ref: f88b27b503b2614a2d4f6c58b1b7c35e536bee5b
dir: /ref/r_alias.c/
/*
Copyright (C) 1997-2001 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// r_alias.c: routines for setting up to draw alias models
/*
** use a real variable to control lerping
*/
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "../dat.h"
#include "../fns.h"
#define LIGHT_MIN 5 // lowest light value we'll allow, to avoid the
// need for inner-loop light clamping
//PGM
extern byte iractive;
//PGM
int r_amodels_drawn;
affinetridesc_t r_affinetridesc;
vec3_t r_plightvec;
vec3_t r_lerped[1024];
vec3_t r_lerp_frontv, r_lerp_backv, r_lerp_move;
int r_ambientlight;
int r_aliasblendcolor;
float r_shadelight;
daliasframe_t *r_thisframe, *r_lastframe;
dmdl_t *s_pmdl;
float aliastransform[3][4];
float aliasworldtransform[3][4];
float aliasoldworldtransform[3][4];
static float s_ziscale;
static vec3_t s_alias_forward, s_alias_right, s_alias_up;
float r_avertexnormals[NUMVERTEXNORMALS][3] = {
#include "../anorms.h"
};
void R_AliasSetUpLerpData( dmdl_t *pmdl, float backlerp );
void R_AliasSetUpTransform (void);
void R_AliasTransformVector (vec3_t in, vec3_t out, float m[3][4] );
void R_AliasProjectAndClipTestFinalVert (finalvert_t *fv);
void R_AliasTransformFinalVerts( int numpoints, finalvert_t *fv, dtrivertx_t *oldv, dtrivertx_t *newv );
void R_AliasLerpFrames( dmdl_t *paliashdr, float backlerp );
/*
================
R_AliasCheckBBox
================
*/
typedef struct {
int index0;
int index1;
} aedge_t;
static aedge_t aedges[12] = {
{0, 1}, {1, 2}, {2, 3}, {3, 0},
{4, 5}, {5, 6}, {6, 7}, {7, 4},
{0, 5}, {1, 4}, {2, 7}, {3, 6}
};
#define BBOX_TRIVIAL_ACCEPT 0
#define BBOX_MUST_CLIP_XY 1
#define BBOX_MUST_CLIP_Z 2
#define BBOX_TRIVIAL_REJECT 8
/*
** R_AliasCheckFrameBBox
**
** Checks a specific alias frame bounding box
*/
unsigned long R_AliasCheckFrameBBox( daliasframe_t *frame, float worldxf[3][4] )
{
unsigned long aggregate_and_clipcode = ~0U,
aggregate_or_clipcode = 0;
int i;
vec3_t mins, maxs;
vec3_t transformed_min, transformed_max;
qboolean zclipped = false, zfullyclipped = true;
//float minz = 9999.0F;
/*
** get the exact frame bounding box
*/
for (i=0 ; i<3 ; i++)
{
mins[i] = frame->translate[i];
maxs[i] = mins[i] + frame->scale[i]*255;
}
/*
** transform the min and max values into view space
*/
R_AliasTransformVector( mins, transformed_min, aliastransform );
R_AliasTransformVector( maxs, transformed_max, aliastransform );
if ( transformed_min[2] >= ALIAS_Z_CLIP_PLANE )
zfullyclipped = false;
if ( transformed_max[2] >= ALIAS_Z_CLIP_PLANE )
zfullyclipped = false;
if ( zfullyclipped )
{
return BBOX_TRIVIAL_REJECT;
}
if ( zclipped )
{
return ( BBOX_MUST_CLIP_XY | BBOX_MUST_CLIP_Z );
}
/*
** build a transformed bounding box from the given min and max
*/
for ( i = 0; i < 8; i++ )
{
int j;
vec3_t tmp, transformed;
unsigned long clipcode = 0;
if ( i & 1 )
tmp[0] = mins[0];
else
