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gl_main.c
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/*
Copyright (C) 1996-1997 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.
*/
// gl_main.c
#include "quakedef.h"
entity_t r_worldentity;
vec3_t modelorg, r_entorigin;
int r_visframecount; // bumped when going to a new PVS
int r_framecount; // used for dlight push checking
mplane_t frustum[4];
int rs_c_brush_polys, rs_c_brush_passes, rs_c_alias_polys, rs_c_alias_passes, rs_c_sky_polys, rs_c_sky_passes;
int rs_c_dynamic_lightmaps, rs_c_particles;
//up to 16 color translated skins
gltexture_t *playertextures[MAX_SCOREBOARD]; // changed to an array of pointers
//
// view origin
//
vec3_t vup;
vec3_t vpn;
vec3_t vright;
vec3_t r_origin;
//
// screen size info
//
refdef_t r_refdef;
mleaf_t *r_viewleaf, *r_oldviewleaf;
int d_lightstyle[256]; // 8.8 fraction of base light value
float r_fovx, r_fovy;
// interpolation
void R_SetupAliasFrame (entity_t *e, aliashdr_t *paliashdr, lerpdata_t *lerpdata);
void R_SetupEntityTransform (entity_t *e, lerpdata_t *lerpdata);
void GL_DrawAliasFrame (aliashdr_t *paliashdr, lerpdata_t lerpdata);
void GL_DrawEntityTransform (lerpdata_t lerpdata);
cvar_t r_norefresh = {"r_norefresh","0", CVAR_NONE};
cvar_t r_drawentities = {"r_drawentities","1", CVAR_NONE};
cvar_t r_drawworld = {"r_drawworld","1", CVAR_NONE};
cvar_t r_drawviewmodel = {"r_drawviewmodel","1", CVAR_NONE};
cvar_t r_speeds = {"r_speeds","0", CVAR_NONE};
cvar_t r_fullbright = {"r_fullbright","0", CVAR_NONE};
cvar_t r_wateralpha = {"r_wateralpha","1", CVAR_ARCHIVE};
cvar_t r_lockalpha = {"r_lockalpha","0", CVAR_ARCHIVE};
cvar_t r_lavafog = {"r_lavafog","0.5", CVAR_ARCHIVE};
cvar_t r_slimefog = {"r_slimefog","0.8", CVAR_ARCHIVE};
cvar_t r_lavaalpha = {"r_lavaalpha","1", CVAR_ARCHIVE};
cvar_t r_slimealpha = {"r_slimealpha","1", CVAR_ARCHIVE};
cvar_t r_teleportalpha = {"r_teleportalpha","1", CVAR_ARCHIVE};
cvar_t r_dynamic = {"r_dynamic","1", CVAR_ARCHIVE};
cvar_t r_dynamicscale = {"r_dynamicscale","1", CVAR_ARCHIVE};
cvar_t r_novis = {"r_novis","0", CVAR_NONE};
cvar_t r_lockfrustum = {"r_lockfrustum","0", CVAR_NONE};
cvar_t r_lockpvs = {"r_lockpvs","0", CVAR_NONE};
cvar_t r_waterwarp = {"r_waterwarp", "1", CVAR_ARCHIVE};
cvar_t r_clearcolor = {"r_clearcolor", "2", CVAR_ARCHIVE}; // Closest to the original
cvar_t gl_finish = {"gl_finish","0", CVAR_NONE};
cvar_t gl_clear = {"gl_clear","0", CVAR_NONE};
cvar_t gl_cull = {"gl_cull","1", CVAR_NONE};
cvar_t gl_farclip = {"gl_farclip","16384", CVAR_ARCHIVE};
cvar_t gl_smoothmodels = {"gl_smoothmodels","1", CVAR_NONE};
cvar_t gl_affinemodels = {"gl_affinemodels","0", CVAR_NONE};
cvar_t gl_polyblend = {"gl_polyblend","1", CVAR_ARCHIVE};
cvar_t gl_flashblend = {"gl_flashblend","1", CVAR_ARCHIVE};
cvar_t gl_flashblendview = {"gl_flashblendview","1", CVAR_ARCHIVE};
cvar_t gl_overbright = {"gl_overbright", "1", CVAR_ARCHIVE};
cvar_t gl_oldspr = {"gl_oldspr", "0", CVAR_NONE}; // Old opaque sprite
cvar_t gl_nocolors = {"gl_nocolors","0", CVAR_NONE};
/*
==================
BoxOnPlaneSide
Returns 1, 2, or 1 + 2
==================
*/
int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, mplane_t *p)
{
float dist1, dist2;
int sides;
// this is done by the BOX_ON_PLANE_SIDE macro before calling this function
/*
// fast axial cases
if (p->type < 3)
{
if (p->dist <= emins[p->type])
return 1;
if (p->dist >= emaxs[p->type])
return 2;
return 3;
}
*/
// general case
switch (p->signbits)
{
case 0:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
break;
case 1:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
break;
case 2:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
break;
case 3:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
break;
case 4:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
break;
case 5:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
