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merge qw_client/r_misc.c and uquake/r_misc.c int common/r_misc.c

Browse source 
merge qw_client/r_sprite.c and uquake/r_sprite.c int common/r_sprite.c
This commit is contained in:
Bill Currie 2000-02-21 10:28:22 +00:00
parent 981acbc014
commit 0196064c51
4 changed files with 36 additions and 957 deletions
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54
qw_client/r_misc.c → common/r_misc.c
View file

@ -1,4 +1,5 @@
/*
r_misc.c
Copyright (C) 1996-1997 Id Software, Inc.
Portions Copyright (C) 1999,2000 Nelson Rush.
Copyright (C) 1999,2000 contributors of the QuakeForge project
@ -20,16 +21,19 @@ along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// r_misc.c
#include "quakedef.h"
#include "r_local.h"
#include <quakedef.h>
#include <r_local.h>
#include <mathlib.h>
#include <sys.h>
#include <console.h>
#include <cvar.h>
#include <cvars.h>
#include <view.h>
#include <sbar.h>
#include <menu.h>
#include <draw.h>
#include <mathlib.h>
#include <console.h>
#include <server.h>
/*
@ -39,7 +43,7 @@ R_CheckVariables
*/
void R_CheckVariables (void)
{
#if 0
#ifdef UQUAKE
static float oldbright;
if (r_fullbright.value != oldbright)
@ -125,10 +129,10 @@ void R_LineGraph (int x, int y, int h)
int color;
// FIXME: should be disabled on no-buffer adapters, or should be in the driver
// x += r_refdef.vrect.x;
// y += r_refdef.vrect.y;
#ifdef UQUAKE
x += r_refdef.vrect.x;
y += r_refdef.vrect.y;
#endif
dest = vid.buffer + vid.rowbytes*y + x;
s = r_graphheight.value;
@ -144,13 +148,15 @@ void R_LineGraph (int x, int y, int h)
if (h>s)
h = s;
for (i=0 ; i<h ; i++, dest -= vid.rowbytes*2)
{
dest[0] = color;
// *(dest-vid.rowbytes) = 0x30;
#ifdef UQUAKE
*(dest-vid.rowbytes) = 0x30;
#endif
}
#if 0
#ifdef UQUAKE
for ( ; i<s ; i++, dest -= vid.rowbytes*2)
{
dest[0] = 0x30;
@ -455,10 +461,13 @@ void R_SetupFrame (void)
float w, h;
// don't allow cheats in multiplayer
r_draworder.value = 0;
r_fullbright.value = 0;
r_ambient.value = 0;
r_drawflat.value = 0;
if (cl.maxclients > 1)
{
r_draworder.value = 0;
r_fullbright.value = 0;
r_ambient.value = 0;
r_drawflat.value = 0;
}
if (r_numsurfs.value)
{
@ -484,8 +493,9 @@ r_drawflat.value = 0;
if (r_refdef.ambientlight < 0)
r_refdef.ambientlight = 0;
// if (!sv.active)
#ifdef UQUAKE
if (!sv.active)
#endif
r_draworder.value = 0; // don't let cheaters look behind walls
R_CheckVariables ();
@ -519,7 +529,11 @@ r_refdef.viewangles[2]= 0;
r_dowarpold = r_dowarp;
r_dowarp = r_waterwarp.value && (r_viewleaf->contents <= CONTENTS_WATER);
if ((r_dowarp != r_dowarpold) || r_viewchanged)
if ((r_dowarp != r_dowarpold)
#ifdef UQUAKE
|| lcd_x.value
#endif
|| r_viewchanged)
{
if (r_dowarp)
{

2
qw_client/r_sprite.c → common/r_sprite.c
View file

@ -24,7 +24,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "quakedef.h"
#include "r_local.h"
#include <mathlib.h>
#include <lib_replace.h>
#include <console.h>
#include <sys.h>
static int clip_current;
static vec5_t clip_verts[2][MAXWORKINGVERTS];

532
uquake/r_misc.c
View file

@ -1,532 +0,0 @@
/*
r_misc.c
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.
