziorigin = p_normal[2] * distinv -
xcenter * surfaces[surface_p].d_zistepu -
ycenter * surfaces[surface_p].d_zistepv;
//JDC VectorCopy (r_worldmodelorg, surface_p.modelorg);
surface_p++;
}
/*
* ================
* R_RenderFace
* ================
*/
static void R_RenderFace(model.msurface_t fa, int clipflags)
{
int i, lindex;
uint mask;
model.mplane_t pplane;
double distinv;
double[] p_normal = new double[3];
model.medge_t[] pedges;
model.medge_t tedge = new model.medge_t();
clipplane_t pclip;
// skip out if no more surfs
if ((surface_p) >= surf_max)
{
r_outofsurfaces++;
return;
}
// ditto if not enough edges left, or switch to auxedges if possible
if ((edge_p + fa.numedges + 4) >= edge_max)
{
r_outofedges += fa.numedges;
return;
}
c_faceclip++;
// set up clip planes
pclip = null;
for (i = 3, mask = 0x08; i >= 0; i--, mask >>= 1)
{
if ((clipflags & mask) != 0)
{
view_clipplanes[i].next = pclip;
pclip = view_clipplanes[i];
}
}
// push the edges through
r_emitted = 0;
r_nearzi = 0;
r_nearzionly = false;
makeleftedge = makerightedge = false;
pedges = currententity.model.edges;
r_lastvertvalid = false;
for (i = 0; i < fa.numedges; i++)
{
lindex = currententity.model.surfedges[fa.firstedge + i];
if (lindex > 0)
{
r_pedge = pedges[lindex];
// if the edge is cached, we can just reuse the edge
if (!insubmodel)
{
if ((r_pedge.cachededgeoffset & FULLY_CLIPPED_CACHED) != 0)
{
if ((r_pedge.cachededgeoffset & FRAMECOUNT_MASK) ==
r_framecount)
{
r_lastvertvalid = false;
continue;
}
}
else
{
if ((edge_p > r_pedge.cachededgeoffset) &&
(r_edges[r_pedge.cachededgeoffset].owner == r_pedge))
{
R_EmitCachedEdge();
r_lastvertvalid = false;
continue;
}
}
}
// assume it's cacheable
cacheoffset = (uint)edge_p;
r_leftclipped = r_rightclipped = false;
R_ClipEdge(r_pcurrentvertbase[r_pedge.v[0]],
r_pcurrentvertbase[r_pedge.v[1]],
pclip);
r_pedge.cachededgeoffset = cacheoffset;
if (r_leftclipped)
{
makeleftedge = true;
}
if (r_rightclipped)
{
makerightedge = true;
}
r_lastvertvalid = true;
}
else
{
lindex = -lindex;
r_pedge = pedges[lindex];
// if the edge is cached, we can just reuse the edge
if (!insubmodel)
{
if ((r_pedge.cachededgeoffset & FULLY_CLIPPED_CACHED) != 0)
{
if ((r_pedge.cachededgeoffset & FRAMECOUNT_MASK) ==
r_framecount)
{
r_lastvertvalid = false;
continue;
}
}
else
{
// it's cached if the cached edge is valid and is owned
// by this medge_t
if ((edge_p > r_pedge.cachededgeoffset) &&
(r_edges[r_pedge.cachededgeoffset].owner == r_pedge))
{
R_EmitCachedEdge();
r_lastvertvalid = false;
continue;
}
}
}
// assume it's cacheable
cacheoffset = (uint)edge_p;
r_leftclipped = r_rightclipped = false;
R_ClipEdge(r_pcurrentvertbase[r_pedge.v[1]],
r_pcurrentvertbase[r_pedge.v[0]],
pclip);
r_pedge.cachededgeoffset = cacheoffset;
if (r_leftclipped)
{
makeleftedge = true;
}
if (r_rightclipped)
{
makerightedge = true;
}
r_lastvertvalid = true;
}
}
// if there was a clip off the left edge, add that edge too
// FIXME: faster to do in screen space?
// FIXME: share clipped edges?
if (makeleftedge)
{
r_pedge = tedge;
r_lastvertvalid = false;
R_ClipEdge(r_leftexit, r_leftenter, pclip.next);
}
// if there was a clip off the right edge, get the right r_nearzi
if (makerightedge)
{
r_pedge = tedge;
r_lastvertvalid = false;
r_nearzionly = true;
R_ClipEdge(r_rightexit, r_rightenter, view_clipplanes[1].next);
}
// if no edges made it out, return without posting the surface
if (r_emitted == 0)
{
return;
}
r_polycount++;
surfaces[surface_p].data = fa;
surfaces[surface_p].nearzi = r_nearzi;
surfaces[surface_p].flags = fa.flags;
surfaces[surface_p].insubmodel = insubmodel;
surfaces[surface_p].spanstate = 0;
surfaces[surface_p].entity = currententity;
surfaces[surface_p].key = r_currentkey++;
surfaces[surface_p].spans = null;
pplane = fa.plane;
// FIXME: cache this?
TransformVector(pplane.normal, ref p_normal);
// FIXME: cache this?
distinv = 1.0 / (pplane.dist - mathlib.DotProduct(modelorg, pplane.normal));
surfaces[surface_p].d_zistepu = p_normal[0] * xscaleinv * distinv;
surfaces[surface_p].d_zistepv = -p_normal[1] * yscaleinv * distinv;
surfaces[surface_p].d_ziorigin = p_normal[2] * distinv -
xcenter * surfaces[surface_p].d_zistepu -
ycenter * surfaces[surface_p].d_zistepv;
//JDC VectorCopy (r_worldmodelorg, surface_p->modelorg);
surface_p++;
}
