/* Called once per frame before drawing anything else
*/
void Sky_Draw(void)
{
int i;
// In these special render modes, the sky faces are handled in the normal world/brush renderer
if (r_drawflat_cheatsafe || r_lightmap_cheatsafe || !cv_video_drawsky.bValue)
return;
// Reset sky bounds.
for(i = 0; i < 6; i++)
{
skymins[0][i] = skymins[1][i] = 9999;
skymaxs[0][i] = skymaxs[1][i] = -9999;
}
// Process world and bmodels: draw flat-shaded sky surfs, and update skybounds
Fog_DisableGFog();
VideoLayer_Disable(VIDEO_TEXTURE_2D);
if(Fog_GetDensity() > 0)
glColor3fv(Fog_GetColor());
else
glColor3fv(skyflatcolor);
Sky_ProcessTextureChains();
Sky_ProcessEntities();
glColor3f(1.0f,1.0f,1.0f);
VideoLayer_Enable(VIDEO_TEXTURE_2D);
// Render slow sky: cloud layers or skybox
if(!r_fastsky.value && !(Fog_GetDensity() > 0 && r_skyfog.value >= 1))
{
VideoLayer_Disable(VIDEO_DEPTH_TEST);
// By default we use a skybox.
if(cSkyBoxName[0])
Sky_DrawSkyBox();
if(cv_video_drawclouds.value && gCloudTexture)
{
// Draw the scrolling clouds...
for(i = 0; i < 6; i++)
if(skymins[0][i] < skymaxs[0][i] && skymins[1][i] < skymaxs[1][i])
Sky_DrawFace(i);
}
VideoLayer_Enable(VIDEO_DEPTH_TEST);
}
Fog_EnableGFog();
// 3D skybox support.
if (cl.worldmodel && (cl.worldmodel->flags & MODEL_FLAG_3DSKY))
Sky_Draw3DWorld();
}
/*
=============
Fog_StartAdditive
called before drawing stuff that is additive blended -- sets fog color to black
=============
*/
void Fog_StartAdditive (void)
{
vec3_t color = {0,0,0};
if (Fog_GetDensity() > 0)
glFogfv(GL_FOG_COLOR, color);
}
void R_RenderModelSurfsSky (r_modelsurf_t **mslist, int numms)
{
Fog_DisableGFog ();
if (skybox_name[0])
{
// we have working skybox cubemap code now
Sky_DrawCubeMap (mslist, numms);
}
// else if (gl_support_shader_objects)
// {
// R_RenderModelSurfsSkyPass (mslist, numms, SKY_GLSL);
// goto glsl_sky;
// }
else R_RenderModelSurfsSkyPass (mslist, numms, SKY_DEPTHCLIP);
// same pass for all sky fog just using the base verts
if (Fog_GetDensity () > 0 && r_skyfog.value > 0)
R_RenderModelSurfsSkyPass (mslist, numms, SKY_FOG_LAYER);
//glsl_sky:;
if (r_showtris.value)
R_RenderModelSurfsSkyPass (mslist, numms, SKY_SHOWTRIS);
Fog_EnableGFog ();
}
void Sky_DrawSkyBox (void)
{
int i;
for(i = 0; i < 6; i++)
{
if (skymins[0][i] >= skymaxs[0][i] || skymins[1][i] >= skymaxs[1][i])
continue;
Video_SetTexture(gSkyBoxTexture[skytexorder[i]]);
#if 1 //FIXME: this is to avoid tjunctions until i can do it the right way
skymins[0][i] = -1;
skymins[1][i] = -1;
skymaxs[0][i] = 1;
skymaxs[1][i] = 1;
#endif
glBegin(GL_QUADS);
Sky_EmitSkyBoxVertex (skymins[0][i], skymins[1][i], i);
Sky_EmitSkyBoxVertex (skymins[0][i], skymaxs[1][i], i);
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymaxs[1][i], i);
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymins[1][i], i);
glEnd();
rs_skypolys++;
rs_skypasses++;
if (Fog_GetDensity() > 0 && r_skyfog.value > 0)
{
float *c;
c = Fog_GetColor();
VideoLayer_Enable(VIDEO_BLEND);
VideoLayer_Disable(VIDEO_TEXTURE_2D);
glColor4f(c[0], c[1], c[2], Math_Clamp(0, r_skyfog.value, 1.0f));
glBegin(GL_QUADS);
Sky_EmitSkyBoxVertex (skymins[0][i], skymins[1][i], i);
Sky_EmitSkyBoxVertex (skymins[0][i], skymaxs[1][i], i);
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymaxs[1][i], i);
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymins[1][i], i);
glEnd();
glColor3f(1.0f,1.0f,1.0f);
VideoLayer_Enable(VIDEO_TEXTURE_2D);
VideoLayer_Disable(VIDEO_BLEND);
rs_skypasses++;
}
}
}
void Sky_DrawFaceQuad(glpoly_t *p)
{
float s,t,
*v;
int i;
glColor3f(1.0f,1.0f,1.0f);
Video_SetTexture(gCloudTexture);
VideoLayer_Enable(VIDEO_BLEND);
VideoLayer_BlendFunc(VIDEO_BLEND_ONE, VIDEO_BLEND_ONE);
glBegin(GL_QUADS);
for (i = 0, v = p->verts[0]; i < 4; i++, v += VERTEXSIZE)
{
Sky_GetTexCoord(v,cv_sky_scrollspeed.value,&s,&t);
glTexCoord2f(s,t);
glVertex3fv(v);
}
glEnd();
VideoLayer_BlendFunc(VIDEO_BLEND_DEFAULT);
rs_skypolys++;
rs_skypasses++;
if(Fog_GetDensity() > 0 && r_skyfog.value > 0)
{
float *c = Fog_GetColor();
VideoLayer_Disable(VIDEO_TEXTURE_2D);
glColor4f(c[0], c[1], c[2], Math_Clamp(0.0, r_skyfog.value, 1.0));
glBegin(GL_QUADS);
for(i = 0,v = p->verts[0]; i < 4; i++,v += VERTEXSIZE)
glVertex3fv(v);
glEnd();
glColor3f(1.0f,1.0f,1.0f);
VideoLayer_Enable(VIDEO_TEXTURE_2D);
rs_skypasses++;
}
VideoLayer_Disable(VIDEO_BLEND);
}
/*
=============
Fog_StopAdditive
called after drawing stuff that is additive blended -- restores fog color
=============
*/
void Fog_StopAdditive (void)
{
if (Fog_GetDensity() > 0)
glFogfv(GL_FOG_COLOR, Fog_GetColor());
}
/*
=============
Fog_DisableGFog
called after drawing stuff that should be fogged
=============
*/
void Fog_DisableGFog (void)
{
if (Fog_GetDensity() > 0)
glDisable(GL_FOG);
}
/*
=============
Fog_EnableGFog
called before drawing stuff that should be fogged
=============
*/
void Fog_EnableGFog (void)
{
if (Fog_GetDensity() > 0)
glEnable(GL_FOG);
}
/*
=============
Fog_SetupFrame
called at the beginning of each frame
=============
*/
void Fog_SetupFrame (void)
{
glFogfv(GL_FOG_COLOR, Fog_GetColor());
glFogf(GL_FOG_DENSITY, Fog_GetDensity() / 64.0);
}