break;
case 6:
dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
break;
case 7:
dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
break;
default:
dist1 = dist2 = 0; // make compiler happy
Host_Error ("BoxOnPlaneSide: Bad signbits");
break;
}
sides = 0;
if (dist1 >= p->dist)
sides = 1;
if (dist2 < p->dist)
sides |= 2;
return sides;
}
/*-----------------------------------------------------------------*/
/*
=================
R_CullBox -- johnfitz -- replaced with new function from lordhavoc
Returns true if the box is completely outside the frustum
=================
*/
qboolean R_CullBox (vec3_t emins, vec3_t emaxs)
{
int i;
mplane_t *p;
for (i=0 ; i<4 ; i++)
{
p = frustum + i;
switch(p->signbits)
{
default:
case 0:
if (p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2] < p->dist)
return true;
break;
case 1:
if (p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2] < p->dist)
return true;
break;
case 2:
if (p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2] < p->dist)
return true;
break;
case 3:
if (p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2] < p->dist)
return true;
break;
case 4:
if (p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2] < p->dist)
return true;
break;
case 5:
if (p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2] < p->dist)
return true;
break;
case 6:
if (p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2] < p->dist)
return true;
break;
case 7:
if (p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2] < p->dist)
return true;
break;
}
}
return false;
}
/*
===============
R_CullModelForEntity
uses correct bounds based on rotation
===============
*/
qboolean R_CullModelForEntity (entity_t *e)
{
vec3_t mins, maxs;
if (e->angles[0] || e->angles[2]) // pitch or roll
{
VectorAdd (e->origin, e->model->rmins, mins);
VectorAdd (e->origin, e->model->rmaxs, maxs);
}
else if (e->angles[1]) // yaw
{
VectorAdd (e->origin, e->model->ymins, mins);
VectorAdd (e->origin, e->model->ymaxs, maxs);
}
else // no rotation
{
VectorAdd (e->origin, e->model->mins, mins);
VectorAdd (e->origin, e->model->maxs, maxs);
}
return R_CullBox (mins, maxs);
}
/*
=============================================================
SPRITE MODELS
=============================================================
*/
/*
================
R_GetSpriteFrame
================
*/
mspriteframe_t *R_GetSpriteFrame (entity_t *e)
{
msprite_t *psprite;
mspritegroup_t *pspritegroup;
mspriteframe_t *pspriteframe;
int i, numframes, frame;
float *pintervals, fullinterval, targettime, time;
static float lastmsg = 0;
psprite = e->model->cache.data;
frame = e->frame;
if ((frame >= psprite->numframes) || (frame < 0))
{
if (IsTimeout (&lastmsg, 2))
{
Con_DWarning ("R_GetSpriteFrame: no such frame %d (%d frames) in %s\n", frame, psprite->numframes, e->model->name);
}
frame = 0;
}
if (psprite->frames[frame].type == SPR_SINGLE)
{
pspriteframe = psprite->frames[frame].frameptr;
}
else
{
pspritegroup = (mspritegroup_t *)psprite->frames[frame].frameptr;
pintervals = pspritegroup->intervals;
numframes = pspritegroup->numframes;
fullinterval = pintervals[numframes-1];
time = cl.time + e->syncbase;
// when loading in Mod_LoadSpriteGroup, we guaranteed all interval values
// are positive, so we don't have to worry about division by 0
targettime = time - ((int)(time / fullinterval)) * fullinterval;
for (i=0 ; i<(numframes-1) ; i++)
{
if (pintervals[i] > targettime)
break;
}
pspriteframe = pspritegroup->frames[i];
}
return pspriteframe;
}
/*
=================
R_DrawSpriteModel
now supports all orientations
=================
*/
void R_DrawSpriteModel (entity_t *e)
{
vec3_t point, v_forward, v_right, v_up;
msprite_t *psprite;
mspriteframe_t *frame;
float *s_up, *s_right;
float angle, sr, cr;
// don't even bother culling, because it's just a single
// polygon without a surface cache
//TODO: frustum cull it?