tmp[0] = maxs[0];
if ( i & 2 )
tmp[1] = mins[1];
else
tmp[1] = maxs[1];
if ( i & 4 )
tmp[2] = mins[2];
else
tmp[2] = maxs[2];
R_AliasTransformVector( tmp, transformed, worldxf );
for ( j = 0; j < 4; j++ )
{
float dp = DotProduct( transformed, view_clipplanes[j].normal );
if ( ( dp - view_clipplanes[j].dist ) < 0.0F )
clipcode |= 1 << j;
}
aggregate_and_clipcode &= clipcode;
aggregate_or_clipcode |= clipcode;
}
if ( aggregate_and_clipcode )
{
return BBOX_TRIVIAL_REJECT;
}
if ( !aggregate_or_clipcode )
{
return BBOX_TRIVIAL_ACCEPT;
}
return BBOX_MUST_CLIP_XY;
}
qboolean R_AliasCheckBBox (void)
{
unsigned long ccodes[2] = { 0, 0 };
ccodes[0] = R_AliasCheckFrameBBox( r_thisframe, aliasworldtransform );
/*
** non-lerping model
*/
if ( currententity->backlerp == 0 )
{
if ( ccodes[0] == BBOX_TRIVIAL_ACCEPT )
return BBOX_TRIVIAL_ACCEPT;
else if ( ccodes[0] & BBOX_TRIVIAL_REJECT )
return BBOX_TRIVIAL_REJECT;
else
return ( ccodes[0] & ~BBOX_TRIVIAL_REJECT );
}
ccodes[1] = R_AliasCheckFrameBBox( r_lastframe, aliasoldworldtransform );
if ( ( ccodes[0] | ccodes[1] ) == BBOX_TRIVIAL_ACCEPT )
return BBOX_TRIVIAL_ACCEPT;
else if ( ( ccodes[0] & ccodes[1] ) & BBOX_TRIVIAL_REJECT )
return BBOX_TRIVIAL_REJECT;
else
return ( ccodes[0] | ccodes[1] ) & ~BBOX_TRIVIAL_REJECT;
}
/*
================
R_AliasTransformVector
================
*/
void R_AliasTransformVector(vec3_t in, vec3_t out, float xf[3][4] )
{
out[0] = DotProduct(in, xf[0]) + xf[0][3];
out[1] = DotProduct(in, xf[1]) + xf[1][3];
out[2] = DotProduct(in, xf[2]) + xf[2][3];
}
/*
================
R_AliasPreparePoints
General clipped case
================
*/
typedef struct
{
int num_points;
dtrivertx_t *last_verts; // verts from the last frame
dtrivertx_t *this_verts; // verts from this frame
finalvert_t *dest_verts; // destination for transformed verts
} aliasbatchedtransformdata_t;
aliasbatchedtransformdata_t aliasbatchedtransformdata;
void R_AliasPreparePoints (void)
{
int i;
dstvert_t *pstverts;
dtriangle_t *ptri;
finalvert_t *pfv[3];
finalvert_t finalverts[MAXALIASVERTS +
((CACHE_SIZE - 1) / sizeof(finalvert_t)) + 3];
finalvert_t *pfinalverts;
//PGM
iractive = (r_newrefdef.rdflags & RDF_IRGOGGLES && currententity->flags & RF_IR_VISIBLE);
// iractive = 0;
// if(r_newrefdef.rdflags & RDF_IRGOGGLES && currententity->flags & RF_IR_VISIBLE)
// iractive = 1;
//PGM
// put work vertexes on stack, cache aligned
pfinalverts = (finalvert_t *)
(((uintptr)&finalverts[0] + CACHE_SIZE - 1) & ~(CACHE_SIZE - 1));
aliasbatchedtransformdata.num_points = s_pmdl->num_xyz;
aliasbatchedtransformdata.last_verts = r_lastframe->verts;
aliasbatchedtransformdata.this_verts = r_thisframe->verts;
aliasbatchedtransformdata.dest_verts = pfinalverts;
R_AliasTransformFinalVerts( aliasbatchedtransformdata.num_points,
aliasbatchedtransformdata.dest_verts,
aliasbatchedtransformdata.last_verts,
aliasbatchedtransformdata.this_verts );
// clip and draw all triangles
