void Pass::setup(GLRenderer *) {
vec4_t ambient = { sunLight.ambient[0] * 0.8, sunLight.ambient[1] * 0.8, sunLight.ambient[2] * 0.95, 1 };
GLSL_reset();
shader = NULL;
lightCount = 0;
glPushAttrib(attrib_bits);
//GL_Enable(GL_SCISSOR_TEST);
GL_SwitchTexUnit(GL_TEXTURE0_ARB);
//defaults for pass
GL_Enable(GL_BLEND);
GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
GL_Enable(GL_CULL_FACE);
GL_Enable(GL_ALPHA_TEST);
//glAlphaFunc(GL_GREATER, 0.0);
GL_ResetColor();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
//enable the lights for this pass by default
if(allowLighting()) {
if(gfx_GLSLQuality.integer <= 1)
M_MultVec3(ambient, 1.5, ambient);
GL_Enable(GL_LIGHTING);
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, true);
glShadeModel(GL_SMOOTH);
}
//GL_Enable(GL_NORMALIZE);
//framebuffer
if(gfx_postProcessing.integer) {
if(!target)
target = glScreen;
target->makeTarget();
} else {
glScreen->makeTarget();
}
//depth
GL_Enable(GL_DEPTH_TEST);
GL_DepthMask(depthMask);
GL_DepthFunc(depthFunc);
if(preclearDepth) {
glClearDepth(1.0);
glClear(GL_DEPTH_BUFFER_BIT);
}
if(viewer) {
vec4_t rect;
//FIXME: probably should be a data member for configurable pass "windows"
SET_VEC4(rect, 0, 0, viewer->width, viewer->height);
Scene_SetFrustum(viewer, rect);
Scene_BuildOccluderList(viewer);
if(gfx_debugCamera.integer>0) {
camera_t debugcam;
vec3_t back;
M_MultVec3(viewer->viewaxis[AXIS_FORWARD], -gfx_debugCamera.integer, back);
memcpy(&debugcam, viewer, sizeof(camera_t));
M_AddVec3(debugcam.origin, back, debugcam.origin);
GL_PushCamera(&debugcam);
} else {
GL_PushCamera(viewer);
//scene_cam = viewer;
}
//fog
if (viewer->fog_far > 0 && gfx_fog.integer)
{
vec4_t fog_color = { gfx_fogr.value, gfx_fogg.value, gfx_fogb.value, 0 };
GL_Enable(GL_FOG);
if(gfx_nicerFog.integer)
{
glFogf(GL_FOG_MODE, GL_EXP2);
glFogf(GL_FOG_DENSITY, 1.5 / viewer->fog_far); // Notaus: old value was fixed at 0.00072 and not appropriate for very foggy maps
}
else
{
glFogf(GL_FOG_MODE, GL_LINEAR);
}
glHint(GL_FOG_HINT, GL_NICEST);
if (viewer->fog_near > 0 && viewer->fog_far >= viewer->fog_near)
{
glFogf(GL_FOG_START, viewer->fog_near);
glFogf(GL_FOG_END, viewer->fog_far);
fog_near = viewer->fog_near;
fog_far = viewer->fog_far;
}
else
{
glFogf(GL_FOG_START, gfx_fog_near.value);
glFogf(GL_FOG_END, gfx_fog_far.value);
fog_near = gfx_fog_near.value;
fog_far = gfx_fog_far.value;
}
glFogfv(GL_FOG_COLOR, fog_color);
}
else if (gfx_fog.integer==0) {
GL_Enable(GL_FOG);
glFogf(GL_FOG_START, 90000);
glFogf(GL_FOG_END, 100000); //shaders make it better just to set this ridiculously far out
} else {
GL_Disable(GL_FOG);
}
} else {
GL_Disable(GL_FOG);
}
if(gfx_GLSL.integer)
Cvar_SetVarValue(&gfx_GLSLPass, 1);
else
GL_TexModulate(2.0);
#ifdef DEBUG
GLSL_catchLastError("Pass::setup()");
#endif
}
/**
* @brief This routine is responsible for setting the most commonly changed state in Q3.
