mirror of https://github.com/FWGS/xash3d-fwgs
406 lines
9.3 KiB
C
406 lines
9.3 KiB
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_misc.c
|
|
|
|
#include "r_local.h"
|
|
|
|
#define NUM_MIPS 4
|
|
|
|
cvar_t *sw_mipcap;
|
|
cvar_t *sw_mipscale;
|
|
|
|
surfcache_t *d_initial_rover;
|
|
qboolean d_roverwrapped;
|
|
int d_minmip;
|
|
float d_scalemip[NUM_MIPS-1];
|
|
|
|
static float basemip[NUM_MIPS-1] = {1.0, 0.5*0.8, 0.25*0.8};
|
|
|
|
|
|
//int d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;
|
|
|
|
//int d_pix_min, d_pix_max, d_pix_shift;
|
|
|
|
int d_scantable[MAXHEIGHT];
|
|
short *zspantable[MAXHEIGHT];
|
|
struct qfrustum_s qfrustum;
|
|
/*
|
|
================
|
|
D_Patch
|
|
================
|
|
*/
|
|
void D_Patch (void)
|
|
{
|
|
#if id386
|
|
extern void D_Aff8Patch( void );
|
|
static qboolean protectset8 = false;
|
|
extern void D_PolysetAff8Start( void );
|
|
|
|
if (!protectset8)
|
|
{
|
|
Sys_MakeCodeWriteable ((int)D_PolysetAff8Start,
|
|
(int)D_Aff8Patch - (int)D_PolysetAff8Start);
|
|
Sys_MakeCodeWriteable ((long)R_Surf8Start,
|
|
(long)R_Surf8End - (long)R_Surf8Start);
|
|
protectset8 = true;
|
|
}
|
|
colormap = vid.colormap;
|
|
|
|
R_Surf8Patch ();
|
|
D_Aff8Patch();
|
|
#endif
|
|
}
|
|
/*
|
|
================
|
|
D_ViewChanged
|
|
================
|
|
*/
|
|
|
|
void D_ViewChanged (void)
|
|
{
|
|
int i;
|
|
|
|
scale_for_mip = xscale;
|
|
if (yscale > xscale)
|
|
scale_for_mip = yscale;
|
|
|
|
d_zrowbytes = vid.width * 2;
|
|
d_zwidth = vid.width;
|
|
|
|
/*d_pix_min = gpGlobals->width / 320;
|
|
if (d_pix_min < 1)
|
|
d_pix_min = 1;
|
|
|
|
d_pix_max = (int)((float)gpGlobals->height / (320.0 / 4.0) + 0.5);
|
|
d_pix_shift = 8 - (int)((float)gpGlobals->height / 320.0 + 0.5);
|
|
if (d_pix_max < 1)
|
|
d_pix_max = 1;*/
|
|
|
|
//d_vrectx = RI.vrect.x;
|
|
//d_vrecty = RI.vrect.y;
|
|
//d_vrectright_particle = gpGlobals->width - d_pix_max;
|
|
//d_vrectbottom_particle =
|
|
// gpGlobals->height - d_pix_max;
|
|
|
|
for (i=0 ; i<vid.height; i++)
|
|
{
|
|
d_scantable[i] = i*r_screenwidth;
|
|
zspantable[i] = d_pzbuffer + i*d_zwidth;
|
|
}
|
|
|
|
/*
|
|
** clear Z-buffer and color-buffers if we're doing the gallery
|
|
*/
|
|
if ( !RI.drawWorld )
|
|
{
|
|
memset( d_pzbuffer, 0xff, vid.width * vid.height * sizeof( d_pzbuffer[0] ) );
|
|
}
|
|
|
|
D_Patch ();
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
===================
|
|
R_TransformFrustum
|
|
===================
|
|
*/
|
|
void R_TransformFrustum (void)
|
|
{
|
|
int i;
|
|
vec3_t v, v2;
|
|
|
|
for (i=0 ; i<4 ; i++)
|
|
{
|
|
v[0] = qfrustum.screenedge[i].normal[2];
|
|
v[1] = -qfrustum.screenedge[i].normal[0];
|
|
v[2] = qfrustum.screenedge[i].normal[1];
|
|
|
|
v2[0] = v[1]*RI.vright[0] + v[2]*RI.vup[0] + v[0]*RI.vforward[0];
|
|
v2[1] = v[1]*RI.vright[1] + v[2]*RI.vup[1] + v[0]*RI.vforward[1];
|
|
v2[2] = v[1]*RI.vright[2] + v[2]*RI.vup[2] + v[0]*RI.vforward[2];
|
|
|
|
VectorCopy (v2, qfrustum.view_clipplanes[i].normal);
|
|
|
|
qfrustum.view_clipplanes[i].dist = DotProduct (tr.modelorg, v2);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
TransformVector
|
|
================
|
|
*/
|
|
void TransformVector (vec3_t in, vec3_t out)
|
|
{
|
|
out[0] = DotProduct(in,RI.vright);
|
|
out[1] = DotProduct(in,RI.vup);
|
|
out[2] = DotProduct(in,RI.vforward);
|
|
}
|
|
|
|
/*
|
|
================
|
|
R_TransformPlane
|
|
================
|
|
*/
|
|
void R_TransformPlane (mplane_t *p, float *normal, float *dist)
|
|
{
|
|
float d;
|
|
|
|
d = DotProduct (RI.vieworg, 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 = qfrustum.frustum_indexes;
|
|
|
|
for (i=0 ; i<4 ; i++)
|
|
{
|
|
for (j=0 ; j<3 ; j++)
|
|
{
|
|
if (qfrustum.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
|
|
qfrustum.pfrustum_indexes[i] = pindex;
|
|
pindex += 6;
|
|
}
|
|
}
|
|
|
|
/*
|
|
===============
|
|
R_ViewChanged
|
|
|
|
Called every time the vid structure or r_refdef changes.