//
pstverts = (dstvert_t *)((byte *)s_pmdl + s_pmdl->ofs_st);
ptri = (dtriangle_t *)((byte *)s_pmdl + s_pmdl->ofs_tris);
if ( ( currententity->flags & RF_WEAPONMODEL ) && ( r_lefthand->value == 1.0F ) )
{
for (i=0 ; i<s_pmdl->num_tris ; i++, ptri++)
{
pfv[0] = &pfinalverts[ptri->index_xyz[0]];
pfv[1] = &pfinalverts[ptri->index_xyz[1]];
pfv[2] = &pfinalverts[ptri->index_xyz[2]];
if ( pfv[0]->flags & pfv[1]->flags & pfv[2]->flags )
continue; // completely clipped
// insert s/t coordinates
pfv[0]->s = pstverts[ptri->index_st[0]].s << 16;
pfv[0]->t = pstverts[ptri->index_st[0]].t << 16;
pfv[1]->s = pstverts[ptri->index_st[1]].s << 16;
pfv[1]->t = pstverts[ptri->index_st[1]].t << 16;
pfv[2]->s = pstverts[ptri->index_st[2]].s << 16;
pfv[2]->t = pstverts[ptri->index_st[2]].t << 16;
if ( ! (pfv[0]->flags | pfv[1]->flags | pfv[2]->flags) )
{ // totally unclipped
aliastriangleparms.a = pfv[2];
aliastriangleparms.b = pfv[1];
aliastriangleparms.c = pfv[0];
R_DrawTriangle();
}
else
{
R_AliasClipTriangle (pfv[2], pfv[1], pfv[0]);
}
}
}
else
{
for (i=0 ; i<s_pmdl->num_tris ; i++, ptri++)
{
pfv[0] = &pfinalverts[ptri->index_xyz[0]];
pfv[1] = &pfinalverts[ptri->index_xyz[1]];
pfv[2] = &pfinalverts[ptri->index_xyz[2]];
if ( pfv[0]->flags & pfv[1]->flags & pfv[2]->flags )
continue; // completely clipped
// insert s/t coordinates
pfv[0]->s = pstverts[ptri->index_st[0]].s << 16;
pfv[0]->t = pstverts[ptri->index_st[0]].t << 16;
pfv[1]->s = pstverts[ptri->index_st[1]].s << 16;
pfv[1]->t = pstverts[ptri->index_st[1]].t << 16;
pfv[2]->s = pstverts[ptri->index_st[2]].s << 16;
pfv[2]->t = pstverts[ptri->index_st[2]].t << 16;
if ( ! (pfv[0]->flags | pfv[1]->flags | pfv[2]->flags) )
{ // totally unclipped
aliastriangleparms.a = pfv[0];
aliastriangleparms.b = pfv[1];
aliastriangleparms.c = pfv[2];
R_DrawTriangle();
}
else
{ // partially clipped
R_AliasClipTriangle (pfv[0], pfv[1], pfv[2]);
}
}
}
}
/*
================
R_AliasSetUpTransform
================
*/
void R_AliasSetUpTransform (void)
{
int i;
static float viewmatrix[3][4];
vec3_t angles;
// TODO: should really be stored with the entity instead of being reconstructed
// TODO: should use a look-up table
// TODO: could cache lazily, stored in the entity
//
angles[ROLL] = currententity->angles[ROLL];
angles[PITCH] = currententity->angles[PITCH];
angles[YAW] = currententity->angles[YAW];
AngleVectors( angles, s_alias_forward, s_alias_right, s_alias_up );
// TODO: can do this with simple matrix rearrangement
memset( aliasworldtransform, 0, sizeof( aliasworldtransform ) );
memset( aliasoldworldtransform, 0, sizeof( aliasworldtransform ) );
for (i=0 ; i<3 ; i++)
{
aliasoldworldtransform[i][0] = aliasworldtransform[i][0] = s_alias_forward[i];
aliasoldworldtransform[i][0] = aliasworldtransform[i][1] = -s_alias_right[i];
aliasoldworldtransform[i][0] = aliasworldtransform[i][2] = s_alias_up[i];
}
aliasworldtransform[0][3] = currententity->origin[0]-r_origin[0];