*/
#include <quakedef.h>
#include <r_local.h>
#include <mathlib.h>
#include <sys.h>
#include <console.h>
#include <cvar.h>
#include <cvars.h>
#include <view.h>
#include <sbar.h>
#include <console.h>
#include <server.h>
/*
===============
R_CheckVariables
===============
*/
void R_CheckVariables (void)
{
static float oldbright;
if (r_fullbright.value != oldbright)
{
oldbright = r_fullbright.value;
D_FlushCaches (); // so all lighting changes
}
}
/*
============
Show
Debugging use
============
*/
void Show (void)
{
vrect_t vr;
vr.x = vr.y = 0;
vr.width = vid.width;
vr.height = vid.height;
vr.pnext = NULL;
VID_Update (&vr);
}
/*
====================
R_TimeRefresh_f
For program optimization
====================
*/
void R_TimeRefresh_f (void)
{
int i;
float start, stop, time;
int startangle;
vrect_t vr;
startangle = r_refdef.viewangles[1];
start = Sys_DoubleTime ();
for (i=0 ; i<128 ; i++)
{
r_refdef.viewangles[1] = i/128.0*360.0;
VID_LockBuffer ();
R_RenderView ();
VID_UnlockBuffer ();
vr.x = r_refdef.vrect.x;
vr.y = r_refdef.vrect.y;
vr.width = r_refdef.vrect.width;
vr.height = r_refdef.vrect.height;
vr.pnext = NULL;
VID_Update (&vr);
}
stop = Sys_DoubleTime ();
time = stop-start;
Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
r_refdef.viewangles[1] = startangle;
}
/*
================
R_LineGraph
Only called by R_DisplayTime
================
*/
void R_LineGraph (int x, int y, int h)
{
int i;
byte *dest;
int s;
// FIXME: should be disabled on no-buffer adapters, or should be in the driver
x += r_refdef.vrect.x;
y += r_refdef.vrect.y;
dest = vid.buffer + vid.rowbytes*y + x;
s = r_graphheight.value;
if (h>s)
h = s;
for (i=0 ; i<h ; i++, dest -= vid.rowbytes*2)
{
dest[0] = 0xff;
*(dest-vid.rowbytes) = 0x30;
}
for ( ; i<s ; i++, dest -= vid.rowbytes*2)
{
dest[0] = 0x30;
*(dest-vid.rowbytes) = 0x30;
}
}
/*
==============
R_TimeGraph
Performance monitoring tool
==============
*/
#define MAX_TIMINGS 100
extern float mouse_x, mouse_y;
void R_TimeGraph (void)
{
static int timex;
int a;
float r_time2;
static byte r_timings[MAX_TIMINGS];
int x;
r_time2 = Sys_DoubleTime ();
a = (r_time2-r_time1)/0.01;
//a = fabs(mouse_y * 0.05);
//a = (int)((r_refdef.vieworg[2] + 1024)/1)%(int)r_graphheight.value;
//a = fabs(velocity[0])/20;
//a = ((int)fabs(origin[0])/8)%20;
//a = (cl.idealpitch + 30)/5;
r_timings[timex] = a;
a = timex;
if (r_refdef.vrect.width <= MAX_TIMINGS)
x = r_refdef.vrect.width-1;
else
x = r_refdef.vrect.width -
(r_refdef.vrect.width - MAX_TIMINGS)/2;
do
{
R_LineGraph (x, r_refdef.vrect.height-2, r_timings[a]);
if (x==0)
break; // screen too small to hold entire thing
x--;
a--;
if (a == -1)
a = MAX_TIMINGS-1;
} while (a != timex);
timex = (timex+1)%MAX_TIMINGS;
}
/*
=============
R_PrintTimes
=============
*/
void R_PrintTimes (void)
{
float r_time2;
float ms;
r_time2 = Sys_DoubleTime ();