|
|
Guaranteed to be called before the first refresh
|
|
===============
|
|
*/
|
|
void R_ViewChanged (vrect_t *vr)
|
|
{
|
|
int i;
|
|
float verticalFieldOfView, horizontalFieldOfView, xOrigin, yOrigin;
|
|
|
|
RI.vrect = *vr;
|
|
|
|
horizontalFieldOfView = 2*tan((float)RI.fov_x/360.0f * M_PI_F);
|
|
verticalFieldOfView = 2*tan((float)RI.fov_y/360.0f * M_PI_F);
|
|
|
|
RI.fvrectx = (float)RI.vrect.x;
|
|
RI.fvrectx_adj = (float)RI.vrect.x - 0.5f;
|
|
RI.vrect_x_adj_shift20 = (RI.vrect.x<<20) + (1<<19) - 1;
|
|
RI.fvrecty = (float)RI.vrect.y;
|
|
RI.fvrecty_adj = (float)RI.vrect.y - 0.5f;
|
|
RI.vrectright = RI.vrect.x + RI.vrect.width;
|
|
RI.vrectright_adj_shift20 = (RI.vrectright<<20) + (1<<19) - 1;
|
|
RI.fvrectright = (float)RI.vrectright;
|
|
RI.fvrectright_adj = (float)RI.vrectright - 0.5f;
|
|
RI.vrectrightedge = (float)RI.vrectright - 0.99f;
|
|
RI.vrectbottom = RI.vrect.y + RI.vrect.height;
|
|
RI.fvrectbottom = (float)RI.vrectbottom;
|
|
RI.fvrectbottom_adj = (float)RI.vrectbottom - 0.5f;
|
|
|
|
RI.aliasvrect.x = (int)(RI.vrect.x * r_aliasuvscale);
|
|
RI.aliasvrect.y = (int)(RI.vrect.y * r_aliasuvscale);
|
|
RI.aliasvrect.width = (int)(RI.vrect.width * r_aliasuvscale);
|
|
RI.aliasvrect.height = (int)(RI.vrect.height * r_aliasuvscale);
|
|
RI.aliasvrectright = RI.aliasvrect.x +
|
|
RI.aliasvrect.width;
|
|
RI.aliasvrectbottom = RI.aliasvrect.y +
|
|
RI.aliasvrect.height;
|
|
|
|
xOrigin = XCENTERING;
|
|
yOrigin = YCENTERING;
|
|
#define PLANE_ANYZ 5
|
|
// values for perspective projection
|
|
// if math were exact, the values would range from 0.5 to to range+0.5
|
|
// hopefully they wll be in the 0.000001 to range+.999999 and truncate
|
|
// the polygon rasterization will never render in the first row or column
|
|
// but will definately render in the [range] row and column, so adjust the
|
|
// buffer origin to get an exact edge to edge fill
|
|
xcenter = ((float)RI.vrect.width * XCENTERING) +
|
|
RI.vrect.x - 0.5f;
|
|
aliasxcenter = xcenter * r_aliasuvscale;
|
|
ycenter = ((float)RI.vrect.height * YCENTERING) +
|
|
RI.vrect.y - 0.5f;
|
|
aliasycenter = ycenter * r_aliasuvscale;
|
|
|
|
xscale = RI.vrect.width / horizontalFieldOfView;
|
|
aliasxscale = xscale * r_aliasuvscale;
|
|
xscaleinv = 1.0f / xscale;
|
|
|
|
yscale = xscale;
|
|
aliasyscale = yscale * r_aliasuvscale;
|
|
yscaleinv = 1.0f / yscale;
|
|
//xscaleshrink = (RI.vrect.width-6)/RI.horizontalFieldOfView;
|
|
//yscaleshrink = xscaleshrink;
|
|
|
|
// left side clip
|
|
qfrustum.screenedge[0].normal[0] = -1.0f / (xOrigin*horizontalFieldOfView);
|
|
qfrustum.screenedge[0].normal[1] = 0;
|
|
qfrustum.screenedge[0].normal[2] = 1;
|
|
qfrustum.screenedge[0].type = PLANE_ANYZ;
|
|
|
|
// right side clip
|
|
qfrustum.screenedge[1].normal[0] =
|
|
1.0f / ((1.0f-xOrigin)*horizontalFieldOfView);