aliasworldtransform[1][3] = currententity->origin[1]-r_origin[1];
aliasworldtransform[2][3] = currententity->origin[2]-r_origin[2];
aliasoldworldtransform[0][3] = currententity->oldorigin[0]-r_origin[0];
aliasoldworldtransform[1][3] = currententity->oldorigin[1]-r_origin[1];
aliasoldworldtransform[2][3] = currententity->oldorigin[2]-r_origin[2];
// FIXME: can do more efficiently than full concatenation
// memcpy( rotationmatrix, t2matrix, sizeof( rotationmatrix ) );
// R_ConcatTransforms (t2matrix, tmatrix, rotationmatrix);
// TODO: should be global, set when vright, etc., set
VectorCopy (vright, viewmatrix[0]);
VectorCopy (vup, viewmatrix[1]);
VectorInverse (viewmatrix[1]);
VectorCopy (vpn, viewmatrix[2]);
viewmatrix[0][3] = 0;
viewmatrix[1][3] = 0;
viewmatrix[2][3] = 0;
// memcpy( aliasworldtransform, rotationmatrix, sizeof( aliastransform ) );
R_ConcatTransforms (viewmatrix, aliasworldtransform, aliastransform);
aliasworldtransform[0][3] = currententity->origin[0];
aliasworldtransform[1][3] = currententity->origin[1];
aliasworldtransform[2][3] = currententity->origin[2];
aliasoldworldtransform[0][3] = currententity->oldorigin[0];
aliasoldworldtransform[1][3] = currententity->oldorigin[1];
aliasoldworldtransform[2][3] = currententity->oldorigin[2];
}
/*
================
R_AliasTransformFinalVerts
================
*/
void R_AliasTransformFinalVerts( int numpoints, finalvert_t *fv, dtrivertx_t *oldv, dtrivertx_t *newv )
{
int i;
for ( i = 0; i < numpoints; i++, fv++, oldv++, newv++ )
{
int temp;
float lightcos, *plightnormal;
vec3_t lerped_vert;
lerped_vert[0] = r_lerp_move[0] + oldv->v[0]*r_lerp_backv[0] + newv->v[0]*r_lerp_frontv[0];
lerped_vert[1] = r_lerp_move[1] + oldv->v[1]*r_lerp_backv[1] + newv->v[1]*r_lerp_frontv[1];
lerped_vert[2] = r_lerp_move[2] + oldv->v[2]*r_lerp_backv[2] + newv->v[2]*r_lerp_frontv[2];
plightnormal = r_avertexnormals[newv->lightnormalindex];
// PMM - added double damage shell
if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM) )
{
lerped_vert[0] += plightnormal[0] * POWERSUIT_SCALE;
lerped_vert[1] += plightnormal[1] * POWERSUIT_SCALE;
lerped_vert[2] += plightnormal[2] * POWERSUIT_SCALE;
}
fv->xyz[0] = DotProduct(lerped_vert, aliastransform[0]) + aliastransform[0][3];
fv->xyz[1] = DotProduct(lerped_vert, aliastransform[1]) + aliastransform[1][3];
fv->xyz[2] = DotProduct(lerped_vert, aliastransform[2]) + aliastransform[2][3];
fv->flags = 0;
// lighting
lightcos = 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->l = temp;
if ( fv->xyz[2] < ALIAS_Z_CLIP_PLANE )
{
fv->flags |= ALIAS_Z_CLIP;
}
else
{
R_AliasProjectAndClipTestFinalVert( fv );
}
}
}
/*
================
R_AliasProjectAndClipTestFinalVert
================
*/
void R_AliasProjectAndClipTestFinalVert( finalvert_t *fv )
{
float zi;
float x, y, z;
// project points
x = fv->xyz[0];
y = fv->xyz[1];
z = fv->xyz[2];
zi = 1.0 / z;
