mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-06 05:01:26 +00:00
1fce1ea12e
this is I mistakenly did so while making some other changes (which I made sure were NOT in the checkin:)
863 lines
19 KiB
C
863 lines
19 KiB
C
/*
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gl_warp.c
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sky and water polygons
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#include "qtypes.h"
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#include "console.h"
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#include "model.h"
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#include "quakefs.h"
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#include "glquake.h"
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#include "sys.h"
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extern double realtime;
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extern model_t *loadmodel;
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extern int skytexturenum;
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extern qboolean lighthalf;
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int solidskytexture;
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int alphaskytexture;
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float speedscale; // for top sky and bottom sky
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// Set to true if a valid skybox is loaded --KB
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qboolean skyloaded = false;
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msurface_t *warpface;
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extern cvar_t *gl_subdivide_size;
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void
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BoundPoly (int numverts, float *verts, vec3_t mins, vec3_t maxs)
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{
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int i, j;
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float *v;
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mins[0] = mins[1] = mins[2] = 9999;
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maxs[0] = maxs[1] = maxs[2] = -9999;
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v = verts;
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for (i = 0; i < numverts; i++)
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for (j = 0; j < 3; j++, v++) {
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if (*v < mins[j])
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mins[j] = *v;
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if (*v > maxs[j])
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maxs[j] = *v;
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}
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}
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void
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SubdividePolygon (int numverts, float *verts)
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{
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int i, j, k;
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vec3_t mins, maxs;
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float m;
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float *v;
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vec3_t front[64], back[64];
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int f, b;
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float dist[64];
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float frac;
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glpoly_t *poly;
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float s, t;
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if (numverts > 60)
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Sys_Error ("numverts = %i", numverts);
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BoundPoly (numverts, verts, mins, maxs);
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for (i = 0; i < 3; i++) {
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m = (mins[i] + maxs[i]) * 0.5;
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m =
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gl_subdivide_size->value * floor (m / gl_subdivide_size->value +
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0.5);
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if (maxs[i] - m < 8)
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continue;
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if (m - mins[i] < 8)
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continue;
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// cut it
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v = verts + i;
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for (j = 0; j < numverts; j++, v += 3)
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dist[j] = *v - m;
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// wrap cases
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dist[j] = dist[0];
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v -= i;
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VectorCopy (verts, v);
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f = b = 0;
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v = verts;
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for (j = 0; j < numverts; j++, v += 3) {
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if (dist[j] >= 0) {
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VectorCopy (v, front[f]);
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f++;
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}
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if (dist[j] <= 0) {
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VectorCopy (v, back[b]);
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b++;
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}
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if (dist[j] == 0 || dist[j + 1] == 0)
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continue;
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if ((dist[j] > 0) != (dist[j + 1] > 0)) {
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// clip point
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frac = dist[j] / (dist[j] - dist[j + 1]);
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for (k = 0; k < 3; k++)
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front[f][k] = back[b][k] = v[k] + frac * (v[3 + k] - v[k]);
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f++;
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b++;
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}
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}
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SubdividePolygon (f, front[0]);
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SubdividePolygon (b, back[0]);
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return;
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}
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poly =
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Hunk_Alloc (sizeof (glpoly_t) +
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(numverts - 4) * VERTEXSIZE * sizeof (float));
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poly->next = warpface->polys;
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warpface->polys = poly;
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poly->numverts = numverts;
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for (i = 0; i < numverts; i++, verts += 3) {
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VectorCopy (verts, poly->verts[i]);
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s = DotProduct (verts, warpface->texinfo->vecs[0]);
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t = DotProduct (verts, warpface->texinfo->vecs[1]);
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poly->verts[i][3] = s;
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poly->verts[i][4] = t;
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}
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}
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/*
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================
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GL_SubdivideSurface
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Breaks a polygon up along axial 64 unit
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boundaries so that turbulent and sky warps
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can be done reasonably.