ms = 1000* (r_time2 - r_time1);
Con_Printf ("%5.1f ms %3i/%3i/%3i poly %3i surf\n",
ms, c_faceclip, r_polycount, r_drawnpolycount, c_surf);
c_surf = 0;
}
/*
=============
R_PrintDSpeeds
=============
*/
void R_PrintDSpeeds (void)
{
float ms, dp_time, r_time2, rw_time, db_time, se_time, de_time, dv_time;
r_time2 = Sys_DoubleTime ();
dp_time = (dp_time2 - dp_time1) * 1000;
rw_time = (rw_time2 - rw_time1) * 1000;
db_time = (db_time2 - db_time1) * 1000;
se_time = (se_time2 - se_time1) * 1000;
de_time = (de_time2 - de_time1) * 1000;
dv_time = (dv_time2 - dv_time1) * 1000;
ms = (r_time2 - r_time1) * 1000;
Con_Printf ("%3i %4.1fp %3iw %4.1fb %3is %4.1fe %4.1fv\n",
(int)ms, dp_time, (int)rw_time, db_time, (int)se_time, de_time,
dv_time);
}
/*
=============
R_PrintAliasStats
=============
*/
void R_PrintAliasStats (void)
{
Con_Printf ("%3i polygon model drawn\n", r_amodels_drawn);
}
void WarpPalette (void)
{
int i,j;
byte newpalette[768];
int basecolor[3];
basecolor[0] = 130;
basecolor[1] = 80;
basecolor[2] = 50;
// pull the colors halfway to bright brown
for (i=0 ; i<256 ; i++)
{
for (j=0 ; j<3 ; j++)
{
newpalette[i*3+j] = (host_basepal[i*3+j] + basecolor[j])/2;
}
}
VID_ShiftPalette (newpalette);
}
/*
===================
R_TransformFrustum
===================
*/
void R_TransformFrustum (void)
{
int i;
vec3_t v, v2;
for (i=0 ; i<4 ; i++)
{
v[0] = screenedge[i].normal[2];
v[1] = -screenedge[i].normal[0];
v[2] = screenedge[i].normal[1];
v2[0] = v[1]*vright[0] + v[2]*vup[0] + v[0]*vpn[0];
v2[1] = v[1]*vright[1] + v[2]*vup[1] + v[0]*vpn[1];
v2[2] = v[1]*vright[2] + v[2]*vup[2] + v[0]*vpn[2];
VectorCopy (v2, view_clipplanes[i].normal);
view_clipplanes[i].dist = DotProduct (modelorg, v2);
}
}
#if !id386
/*
================
TransformVector
================
*/
void TransformVector (vec3_t in, vec3_t out)
{
out[0] = DotProduct(in,vright);
out[1] = DotProduct(in,vup);
out[2] = DotProduct(in,vpn);
}
#endif
/*
================
R_TransformPlane
================
*/
void R_TransformPlane (mplane_t *p, float *normal, float *dist)
{
float d;
d = DotProduct (r_origin, p->normal);
*dist = p->dist - d;
// TODO: when we have rotating entities, this will need to use the view matrix
TransformVector (p->normal, normal);
}
/*
===============
R_SetUpFrustumIndexes
===============
*/
void R_SetUpFrustumIndexes (void)
{
int i, j, *pindex;
pindex = r_frustum_indexes;
for (i=0 ; i<4 ; i++)
{
for (j=0 ; j<3 ; j++)
{
if (view_clipplanes[i].normal[j] < 0)
{
pindex[j] = j;
pindex[j+3] = j+3;
}
else
{
pindex[j] = j+3;
pindex[j+3] = j;
}
}
// FIXME: do just once at start
pfrustum_indexes[i] = pindex;
pindex += 6;
}
}
/*
===============
R_SetupFrame
===============
*/
void R_SetupFrame (void)
{
int edgecount;
vrect_t vrect;
float w, h;
// don't allow cheats in multiplayer
if (cl.maxclients > 1)
{
Cvar_Set ("r_draworder", "0");