fv->zi = zi * s_ziscale;
fv->u = (x * aliasxscale * zi) + aliasxcenter;
fv->v = (y * aliasyscale * zi) + aliasycenter;
if (fv->u < r_refdef.aliasvrect.x)
fv->flags |= ALIAS_LEFT_CLIP;
if (fv->v < r_refdef.aliasvrect.y)
fv->flags |= ALIAS_TOP_CLIP;
if (fv->u > r_refdef.aliasvrectright)
fv->flags |= ALIAS_RIGHT_CLIP;
if (fv->v > r_refdef.aliasvrectbottom)
fv->flags |= ALIAS_BOTTOM_CLIP;
}
/*
===============
R_AliasSetupSkin
===============
*/
static qboolean R_AliasSetupSkin (void)
{
int skinnum;
image_t *pskindesc;
if (currententity->skin)
pskindesc = currententity->skin;
else
{
skinnum = currententity->skinnum;
if ((skinnum >= s_pmdl->num_skins) || (skinnum < 0))
{
ri.Con_Printf (PRINT_ALL, "R_AliasSetupSkin %s: no such skin # %d\n",
currentmodel->name, skinnum);
skinnum = 0;
}
pskindesc = currentmodel->skins[skinnum];
}
if ( !pskindesc )
return false;
r_affinetridesc.pskin = pskindesc->pixels[0];
r_affinetridesc.skinwidth = pskindesc->width;
r_affinetridesc.skinheight = pskindesc->height;
R_PolysetUpdateTables (); // FIXME: precalc edge lookups
return true;
}
/*
================
R_AliasSetupLighting
FIXME: put lighting into tables
================
*/
void R_AliasSetupLighting (void)
{
alight_t lighting;
float lightvec[3] = {-1, 0, 0};
vec3_t light;
int i, j;
// all components of light should be identical in software
if ( currententity->flags & RF_FULLBRIGHT )
{
for (i=0 ; i<3 ; i++)
light[i] = 1.0;
}
else
{
R_LightPoint (currententity->origin, light);
}
// save off light value for server to look at (BIG HACK!)
if ( currententity->flags & RF_WEAPONMODEL )
r_lightlevel->value = 150.0 * light[0];
if ( currententity->flags & RF_MINLIGHT )
{
for (i=0 ; i<3 ; i++)
if (light[i] < 0.1)
light[i] = 0.1;
}
if ( currententity->flags & RF_GLOW )
{ // bonus items will pulse with time
float scale;
float min;
scale = 0.1 * sin(r_newrefdef.time*7);
for (i=0 ; i<3 ; i++)
{
min = light[i] * 0.8;
light[i] += scale;
if (light[i] < min)
light[i] = min;
}
}
j = (light[0] + light[1] + light[2])*0.3333*255;
lighting.ambientlight = j;
lighting.shadelight = j;
lighting.plightvec = lightvec;
// clamp lighting so it doesn't overbright as much
if (lighting.ambientlight > 128)
lighting.ambientlight = 128;
if (lighting.ambientlight + lighting.shadelight > 192)
lighting.shadelight = 192 - lighting.ambientlight;
// guarantee that no vertex will ever be lit below LIGHT_MIN, so we don't have
// to clamp off the bottom
r_ambientlight = lighting.ambientlight;
if (r_ambientlight < LIGHT_MIN)
r_ambientlight = LIGHT_MIN;
r_ambientlight = (255 - r_ambientlight) << VID_CBITS;
if (r_ambientlight < LIGHT_MIN)
r_ambientlight = LIGHT_MIN;
r_shadelight = lighting.shadelight;
if (r_shadelight < 0)
r_shadelight = 0;
r_shadelight *= VID_GRADES;
// rotate the lighting vector into the model's frame of reference
r_plightvec[0] = DotProduct( lighting.plightvec, s_alias_forward );
