589 lines
14 KiB
C
589 lines
14 KiB
C
/*
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gl_mirror.c - draw reflected surfaces
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Copyright (C) 2010 Uncle Mike
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#include "common.h"
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#include "client.h"
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#include "gl_local.h"
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#include "mod_local.h"
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#include "mathlib.h"
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/*
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================
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R_BeginDrawMirror
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Setup texture matrix for mirror texture
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================
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*/
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void R_BeginDrawMirror( msurface_t *fa )
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{
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matrix4x4 m1, m2, matrix;
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GLfloat genVector[4][4];
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int i;
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Matrix4x4_Copy( matrix, fa->info->mirrormatrix );
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Matrix4x4_LoadIdentity( m1 );
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Matrix4x4_ConcatScale( m1, 0.5f );
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Matrix4x4_Concat( m2, m1, matrix );
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Matrix4x4_LoadIdentity( m1 );
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Matrix4x4_ConcatTranslate( m1, 0.5f, 0.5f, 0.5f );
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Matrix4x4_Concat( matrix, m1, m2 );
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for( i = 0; i < 4; i++ )
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{
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genVector[0][i] = i == 0 ? 1 : 0;
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genVector[1][i] = i == 1 ? 1 : 0;
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genVector[2][i] = i == 2 ? 1 : 0;
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genVector[3][i] = i == 3 ? 1 : 0;
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}
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GL_TexGen( GL_S, GL_OBJECT_LINEAR );
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GL_TexGen( GL_T, GL_OBJECT_LINEAR );
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GL_TexGen( GL_R, GL_OBJECT_LINEAR );
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GL_TexGen( GL_Q, GL_OBJECT_LINEAR );
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pglTexGenfv( GL_S, GL_OBJECT_PLANE, genVector[0] );
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pglTexGenfv( GL_T, GL_OBJECT_PLANE, genVector[1] );
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pglTexGenfv( GL_R, GL_OBJECT_PLANE, genVector[2] );
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pglTexGenfv( GL_Q, GL_OBJECT_PLANE, genVector[3] );
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GL_LoadTexMatrix( matrix );
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}
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/*
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================
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R_EndDrawMirror
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Restore identity texmatrix
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================
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*/
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void R_EndDrawMirror( void )
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{
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GL_CleanUpTextureUnits( 0 );
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pglMatrixMode( GL_MODELVIEW );
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}
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/*
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=============================================================
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MIRROR RENDERING
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=============================================================
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*/
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/*
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================
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R_PlaneForMirror
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Get transformed mirrorplane and entity matrix
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================
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*/
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void R_PlaneForMirror( msurface_t *surf, mplane_t *out, matrix4x4 m )
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{
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cl_entity_t *ent;
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ASSERT( out != NULL );
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ent = RI.currententity;
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// setup mirror plane
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*out = *surf->plane;
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if( surf->flags & SURF_PLANEBACK )
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{
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VectorNegate( out->normal, out->normal );
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out->dist = -out->dist;
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}
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if( !VectorIsNull( ent->origin ) || !VectorIsNull( ent->angles ))
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{
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mplane_t tmp;
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if( !VectorIsNull( ent->angles )) Matrix4x4_CreateFromEntity( m, ent->angles, ent->origin, 1.0f );
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else Matrix4x4_CreateFromEntity( m, vec3_origin, ent->origin, 1.0f );
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tmp = *out;
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// transform mirror plane by entity matrix
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Matrix4x4_TransformPositivePlane( m, tmp.normal, tmp.dist, out->normal, &out->dist );
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}
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else Matrix4x4_LoadIdentity( m );
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}
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/*
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================
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R_AllocateMirrorTexture
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Allocate the screen texture and make copy
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================
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*/
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int R_AllocateMirrorTexture( void )
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{
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rgbdata_t r_screen;
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int i, texture;
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char txName[16];
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i = tr.num_mirrors_used;
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if( i >= MAX_MIRRORS )
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{
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MsgDev( D_ERROR, "R_AllocateMirrorTexture: mirror textures limit exceeded!\n" );
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return 0; // disable
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}
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texture = tr.mirrorTextures[i];
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tr.num_mirrors_used++;
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if( !texture )
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{
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// not initialized ?