frame = R_GetSpriteFrame (e);
psprite = e->model->cache.data;
switch(psprite->type)
{
case SPR_VP_PARALLEL_UPRIGHT: //faces view plane, up is towards the heavens
v_up[0] = 0;
v_up[1] = 0;
v_up[2] = 1;
s_up = v_up;
s_right = vright;
break;
case SPR_FACING_UPRIGHT: //faces camera origin, up is towards the heavens
VectorSubtract(e->origin, r_origin, v_forward);
v_forward[2] = 0;
VectorNormalizeFast(v_forward);
v_right[0] = v_forward[1];
v_right[1] = -v_forward[0];
v_right[2] = 0;
v_up[0] = 0;
v_up[1] = 0;
v_up[2] = 1;
s_up = v_up;
s_right = v_right;
break;
case SPR_VP_PARALLEL: //faces view plane, up is towards the top of the screen
s_up = vup;
s_right = vright;
break;
case SPR_ORIENTED: //pitch yaw roll are independent of camera (bullet marks on walls)
AngleVectors (e->angles, v_forward, v_right, v_up);
s_up = v_up;
s_right = v_right;
break;
case SPR_VP_PARALLEL_ORIENTED: //faces view plane, but obeys roll value
angle = e->angles[ROLL] * M_PI_DIV_180;
sr = sin(angle);
cr = cos(angle);
v_right[0] = vright[0] * cr + vup[0] * sr;
v_right[1] = vright[1] * cr + vup[1] * sr;
v_right[2] = vright[2] * cr + vup[2] * sr;
v_up[0] = vright[0] * -sr + vup[0] * cr;
v_up[1] = vright[1] * -sr + vup[1] * cr;
v_up[2] = vright[2] * -sr + vup[2] * cr;
s_up = v_up;
s_right = v_right;
break;
default:
return;
}
GL_DisableMultitexture (); // selects TEXTURE0
GL_Bind (frame->gltexture);
// offset decals
if (psprite->type == SPR_ORIENTED)
{
glPolygonOffset (-1, -10000);
glEnable (GL_POLYGON_OFFSET_LINE);
glEnable (GL_POLYGON_OFFSET_FILL);
}
glColor3f (1,1,1);
if (gl_oldspr.value)
glEnable (GL_ALPHA_TEST);
else
{
if (psprite->type == SPR_ORIENTED)
glDepthMask (GL_FALSE); // don't bother writing Z
glEnable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable (GL_ALPHA_TEST);
glAlphaFunc (GL_GEQUAL, 0.5);
}
glBegin (GL_QUADS);
glTexCoord2f (0, 1);
VectorMA (e->origin, frame->down, s_up, point);
VectorMA (point, frame->left, s_right, point);
glVertex3fv (point);
glTexCoord2f (0, 0);
VectorMA (e->origin, frame->up, s_up, point);
VectorMA (point, frame->left, s_right, point);
glVertex3fv (point);
glTexCoord2f (1, 0);
VectorMA (e->origin, frame->up, s_up, point);
VectorMA (point, frame->right, s_right, point);
glVertex3fv (point);
glTexCoord2f (1, 1);
VectorMA (e->origin, frame->down, s_up, point);
VectorMA (point, frame->right, s_right, point);
glVertex3fv (point);
glEnd ();
if (gl_oldspr.value)
glDisable (GL_ALPHA_TEST);
else
{
if (psprite->type == SPR_ORIENTED)
glDepthMask (GL_TRUE); // back to normal Z buffering
glDisable (GL_BLEND);
glDisable (GL_ALPHA_TEST);
glAlphaFunc (GL_GREATER, 0.666);
}
// offset decals
if (psprite->type == SPR_ORIENTED)
{
glPolygonOffset (0, 0);
glDisable (GL_POLYGON_OFFSET_LINE);
glDisable (GL_POLYGON_OFFSET_FILL);
}
}
/*
=============================================================
ALIAS MODELS
=============================================================
*/
#define NUMVERTEXNORMALS 162
float r_avertexnormals[NUMVERTEXNORMALS][3] = {
#include "anorms.h"
};
extern vec3_t lightcolor; // replaces "float shadelight" for lit support
// precalculated dot products for quantized angles
#define SHADEDOT_QUANT 16
float r_avertexnormal_dots[SHADEDOT_QUANT][256] =
#include "anorm_dots.h"
;
float *shadedots = r_avertexnormal_dots[0];
qboolean shading = true; // if false, disable vertex shading for various reasons (fullbright, etc)
float aliasalpha;
/*
=================
R_DrawAliasModel
=================
*/
void R_DrawAliasModel (entity_t *e)