r_plightvec[1] = -DotProduct( lighting.plightvec, s_alias_right );
r_plightvec[2] = DotProduct( lighting.plightvec, s_alias_up );
}
/*
=================
R_AliasSetupFrames
=================
*/
void R_AliasSetupFrames( dmdl_t *pmdl )
{
int thisframe = currententity->frame;
int lastframe = currententity->oldframe;
if ( ( thisframe >= pmdl->num_frames ) || ( thisframe < 0 ) )
{
ri.Con_Printf (PRINT_ALL, "R_AliasSetupFrames %s: no such thisframe %d\n",
currentmodel->name, thisframe);
thisframe = 0;
}
if ( ( lastframe >= pmdl->num_frames ) || ( lastframe < 0 ) )
{
ri.Con_Printf (PRINT_ALL, "R_AliasSetupFrames %s: no such lastframe %d\n",
currentmodel->name, lastframe);
lastframe = 0;
}
r_thisframe = (daliasframe_t *)((byte *)pmdl + pmdl->ofs_frames
+ thisframe * pmdl->framesize);
r_lastframe = (daliasframe_t *)((byte *)pmdl + pmdl->ofs_frames
+ lastframe * pmdl->framesize);
}
/*
** R_AliasSetUpLerpData
**
** Precomputes lerp coefficients used for the whole frame.
*/
void R_AliasSetUpLerpData( dmdl_t */*pmdl*/, float backlerp )
{
float frontlerp;
vec3_t translation, vectors[3];
int i;
frontlerp = 1.0F - backlerp;
/*
** convert entity's angles into discrete vectors for R, U, and F
*/
AngleVectors (currententity->angles, vectors[0], vectors[1], vectors[2]);
/*
** translation is the vector from last position to this position
*/
VectorSubtract (currententity->oldorigin, currententity->origin, translation);
/*
** move should be the delta back to the previous frame * backlerp
*/
r_lerp_move[0] = DotProduct(translation, vectors[0]); // forward
r_lerp_move[1] = -DotProduct(translation, vectors[1]); // left
r_lerp_move[2] = DotProduct(translation, vectors[2]); // up
VectorAdd( r_lerp_move, r_lastframe->translate, r_lerp_move );
for (i=0 ; i<3 ; i++)
{
r_lerp_move[i] = backlerp*r_lerp_move[i] + frontlerp * r_thisframe->translate[i];
}
for (i=0 ; i<3 ; i++)
{
r_lerp_frontv[i] = frontlerp * r_thisframe->scale[i];
r_lerp_backv[i] = backlerp * r_lastframe->scale[i];
}
}
/*
================
R_AliasDrawModel
================
*/
void R_AliasDrawModel (void)
{
extern void (*d_pdrawspans)(void *);
extern void R_PolysetDrawSpans8_Opaque( void * );
extern void R_PolysetDrawSpans8_33( void * );
extern void R_PolysetDrawSpans8_66( void * );
extern void R_PolysetDrawSpansConstant8_33( void * );
extern void R_PolysetDrawSpansConstant8_66( void * );
s_pmdl = (dmdl_t *)currentmodel->extradata;
if ( r_lerpmodels->value == 0 )
currententity->backlerp = 0;
if ( currententity->flags & RF_WEAPONMODEL )
{
if ( r_lefthand->value == 1.0F )
aliasxscale = -aliasxscale;
else if ( r_lefthand->value == 2.0F )
return;
}
/*
** we have to set our frame pointers and transformations before
** doing any real work
*/
R_AliasSetupFrames( s_pmdl );
R_AliasSetUpTransform();
// see if the bounding box lets us trivially reject, also sets
// trivial accept status
if ( R_AliasCheckBBox() == BBOX_TRIVIAL_REJECT )
{