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memset( &r_screen, 0, sizeof( r_screen ));
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Q_snprintf( txName, sizeof( txName ), "*screen%i", i );
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r_screen.width = RI.viewport[2];
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r_screen.height = RI.viewport[3];
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r_screen.type = PF_RGBA_32;
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r_screen.size = r_screen.width * r_screen.height * 4;
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r_screen.flags = IMAGE_HAS_COLOR;
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r_screen.buffer = NULL; // create empty texture for now
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tr.mirrorTextures[i] = GL_LoadTextureInternal( txName, &r_screen, TF_IMAGE, false );
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texture = tr.mirrorTextures[i];
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}
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GL_Bind( GL_TEXTURE0, texture );
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pglCopyTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, RI.viewport[0], RI.viewport[1], RI.viewport[2], RI.viewport[3], 0 );
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return texture;
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}
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/*
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================
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R_DrawMirrors
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Draw all viewpasess from mirror position
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Mirror textures will be drawn in normal pass
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================
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*/
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void R_DrawMirrors( void )
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{
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ref_instance_t oldRI;
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mplane_t plane;
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msurface_t *surf, *surf2;
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int i, oldframecount;
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mextrasurf_t *es, *tmp, *mirrorchain;
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vec3_t forward, right, up;
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vec3_t origin, angles;
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matrix4x4 mirrormatrix;
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cl_entity_t *e;
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model_t *m;
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float d;
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if( !tr.num_mirror_entities ) return; // mo mirrors for this frame
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oldRI = RI; // make refinst backup
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oldframecount = tr.framecount;
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for( i = 0; i < tr.num_mirror_entities; i++ )
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{
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mirrorchain = tr.mirror_entities[i].chain;
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for( es = mirrorchain; es != NULL; es = es->mirrorchain )
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{
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RI.currententity = e = tr.mirror_entities[i].ent;
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RI.currentmodel = m = RI.currententity->model;
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surf = es->surf;
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ASSERT( RI.currententity != NULL );
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ASSERT( RI.currentmodel != NULL );
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// NOTE: copy mirrortexture and mirrormatrix from another surfaces
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// from this entity\world that has same planes and reduce number of viewpasses
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// make sure what we have one pass at least
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if( es != mirrorchain )
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{
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for( tmp = mirrorchain; tmp != es; tmp = tmp->mirrorchain )
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{
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surf2 = tmp->surf;
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if( !tmp->mirrortexturenum )
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continue; // not filled?
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if( surf->plane->dist != surf2->plane->dist )
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continue;
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if( !VectorCompare( surf->plane->normal, surf2->plane->normal ))
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continue;
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// found surface with same plane!
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break;
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}
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if( tmp != es && tmp && tmp->mirrortexturenum )
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{
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// just copy reflection texture from surface with same plane
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Matrix4x4_Copy( es->mirrormatrix, tmp->mirrormatrix );
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es->mirrortexturenum = tmp->mirrortexturenum;
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continue; // pass skiped
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}
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}
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R_PlaneForMirror( surf, &plane, mirrormatrix );
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d = -2.0f * ( DotProduct( RI.vieworg, plane.normal ) - plane.dist );
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VectorMA( RI.vieworg, d, plane.normal, origin );
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d = -2.0f * DotProduct( RI.vforward, plane.normal );
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VectorMA( RI.vforward, d, plane.normal, forward );
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VectorNormalize( forward );
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d = -2.0f * DotProduct( RI.vright, plane.normal );
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VectorMA( RI.vright, d, plane.normal, right );
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VectorNormalize( right );
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d = -2.0f * DotProduct( RI.vup, plane.normal );
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VectorMA( RI.vup, d, plane.normal, up );
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VectorNormalize( up );
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VectorsAngles( forward, right, up, angles );
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angles[ROLL] = -angles[ROLL];
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RI.params = RP_MIRRORVIEW|RP_CLIPPLANE|RP_OLDVIEWLEAF;
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RI.clipPlane = plane;
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GL_FrustumSetPlane( &RI.frustum, FRUSTUM_NEAR, plane.normal, plane.dist );
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RI.viewangles[0] = anglemod( angles[0] );
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RI.viewangles[1] = anglemod( angles[1] );
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RI.viewangles[2] = anglemod( angles[2] );
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VectorCopy( origin, RI.vieworg );
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VectorCopy( origin, RI.cullorigin );
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// put pvsorigin before the mirror plane to avoid get full visibility on world mirrors
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if( RI.currententity == clgame.entities )
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{
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VectorMA( es->origin, 1.0f, plane.normal, origin );
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}
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else
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{
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Matrix4x4_VectorTransform( mirrormatrix, es->origin, origin );
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VectorMA( origin, 1.0f, plane.normal, origin );
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}
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VectorCopy( origin, RI.pvsorigin );
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if( GL_Support( GL_ARB_TEXTURE_NPOT_EXT ))
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{
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// allow screen size
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RI.viewport[2] = bound( 96, RI.viewport[2], 1024 );
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RI.viewport[3] = bound( 72, RI.viewport[3], 768 );
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}
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else
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{
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RI.viewport[2] = NearestPOW( RI.viewport[2], true );
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RI.viewport[3] = NearestPOW( RI.viewport[3], true );
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RI.viewport[2] = bound( 128, RI.viewport[2], 1024 );
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RI.viewport[3] = bound( 64, RI.viewport[3], 512 );
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}
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R_RenderScene();
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r_stats.c_mirror_passes++;
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es->mirrortexturenum = R_AllocateMirrorTexture();
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// create personal projection matrix for mirror
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if( VectorIsNull( e->origin ) && VectorIsNull( e->angles ))
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{
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Matrix4x4_Copy( es->mirrormatrix, RI.worldviewProjectionMatrix );
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}
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else
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{
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Matrix4x4_ConcatTransforms( RI.modelviewMatrix, RI.worldviewMatrix, mirrormatrix );