Cvar_Set ("r_fullbright", "0");
Cvar_Set ("r_ambient", "0");
Cvar_Set ("r_drawflat", "0");
}
if (r_numsurfs.value)
{
if ((surface_p - surfaces) > r_maxsurfsseen)
r_maxsurfsseen = surface_p - surfaces;
Con_Printf ("Used %d of %d surfs; %d max\n", surface_p - surfaces,
surf_max - surfaces, r_maxsurfsseen);
}
if (r_numedges.value)
{
edgecount = edge_p - r_edges;
if (edgecount > r_maxedgesseen)
r_maxedgesseen = edgecount;
Con_Printf ("Used %d of %d edges; %d max\n", edgecount,
r_numallocatededges, r_maxedgesseen);
}
r_refdef.ambientlight = r_ambient.value;
if (r_refdef.ambientlight < 0)
r_refdef.ambientlight = 0;
if (!sv.active)
r_draworder.value = 0; // don't let cheaters look behind walls
R_CheckVariables ();
R_AnimateLight ();
r_framecount++;
numbtofpolys = 0;
// debugging
#if 0
r_refdef.vieworg[0]= 80;
r_refdef.vieworg[1]= 64;
r_refdef.vieworg[2]= 40;
r_refdef.viewangles[0]= 0;
r_refdef.viewangles[1]= 46.763641357;
r_refdef.viewangles[2]= 0;
#endif
// build the transformation matrix for the given view angles
VectorCopy (r_refdef.vieworg, modelorg);
VectorCopy (r_refdef.vieworg, r_origin);
AngleVectors (r_refdef.viewangles, vpn, vright, vup);
// current viewleaf
r_oldviewleaf = r_viewleaf;
r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
r_dowarpold = r_dowarp;
r_dowarp = r_waterwarp.value && (r_viewleaf->contents <= CONTENTS_WATER);
if ((r_dowarp != r_dowarpold) || r_viewchanged || lcd_x.value)
{
if (r_dowarp)
{
if ((vid.width <= vid.maxwarpwidth) &&
(vid.height <= vid.maxwarpheight))
{
vrect.x = 0;
vrect.y = 0;
vrect.width = vid.width;
vrect.height = vid.height;
R_ViewChanged (&vrect, sb_lines, vid.aspect);
}
else
{
w = vid.width;
h = vid.height;
if (w > vid.maxwarpwidth)
{
h *= (float)vid.maxwarpwidth / w;
w = vid.maxwarpwidth;
}
if (h > vid.maxwarpheight)
{
h = vid.maxwarpheight;
w *= (float)vid.maxwarpheight / h;
}
vrect.x = 0;
vrect.y = 0;
vrect.width = (int)w;
vrect.height = (int)h;
R_ViewChanged (&vrect,
(int)((float)sb_lines * (h/(float)vid.height)),
vid.aspect * (h / w) *
((float)vid.width / (float)vid.height));
}
}
else
{
vrect.x = 0;
vrect.y = 0;
vrect.width = vid.width;
vrect.height = vid.height;
R_ViewChanged (&vrect, sb_lines, vid.aspect);
}
r_viewchanged = false;
}
// start off with just the four screen edge clip planes
R_TransformFrustum ();
// save base values
VectorCopy (vpn, base_vpn);
VectorCopy (vright, base_vright);
VectorCopy (vup, base_vup);
VectorCopy (modelorg, base_modelorg);
R_SetSkyFrame ();
R_SetUpFrustumIndexes ();
r_cache_thrash = false;
// clear frame counts
c_faceclip = 0;
d_spanpixcount = 0;
r_polycount = 0;
r_drawnpolycount = 0;
r_wholepolycount = 0;
r_amodels_drawn = 0;
r_outofsurfaces = 0;
r_outofedges = 0;
D_SetupFrame ();
}

405
uquake/r_sprite.c
View file

@ -1,405 +0,0 @@
/*
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.