{
int lnum;
vec3_t dist;
float add;
model_t *clmodel;
aliashdr_t *paliashdr;
int anim;
qboolean isclient = false;
int skinnum, client_no;
gltexture_t *tx, *fb;
static float lastmsg = 0;
lerpdata_t lerpdata;
float scale;
qboolean alphatest;
//
// locate the proper data
//
paliashdr = (aliashdr_t *)Mod_Extradata (e->model);
//
// setup pose/lerp data -- do it first so we don't miss updates due to culling
//
R_SetupAliasFrame (e, paliashdr, &lerpdata);
R_SetupEntityTransform (e, &lerpdata);
//
// cull it
//
if (R_CullModelForEntity(e))
return;
VectorCopy (e->origin, r_entorigin);
VectorSubtract (r_origin, r_entorigin, modelorg);
clmodel = e->model;
skinnum = e->skinnum;
client_no = e - cl_entities;
// r_speeds
rs_c_alias_polys += paliashdr->numtris;
// check skin bounds
if (skinnum >= paliashdr->numskins || skinnum < 0)
{
if (IsTimeout (&lastmsg, 2))
{
Con_DWarning ("R_DrawAliasModel: no such skin %d (%d skins) in %s\n", skinnum, paliashdr->numskins, clmodel->name);
}
skinnum = 0;
}
//
// transform it
//
glPushMatrix ();
GL_DrawEntityTransform (lerpdata); // FX
// special handling of view model to keep FOV from altering look.
if (e == &cl.viewent)
scale = 1.0f / tan( DEG2RAD (r_fovx / 2.0f) ) * r_refdef.weaponfov_x / 90.0f; // reverse out fov and do fov we want
else
scale = 1.0f;
glTranslatef (paliashdr->scale_origin[0] * scale, paliashdr->scale_origin[1], paliashdr->scale_origin[2]);
glScalef (paliashdr->scale[0] * scale, paliashdr->scale[1], paliashdr->scale[2]);
//
// model rendering stuff
//
if (gl_smoothmodels.value)
glShadeModel (GL_SMOOTH);
if (gl_affinemodels.value)
glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
shading = true;
//
// set up for alpha blending
//
aliasalpha = ENTALPHA_DECODE(e->alpha);
alphatest = !!(e->model->flags & MF_HOLEY);
if (aliasalpha == 0)
goto cleanup;
if (aliasalpha < 1.0)
{
glDepthMask (GL_FALSE);
glEnable (GL_BLEND);
} else if (alphatest)
glEnable (GL_ALPHA_TEST);
//
// set up lighting
//
R_LightPoint (e->origin, lightcolor);
// add dlights
if (r_dynamic.value) // EER1
{
for (lnum=0 ; lnum<MAX_DLIGHTS ; lnum++)
{
if (cl_dlights[lnum].die >= cl.time)
{
VectorSubtract (e->origin, cl_dlights[lnum].origin, dist);
add = cl_dlights[lnum].radius - VectorLength(dist);
if (add > 0)
VectorMA (lightcolor, add * CLAMP(1.0, r_dynamicscale.value, 32.0), cl_dlights[lnum].color, lightcolor);
}
}
}
// minimum light value on gun (24)
if (e == &cl.viewent)
{
add = 72.0f - (lightcolor[0] + lightcolor[1] + lightcolor[2]);
if (add > 0.0f)
{
lightcolor[0] += add / 3.0f;
lightcolor[1] += add / 3.0f;
lightcolor[2] += add / 3.0f;
}
}
if (client_no >= 1 && client_no <= cl.maxclients)
{
isclient = true;
// minimum light value on players (8)
add = 24.0f - (lightcolor[0] + lightcolor[1] + lightcolor[2]);
if (add > 0.0f)
{
lightcolor[0] += add / 3.0f;
lightcolor[1] += add / 3.0f;
lightcolor[2] += add / 3.0f;
}
}
// clamp lighting so it doesn't overbright as much (96)
add = 288.0f / (lightcolor[0] + lightcolor[1] + lightcolor[2]);
if (add < 1.0f)
VectorScale (lightcolor, add, lightcolor);
shadedots = r_avertexnormal_dots[((int)(e->angles[1] * (SHADEDOT_QUANT / 360.0))) & (SHADEDOT_QUANT - 1)];
VectorScale (lightcolor, 1.0f / 200.0f, lightcolor);
//
// set up textures
//
anim = (int)(cl.time*10) & 3;
tx = paliashdr->gltexture[skinnum][anim];
fb = paliashdr->fullbright[skinnum][anim];
// we can't dynamically colormap textures, so they are cached
// seperately for the players. Heads are just uncolored.