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================
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*/
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void
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GL_SubdivideSurface (msurface_t *fa)
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{
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vec3_t verts[64];
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int numverts;
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int i;
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int lindex;
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float *vec;
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warpface = fa;
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//
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// convert edges back to a normal polygon
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//
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numverts = 0;
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for (i = 0; i < fa->numedges; i++) {
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lindex = loadmodel->surfedges[fa->firstedge + i];
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if (lindex > 0)
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vec = loadmodel->vertexes[loadmodel->edges[lindex].v[0]].position;
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else
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vec = loadmodel->vertexes[loadmodel->edges[-lindex].v[1]].position;
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VectorCopy (vec, verts[numverts]);
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numverts++;
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}
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SubdividePolygon (numverts, verts[0]);
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}
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//=========================================================
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// speed up sin calculations - Ed
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float turbsin[] = {
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# include "gl_warp_sin.h"
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};
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#define TURBSCALE (256.0 / (2 * M_PI))
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/*
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=============
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EmitWaterPolys
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Does a water warp on the pre-fragmented glpoly_t chain
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=============
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*/
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void
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EmitWaterPolys (msurface_t *fa)
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{
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glpoly_t *p;
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float *v;
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int i;
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float s, t, os, ot;
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vec3_t nv;
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for (p = fa->polys; p; p = p->next) {
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glBegin (GL_POLYGON);
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for (i = 0, v = p->verts[0]; i < p->numverts; i++, v += VERTEXSIZE) {
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os = v[3];
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ot = v[4];
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s = os + turbsin[(int) ((ot * 0.125 + realtime) * TURBSCALE) & 255];
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s *= (1.0 / 64);
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t = ot + turbsin[(int) ((os * 0.125 + realtime) * TURBSCALE) & 255];
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t *= (1.0 / 64);
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glTexCoord2f (s, t);
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VectorCopy (v, nv);
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nv[2] += r_waterripple->value
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* turbsin[(int) ((v[3] * 0.125 + realtime) * TURBSCALE) & 255]
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* turbsin[(int) ((v[4] * 0.125 + realtime) * TURBSCALE) & 255]
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* (1.0 / 64.0);
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glVertex3fv (nv);
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}
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glEnd ();
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}
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}
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/*
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=================================================================
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Quake 2 environment sky
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=================================================================
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*/
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#define SKY_TEX 2000
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/*
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=========================================================
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TARGA LOADING
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=========================================================
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*/
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typedef struct _TargaHeader {
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unsigned char id_length, colormap_type, image_type;
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unsigned short colormap_index, colormap_length;