*/
// r_sprite.c
#include "quakedef.h"
#include "r_local.h"
#include <mathlib.h>
#include <lib_replace.h>
#include <console.h>
#include <sys.h>
static int clip_current;
static vec5_t clip_verts[2][MAXWORKINGVERTS];
static int sprite_width, sprite_height;
spritedesc_t r_spritedesc;
/*
================
R_RotateSprite
================
*/
void R_RotateSprite (float beamlength)
{
vec3_t vec;
if (beamlength == 0.0)
return;
VectorScale (r_spritedesc.vpn, -beamlength, vec);
VectorAdd (r_entorigin, vec, r_entorigin);
VectorSubtract (modelorg, vec, modelorg);
}
/*
=============
R_ClipSpriteFace
Clips the winding at clip_verts[clip_current] and changes clip_current
Throws out the back side
==============
*/
int R_ClipSpriteFace (int nump, clipplane_t *pclipplane)
{
int i, outcount;
float dists[MAXWORKINGVERTS+1];
float frac, clipdist, *pclipnormal;
float *in, *instep, *outstep, *vert2;
clipdist = pclipplane->dist;
pclipnormal = pclipplane->normal;
// calc dists
if (clip_current)
{
in = clip_verts[1][0];
outstep = clip_verts[0][0];
clip_current = 0;
}
else
{
in = clip_verts[0][0];
outstep = clip_verts[1][0];
clip_current = 1;
}
instep = in;
for (i=0 ; i<nump ; i++, instep += sizeof (vec5_t) / sizeof (float))
{
dists[i] = DotProduct (instep, pclipnormal) - clipdist;
}
// handle wraparound case
dists[nump] = dists[0];
Q_memcpy (instep, in, sizeof (vec5_t));
// clip the winding
instep = in;
outcount = 0;
for (i=0 ; i<nump ; i++, instep += sizeof (vec5_t) / sizeof (float))
{
if (dists[i] >= 0)
{
Q_memcpy (outstep, instep, sizeof (vec5_t));
outstep += sizeof (vec5_t) / sizeof (float);
outcount++;
}
if (dists[i] == 0 || dists[i+1] == 0)
continue;
if ( (dists[i] > 0) == (dists[i+1] > 0) )
continue;
// split it into a new vertex
frac = dists[i] / (dists[i] - dists[i+1]);
vert2 = instep + sizeof (vec5_t) / sizeof (float);
outstep[0] = instep[0] + frac*(vert2[0] - instep[0]);
outstep[1] = instep[1] + frac*(vert2[1] - instep[1]);
outstep[2] = instep[2] + frac*(vert2[2] - instep[2]);
outstep[3] = instep[3] + frac*(vert2[3] - instep[3]);
outstep[4] = instep[4] + frac*(vert2[4] - instep[4]);
outstep += sizeof (vec5_t) / sizeof (float);
outcount++;
}
return outcount;
}
/*
================
R_SetupAndDrawSprite
================
*/
void R_SetupAndDrawSprite ()
{
int i, nump;
float dot, scale, *pv;
vec5_t *pverts;
vec3_t left, up, right, down, transformed, local;
emitpoint_t outverts[MAXWORKINGVERTS+1], *pout;
dot = DotProduct (r_spritedesc.vpn, modelorg);
// backface cull
if (dot >= 0)
return;
// build the sprite poster in worldspace
VectorScale (r_spritedesc.vright, r_spritedesc.pspriteframe->right, right);
VectorScale (r_spritedesc.vup, r_spritedesc.pspriteframe->up, up);
VectorScale (r_spritedesc.vright, r_spritedesc.pspriteframe->left, left);
VectorScale (r_spritedesc.vup, r_spritedesc.pspriteframe->down, down);
