/*
* ================
* R_Alias_clip_z
*
* pfv0 is the unclipped vertex, pfv1 is the z-clipped vertex
* ================
*/
static void R_Alias_clip_z(draw.finalvert_t pfv0, draw.finalvert_t pfv1, ref draw.finalvert_t @out)
{
double scale;
auxvert_t pav0, pav1, avout = new auxvert_t();
pav0 = av[av0];
pav1 = av[av1];
if (pfv0.v[1] >= pfv1.v[1])
{
scale = (ALIAS_Z_CLIP_PLANE - pav0.fv[2]) /
(pav1.fv[2] - pav0.fv[2]);
avout.fv[0] = pav0.fv[0] + (pav1.fv[0] - pav0.fv[0]) * scale;
avout.fv[1] = pav0.fv[1] + (pav1.fv[1] - pav0.fv[1]) * scale;
avout.fv[2] = ALIAS_Z_CLIP_PLANE;
@out.v[2] = (int)(pfv0.v[2] + (pfv1.v[2] - pfv0.v[2]) * scale);
@out.v[3] = (int)(pfv0.v[3] + (pfv1.v[3] - pfv0.v[3]) * scale);
@out.v[4] = (int)(pfv0.v[4] + (pfv1.v[4] - pfv0.v[4]) * scale);
}
else
{
scale = (ALIAS_Z_CLIP_PLANE - pav1.fv[2]) /
(pav0.fv[2] - pav1.fv[2]);
avout.fv[0] = pav1.fv[0] + (pav0.fv[0] - pav1.fv[0]) * scale;
avout.fv[1] = pav1.fv[1] + (pav0.fv[1] - pav1.fv[1]) * scale;
avout.fv[2] = ALIAS_Z_CLIP_PLANE;
@out.v[2] = (int)(pfv1.v[2] + (pfv0.v[2] - pfv1.v[2]) * scale);
@out.v[3] = (int)(pfv1.v[3] + (pfv0.v[3] - pfv1.v[3]) * scale);
@out.v[4] = (int)(pfv1.v[4] + (pfv0.v[4] - pfv1.v[4]) * scale);
}
R_AliasProjectFinalVert(@out, avout);
if (@out.v[0] < r_refdef.aliasvrect.x)
{
@out.flags |= ALIAS_LEFT_CLIP;
}
if (@out.v[1] < r_refdef.aliasvrect.y)
{
@out.flags |= ALIAS_TOP_CLIP;
}
if (@out.v[0] > r_refdef.aliasvrectright)
{
@out.flags |= ALIAS_RIGHT_CLIP;
}
if (@out.v[1] > r_refdef.aliasvrectbottom)
{
@out.flags |= ALIAS_BOTTOM_CLIP;
}
}
static void r_alias_init()
{
finalverts = new draw.finalvert_t[MAXALIASVERTS];
auxverts = new auxvert_t[MAXALIASVERTS];
for (int kk = 0; kk < MAXALIASVERTS; kk++)
{
finalverts[kk] = new draw.finalvert_t();
auxverts[kk] = new auxvert_t();
}
}
/*
* ================
* R_AliasProjectFinalVert
* ================
*/
static void R_AliasProjectFinalVert(draw.finalvert_t fv, auxvert_t av)
{
double zi;
// project points
zi = 1.0 / av.fv[2];
fv.v[5] = (int)(zi * ziscale);
fv.v[0] = (int)((av.fv[0] * aliasxscale * zi) + aliasxcenter);
fv.v[1] = (int)((av.fv[1] * aliasyscale * zi) + aliasycenter);
}
/*
* ================
* R_AliasTransformFinalVert
* ================
*/
static void R_AliasTransformFinalVert(draw.finalvert_t fv, auxvert_t av,
model.trivertx_t pverts, model.stvert_t pstverts)
{
int temp;
double lightcos;
double[] plightnormal;
av.fv[0] = mathlib.DotProduct(pverts.v, aliastransform[0]) +
aliastransform[0][3];
av.fv[1] = mathlib.DotProduct(pverts.v, aliastransform[1]) +
aliastransform[1][3];
av.fv[2] = mathlib.DotProduct(pverts.v, aliastransform[2]) +
aliastransform[2][3];
fv.v[2] = pstverts.s;
fv.v[3] = pstverts.t;
fv.flags = pstverts.onseam;
// lighting
plightnormal = r_avertexnormals[pverts.lightnormalindex];
lightcos = mathlib.DotProduct(plightnormal, r_plightvec);
temp = r_ambientlight;
if (lightcos < 0)
{
temp += (int)(r_shadelight * lightcos);
// clamp; because we limited the minimum ambient and shading light, we
// don't have to clamp low light, just bright
if (temp < 0)
{
temp = 0;
}
}
fv.v[4] = temp;
}
static render()
{
int kk;
int i, j;
for (kk = 0; kk < 4; kk++)
{
screenedge[kk] = new model.mplane_t();
}
for (kk = 0; kk < 4; kk++)
{
view_clipplanes[kk] = new render.clipplane_t();
}
for (kk = 0; kk < 16; kk++)
{
world_clipplanes[kk] = new render.clipplane_t();
}
for (i = 0; i < 2; i++)
{
for (j = 0; j < MAXWORKINGVERTS; j++)
{
clip_verts[i][j] = new double[5];
}
}
for (i = 0; i < 2; i++)
{
for (j = 0; j < 8; j++)
{
fva[i][j] = new draw.finalvert_t();
}
}
for (kk = 0; kk < 8; kk++)
{
av[kk] = new auxvert_t();
}
r_alias_init();
}
/*
================
R_Alias_clip_z
pfv0 is the unclipped vertex, pfv1 is the z-clipped vertex