*/
void GL_State(uint32_t stateBits)
{
uint32_t diff = stateBits ^ glState.glStateBits;
if (!diff)
{
return;
}
// check depthFunc bits
if (diff & GLS_DEPTHFUNC_BITS)
{
switch (stateBits & GLS_DEPTHFUNC_BITS)
{
default:
GL_DepthFunc(GL_LEQUAL);
break;
case GLS_DEPTHFUNC_LESS:
GL_DepthFunc(GL_LESS);
break;
case GLS_DEPTHFUNC_EQUAL:
GL_DepthFunc(GL_EQUAL);
break;
}
}
// check blend bits
if (diff & (GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS))
{
GLenum srcFactor, dstFactor;
if (stateBits & (GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS))
{
switch (stateBits & GLS_SRCBLEND_BITS)
{
case GLS_SRCBLEND_ZERO:
srcFactor = GL_ZERO;
break;
case GLS_SRCBLEND_ONE:
srcFactor = GL_ONE;
break;
case GLS_SRCBLEND_DST_COLOR:
srcFactor = GL_DST_COLOR;
break;
case GLS_SRCBLEND_ONE_MINUS_DST_COLOR:
srcFactor = GL_ONE_MINUS_DST_COLOR;
break;
case GLS_SRCBLEND_SRC_ALPHA:
srcFactor = GL_SRC_ALPHA;
break;
case GLS_SRCBLEND_ONE_MINUS_SRC_ALPHA:
srcFactor = GL_ONE_MINUS_SRC_ALPHA;
break;
case GLS_SRCBLEND_DST_ALPHA:
srcFactor = GL_DST_ALPHA;
break;
case GLS_SRCBLEND_ONE_MINUS_DST_ALPHA:
srcFactor = GL_ONE_MINUS_DST_ALPHA;
break;
case GLS_SRCBLEND_ALPHA_SATURATE:
srcFactor = GL_SRC_ALPHA_SATURATE;
break;
default:
srcFactor = GL_ONE; // to get warning to shut up
Ren_Drop("GL_State: invalid src blend state bits\n");
break;
}
switch (stateBits & GLS_DSTBLEND_BITS)
{
case GLS_DSTBLEND_ZERO:
dstFactor = GL_ZERO;
break;
case GLS_DSTBLEND_ONE:
dstFactor = GL_ONE;
break;
case GLS_DSTBLEND_SRC_COLOR:
dstFactor = GL_SRC_COLOR;
break;
case GLS_DSTBLEND_ONE_MINUS_SRC_COLOR:
dstFactor = GL_ONE_MINUS_SRC_COLOR;
break;
case GLS_DSTBLEND_SRC_ALPHA:
dstFactor = GL_SRC_ALPHA;
break;
case GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA:
dstFactor = GL_ONE_MINUS_SRC_ALPHA;
break;
case GLS_DSTBLEND_DST_ALPHA:
dstFactor = GL_DST_ALPHA;
break;
case GLS_DSTBLEND_ONE_MINUS_DST_ALPHA:
dstFactor = GL_ONE_MINUS_DST_ALPHA;
break;
default:
dstFactor = GL_ONE; // to get warning to shut up
Ren_Drop("GL_State: invalid dst blend state bits\n");
break;
}
glEnable(GL_BLEND);
GL_BlendFunc(srcFactor, dstFactor);
}
else
{
glDisable(GL_BLEND);
}
}
// check colormask
if (diff & GLS_COLORMASK_BITS)
{
if (stateBits & GLS_COLORMASK_BITS)
{
GL_ColorMask((stateBits & GLS_REDMASK_FALSE) ? GL_FALSE : GL_TRUE,
(stateBits & GLS_GREENMASK_FALSE) ? GL_FALSE : GL_TRUE,
(stateBits & GLS_BLUEMASK_FALSE) ? GL_FALSE : GL_TRUE,
(stateBits & GLS_ALPHAMASK_FALSE) ? GL_FALSE : GL_TRUE);
}
else
{
GL_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
}
}
// check depthmask
if (diff & GLS_DEPTHMASK_TRUE)
{
if (stateBits & GLS_DEPTHMASK_TRUE)
{
GL_DepthMask(GL_TRUE);
}
else
{
GL_DepthMask(GL_FALSE);
}
}
// fill/line mode
if (diff & GLS_POLYMODE_LINE)
{
if (stateBits & GLS_POLYMODE_LINE)
{
GL_PolygonMode(GL_FRONT_AND_BACK, GL_LINE);
}
else
{
GL_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
}
}
// depthtest