pverts = clip_verts[0];
pverts[0][0] = r_entorigin[0] + up[0] + left[0];
pverts[0][1] = r_entorigin[1] + up[1] + left[1];
pverts[0][2] = r_entorigin[2] + up[2] + left[2];
pverts[0][3] = 0;
pverts[0][4] = 0;
pverts[1][0] = r_entorigin[0] + up[0] + right[0];
pverts[1][1] = r_entorigin[1] + up[1] + right[1];
pverts[1][2] = r_entorigin[2] + up[2] + right[2];
pverts[1][3] = sprite_width;
pverts[1][4] = 0;
pverts[2][0] = r_entorigin[0] + down[0] + right[0];
pverts[2][1] = r_entorigin[1] + down[1] + right[1];
pverts[2][2] = r_entorigin[2] + down[2] + right[2];
pverts[2][3] = sprite_width;
pverts[2][4] = sprite_height;
pverts[3][0] = r_entorigin[0] + down[0] + left[0];
pverts[3][1] = r_entorigin[1] + down[1] + left[1];
pverts[3][2] = r_entorigin[2] + down[2] + left[2];
pverts[3][3] = 0;
pverts[3][4] = sprite_height;
// clip to the frustum in worldspace
nump = 4;
clip_current = 0;
for (i=0 ; i<4 ; i++)
{
nump = R_ClipSpriteFace (nump, &view_clipplanes[i]);
if (nump < 3)
return;
if (nump >= MAXWORKINGVERTS)
Sys_Error("R_SetupAndDrawSprite: too many points");
}
// transform vertices into viewspace and project
pv = &clip_verts[clip_current][0][0];
r_spritedesc.nearzi = -999999;
for (i=0 ; i<nump ; i++)
{
VectorSubtract (pv, r_origin, local);
TransformVector (local, transformed);
if (transformed[2] < NEAR_CLIP)
transformed[2] = NEAR_CLIP;
pout = &outverts[i];
pout->zi = 1.0 / transformed[2];
if (pout->zi > r_spritedesc.nearzi)
r_spritedesc.nearzi = pout->zi;
pout->s = pv[3];
pout->t = pv[4];
scale = xscale * pout->zi;
pout->u = (xcenter + scale * transformed[0]);
scale = yscale * pout->zi;
pout->v = (ycenter - scale * transformed[1]);
pv += sizeof (vec5_t) / sizeof (*pv);
}
// draw it
r_spritedesc.nump = nump;
r_spritedesc.pverts = outverts;
D_DrawSprite ();
}
/*
================
R_GetSpriteframe
================
*/
mspriteframe_t *R_GetSpriteframe (msprite_t *psprite)
{
mspritegroup_t *pspritegroup;
mspriteframe_t *pspriteframe;
int i, numframes, frame;
float *pintervals, fullinterval, targettime, time;
frame = currententity->frame;
if ((frame >= psprite->numframes) || (frame < 0))
{
Con_Printf ("R_DrawSprite: no such frame %d\n", frame);
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 + currententity->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_DrawSprite
================
*/
void R_DrawSprite (void)
{
int i;
msprite_t *psprite;
vec3_t tvec;
float dot, angle, sr, cr;
psprite = currententity->model->cache.data;
r_spritedesc.pspriteframe = R_GetSpriteframe (psprite);
sprite_width = r_spritedesc.pspriteframe->width;
sprite_height = r_spritedesc.pspriteframe->height;
// TODO: make this caller-selectable
if (psprite->type == SPR_FACING_UPRIGHT)
{
// generate the sprite's axes, with vup straight up in worldspace, and
// r_spritedesc.vright perpendicular to modelorg.