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unsigned char colormap_size;
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unsigned short x_origin, y_origin, width, height;
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unsigned char pixel_size, attributes;
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} TargaHeader;
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TargaHeader targa_header;
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byte *targa_rgba;
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int
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fgetLittleShort (QFile *f)
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{
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byte b1, b2;
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b1 = Qgetc (f);
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b2 = Qgetc (f);
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return (short) (b1 + b2 * 256);
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}
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int
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fgetLittleLong (QFile *f)
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{
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byte b1, b2, b3, b4;
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b1 = Qgetc (f);
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b2 = Qgetc (f);
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b3 = Qgetc (f);
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b4 = Qgetc (f);
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return b1 + (b2 << 8) + (b3 << 16) + (b4 << 24);
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}
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/*
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=============
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LoadTGA
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=============
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*/
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void
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LoadTGA (QFile *fin)
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{
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int columns, rows, numPixels;
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byte *pixbuf;
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int row, column;
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unsigned char red = 0, green = 0, blue = 0, alphabyte = 0;
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targa_header.id_length = Qgetc (fin);
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targa_header.colormap_type = Qgetc (fin);
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targa_header.image_type = Qgetc (fin);
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targa_header.colormap_index = fgetLittleShort (fin);
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targa_header.colormap_length = fgetLittleShort (fin);
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targa_header.colormap_size = Qgetc (fin);
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targa_header.x_origin = fgetLittleShort (fin);
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targa_header.y_origin = fgetLittleShort (fin);
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targa_header.width = fgetLittleShort (fin);
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targa_header.height = fgetLittleShort (fin);
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targa_header.pixel_size = Qgetc (fin);
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targa_header.attributes = Qgetc (fin);
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if (targa_header.image_type != 2 && targa_header.image_type != 10)
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Sys_Error ("LoadTGA: Only type 2 and 10 targa RGB images supported\n");
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if (targa_header.colormap_type != 0
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|| (targa_header.pixel_size != 32 && targa_header.pixel_size != 24))
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Sys_Error
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("Texture_LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
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columns = targa_header.width;
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rows = targa_header.height;
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numPixels = columns * rows;
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targa_rgba = malloc (numPixels * 4);
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if (targa_header.id_length != 0)
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Qseek (fin, targa_header.id_length, SEEK_CUR); // skip TARGA image
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// comment
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if (targa_header.image_type == 2) { // Uncompressed, RGB images
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for (row = rows - 1; row >= 0; row--) {
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pixbuf = targa_rgba + row * columns * 4;
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for (column = 0; column < columns; column++) {
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switch (targa_header.pixel_size) {
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case 24:
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blue = Qgetc (fin);
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green = Qgetc (fin);
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red = Qgetc (fin);
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = 255;
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break;
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case 32:
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blue = Qgetc (fin);
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green = Qgetc (fin);
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red = Qgetc (fin);
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alphabyte = Qgetc (fin);
