273 lines
6.4 KiB
C
273 lines
6.4 KiB
C
/*
|
|
Copyright (C) 1996-2001 Id Software, Inc.
|
|
Copyright (C) 2002-2009 John Fitzgibbons and others
|
|
Copyright (C) 2010-2014 QuakeSpasm developers
|
|
|
|
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_warp.c -- warping animation support
|
|
|
|
#include "quakedef.h"
|
|
|
|
extern cvar_t r_drawflat;
|
|
|
|
cvar_t r_oldwater = {"r_oldwater", "0", CVAR_ARCHIVE};
|
|
cvar_t r_waterquality = {"r_waterquality", "8", CVAR_NONE};
|
|
cvar_t r_waterwarp = {"r_waterwarp", "1", CVAR_NONE};
|
|
|
|
int gl_warpimagesize;
|
|
float load_subdivide_size; //johnfitz -- remember what subdivide_size value was when this map was loaded
|
|
|
|
float turbsin[] =
|
|
{
|
|
#include "gl_warp_sin.h"
|
|
};
|
|
|
|
#define WARPCALC(s,t) ((s + turbsin[(int)((t*2)+(cl.time*(128.0/M_PI))) & 255]) * (1.0/64)) //johnfitz -- correct warp
|
|
#define WARPCALC2(s,t) ((s + turbsin[(int)((t*0.125+cl.time)*(128.0/M_PI)) & 255]) * (1.0/64)) //johnfitz -- old warp
|
|
|
|
//==============================================================================
|
|
//
|
|
// OLD-STYLE WATER
|
|
//
|
|
//==============================================================================
|
|
|
|
extern qmodel_t *loadmodel;
|
|
|
|
msurface_t *warpface;
|
|
|
|
cvar_t gl_subdivide_size = {"gl_subdivide_size", "128", CVAR_ARCHIVE};
|
|
|
|
void BoundPoly (int numverts, float *verts, vec3_t mins, vec3_t maxs)
|
|
{
|
|
int i, j;
|
|
float *v;
|
|
|
|
mins[0] = mins[1] = mins[2] = 999999999;
|
|
maxs[0] = maxs[1] = maxs[2] = -999999999;
|
|
v = verts;
|
|
for (i=0 ; i<numverts ; i++)
|
|
for (j=0 ; j<3 ; j++, v++)
|
|
{
|
|
if (*v < mins[j])
|
|
mins[j] = *v;
|
|
if (*v > maxs[j])
|
|
maxs[j] = *v;
|
|
}
|
|
}
|
|
|
|
void SubdividePolygon (int numverts, float *verts)
|
|
{
|
|
int i, j, k;
|
|
vec3_t mins, maxs;
|
|
float m;
|
|
float *v;
|
|
vec3_t front[64], back[64];
|
|
int f, b;
|
|
float dist[64];
|
|
float frac;
|
|
glpoly_t *poly;
|
|
float s, t;
|
|
|
|
if (numverts > 60)
|
|
Sys_Error ("numverts = %i", numverts);
|
|
|
|
BoundPoly (numverts, verts, mins, maxs);
|
|
|
|
for (i=0 ; i<3 ; i++)
|
|
{
|
|
m = (mins[i] + maxs[i]) * 0.5;
|
|
m = gl_subdivide_size.value * floor (m/gl_subdivide_size.value + 0.5);
|
|
if (maxs[i] - m < 8)
|
|
continue;
|
|
if (m - mins[i] < 8)
|
|
continue;
|
|
|
|
// cut it
|
|
v = verts + i;
|
|
for (j=0 ; j<numverts ; j++, v+= 3)
|
|
dist[j] = *v - m;
|
|
|
|
// wrap cases
|
|
dist[j] = dist[0];
|
|
v-=i;
|
|
VectorCopy (verts, v);
|
|
|
|
f = b = 0;
|
|
v = verts;
|
|
for (j=0 ; j<numverts ; j++, v+= 3)
|
|
{
|
|
if (dist[j] >= 0)
|
|
{
|
|
VectorCopy (v, front[f]);
|
|
f++;
|
|
}
|
|
if (dist[j] <= 0)
|
|
{
|
|
VectorCopy (v, back[b]);
|
|
b++;
|
|
}
|
|
if (dist[j] == 0 || dist[j+1] == 0)
|
|
continue;
|
|
if ( (dist[j] > 0) != (dist[j+1] > 0) )
|
|
{
|
|
// clip point
|
|
frac = dist[j] / (dist[j] - dist[j+1]);
|
|
for (k=0 ; k<3 ; k++)
|
|
front[f][k] = back[b][k] = v[k] + frac*(v[3+k] - v[k]);
|
|
f++;
|
|
b++;
|
|
}
|
|
}
|
|
|
|
SubdividePolygon (f, front[0]);
|
|
SubdividePolygon (b, back[0]);
|
|
return;
|
|
}
|
|
|
|
poly = (glpoly_t *) Hunk_Alloc (sizeof(glpoly_t) + (numverts-4) * VERTEXSIZE*sizeof(float));
|
|
poly->next = warpface->polys->next;
|
|
warpface->polys->next = poly;
|
|
poly->numverts = numverts;
|
|
for (i=0 ; i<numverts ; i++, verts+= 3)
|
|
{
|
|
VectorCopy (verts, poly->verts[i]);
|
|
s = DotProduct (verts, warpface->texinfo->vecs[0]);
|
|
t = DotProduct (verts, warpface->texinfo->vecs[1]);
|
|
poly->verts[i][3] = s;
|
|
poly->verts[i][4] = t;
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
GL_SubdivideSurface
|
|
================
|
|
*/
|
|
void GL_SubdivideSurface (msurface_t *fa)
|
|
{
|
|
vec3_t verts[64];
|
|
int i;
|
|
|
|
warpface = fa;
|
|
|
|
//the first poly in the chain is the undivided poly for newwater rendering.