// This will not work if the view direction is very close to straight up or
// down, because the cross product will be between two nearly parallel
// vectors and starts to approach an undefined state, so we don't draw if
// the two vectors are less than 1 degree apart
tvec[0] = -modelorg[0];
tvec[1] = -modelorg[1];
tvec[2] = -modelorg[2];
VectorNormalize (tvec);
dot = tvec[2]; // same as DotProduct (tvec, r_spritedesc.vup) because
// r_spritedesc.vup is 0, 0, 1
if ((dot > 0.999848) || (dot < -0.999848)) // cos(1 degree) = 0.999848
return;
r_spritedesc.vup[0] = 0;
r_spritedesc.vup[1] = 0;
r_spritedesc.vup[2] = 1;
r_spritedesc.vright[0] = tvec[1];
// CrossProduct(r_spritedesc.vup, -modelorg,
r_spritedesc.vright[1] = -tvec[0];
// r_spritedesc.vright)
r_spritedesc.vright[2] = 0;
VectorNormalize (r_spritedesc.vright);
r_spritedesc.vpn[0] = -r_spritedesc.vright[1];
r_spritedesc.vpn[1] = r_spritedesc.vright[0];
r_spritedesc.vpn[2] = 0;
// CrossProduct (r_spritedesc.vright, r_spritedesc.vup,
// r_spritedesc.vpn)
}
else if (psprite->type == SPR_VP_PARALLEL)
{
// generate the sprite's axes, completely parallel to the viewplane. There
// are no problem situations, because the sprite is always in the same
// position relative to the viewer
for (i=0 ; i<3 ; i++)
{
r_spritedesc.vup[i] = vup[i];
r_spritedesc.vright[i] = vright[i];
r_spritedesc.vpn[i] = vpn[i];
}
}
else if (psprite->type == SPR_VP_PARALLEL_UPRIGHT)
{
// generate the sprite's axes, with vup straight up in worldspace, and
// r_spritedesc.vright parallel to the viewplane.
// This will not work if the view direction is very close to straight up or
// down, because the cross product will be between two nearly parallel
// vectors and starts to approach an undefined state, so we don't draw if
// the two vectors are less than 1 degree apart
dot = vpn[2]; // same as DotProduct (vpn, r_spritedesc.vup) because
// r_spritedesc.vup is 0, 0, 1
if ((dot > 0.999848) || (dot < -0.999848)) // cos(1 degree) = 0.999848
return;
r_spritedesc.vup[0] = 0;
r_spritedesc.vup[1] = 0;
r_spritedesc.vup[2] = 1;
r_spritedesc.vright[0] = vpn[1];
// CrossProduct (r_spritedesc.vup, vpn,
r_spritedesc.vright[1] = -vpn[0]; // r_spritedesc.vright)
r_spritedesc.vright[2] = 0;
VectorNormalize (r_spritedesc.vright);
r_spritedesc.vpn[0] = -r_spritedesc.vright[1];
r_spritedesc.vpn[1] = r_spritedesc.vright[0];
r_spritedesc.vpn[2] = 0;
// CrossProduct (r_spritedesc.vright, r_spritedesc.vup,
// r_spritedesc.vpn)
}
else if (psprite->type == SPR_ORIENTED)
{
// generate the sprite's axes, according to the sprite's world orientation
AngleVectors (currententity->angles, r_spritedesc.vpn,
r_spritedesc.vright, r_spritedesc.vup);
}
else if (psprite->type == SPR_VP_PARALLEL_ORIENTED)
{
// generate the sprite's axes, parallel to the viewplane, but rotated in
// that plane around the center according to the sprite entity's roll
// angle. So vpn stays the same, but vright and vup rotate
angle = currententity->angles[ROLL] * (M_PI*2 / 360);
sr = sin(angle);
cr = cos(angle);
for (i=0 ; i<3 ; i++)
{
r_spritedesc.vpn[i] = vpn[i];
r_spritedesc.vright[i] = vright[i] * cr + vup[i] * sr;
r_spritedesc.vup[i] = vright[i] * -sr + vup[i] * cr;
}
}
else
{
Sys_Error ("R_DrawSprite: Bad sprite type %d", psprite->type);
}
R_RotateSprite (psprite->beamlength);
R_SetupAndDrawSprite ();
}