if (diff & GLS_DEPTHTEST_DISABLE)
{
if (stateBits & GLS_DEPTHTEST_DISABLE)
{
glDisable(GL_DEPTH_TEST);
}
else
{
glEnable(GL_DEPTH_TEST);
}
}
// alpha test - deprecated in OpenGL 3.0
#if 0
if (diff & GLS_ATEST_BITS)
{
switch (stateBits & GLS_ATEST_BITS)
{
case GLS_ATEST_GT_0:
case GLS_ATEST_LT_128:
case GLS_ATEST_GE_128:
//case GLS_ATEST_GT_CUSTOM:
glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE);
break;
default:
case 0:
glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
break;
}
}
#endif
/*
if(diff & GLS_ATEST_BITS)
{
switch (stateBits & GLS_ATEST_BITS)
{
case 0:
glDisable(GL_ALPHA_TEST);
break;
case GLS_ATEST_GT_0:
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GREATER, 0.0f);
break;
case GLS_ATEST_LT_80:
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_LESS, 0.5f);
break;
case GLS_ATEST_GE_80:
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GEQUAL, 0.5f);
break;
case GLS_ATEST_GT_CUSTOM:
// FIXME
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GREATER, 0.5f);
break;
default:
assert(0);
break;
}
}
*/
// stenciltest
if (diff & GLS_STENCILTEST_ENABLE)
{
if (stateBits & GLS_STENCILTEST_ENABLE)
{
glEnable(GL_STENCIL_TEST);
}
else
{
glDisable(GL_STENCIL_TEST);
}
}
glState.glStateBits = stateBits;
}
/*
=============
R_DrawAliasVolumeShadow
based on code from BeefQuake R6
=============
*/
void R_DrawAliasVolumeShadow (maliasmodel_t *paliashdr, vec3_t bbox[8])
{
vec3_t light, temp, vecAdd;
float dist, highest, lowest, projected_distance;
float angle, cosp, sinp, cosy, siny, cosr, sinr, ix, iy, iz;
int i, lnum;
dlight_t *dl;
dl = r_newrefdef.dlights;
VectorSet(vecAdd, 680,0,1024); // set base vector, was 576,0,1024
// compute average light vector from dlights
for (i=0, lnum=0; i<r_newrefdef.num_dlights; i++, dl++)
{
if (VectorCompare(dl->origin, currententity->origin))
continue;
VectorSubtract(dl->origin, currententity->origin, temp);
dist = dl->intensity - VectorLength(temp);
if (dist <= 0)
continue;
lnum++;
// Factor in the intensity of a dlight
VectorScale (temp, dist*0.25, temp);
VectorAdd (vecAdd, temp, vecAdd);
}
VectorNormalize(vecAdd);
VectorScale(vecAdd, 1024, vecAdd);
// get projection distance from lightspot height
highest = lowest = bbox[0][2];
for (i=0; i<8; i++) {
if (bbox[i][2] > highest) highest = bbox[i][2];
if (bbox[i][2] < lowest) lowest = bbox[i][2];
}
projected_distance = (fabs(highest - lightspot[2]) + (highest-lowest)) / vecAdd[2];
VectorCopy(vecAdd, light);
/*cosy = cos(-currententity->angles[YAW] / 180 * M_PI);
siny = sin(-currententity->angles[YAW] / 180 * M_PI);
ix = light[0], iy = light[1];
light[0] = (cosy * (ix - 0) + siny * (0 - iy) + 0);
light[1] = (cosy * (iy - 0) + siny * (ix - 0) + 0);
light[2] += 8;*/
// reverse-rotate light vector based on angles
angle = -currententity->angles[PITCH] / 180 * M_PI;
cosp = cos(angle), sinp = sin(angle);
angle = -currententity->angles[YAW] / 180 * M_PI;
cosy = cos(angle), siny = sin(angle);
