mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-27 00:39:41 +03:00
355 lines
6.9 KiB
C
355 lines
6.9 KiB
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.
|
|
|
|
*/
|
|
// r_light.c
|
|
|
|
#include "quakedef.h"
|
|
|
|
int r_dlightframecount;
|
|
|
|
|
|
/*
|
|
==================
|
|
R_AnimateLight
|
|
==================
|
|
*/
|
|
void R_AnimateLight (void)
|
|
{
|
|
int i,j,k;
|
|
|
|
//
|
|
// light animations
|
|
// 'm' is normal light, 'a' is no light, 'z' is double bright
|
|
i = (int)(cl.time*10);
|
|
for (j=0 ; j<MAX_LIGHTSTYLES ; j++)
|
|
{
|
|
if (!cl_lightstyle[j].length)
|
|
{
|
|
d_lightstylevalue[j] = 256;
|
|
continue;
|
|
}
|
|
k = i % cl_lightstyle[j].length;
|
|
k = cl_lightstyle[j].map[k] - 'a';
|
|
k = k*22;
|
|
d_lightstylevalue[j] = k;
|
|
}
|
|
}
|
|
|
|
/*
|
|
=============================================================================
|
|
|
|
DYNAMIC LIGHTS BLEND RENDERING
|
|
|
|
=============================================================================
|
|
*/
|
|
|
|
void AddLightBlend (float r, float g, float b, float a2)
|
|
{
|
|
float a;
|
|
|
|
v_blend[3] = a = v_blend[3] + a2*(1-v_blend[3]);
|
|
|
|
a2 = a2/a;
|
|
|
|
v_blend[0] = v_blend[1]*(1-a2) + r*a2;
|
|
v_blend[1] = v_blend[1]*(1-a2) + g*a2;
|
|
v_blend[2] = v_blend[2]*(1-a2) + b*a2;
|
|
}
|
|
|
|
void R_RenderDlight (dlight_t *light)
|
|
{
|
|
int i, j;
|
|
float a;
|
|
vec3_t v;
|
|
float rad;
|
|
|
|
rad = light->radius * 0.35;
|
|
|
|
VectorSubtract (light->origin, r_origin, v);
|
|
if (Length (v) < rad)
|
|
{ // view is inside the dlight
|
|
AddLightBlend (1, 0.5, 0, light->radius * 0.0003);
|
|
return;
|
|
}
|
|
|
|
glBegin (GL_TRIANGLE_FAN);
|
|
glColor3f (0.2,0.1,0.0);
|
|
for (i=0 ; i<3 ; i++)
|
|
v[i] = light->origin[i] - vpn[i]*rad;
|
|
glVertex3fv (v);
|
|
glColor3f (0,0,0);
|
|
for (i=16 ; i>=0 ; i--)
|
|
{
|
|
a = i/16.0 * M_PI*2;
|
|
for (j=0 ; j<3 ; j++)
|
|
v[j] = light->origin[j] + vright[j]*cos(a)*rad
|
|
+ vup[j]*sin(a)*rad;
|
|
glVertex3fv (v);
|
|
}
|
|
glEnd ();
|
|
}
|
|
|
|
/*
|
|
=============
|
|
R_RenderDlights
|
|
=============
|
|
*/
|
|
void R_RenderDlights (void)
|
|
{
|
|
int i;
|
|
dlight_t *l;
|
|
|
|
if (!gl_flashblend.value)
|
|
return;
|
|
|
|
r_dlightframecount = r_framecount + 1; // because the count hasn't
|
|
// advanced yet for this frame
|
|
glDepthMask (0);
|
|
glDisable (GL_TEXTURE_2D);
|
|
glShadeModel (GL_SMOOTH);
|
|
glEnable (GL_BLEND);
|
|
glBlendFunc (GL_ONE, GL_ONE);
|
|
|
|
l = cl_dlights;
|
|
for (i=0 ; i<MAX_DLIGHTS ; i++, l++)
|
|
{
|
|
if (l->die < cl.time || !l->radius)
|
|
continue;
|
|
R_RenderDlight (l);
|
|
}
|
|
|
|
glColor3f (1,1,1);
|
|
glDisable (GL_BLEND);
|
|
glEnable (GL_TEXTURE_2D);
|
|
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
glDepthMask (1);
|
|
}
|
|
|
|
|
|
/*
|
|
=============================================================================
|
|
|
|
DYNAMIC LIGHTS
|
|
|
|
=============================================================================
|
|
*/
|
|
|
|
/*
|
|
=============
|
|
R_MarkLights
|
|
=============
|
|
*/
|
|
void R_MarkLights (dlight_t *light, int bit, mnode_t *node)
|
|
{
|
|
mplane_t *splitplane;
|
|
float dist;
|
|
msurface_t *surf;
|
|
int i;
|
|
|
|
if (node->contents < 0)
|
|
return;
|
|
|
|
splitplane = node->plane;
|
|
dist = DotProduct (light->origin, splitplane->normal) - splitplane->dist;
|
|
|
|
if (dist > light->radius)
|
|
{
|
|
R_MarkLights (light, bit, node->children[0]);
|
|
return;
|
|
}
|
|
if (dist < -light->radius)
|
|
{
|
|
R_MarkLights (light, bit, node->children[1]);
|
|
return;
|
|
}
|
|
|
|
// mark the polygons
|
|
surf = cl.worldmodel->surfaces + node->firstsurface;
|
|
for (i=0 ; i<node->numsurfaces ; i++, surf++)
|
|
{
|
|