|
|
qfrustum.screenedge[1].normal[1] = 0;
|
|
qfrustum.screenedge[1].normal[2] = 1;
|
|
qfrustum.screenedge[1].type = PLANE_ANYZ;
|
|
|
|
// top side clip
|
|
qfrustum.screenedge[2].normal[0] = 0;
|
|
qfrustum.screenedge[2].normal[1] = -1.0f / (yOrigin*verticalFieldOfView);
|
|
qfrustum.screenedge[2].normal[2] = 1;
|
|
qfrustum.screenedge[2].type = PLANE_ANYZ;
|
|
|
|
// bottom side clip
|
|
qfrustum.screenedge[3].normal[0] = 0;
|
|
qfrustum.screenedge[3].normal[1] = 1.0f / ((1.0f-yOrigin)*verticalFieldOfView);
|
|
qfrustum.screenedge[3].normal[2] = 1;
|
|
qfrustum.screenedge[3].type = PLANE_ANYZ;
|
|
|
|
for (i=0 ; i<4 ; i++)
|
|
VectorNormalize (qfrustum.screenedge[i].normal);
|
|
|
|
D_ViewChanged ();
|
|
}
|
|
|
|
|
|
/*
|
|
===============
|
|
R_SetupFrame
|
|
===============
|
|
*/
|
|
void R_SetupFrameQ (void)
|
|
{
|
|
int i;
|
|
vrect_t vrect;
|
|
|
|
if (r_fullbright->flags & FCVAR_CHANGED)
|
|
{
|
|
r_fullbright->flags &= ~FCVAR_CHANGED;
|
|
D_FlushCaches( ); // so all lighting changes
|
|
}
|
|
|
|
//tr.framecount++;
|
|
|
|
|
|
// build the transformation matrix for the given view angles
|
|
VectorCopy (RI.vieworg, tr.modelorg);
|
|
|
|
//AngleVectors (RI.viewangles, RI.vforward, RI.vright, RI.vup);
|
|
|
|
// current viewleaf
|
|
if ( RI.drawWorld )
|
|
{
|
|
RI.viewleaf = gEngfuncs.Mod_PointInLeaf (RI.vieworg, WORLDMODEL->nodes);
|
|
r_viewcluster = RI.viewleaf->cluster;
|
|
}
|
|
|
|
// if (sw_waterwarp->value && (r_newrefdef.rdflags & RDF_UNDERWATER) )
|
|
// r_dowarp = true;
|
|
// else
|
|
|
|
/*vrect.x = 0;//r_newrefdef.x;
|
|
vrect.y = 0;//r_newrefdef.y;
|
|
vrect.width = gpGlobals->width;
|
|
vrect.height = gpGlobals->height;*/
|
|
vrect.x = RI.viewport[0];
|
|
vrect.y = RI.viewport[1];
|
|
vrect.width = RI.viewport[2];
|
|
vrect.height = RI.viewport[3];
|
|
|
|
d_viewbuffer = (void *)vid.buffer;
|
|
r_screenwidth = vid.rowbytes;
|
|
|
|
R_ViewChanged (&vrect);
|
|
|
|
// start off with just the four screen edge clip planes
|
|
R_TransformFrustum ();
|
|
R_SetUpFrustumIndexes ();
|
|
|
|
// save base values
|
|
VectorCopy (RI.vforward, RI.base_vpn);
|
|
VectorCopy (RI.vright, RI.base_vright);
|
|
VectorCopy (RI.vup, RI.base_vup);
|
|
|
|
// 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_setup
|
|
d_roverwrapped = false;
|
|
d_initial_rover = sc_rover;
|
|
|
|
d_minmip = sw_mipcap->value;
|
|
if (d_minmip > 3)
|
|
d_minmip = 3;
|
|
else if (d_minmip < 0)
|
|
d_minmip = 0;
|
|
|
|
for (i=0 ; i<(NUM_MIPS-1) ; i++)
|
|
d_scalemip[i] = basemip[i] * sw_mipscale->value;
|
|
|
|
//d_aflatcolor = 0;
|
|
}
|
|
|
|
|
|
#if !id386
|
|
|
|
/*
|
|
================
|
|
R_SurfacePatch
|
|
================
|
|
*/
|
|
/*void R_SurfacePatch (void)
|
|
{
|
|
// we only patch code on Intel
|
|
}
|
|
*/
|
|
#endif // !id386
|