angle = currententity->angles[ROLL] / 180 * M_PI; // roll is backwards
cosr = cos(angle), sinr = sin(angle);
// rotate for yaw (z axis)
ix = light[0], iy = light[1];
light[0] = cosy * ix - siny * iy + 0;
light[1] = siny * ix + cosy * iy + 0;
// rotate for pitch (y axis)
ix = light[0], iz = light[2];
light[0] = cosp * ix + 0 + sinp * iz;
light[2] = -sinp * ix + 0 + cosp * iz;
// rotate for roll (x axis)
iy = light[1], iz = light[2];
light[1] = 0 + cosr * iy - sinr * iz;
light[2] = 0 + sinr * iy + cosr * iz;
// set up stenciling
if (!r_shadowvolumes->value)
{
qglPushAttrib(GL_STENCIL_BUFFER_BIT); // save stencil buffer
qglClear(GL_STENCIL_BUFFER_BIT);
qglColorMask(0,0,0,0);
GL_DepthMask(0);
GL_DepthFunc(GL_LESS);
GL_Enable(GL_STENCIL_TEST);
qglStencilFunc(GL_ALWAYS, 0, 255);
// qglStencilOp (GL_KEEP, GL_KEEP, GL_KEEP);
// qglStencilMask (255);
}
// build shadow volumes and render each to stencil buffer
for (i=0; i<paliashdr->num_meshes; i++)
{
if (paliashdr->meshes[i].skins[currententity->skinnum].renderparms.nodraw
|| paliashdr->meshes[i].skins[currententity->skinnum].renderparms.alphatest
|| paliashdr->meshes[i].skins[currententity->skinnum].renderparms.noshadow)
continue;
R_BuildShadowVolume (paliashdr, i, light, projected_distance, r_shadowvolumes->value);
GL_LockArrays (shadow_va);
if (!r_shadowvolumes->value)
{
if (gl_config.atiSeparateStencil && gl_config.extStencilWrap) // Barnes ATI stenciling
{
GL_Disable(GL_CULL_FACE);
qglStencilOpSeparateATI (GL_BACK, GL_KEEP, GL_INCR_WRAP_EXT, GL_KEEP);
qglStencilOpSeparateATI (GL_FRONT, GL_KEEP, GL_DECR_WRAP_EXT, GL_KEEP);
R_DrawShadowVolume ();
GL_Enable(GL_CULL_FACE);
}
else if (gl_config.extStencilTwoSide && gl_config.extStencilWrap) // Echon's two-sided stenciling
{
GL_Disable(GL_CULL_FACE);
qglEnable (GL_STENCIL_TEST_TWO_SIDE_EXT);
qglActiveStencilFaceEXT (GL_BACK);
qglStencilOp (GL_KEEP, GL_INCR_WRAP_EXT, GL_KEEP);
qglActiveStencilFaceEXT (GL_FRONT);
qglStencilOp (GL_KEEP, GL_DECR_WRAP_EXT, GL_KEEP);
R_DrawShadowVolume ();
qglDisable (GL_STENCIL_TEST_TWO_SIDE_EXT);
GL_Enable(GL_CULL_FACE);
}
else
{ // increment stencil if backface is behind depthbuffer
GL_CullFace(GL_BACK); // quake is backwards, this culls front faces
qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
R_DrawShadowVolume ();
// decrement stencil if frontface is behind depthbuffer
GL_CullFace(GL_FRONT); // quake is backwards, this culls back faces
qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
R_DrawShadowVolume ();
}
}
else
R_DrawShadowVolume ();
GL_UnlockArrays ();
}
// end stenciling and draw stenciled volume
if (!r_shadowvolumes->value)
{
GL_CullFace(GL_FRONT);
GL_Disable(GL_STENCIL_TEST);
GL_DepthFunc(GL_LEQUAL);
GL_DepthMask(1);
qglColorMask(1,1,1,1);
// draw shadows for this model now
R_ShadowBlend (aliasShadowAlpha * currententity->alpha); // was r_shadowalpha->value
qglPopAttrib(); // restore stencil buffer
}
}