|
|
//grab the verts from that.
|
|
for (i=0; i<fa->polys->numverts; i++)
|
|
VectorCopy (fa->polys->verts[i], verts[i]);
|
|
|
|
SubdividePolygon (fa->polys->numverts, verts[0]);
|
|
}
|
|
|
|
/*
|
|
================
|
|
DrawWaterPoly -- johnfitz
|
|
================
|
|
*/
|
|
void DrawWaterPoly (glpoly_t *p)
|
|
{
|
|
float *v;
|
|
int i;
|
|
|
|
if (load_subdivide_size > 48)
|
|
{
|
|
glBegin (GL_POLYGON);
|
|
v = p->verts[0];
|
|
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
|
|
{
|
|
glTexCoord2f (WARPCALC2(v[3],v[4]), WARPCALC2(v[4],v[3]));
|
|
glVertex3fv (v);
|
|
}
|
|
glEnd ();
|
|
}
|
|
else
|
|
{
|
|
glBegin (GL_POLYGON);
|
|
v = p->verts[0];
|
|
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
|
|
{
|
|
glTexCoord2f (WARPCALC(v[3],v[4]), WARPCALC(v[4],v[3]));
|
|
glVertex3fv (v);
|
|
}
|
|
glEnd ();
|
|
}
|
|
}
|
|
|
|
//==============================================================================
|
|
//
|
|
// RENDER-TO-FRAMEBUFFER WATER
|
|
//
|
|
//==============================================================================
|
|
|
|
/*
|
|
=============
|
|
R_UpdateWarpTextures -- johnfitz -- each frame, update warping textures
|
|
=============
|
|
*/
|
|
void R_UpdateWarpTextures (void)
|
|
{
|
|
texture_t *tx;
|
|
int i;
|
|
float x, y, x2, warptess;
|
|
|
|
if (r_oldwater.value || cl.paused || r_drawflat_cheatsafe || r_lightmap_cheatsafe)
|
|
return;
|
|
|
|
warptess = 128.0/CLAMP (3.0, floor(r_waterquality.value), 64.0);
|
|
|
|
for (i=0; i<cl.worldmodel->numtextures; i++)
|
|
{
|
|
if (!(tx = cl.worldmodel->textures[i]))
|
|
continue;
|
|
|
|
if (!tx->update_warp)
|
|
continue;
|
|
|
|
//render warp
|
|
GL_SetCanvas (CANVAS_WARPIMAGE);
|
|
GL_Bind (tx->gltexture);
|
|
for (x=0.0; x<128.0; x=x2)
|
|
{
|
|
x2 = x + warptess;
|
|
glBegin (GL_TRIANGLE_STRIP);
|
|
for (y=0.0; y<128.01; y+=warptess) // .01 for rounding errors
|
|
{
|
|
glTexCoord2f (WARPCALC(x,y), WARPCALC(y,x));
|
|
glVertex2f (x,y);
|
|
glTexCoord2f (WARPCALC(x2,y), WARPCALC(y,x2));
|
|
glVertex2f (x2,y);
|
|
}
|
|
glEnd();
|
|
}
|
|
|
|
//copy to texture
|
|
GL_Bind (tx->warpimage);
|
|
glCopyTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, glx, gly+glheight-gl_warpimagesize, gl_warpimagesize, gl_warpimagesize);
|
|
|
|
tx->update_warp = false;
|
|
}
|
|
|
|
// ericw -- workaround for osx 10.6 driver bug when using FSAA. R_Clear only clears the warpimage part of the screen.
|
|
GL_SetCanvas(CANVAS_DEFAULT);
|
|
|
|
//if warp render went down into sbar territory, we need to be sure to refresh it next frame
|
|
if (gl_warpimagesize + sb_lines > glheight)
|
|
Sbar_Changed ();
|
|
|
|
//if viewsize is less than 100, we need to redraw the frame around the viewport
|
|
scr_tileclear_updates = 0;
|
|
}
|