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = alphabyte;
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break;
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}
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}
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}
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} else if (targa_header.image_type == 10) { // Runlength encoded RGB
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// images
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unsigned char packetHeader, packetSize, j;
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for (row = rows - 1; row >= 0; row--) {
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pixbuf = targa_rgba + row * columns * 4;
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for (column = 0; column < columns;) {
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packetHeader = Qgetc (fin);
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packetSize = 1 + (packetHeader & 0x7f);
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if (packetHeader & 0x80) { // run-length packet
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switch (targa_header.pixel_size) {
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case 24:
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blue = Qgetc (fin);
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green = Qgetc (fin);
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red = Qgetc (fin);
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alphabyte = 255;
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break;
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case 32:
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blue = Qgetc (fin);
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green = Qgetc (fin);
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red = Qgetc (fin);
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alphabyte = Qgetc (fin);
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break;
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}
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for (j = 0; j < packetSize; j++) {
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = alphabyte;
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column++;
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if (column == columns) { // run spans across rows
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column = 0;
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if (row > 0)
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row--;
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else
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goto breakOut;
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pixbuf = targa_rgba + row * columns * 4;
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}
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}
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} else { // non run-length packet
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for (j = 0; j < packetSize; j++) {
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switch (targa_header.pixel_size) {
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case 24:
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blue = Qgetc (fin);
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green = Qgetc (fin);
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red = Qgetc (fin);
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = 255;
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break;
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case 32:
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blue = Qgetc (fin);
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green = Qgetc (fin);
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red = Qgetc (fin);
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alphabyte = Qgetc (fin);
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*pixbuf++ = red;
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*pixbuf++ = green;
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*pixbuf++ = blue;
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*pixbuf++ = alphabyte;
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break;
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}
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column++;
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if (column == columns) { // pixel packet run spans
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//
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//
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// across rows
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column = 0;
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if (row > 0)
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row--;
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else
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goto breakOut;
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pixbuf = targa_rgba + row * columns * 4;
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}
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}
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}
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}
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breakOut:;
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}
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}
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Qclose (fin);
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}
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/*
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==================
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R_LoadSkys
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==================
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*/
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char *suf[6] = { "rt", "bk", "lf", "ft", "up", "dn" };
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void
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R_LoadSkys (char *skyname)
