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Diffstat (limited to 'src/renderer/tr_light.c')
| -rw-r--r-- | src/renderer/tr_light.c | 395 |
1 files changed, 0 insertions, 395 deletions
diff --git a/src/renderer/tr_light.c b/src/renderer/tr_light.c deleted file mode 100644 index 36c1c480..00000000 --- a/src/renderer/tr_light.c +++ /dev/null @@ -1,395 +0,0 @@ -/* -=========================================================================== -Copyright (C) 1999-2005 Id Software, Inc. -Copyright (C) 2000-2009 Darklegion Development - -This file is part of Tremulous. - -Tremulous 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. - -Tremulous 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 Tremulous; if not, write to the Free Software -Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -=========================================================================== -*/ -// tr_light.c - -#include "tr_local.h" - -#define DLIGHT_AT_RADIUS 16 -// at the edge of a dlight's influence, this amount of light will be added - -#define DLIGHT_MINIMUM_RADIUS 16 -// never calculate a range less than this to prevent huge light numbers - - -/* -=============== -R_TransformDlights - -Transforms the origins of an array of dlights. -Used by both the front end (for DlightBmodel) and -the back end (before doing the lighting calculation) -=============== -*/ -void R_TransformDlights( int count, dlight_t *dl, orientationr_t *or) { - int i; - vec3_t temp; - - for ( i = 0 ; i < count ; i++, dl++ ) { - VectorSubtract( dl->origin, or->origin, temp ); - dl->transformed[0] = DotProduct( temp, or->axis[0] ); - dl->transformed[1] = DotProduct( temp, or->axis[1] ); - dl->transformed[2] = DotProduct( temp, or->axis[2] ); - } -} - -/* -============= -R_DlightBmodel - -Determine which dynamic lights may effect this bmodel -============= -*/ -void R_DlightBmodel( bmodel_t *bmodel ) { - int i, j; - dlight_t *dl; - int mask; - msurface_t *surf; - - // transform all the lights - R_TransformDlights( tr.refdef.num_dlights, tr.refdef.dlights, &tr.or ); - - mask = 0; - for ( i=0 ; i<tr.refdef.num_dlights ; i++ ) { - dl = &tr.refdef.dlights[i]; - - // see if the point is close enough to the bounds to matter - for ( j = 0 ; j < 3 ; j++ ) { - if ( dl->transformed[j] - bmodel->bounds[1][j] > dl->radius ) { - break; - } - if ( bmodel->bounds[0][j] - dl->transformed[j] > dl->radius ) { - break; - } - } - if ( j < 3 ) { - continue; - } - - // we need to check this light - mask |= 1 << i; - } - - tr.currentEntity->needDlights = (mask != 0); - - // set the dlight bits in all the surfaces - for ( i = 0 ; i < bmodel->numSurfaces ; i++ ) { - surf = bmodel->firstSurface + i; - - if ( *surf->data == SF_FACE ) { - ((srfSurfaceFace_t *)surf->data)->dlightBits = mask; - } else if ( *surf->data == SF_GRID ) { - ((srfGridMesh_t *)surf->data)->dlightBits = mask; - } else if ( *surf->data == SF_TRIANGLES ) { - ((srfTriangles_t *)surf->data)->dlightBits = mask; - } - } -} - - -/* -============================================================================= - -LIGHT SAMPLING - -============================================================================= -*/ - -extern cvar_t *r_ambientScale; -extern cvar_t *r_directedScale; -extern cvar_t *r_debugLight; - -/* -================= -R_SetupEntityLightingGrid - -================= -*/ -static void R_SetupEntityLightingGrid( trRefEntity_t *ent ) { - vec3_t lightOrigin; - int pos[3]; - int i, j; - byte *gridData; - float frac[3]; - int gridStep[3]; - vec3_t direction; - float totalFactor; - - if ( ent->e.renderfx & RF_LIGHTING_ORIGIN ) { - // seperate lightOrigins are needed so an object that is - // sinking into the ground can still be lit, and so - // multi-part models can be lit identically - VectorCopy( ent->e.lightingOrigin, lightOrigin ); - } else { - VectorCopy( ent->e.origin, lightOrigin ); - } - - VectorSubtract( lightOrigin, tr.world->lightGridOrigin, lightOrigin ); - for ( i = 0 ; i < 3 ; i++ ) { - float v; - - v = lightOrigin[i]*tr.world->lightGridInverseSize[i]; - pos[i] = floor( v ); - frac[i] = v - pos[i]; - if ( pos[i] < 0 ) { - pos[i] = 0; - } else if ( pos[i] >= tr.world->lightGridBounds[i] - 1 ) { - pos[i] = tr.world->lightGridBounds[i] - 1; - } - } - - VectorClear( ent->ambientLight ); - VectorClear( ent->directedLight ); - VectorClear( direction ); - - assert( tr.world->lightGridData ); // NULL with -nolight maps - - // trilerp the light value - gridStep[0] = 8; - gridStep[1] = 8 * tr.world->lightGridBounds[0]; - gridStep[2] = 8 * tr.world->lightGridBounds[0] * tr.world->lightGridBounds[1]; - gridData = tr.world->lightGridData + pos[0] * gridStep[0] - + pos[1] * gridStep[1] + pos[2] * gridStep[2]; - - totalFactor = 0; - for ( i = 0 ; i < 8 ; i++ ) { - float factor; - byte *data; - int lat, lng; - vec3_t normal; - #if idppc - float d0, d1, d2, d3, d4, d5; - #endif - factor = 1.0; - data = gridData; - for ( j = 0 ; j < 3 ; j++ ) { - if ( i & (1<<j) ) { - factor *= frac[j]; - data += gridStep[j]; - } else { - factor *= (1.0f - frac[j]); - } - } - - if ( !(data[0]+data[1]+data[2]) ) { - continue; // ignore samples in walls - } - totalFactor += factor; - #if idppc - d0 = data[0]; d1 = data[1]; d2 = data[2]; - d3 = data[3]; d4 = data[4]; d5 = data[5]; - - ent->ambientLight[0] += factor * d0; - ent->ambientLight[1] += factor * d1; - ent->ambientLight[2] += factor * d2; - - ent->directedLight[0] += factor * d3; - ent->directedLight[1] += factor * d4; - ent->directedLight[2] += factor * d5; - #else - ent->ambientLight[0] += factor * data[0]; - ent->ambientLight[1] += factor * data[1]; - ent->ambientLight[2] += factor * data[2]; - - ent->directedLight[0] += factor * data[3]; - ent->directedLight[1] += factor * data[4]; - ent->directedLight[2] += factor * data[5]; - #endif - lat = data[7]; - lng = data[6]; - lat *= (FUNCTABLE_SIZE/256); - lng *= (FUNCTABLE_SIZE/256); - - // decode X as cos( lat ) * sin( long ) - // decode Y as sin( lat ) * sin( long ) - // decode Z as cos( long ) - - normal[0] = tr.sinTable[(lat+(FUNCTABLE_SIZE/4))&FUNCTABLE_MASK] * tr.sinTable[lng]; - normal[1] = tr.sinTable[lat] * tr.sinTable[lng]; - normal[2] = tr.sinTable[(lng+(FUNCTABLE_SIZE/4))&FUNCTABLE_MASK]; - - VectorMA( direction, factor, normal, direction ); - } - - if ( totalFactor > 0 && totalFactor < 0.99 ) { - totalFactor = 1.0f / totalFactor; - VectorScale( ent->ambientLight, totalFactor, ent->ambientLight ); - VectorScale( ent->directedLight, totalFactor, ent->directedLight ); - } - - VectorScale( ent->ambientLight, r_ambientScale->value, ent->ambientLight ); - VectorScale( ent->directedLight, r_directedScale->value, ent->directedLight ); - - VectorNormalize2( direction, ent->lightDir ); -} - - -/* -=============== -LogLight -=============== -*/ -static void LogLight( trRefEntity_t *ent ) { - int max1, max2; - - if ( !