if (e->colormap != vid.colormap && !gl_nocolors.value)
{
if (isclient)
tx = playertextures[client_no - 1];
}
//
// draw it
//
if (gl_mtexable && gl_texture_env_combine && gl_texture_env_add && fb) // case 1: everything in one pass
{
// Binds normal skin to texture env 0
GL_DisableMultitexture (); // selects TEXTURE0
GL_Bind (tx);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
glTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT, GL_MODULATE);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT, GL_TEXTURE);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT, GL_PRIMARY_COLOR_EXT);
glTexEnvf (GL_TEXTURE_ENV, GL_RGB_SCALE_EXT, d_overbrightscale);
// Binds fullbright skin to texture env 1
GL_EnableMultitexture (); // selects TEXTURE1
GL_Bind (fb);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
glEnable (GL_BLEND);
GL_DrawAliasFrame (paliashdr, lerpdata); // FX
glDisable (GL_BLEND);
GL_DisableMultitexture (); // selects TEXTURE0
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
else if (gl_texture_env_combine) // case 2: overbright in one pass, then fullbright pass
{
// first pass
GL_Bind (tx);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
glTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT, GL_MODULATE);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT, GL_TEXTURE);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT, GL_PRIMARY_COLOR_EXT);
glTexEnvf (GL_TEXTURE_ENV, GL_RGB_SCALE_EXT, d_overbrightscale);
GL_DrawAliasFrame (paliashdr, lerpdata); // FX
glTexEnvf (GL_TEXTURE_ENV, GL_RGB_SCALE_EXT, 1.0f);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
// second pass
if (fb)
{
GL_Bind (fb);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glEnable (GL_BLEND);
glBlendFunc (GL_ONE, GL_ONE);
glDepthMask (GL_FALSE);
shading = false;
glColor3f (aliasalpha, aliasalpha, aliasalpha);
R_FogStartAdditive ();
GL_DrawAliasFrame (paliashdr, lerpdata); // FX
R_FogStopAdditive ();
glDepthMask (GL_TRUE);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable (GL_BLEND);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
}
else // case 3: overbright in two passes, then fullbright pass
{
// first pass
GL_Bind (tx);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
GL_DrawAliasFrame (paliashdr, lerpdata); // FX
// second pass -- additive with black fog, to double the object colors but not the fog color
glEnable (GL_BLEND);
glBlendFunc (GL_ONE, GL_ONE);
glDepthMask (GL_FALSE);
R_FogStartAdditive ();
GL_DrawAliasFrame (paliashdr, lerpdata); // FX
R_FogStopAdditive ();
glDepthMask (GL_TRUE);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable (GL_BLEND);
// third pass
if (fb)
{
GL_Bind (fb);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glEnable (GL_BLEND);
glBlendFunc (GL_ONE, GL_ONE);
glDepthMask (GL_FALSE);
shading = false;
glColor3f (aliasalpha, aliasalpha, aliasalpha);
R_FogStartAdditive ();
GL_DrawAliasFrame (paliashdr, lerpdata); // FX
R_FogStopAdditive ();
glDepthMask (GL_TRUE);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable (GL_BLEND);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
}
cleanup:
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // gl_affinemodels
glShadeModel (GL_FLAT); // gl_smoothmodels
glDepthMask (GL_TRUE);
glDisable (GL_BLEND);
if (alphatest)
glDisable (GL_ALPHA_TEST);
glColor3f (1, 1, 1);
glPopMatrix ();
}
//==================================================================================
/*
=============
R_DrawEntities
=============
*/
void R_DrawEntities (void)
{
int i;
entity_t *e;
if (!r_drawentities.value)
return;
// draw standard entities
for (i=0 ; i<cl_numvisedicts ; i++)
{
if ((i + 1) % 100 == 0)