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{
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int i;
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QFile *f;
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char name[64];
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if (strcasecmp (skyname, "none") == 0) {
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skyloaded = false;
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return;
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}
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skyloaded = true;
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for (i = 0; i < 6; i++) {
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glBindTexture (GL_TEXTURE_2D, SKY_TEX + i);
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snprintf (name, sizeof (name), "env/%s%s.tga", skyname, suf[i]);
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COM_FOpenFile (name, &f);
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if (!f) {
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Con_DPrintf ("Couldn't load %s\n", name);
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skyloaded = false;
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continue;
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}
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LoadTGA (f);
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glTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, 256, 256, 0, GL_RGBA,
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GL_UNSIGNED_BYTE, targa_rgba);
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free (targa_rgba);
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glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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}
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if (!skyloaded)
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Con_Printf ("Unable to load skybox %s, using normal sky\n", skyname);
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}
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void
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R_SkyBoxPolyVec (vec5_t v)
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{
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// avoid interpolation seams
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// s = s * (254.0/256.0) + (1.0/256.0);
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// t = t * (254.0/256.0) + (1.0/256.0);
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glTexCoord2fv (v);
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glVertex3f (r_refdef.vieworg[0] + v[2],
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r_refdef.vieworg[1] + v[3], r_refdef.vieworg[2] + v[4]);
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}
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#define ftc(x) (x * (254.0/256.0) + (1.0/256.0))
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vec5_t skyvec[6][4] = {
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{
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// right
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{ftc (1), ftc (0), 1024, 1024, 1024},
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{ftc (1), ftc (1), 1024, 1024, -1024},
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{ftc (0), ftc (1), -1024, 1024, -1024},
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{ftc (0), ftc (0), -1024, 1024, 1024}
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},
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{
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// back
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{ftc (1), ftc (0), -1024, 1024, 1024},
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{ftc (1), ftc (1), -1024, 1024, -1024},
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{ftc (0), ftc (1), -1024, -1024, -1024},
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{ftc (0), ftc (0), -1024, -1024, 1024}
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},
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{
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// left
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{ftc (1), ftc (0), -1024, -1024, 1024},
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{ftc (1), ftc (1), -1024, -1024, -1024},
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{ftc (0), ftc (1), 1024, -1024, -1024},
|
|
{ftc (0), ftc (0), 1024, -1024, 1024}
|
|
},
|
|
{
|
|
// front
|
|
{ftc (1), ftc (0), 1024, -1024, 1024},
|
|
{ftc (1), ftc (1), 1024, -1024, -1024},
|
|
{ftc (0), ftc (1), 1024, 1024, -1024},
|
|
{ftc (0), ftc (0), 1024, 1024, 1024}
|
|
},
|
|
{
|
|
// up
|
|
{ftc (1), ftc (0), 1024, -1024, 1024},
|
|
{ftc (1), ftc (1), 1024, 1024, 1024},
|
|
{ftc (0), ftc (1), -1024, 1024, 1024},
|
|
{ftc (0), ftc (0), -1024, -1024, 1024}
|
|
},
|
|
{
|
|
// down
|
|
{ftc (1), ftc (0), 1024, 1024, -1024},
|
|
{ftc (1), ftc (1), 1024, -1024, -1024},
|
|
{ftc (0), ftc (1), -1024, -1024, -1024},
|
|
{ftc (0), ftc (0), -1024, 1024, -1024}
|
|
}
|
|
};
|
|
|
|
#undef ftc
|
|
|
|
void
|
|
R_DrawSkyBox (void)
|
|
{
|
|
int i, j;
|
|
|
|
glEnable (GL_DEPTH_TEST);
|
|
glDepthFunc (GL_ALWAYS);
|
|
// glDisable (GL_BLEND);
|
|
// glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
glDepthRange (gldepthmax, gldepthmax);
|
|
if (lighthalf)
|
|
glColor3f (0.5, 0.5, 0.5);
|
|
else
|
|
glColor3f (1, 1, 1);
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
glBindTexture (GL_TEXTURE_2D, SKY_TEX + i);
|
|
glBegin (GL_QUADS);
|
|
for (j = 0; j < 4; j++)
|
|
R_SkyBoxPolyVec (skyvec[i][j]);
|
|
glEnd ();
|
|
}
|
|
|
|
glColor3f (1, 1, 1);
|
|
glDepthFunc (GL_LEQUAL);
|
|
glEnable (GL_DEPTH_TEST);
|
|
glDepthRange (gldepthmin, gldepthmax);
|
|
}
|
|
|
|
|
|
vec3_t domescale;
|
|
void
|
|
R_DrawSkyLayer (float s)
|
|
{
|
|
int a, b;
|
|
float x, y, a1x, a1y, a2x, a2y;
|
|
vec3_t v;
|
|
|
|
for (a = 0; a < 16; a++) {
|
|
a1x = bubble_costable[a * 2];
|
|
a1y = -bubble_sintable[a * 2];
|
|
a2x = bubble_costable[(a + 1) * 2];
|
|
a2y = -bubble_sintable[(a + 1) * 2];
|
|
|
|
