/*
================
R_AliasDrawModel
================
*/
static void R_AliasDrawModel(alight_t plighting)
{
r_amodels_drawn++;
// cache align
pfinalverts = (draw.finalvert_t[])finalverts;
pauxverts = auxverts;
paliashdr = (model.aliashdr_t)model.Mod_Extradata (currententity.model);
pmdl = (model.mdl_t)paliashdr.model;
R_AliasSetupSkin ();
R_AliasSetUpTransform (currententity.trivial_accept);
R_AliasSetupLighting (plighting);
R_AliasSetupFrame ();
if (currententity.colormap == null)
sys_linux.Sys_Error ("R_AliasDrawModel: !currententity.colormap");
r_affinetridesc.drawtype = (currententity.trivial_accept == 3) &&
r_recursiveaffinetriangles;
if (r_affinetridesc.drawtype)
{
draw.D_PolysetUpdateTables (); // FIXME: precalc...
}
else
{
}
acolormap = currententity.colormap;
if (currententity != client.cl.viewent)
ziscale = (double)0x8000 * (double)0x10000;
else
ziscale = (double)0x8000 * (double)0x10000 * 3.0;
if (currententity.trivial_accept != 0)
R_AliasPrepareUnclippedPoints ();
else
R_AliasPreparePoints ();
}
/*
================
R_AliasCheckBBox
================
*/
static bool R_AliasCheckBBox()
{
int i, flags, frame, numv;
model.aliashdr_t pahdr;
double zi, v0, v1, frac;
double[][] basepts = new double[8][];
draw.finalvert_t pv0, pv1;
draw.finalvert_t[] viewpts = new draw.finalvert_t[16];
auxvert_t pa0, pa1;
auxvert_t[] viewaux = new auxvert_t[16];
model.maliasframedesc_t pframedesc;
bool zclipped, zfullyclipped;
uint anyclip, allclip;
int minz;
int kk;
for (kk = 0; kk < 16; kk++) viewpts[kk] = new draw.finalvert_t();
for (kk = 0; kk < 16; kk++) viewaux[kk] = new auxvert_t();
for (kk = 0; kk < 8; kk++) basepts[kk] = new double[3] {0, 0, 0};
// expand, rotate, and translate points into worldspace
currententity.trivial_accept = 0;
pmodel = currententity.model;
pahdr = (model.aliashdr_t)model.Mod_Extradata (pmodel);
pmdl = (model.mdl_t)pahdr.model;
R_AliasSetUpTransform (0);
// construct the base bounding box for this frame
frame = currententity.frame;
// TODO: don't repeat this check when drawing?
if ((frame >= pmdl.numframes) || (frame < 0))
{
console.Con_DPrintf ("No such frame " + frame + " " + pmodel.name + "\n");
frame = 0;
}
pframedesc = pahdr.frames[frame];
// x worldspace coordinates
basepts[0][0] = basepts[1][0] = basepts[2][0] = basepts[3][0] =
(double)pframedesc.bboxmin.v[0];
basepts[4][0] = basepts[5][0] = basepts[6][0] = basepts[7][0] =
(double)pframedesc.bboxmax.v[0];
// y worldspace coordinates
basepts[0][1] = basepts[3][1] = basepts[5][1] = basepts[6][1] =
(double)pframedesc.bboxmin.v[1];
basepts[1][1] = basepts[2][1] = basepts[4][1] = basepts[7][1] =
(double)pframedesc.bboxmax.v[1];
// z worldspace coordinates
basepts[0][2] = basepts[1][2] = basepts[4][2] = basepts[5][2] =
(double)pframedesc.bboxmin.v[2];
basepts[2][2] = basepts[3][2] = basepts[6][2] = basepts[7][2] =
(double)pframedesc.bboxmax.v[2];
zclipped = false;
zfullyclipped = true;
minz = 9999;
for (i=0; i<8 ; i++)
{
R_AliasTransformVector (basepts[i], viewaux[i].fv);
if (viewaux[i].fv[2] < ALIAS_Z_CLIP_PLANE)
{
// we must clip points that are closer than the near clip plane
viewpts[i].flags = ALIAS_Z_CLIP;
zclipped = true;
}
else
{
if (viewaux[i].fv[2] < minz)
minz = (int)viewaux[i].fv[2];
viewpts[i].flags = 0;
zfullyclipped = false;
}
}
if (zfullyclipped)
{
return false; // everything was near-z-clipped
}
numv = 8;
if (zclipped)
{
// organize points by edges, use edges to get new points (possible trivial
// reject)
for (i=0 ; i<12 ; i++)
{
// edge endpoints
pv0 = viewpts[aedges[i].index0];
pv1 = viewpts[aedges[i].index1];
pa0 = viewaux[aedges[i].index0];
pa1 = viewaux[aedges[i].index1];
// if one end is clipped and the other isn't, make a new point
if ((pv0.flags ^ pv1.flags) != 0)
{
frac = (ALIAS_Z_CLIP_PLANE - pa0.fv[2]) /
(pa1.fv[2] - pa0.fv[2]);
viewaux[numv].fv[0] = pa0.fv[0] +
(pa1.fv[0] - pa0.fv[0]) * frac;
viewaux[numv].fv[1] = pa0.fv[1] +
(pa1.fv[1] - pa0.fv[1]) * frac;
viewaux[numv].fv[2] = ALIAS_Z_CLIP_PLANE;
viewpts[numv].flags = 0;
numv++;
}
}
}
// project the vertices that remain after clipping
anyclip = 0;
allclip = ALIAS_XY_CLIP_MASK;
// TODO: probably should do this loop in ASM, especially if we use floats
for (i=0 ; i<numv ; i++)
{
// we don't need to bother with vertices that were z-clipped
if ((viewpts[i].flags & ALIAS_Z_CLIP) != 0)
continue;
zi = 1.0 / viewaux[i].fv[2];
// FIXME: do with chop mode in ASM, or convert to float
v0 = (viewaux[i].fv[0] * xscale * zi) + xcenter;
v1 = (viewaux[i].fv[1] * yscale * zi) + ycenter;
flags = 0;
if (v0 < r_refdef.fvrectx)
flags |= ALIAS_LEFT_CLIP;
if (v1 < r_refdef.fvrecty)
flags |= ALIAS_TOP_CLIP;
if (v0 > r_refdef.fvrectright)
flags |= ALIAS_RIGHT_CLIP;
if (v1 > r_refdef.fvrectbottom)
flags |= ALIAS_BOTTOM_CLIP;
anyclip |= (uint)flags;
allclip &= (uint)flags;
}
if (allclip != 0)
return false; // trivial reject off one side
currententity.trivial_accept = ((anyclip == 0) && !zclipped) ? 1 : 0;
if (currententity.trivial_accept != 0)
{
if (minz > (r_aliastransition + (pmdl.size * r_resfudge)))
{
currententity.trivial_accept |= 2;
}
}
return true;
}