if ( ( currententity->flags & RF_WEAPONMODEL ) && ( r_lefthand->value == 1.0F ) )
{
aliasxscale = -aliasxscale;
}
return;
}
// set up the skin and verify it exists
if ( !R_AliasSetupSkin () )
{
ri.Con_Printf( PRINT_ALL, "R_AliasDrawModel %s: NULL skin found\n",
currentmodel->name);
return;
}
r_amodels_drawn++;
R_AliasSetupLighting ();
/*
** select the proper span routine based on translucency
*/
// PMM - added double damage shell
// PMM - reordered to handle blending
if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM) )
{
int color;
// PMM - added double
color = currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM);
// PMM - reordered, old code first
/*
if ( color == RF_SHELL_RED )
r_aliasblendcolor = SHELL_RED_COLOR;
else if ( color == RF_SHELL_GREEN )
r_aliasblendcolor = SHELL_GREEN_COLOR;
else if ( color == RF_SHELL_BLUE )
r_aliasblendcolor = SHELL_BLUE_COLOR;
else if ( color == (RF_SHELL_RED | RF_SHELL_GREEN) )
r_aliasblendcolor = SHELL_RG_COLOR;
else if ( color == (RF_SHELL_RED | RF_SHELL_BLUE) )
r_aliasblendcolor = SHELL_RB_COLOR;
else if ( color == (RF_SHELL_BLUE | RF_SHELL_GREEN) )
r_aliasblendcolor = SHELL_BG_COLOR;
// PMM - added this .. it's yellowish
else if ( color == (RF_SHELL_DOUBLE) )
r_aliasblendcolor = SHELL_DOUBLE_COLOR;
else if ( color == (RF_SHELL_HALF_DAM) )
r_aliasblendcolor = SHELL_HALF_DAM_COLOR;
// pmm
else
r_aliasblendcolor = SHELL_WHITE_COLOR;
*/
if ( color & RF_SHELL_RED )
{
if ( ( color & RF_SHELL_BLUE) && ( color & RF_SHELL_GREEN) )
r_aliasblendcolor = SHELL_WHITE_COLOR;
else if ( color & (RF_SHELL_BLUE | RF_SHELL_DOUBLE))
r_aliasblendcolor = SHELL_RB_COLOR;
else
r_aliasblendcolor = SHELL_RED_COLOR;
}
else if ( color & RF_SHELL_BLUE)
{
if ( color & RF_SHELL_DOUBLE )
r_aliasblendcolor = SHELL_CYAN_COLOR;
else
r_aliasblendcolor = SHELL_BLUE_COLOR;
}
else if ( color & (RF_SHELL_DOUBLE) )
r_aliasblendcolor = SHELL_DOUBLE_COLOR;
else if ( color & (RF_SHELL_HALF_DAM) )
r_aliasblendcolor = SHELL_HALF_DAM_COLOR;
else if ( color & RF_SHELL_GREEN )
r_aliasblendcolor = SHELL_GREEN_COLOR;
else
r_aliasblendcolor = SHELL_WHITE_COLOR;
if ( currententity->alpha > 0.33 )
d_pdrawspans = R_PolysetDrawSpansConstant8_66;
else
d_pdrawspans = R_PolysetDrawSpansConstant8_33;
}
else if ( currententity->flags & RF_TRANSLUCENT )
{
if ( currententity->alpha > 0.66 )
d_pdrawspans = R_PolysetDrawSpans8_Opaque;
else if ( currententity->alpha > 0.33 )
d_pdrawspans = R_PolysetDrawSpans8_66;
else
d_pdrawspans = R_PolysetDrawSpans8_33;
}
else
{
d_pdrawspans = R_PolysetDrawSpans8_Opaque;
}
/*
** compute this_frame and old_frame addresses
*/
R_AliasSetUpLerpData( s_pmdl, currententity->backlerp );
if (currententity->flags & RF_DEPTHHACK)
s_ziscale = (float)0x8000 * (float)0x10000 * 3.0;
else
s_ziscale = (float)0x8000 * (float)0x10000;
R_AliasPreparePoints ();
if ( ( currententity->flags & RF_WEAPONMODEL ) && ( r_lefthand->value == 1.0F ) )
{
aliasxscale = -aliasxscale;
}
}