S_ExtraUpdateTime (); // don't let sound get messed up if going slow
e = cl_visedicts[i];
// chase_active
if (e == &cl_entities[cl.viewentity])
e->angles[0] *= 0.3;
switch (e->model->type)
{
case mod_brush:
R_DrawBrushModel (e);
break;
case mod_alias:
if (ENTALPHA_DECODE(e->alpha) < 1)
R_AddToAlpha (ALPHA_ALIAS, R_GetAlphaDist(e->origin), e, NULL, 0);
else
R_DrawAliasModel (e);
break;
case mod_sprite:
R_AddToAlpha (ALPHA_SPRITE, R_GetAlphaDist(e->origin), e, NULL, 0);
break;
default:
break;
}
}
}
//==================================================================================
/*
=============
R_DrawViewModel
=============
*/
void R_DrawViewModel (void)
{
entity_t *e;
if (!r_drawviewmodel.value || chase_active.value)
return;
if (cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0)
return;
e = &cl.viewent;
if (!e->model)
return;
// this fixes a crash
if (e->model->type != mod_alias)
return;
// Prevent weapon model error
if (e->model->name[0] == '*')
{
Con_Warning ("R_DrawViewModel: viewmodel %s invalid\n", e->model->name);
Cvar_Set ("r_drawviewmodel", "0");
return;
}
// hack the depth range to prevent view model from poking into walls
glDepthRange (0, 0.3);
R_DrawAliasModel (e);
glDepthRange (0, 1);
}
/*
============
R_PolyBlend
============
*/
void R_PolyBlend (void)
{
if (!gl_polyblend.value)
return;
if (!v_blend[3])
return;
GL_DisableMultitexture (); // selects TEXTURE0
// glDisable (GL_ALPHA_TEST); //FX don't disable perform alpha test here, because bloom later
glDisable (GL_TEXTURE_2D);
glDisable (GL_DEPTH_TEST);
glEnable (GL_BLEND);
glMatrixMode(GL_PROJECTION);
glLoadIdentity ();
glOrtho (0, 1, 1, 0, -99999, 99999);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity ();
glColor4fv (v_blend);
glBegin (GL_QUADS);
glVertex2f (0, 0);
glVertex2f (1, 0);
glVertex2f (1, 1);
glVertex2f (0, 1);
glEnd ();
glDisable (GL_BLEND);
glEnable (GL_DEPTH_TEST);
glEnable (GL_TEXTURE_2D);
// glEnable (GL_ALPHA_TEST); //FX
}
//==================================================================================
/*
===============
SignbitsForPlane
===============
*/
static inline int SignbitsForPlane (mplane_t *out)
{
int bits, j;
// for fast box on planeside test - identify which corner(s) of the box to text against the plane
bits = 0;
for (j=0 ; j<3 ; j++)
{
if (out->normal[j] < 0)
bits |= 1<<j;
}
return bits;
}
/*
===============
R_SetFrustum
===============
*/
void R_SetFrustum (float fovx, float fovy)
{
int i;
if (r_lockfrustum.value)
return; // Do not update!
TurnVector(frustum[0].normal, vpn, vright, fovx/2 - 90); //left plane
TurnVector(frustum[1].normal, vpn, vright, 90 - fovx/2); //right plane
TurnVector(frustum[2].normal, vpn, vup, 90 - fovy/2); //bottom plane
TurnVector(frustum[3].normal, vpn, vup, fovy/2 - 90); //top plane
for (i=0 ; i<4 ; i++)
{
frustum[i].type = PLANE_ANYZ;
frustum[i].dist = DotProduct (r_origin, frustum[i].normal); //FIXME: shouldn't this always be zero?
frustum[i].signbits = SignbitsForPlane (&frustum[i]);
}
}
/*
=============
R_Clear
johnfitz -- rewritten and gutted
=============
*/
void R_Clear (void)
{
unsigned int clearbits;
clearbits = GL_DEPTH_BUFFER_BIT;
// from mh -- if we get a stencil buffer, we should clear it, even though we don't use it
if (gl_stencilbits)
clearbits |= GL_STENCIL_BUFFER_BIT;
if (gl_clear.value || isIntel) // intel video workaround
clearbits |= GL_COLOR_BUFFER_BIT;
glClear (clearbits);
}
/*
===============
R_SetupFrame
===============
*/
void R_SetupFrame (void)
{
// don't allow cheats in multiplayer
if (cl.maxclients > 1)
{
Cvar_Set ("r_drawentities", "1");
Cvar_Set ("r_drawworld", "1");
Cvar_Set ("r_fullbright", "0");
}
R_PushDlights ();
R_AnimateLight ();
r_framecount++;