glBegin (GL_TRIANGLE_STRIP);
|
|
glTexCoord2f (0.5 + s * (1.0 / 128.0), 0.5 + s * (1.0 / 128.0));
|
|
glVertex3f (r_refdef.vieworg[0],
|
|
r_refdef.vieworg[1], r_refdef.vieworg[2] + domescale[2]);
|
|
for (b = 1; b < 8; b++) {
|
|
x = bubble_costable[b * 2 + 16];
|
|
y = -bubble_sintable[b * 2 + 16];
|
|
|
|
v[0] = a1x * x * domescale[0];
|
|
v[1] = a1y * x * domescale[1];
|
|
v[2] = y * domescale[2];
|
|
glTexCoord2f ((v[0] + s) * (1.0 / 128.0),
|
|
(v[1] + s) * (1.0 / 128.0));
|
|
glVertex3f (v[0] + r_refdef.vieworg[0],
|
|
v[1] + r_refdef.vieworg[1], v[2] + r_refdef.vieworg[2]);
|
|
|
|
v[0] = a2x * x * domescale[0];
|
|
v[1] = a2y * x * domescale[1];
|
|
v[2] = y * domescale[2];
|
|
glTexCoord2f ((v[0] + s) * (1.0 / 128.0),
|
|
(v[1] + s) * (1.0 / 128.0));
|
|
glVertex3f (v[0] + r_refdef.vieworg[0],
|
|
v[1] + r_refdef.vieworg[1], v[2] + r_refdef.vieworg[2]);
|
|
}
|
|
glTexCoord2f (0.5 + s * (1.0 / 128.0), 0.5 + s * (1.0 / 128.0));
|
|
glVertex3f (r_refdef.vieworg[0],
|
|
r_refdef.vieworg[1], r_refdef.vieworg[2] - domescale[2]);
|
|
glEnd ();
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
R_DrawSkyDome (void)
|
|
{
|
|
glEnable (GL_DEPTH_TEST);
|
|
glDepthFunc (GL_ALWAYS);
|
|
// glDisable (GL_BLEND);
|
|
// glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
glDepthRange (gldepthmax, gldepthmax);
|
|
glDisable (GL_BLEND);
|
|
if (lighthalf)
|
|
glColor3f (0.5, 0.5, 0.5);
|
|
else
|
|
glColor3f (1, 1, 1);
|
|
|
|
// base sky
|
|
glBindTexture (GL_TEXTURE_2D, solidskytexture);
|
|
domescale[0] = 512;
|
|
domescale[1] = 512;
|
|
domescale[2] = 128;
|
|
speedscale = realtime * 8;
|
|
speedscale -= (int) speedscale & ~127;
|
|
R_DrawSkyLayer (speedscale);
|
|
glEnable (GL_BLEND);
|
|
|
|
// clouds
|
|
if (gl_skymultipass->int_val) {
|
|
glBindTexture (GL_TEXTURE_2D, alphaskytexture);
|
|
domescale[0] = 512;
|
|
domescale[1] = 512;
|
|
domescale[2] = 128;
|
|
speedscale = realtime * 16;
|
|
speedscale -= (int) speedscale & ~127;
|
|
R_DrawSkyLayer (speedscale);
|
|
}
|
|
// glDisable (GL_BLEND);
|
|
glColor3f (1, 1, 1);
|
|
glDepthFunc (GL_LEQUAL);
|
|
glEnable (GL_DEPTH_TEST);
|
|
glDepthRange (gldepthmin, gldepthmax);
|
|
}
|
|
|
|
void
|
|
R_DrawSky (void)
|
|
{
|
|
if (skyloaded)
|
|
R_DrawSkyBox ();
|
|
else
|
|
R_DrawSkyDome ();
|
|
}
|
|
|
|
|
|
|
|
//===============================================================
|
|
|
|
/*
|
|
=============
|
|
R_InitSky
|
|
|
|
A sky texture is 256*128, with the right side being a masked overlay
|
|
==============
|
|
*/
|
|
void
|
|
R_InitSky (texture_t *mt)
|
|
{
|
|
int i, j, p;
|
|
byte *src;
|
|
unsigned trans[128 * 128];
|
|
unsigned transpix;
|
|
int r, g, b;
|
|
unsigned *rgba;
|
|
|
|
src = (byte *) mt + mt->offsets[0];
|
|
|
|
// make an average value for the back to avoid
|
|
// a fringe on the top level
|
|
|
|
r = g = b = 0;
|
|
for (i = 0; i < 128; i++)
|
|
for (j = 0; j < 128; j++) {
|
|
p = src[i * 256 + j + 128];
|
|
rgba = &d_8to24table[p];
|
|
trans[(i * 128) + j] = *rgba;
|
|
r += ((byte *) rgba)[0];
|
|
g += ((byte *) rgba)[1];
|
|
b += ((byte *) rgba)[2];
|
|
}
|
|
|
|
((byte *) & transpix)[0] = r / (128 * 128);
|
|
((byte *) & transpix)[1] = g / (128 * 128);
|
|
((byte *) & transpix)[2] = b / (128 * 128);
|
|
((byte *) & transpix)[3] = 0;
|
|
|
|
|
|
if (!solidskytexture)
|
|
solidskytexture = texture_extension_number++;
|
|
glBindTexture (GL_TEXTURE_2D, solidskytexture);
|
|
glTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, 128, 128, 0, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, trans);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
|
|
|
|
for (i = 0; i < 128; i++)
|
|
for (j = 0; j < 128; j++) {
|
|
p = src[i * 256 + j];
|
|
if (p == 0)
|
|
trans[(i * 128) + j] = transpix;
|
|
else
|
|
trans[(i * 128) + j] = d_8to24table[p];
|
|
}
|
|
|
|
if (!alphaskytexture)
|
|
alphaskytexture = texture_extension_number++;
|
|
glBindTexture (GL_TEXTURE_2D, alphaskytexture);
|
|
glTexImage2D (GL_TEXTURE_2D, 0, gl_alpha_format, 128, 128, 0, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, trans);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
}
|
|
|
|
/*
|
|
=============
|
|
EmitSkyPolys
|
|
=============
|
|
*/
|
|
void
|
|
EmitSkyPolys (msurface_t *fa)
|
|
{
|
|
glpoly_t *p;
|
|
float *v;
|
|
int i;
|
|
float s, t;
|
|
vec3_t dir;
|
|
float length;
|
|
|
|
for (p = fa->polys; p; p = p->next) {
|
|
glBegin (GL_POLYGON);
|
|
for (i = 0, v = p->verts[0]; i < p->numverts; i++, v += VERTEXSIZE) {
|
|
VectorSubtract (v, r_origin, dir);
|
|
dir[2] *= 3; // flatten the sphere
|
|
|
|
length = dir[0] * dir[0] + dir[1] * dir[1] + dir[2] * dir[2];
|
|
length = sqrt (length);
|
|
length = 6 * 63 / length;
|
|
|
|
dir[0] *= length;
|
|
dir[1] *= length;
|
|
|
|
s = (speedscale + dir[0]) * (1.0 / 128);
|
|
t = (speedscale + dir[1]) * (1.0 / 128);
|
|
|
|
glTexCoord2f (s, t);
|
|
glVertex3fv (v);
|
|
}
|
|
glEnd ();
|
|
}
|
|
}
|
|
|
|
/*
|
|
=================
|
|
R_DrawSkyChain
|
|
=================
|
|
*/
|
|
void
|
|
R_DrawSkyChain (msurface_t *s)
|
|
{
|
|
msurface_t *fa;
|
|
|
|
// used when gl_texsort is on
|
|
glBindTexture (GL_TEXTURE_2D, solidskytexture);
|
|
speedscale = realtime * 8;
|
|
speedscale -= (int) speedscale & ~127;
|
|
|
|
for (fa = s; fa; fa = fa->texturechain)
|
|
EmitSkyPolys (fa);
|
|
|
|
glEnable (GL_BLEND);
|
|
glBindTexture (GL_TEXTURE_2D, alphaskytexture);
|
|
speedscale = realtime * 16;
|
|
speedscale -= (int) speedscale & ~127;
|
|
|
|
for (fa = s; fa; fa = fa->texturechain)
|
|
EmitSkyPolys (fa);
|
|
|
|
glDisable (GL_BLEND);
|
|
}
|
|
|
|
/*
|
|
===============
|
|
EmitBothSkyLayers
|
|
|
|
Does a sky warp on the pre-fragmented glpoly_t chain
|
|
This will be called for brushmodels, the world
|
|
will have them chained together.
|
|
===============
|
|
*/
|
|
void
|
|
EmitBothSkyLayers (msurface_t *fa)
|
|
{
|
|
glBindTexture (GL_TEXTURE_2D, solidskytexture);
|
|
speedscale = realtime * 8;
|
|
speedscale -= (int) speedscale & ~127;
|
|
|
|
EmitSkyPolys (fa);
|
|
|
|
glEnable (GL_BLEND);
|
|
glBindTexture (GL_TEXTURE_2D, alphaskytexture);
|
|
speedscale = realtime * 16;
|
|
speedscale -= (int) speedscale & ~127;
|
|
|
|
EmitSkyPolys (fa);
|
|
|
|
glDisable (GL_BLEND);
|
|
}
|