(ent->e.renderfx & RF_FIRST_PERSON ) ) { - return; - } - - max1 = ent->ambientLight[0]; - if ( ent->ambientLight[1] > max1 ) { - max1 = ent->ambientLight[1]; - } else if ( ent->ambientLight[2] > max1 ) { - max1 = ent->ambientLight[2]; - } - - max2 = ent->directedLight[0]; - if ( ent->directedLight[1] > max2 ) { - max2 = ent->directedLight[1]; - } else if ( ent->directedLight[2] > max2 ) { - max2 = ent->directedLight[2]; - } - - ri.Printf( PRINT_ALL, "amb:%i dir:%i\n", max1, max2 ); -} - -/* -================= -R_SetupEntityLighting - -Calculates all the lighting values that will be used -by the Calc_* functions -================= -*/ -void R_SetupEntityLighting( const trRefdef_t *refdef, trRefEntity_t *ent ) { - int i; - dlight_t *dl; - float power; - vec3_t dir; - float d; - vec3_t lightDir; - vec3_t lightOrigin; - - // lighting calculations - if ( ent->lightingCalculated ) { - return; - } - ent->lightingCalculated = qtrue; - - // - // trace a sample point down to find ambient light - // - if ( ent->e.renderfx & RF_LIGHTING_ORIGIN ) { - // seperate lightOrigins are needed so an object that is - // sinking into the ground can still be lit, and so - // multi-part models can be lit identically - VectorCopy( ent->e.lightingOrigin, lightOrigin ); - } else { - VectorCopy( ent->e.origin, lightOrigin ); - } - - // if NOWORLDMODEL, only use dynamic lights (menu system, etc) - if ( !(refdef->rdflags & RDF_NOWORLDMODEL ) - && tr.world->lightGridData ) { - R_SetupEntityLightingGrid( ent ); - } else { - ent->ambientLight[0] = ent->ambientLight[1] = - ent->ambientLight[2] = tr.identityLight * 150; - ent->directedLight[0] = ent->directedLight[1] = - ent->directedLight[2] = tr.identityLight * 150; - VectorCopy( tr.sunDirection, ent->lightDir ); - } - - // bonus items and view weapons have a fixed minimum add - if ( 1 /* ent->e.renderfx & RF_MINLIGHT */ ) { - // give everything a minimum light add - ent->ambientLight[0] += tr.identityLight * 32; - ent->ambientLight[1] += tr.identityLight * 32; - ent->ambientLight[2] += tr.identityLight * 32; - } - - // - // modify the light by dynamic lights - // - d = VectorLength( ent->directedLight ); - VectorScale( ent->lightDir, d, lightDir ); - - for ( i = 0 ; i < refdef->num_dlights ; i++ ) { - dl = &refdef->dlights[i]; - VectorSubtract( dl->origin, lightOrigin, dir ); - d = VectorNormalize( dir ); - - power = DLIGHT_AT_RADIUS * ( dl->radius * dl->radius ); - if ( d < DLIGHT_MINIMUM_RADIUS ) { - d = DLIGHT_MINIMUM_RADIUS; - } - d = power / ( d * d ); - - VectorMA( ent->directedLight, d, dl->color, ent->directedLight ); - VectorMA( lightDir, d, dir, lightDir ); - } - - // clamp ambient - for ( i = 0 ; i < 3 ; i++ ) { - if ( ent->ambientLight[i] > tr.identityLightByte ) { - ent->ambientLight[i] = tr.identityLightByte; - } - } - - if ( r_debugLight->integer ) { - LogLight( ent ); - } - - // save out the byte packet version - ((byte *)&ent->ambientLightInt)[0] = ri.ftol(ent->ambientLight[0]); - ((byte *)&ent->ambientLightInt)[1] = ri.ftol(ent->ambientLight[1]); - ((byte *)&ent->ambientLightInt)[2] = ri.ftol(ent->ambientLight[2]); - ((byte *)&ent->ambientLightInt)[3] = 0xff; - - // transform the direction to local space - VectorNormalize( lightDir ); - ent->lightDir[0] = DotProduct( lightDir, ent->e.axis[0] ); - ent->lightDir[1] = DotProduct( lightDir, ent->e.axis[1] ); - ent->lightDir[2] = DotProduct( lightDir, ent->e.axis[2] ); -} - -/* -================= -R_LightForPoint -================= -*/ -int R_LightForPoint( vec3_t point, vec3_t ambientLight, vec3_t directedLight, vec3_t lightDir ) -{ - trRefEntity_t ent; - - if ( tr.world->lightGridData == NULL ) - return qfalse; - - Com_Memset(&ent, 0, sizeof(ent)); - VectorCopy( point, ent.e.origin ); - R_SetupEntityLightingGrid( &ent ); - VectorCopy(ent.ambientLight, ambientLight); - VectorCopy(ent.directedLight, directedLight); - VectorCopy(ent.lightDir, lightDir); - - return qtrue; -} |