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r_misc.c
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r_misc.c
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#include "quakedef.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
}
}
/*
===================
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);
}
}
/*
================
TransformVector
================
*/
void TransformVector (vec3_t in, vec3_t out)
{
out[0] = DotProduct(in,vright);
out[1] = DotProduct(in,vup);
out[2] = DotProduct(in,vpn);
}
/*
===============
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)
{
setcvar ("r_fullbright", "0");
setcvar ("r_ambient", "0");
}
if (r_numsurfs.value)
{
if ((surface_p - surfaces) > r_maxsurfsseen)
r_maxsurfsseen = surface_p - surfaces;
Con_Printf (va("Used %zd of %zd 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;
R_CheckVariables ();
R_AnimateLight ();
r_framecount++;
/* debugging
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;
*/
// 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_SetupFrame ();
}