================
*/
static void R_Alias_clip_z(draw.finalvert_t pfv0, draw.finalvert_t pfv1, ref draw.finalvert_t @out)
{
double scale;
auxvert_t pav0, pav1, avout = new auxvert_t();
pav0 = av[av0];
pav1 = av[av1];
if (pfv0.v[1] >= pfv1.v[1])
{
scale = (ALIAS_Z_CLIP_PLANE - pav0.fv[2]) /
(pav1.fv[2] - pav0.fv[2]);
avout.fv[0] = pav0.fv[0] + (pav1.fv[0] - pav0.fv[0]) * scale;
avout.fv[1] = pav0.fv[1] + (pav1.fv[1] - pav0.fv[1]) * scale;
avout.fv[2] = ALIAS_Z_CLIP_PLANE;
@out.v[2] = (int)(pfv0.v[2] + (pfv1.v[2] - pfv0.v[2]) * scale);
@out.v[3] = (int)(pfv0.v[3] + (pfv1.v[3] - pfv0.v[3]) * scale);
@out.v[4] = (int)(pfv0.v[4] + (pfv1.v[4] - pfv0.v[4]) * scale);
}
else
{
scale = (ALIAS_Z_CLIP_PLANE - pav1.fv[2]) /
(pav0.fv[2] - pav1.fv[2]);
avout.fv[0] = pav1.fv[0] + (pav0.fv[0] - pav1.fv[0]) * scale;
avout.fv[1] = pav1.fv[1] + (pav0.fv[1] - pav1.fv[1]) * scale;
avout.fv[2] = ALIAS_Z_CLIP_PLANE;
@out.v[2] = (int)(pfv1.v[2] + (pfv0.v[2] - pfv1.v[2]) * scale);
@out.v[3] = (int)(pfv1.v[3] + (pfv0.v[3] - pfv1.v[3]) * scale);
@out.v[4] = (int)(pfv1.v[4] + (pfv0.v[4] - pfv1.v[4]) * scale);
}
R_AliasProjectFinalVert (@out, avout);
if (@out.v[0] < r_refdef.aliasvrect.x)
@out.flags |= ALIAS_LEFT_CLIP;
if (@out.v[1] < r_refdef.aliasvrect.y)
@out.flags |= ALIAS_TOP_CLIP;
if (@out.v[0] > r_refdef.aliasvrectright)
@out.flags |= ALIAS_RIGHT_CLIP;
if (@out.v[1] > r_refdef.aliasvrectbottom)
@out.flags |= ALIAS_BOTTOM_CLIP;
}
static render()
{
int kk;
int i,j;
for(kk = 0; kk < 4; kk++) screenedge[kk] = new model.mplane_t();
for(kk = 0; kk < 4; kk++) view_clipplanes[kk] = new render.clipplane_t();
for(kk = 0; kk < 16; kk++) world_clipplanes[kk] = new render.clipplane_t();
for(i = 0; i < 2; i++)
for(j = 0; j < MAXWORKINGVERTS; j++)
clip_verts[i][j] = new double[5];
for(i = 0; i < 2; i++)
for(j = 0; j < 8; j++)
fva[i][j] = new draw.finalvert_t();
for(kk = 0; kk < 8; kk++) av[kk] = new auxvert_t();
r_alias_init();
}
static void r_alias_init()
{
finalverts = new draw.finalvert_t[MAXALIASVERTS];
auxverts = new auxvert_t[MAXALIASVERTS];
for (int kk = 0; kk < MAXALIASVERTS; kk++)
{
finalverts[kk] = new draw.finalvert_t();
auxverts[kk] = new auxvert_t();
}
}
/*
================
R_AliasTransformFinalVert
================
*/
static void R_AliasTransformFinalVert(draw.finalvert_t fv, auxvert_t av,
model.trivertx_t pverts, model.stvert_t pstverts)
{
int temp;
double lightcos;
double[] plightnormal;
av.fv[0] = mathlib.DotProduct(pverts.v, aliastransform[0]) +
aliastransform[0][3];
av.fv[1] = mathlib.DotProduct(pverts.v, aliastransform[1]) +
aliastransform[1][3];
av.fv[2] = mathlib.DotProduct(pverts.v, aliastransform[2]) +
aliastransform[2][3];
fv.v[2] = pstverts.s;
fv.v[3] = pstverts.t;
fv.flags = pstverts.onseam;
// lighting
plightnormal = r_avertexnormals[pverts.lightnormalindex];
lightcos = mathlib.DotProduct(plightnormal, r_plightvec);
temp = r_ambientlight;
if (lightcos < 0)
{
temp += (int)(r_shadelight * lightcos);
// clamp; because we limited the minimum ambient and shading light, we
// don't have to clamp low light, just bright
if (temp < 0)
temp = 0;
}
fv.v[4] = temp;
}
/*
================
R_AliasProjectFinalVert
================
*/
static void R_AliasProjectFinalVert(draw.finalvert_t fv, auxvert_t av)
{
double zi;
// project points
zi = 1.0 / av.fv[2];
fv.v[5] = (int)(zi * ziscale);
fv.v[0] = (int)((av.fv[0] * aliasxscale * zi) + aliasxcenter);
fv.v[1] = (int)((av.fv[1] * aliasyscale * zi) + aliasycenter);
}
/*
================
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;
}
/*
* ================
* 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];
}
// 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], ref 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);
}