if (surf->dlightframe != r_dlightframecount)
|
|
{
|
|
surf->dlightbits = 0;
|
|
surf->dlightframe = r_dlightframecount;
|
|
}
|
|
surf->dlightbits |= bit;
|
|
}
|
|
|
|
R_MarkLights (light, bit, node->children[0]);
|
|
R_MarkLights (light, bit, node->children[1]);
|
|
}
|
|
|
|
|
|
/*
|
|
=============
|
|
R_PushDlights
|
|
=============
|
|
*/
|
|
void R_PushDlights (void)
|
|
{
|
|
int i;
|
|
dlight_t *l;
|
|
|
|
if (gl_flashblend.value)
|
|
return;
|
|
|
|
r_dlightframecount = r_framecount + 1; // because the count hasn't
|
|
// advanced yet for this frame
|
|
l = cl_dlights;
|
|
|
|
for (i=0 ; i<MAX_DLIGHTS ; i++, l++)
|
|
{
|
|
if (l->die < cl.time || !l->radius)
|
|
continue;
|
|
R_MarkLights ( l, 1<<i, cl.worldmodel->nodes );
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
=============================================================================
|
|
|
|
LIGHT SAMPLING
|
|
|
|
=============================================================================
|
|
*/
|
|
|
|
mplane_t *lightplane;
|
|
vec3_t lightspot;
|
|
|
|
int RecursiveLightPoint (mnode_t *node, vec3_t start, vec3_t end)
|
|
{
|
|
int r;
|
|
float front, back, frac;
|
|
int side;
|
|
mplane_t *plane;
|
|
vec3_t mid;
|
|
msurface_t *surf;
|
|
int s, t, ds, dt;
|
|
int i;
|
|
mtexinfo_t *tex;
|
|
byte *lightmap;
|
|
unsigned scale;
|
|
int maps;
|
|
|
|
if (node->contents < 0)
|
|
return -1; // didn't hit anything
|
|
|
|
// calculate mid point
|
|
|
|
// FIXME: optimize for axial
|
|
plane = node->plane;
|
|
front = DotProduct (start, plane->normal) - plane->dist;
|
|
back = DotProduct (end, plane->normal) - plane->dist;
|
|
side = front < 0;
|
|
|
|
if ( (back < 0) == side)
|
|
return RecursiveLightPoint (node->children[side], start, end);
|
|
|
|
frac = front / (front-back);
|
|
mid[0] = start[0] + (end[0] - start[0])*frac;
|
|
mid[1] = start[1] + (end[1] - start[1])*frac;
|
|
mid[2] = start[2] + (end[2] - start[2])*frac;
|
|
|
|
// go down front side
|
|
r = RecursiveLightPoint (node->children[side], start, mid);
|
|
if (r >= 0)
|
|
return r; // hit something
|
|
|
|
if ( (back < 0) == side )
|
|
return -1; // didn't hit anuthing
|
|
|
|
// check for impact on this node
|
|
VectorCopy (mid, lightspot);
|
|
lightplane = plane;
|
|
|
|
surf = cl.worldmodel->surfaces + node->firstsurface;
|
|
for (i=0 ; i<node->numsurfaces ; i++, surf++)
|
|
{
|
|
if (surf->flags & SURF_DRAWTILED)
|
|
continue; // no lightmaps
|
|
|
|
tex = surf->texinfo;
|
|
|
|
s = DotProduct (mid, tex->vecs[0]) + tex->vecs[0][3];
|
|
t = DotProduct (mid, tex->vecs[1]) + tex->vecs[1][3];;
|
|
|
|
if (s < surf->texturemins[0] ||
|
|
t < surf->texturemins[1])
|
|
continue;
|
|
|
|
ds = s - surf->texturemins[0];
|
|
dt = t - surf->texturemins[1];
|
|
|
|
if ( ds > surf->extents[0] || dt > surf->extents[1] )
|
|
continue;
|
|
|
|
if (!surf->samples)
|
|
return 0;
|
|
|
|
ds >>= 4;
|
|
dt >>= 4;
|
|
|
|
lightmap = surf->samples;
|
|
r = 0;
|
|
if (lightmap)
|
|
{
|
|
|
|
lightmap += dt * ((surf->extents[0]>>4)+1) + ds;
|
|
|
|
for (maps = 0 ; maps < MAXLIGHTMAPS && surf->styles[maps] != 255 ;
|
|
maps++)
|
|
{
|
|
scale = d_lightstylevalue[surf->styles[maps]];
|
|
r += *lightmap * scale;
|
|
lightmap += ((surf->extents[0]>>4)+1) *
|
|
((surf->extents[1]>>4)+1);
|
|
}
|
|
|
|
r >>= 8;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
// go down back side
|
|
return RecursiveLightPoint (node->children[!side], mid, end);
|
|
}
|
|
|
|
int R_LightPoint (vec3_t p)
|
|
{
|
|
vec3_t end;
|
|
int r;
|
|
|
|
if (!cl.worldmodel->lightdata)
|
|
return 255;
|
|
|
|
end[0] = p[0];
|
|
end[1] = p[1];
|
|
end[2] = p[2] - 2048;
|
|
|
|
r = RecursiveLightPoint (cl.worldmodel->nodes, p, end);
|
|
|
|
if (r == -1)
|
|
r = 0;
|
|
|
|
return r;
|
|
}
|
|
|