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Matrix4x4_Concat( es->mirrormatrix, RI.projectionMatrix, RI.modelviewMatrix );
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}
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RI = oldRI; // restore ref instance
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}
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// clear chain for this entity
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for( es = mirrorchain; es != NULL; )
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{
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tmp = es->mirrorchain;
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es->mirrorchain = NULL;
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es = tmp;
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}
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tr.mirror_entities[i].chain = NULL; // done
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tr.mirror_entities[i].ent = NULL;
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}
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RI.viewleaf = NULL; // force markleafs next frame
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tr.num_mirror_entities = 0;
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tr.num_mirrors_used = 0;
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}
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/*
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================
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R_RecursiveMirrorNode
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================
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*/
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void R_RecursiveMirrorNode( mnode_t *node, uint clipflags )
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{
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int i, clipped;
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msurface_t *surf, **mark;
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mleaf_t *pleaf;
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int c, side;
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float dot;
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if( node->contents == CONTENTS_SOLID )
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return; // hit a solid leaf
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if( node->visframe != tr.visframecount )
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return;
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if( clipflags )
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{
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for( i = 0; i < 6; i++ )
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{
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const mplane_t *p = &RI.frustum.planes[i];
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if( !FBitSet( clipflags, BIT( i )))
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continue;
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clipped = BoxOnPlaneSide( node->minmaxs, node->minmaxs + 3, p );
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if( clipped == 2 ) return;
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if( clipped == 1 ) ClearBits( clipflags, BIT( i ));
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}
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}
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// if a leaf node, draw stuff
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if( node->contents < 0 )
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{
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pleaf = (mleaf_t *)node;
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mark = pleaf->firstmarksurface;
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c = pleaf->nummarksurfaces;
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if( c )
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{
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do
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{
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(*mark)->visframe = tr.framecount;
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mark++;
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} while( --c );
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}
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return;
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}
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// node is just a decision point, so go down the apropriate sides
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// find which side of the node we are on
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dot = PlaneDiff( tr.modelorg, node->plane );
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side = (dot >= 0) ? 0 : 1;
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// recurse down the children, front side first
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R_RecursiveMirrorNode( node->children[side], clipflags );
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// draw stuff
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for( c = node->numsurfaces, surf = cl.worldmodel->surfaces + node->firstsurface; c; c--, surf++ )
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{
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if( !FBitSet( surf->flags, SURF_REFLECT ))
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continue;
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if( R_CullSurface( surf, &RI.frustum, clipflags ))
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continue;
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surf->info->mirrorchain = tr.mirror_entities[0].chain;
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tr.mirror_entities[0].chain = surf->info;
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}
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// recurse down the back side
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R_RecursiveMirrorNode( node->children[!side], clipflags );
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}
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/*
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=================
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R_FindBmodelMirrors
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Check all bmodel surfaces and make personal mirror chain
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=================
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*/
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void R_FindBmodelMirrors( cl_entity_t *e, qboolean static_entity )
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{
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vec3_t mins, maxs;
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msurface_t *psurf;
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model_t *clmodel;
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qboolean rotated;
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gl_frustum_t *frustum = NULL;
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int i;
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if( tr.num_mirror_entities >= MAX_MIRROR_ENTITIES )
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return;
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clmodel = e->model;
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// don't draw any water reflections if we underwater
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if( cl.local.waterlevel >= 3 && FBitSet( clmodel->flags, MODEL_LIQUID ))
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return;
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if( static_entity )
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{
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Matrix4x4_LoadIdentity( RI.objectMatrix );
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if( R_CullBox( clmodel->mins, clmodel->maxs ))
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return;
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VectorCopy( RI.cullorigin, tr.modelorg );
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frustum = &RI.frustum;
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}
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else
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{
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if( !VectorIsNull( e->angles ))
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{
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for( i = 0; i < 3; i++ )
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{
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mins[i] = e->origin[i] - clmodel->radius;
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maxs[i] = e->origin[i] + clmodel->radius;
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}
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rotated = true;
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}
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else
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{
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VectorAdd( e->origin, clmodel->mins, mins );
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VectorAdd( e->origin, clmodel->maxs, maxs );
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rotated = false;
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}
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if( R_CullBox( mins, maxs ))
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return;
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if( !VectorIsNull( e->origin ) || !VectorIsNull( e->angles ))
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{
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if( rotated ) Matrix4x4_CreateFromEntity( RI.objectMatrix, e->angles, e->origin, 1.0f );
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else Matrix4x4_CreateFromEntity( RI.objectMatrix, vec3_origin, e->origin, 1.0f );
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}
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else Matrix4x4_LoadIdentity( RI.objectMatrix );
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e->visframe = tr.framecount; // visible
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if( rotated ) Matrix4x4_VectorITransform( RI.objectMatrix, RI.cullorigin, tr.modelorg );
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else VectorSubtract( RI.cullorigin, e->origin, tr.modelorg );
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}
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psurf = &clmodel->surfaces[clmodel->firstmodelsurface];
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for( i = 0; i < clmodel->nummodelsurfaces; i++, psurf++ )
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{
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if( !FBitSet( psurf->flags, SURF_REFLECT ))
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continue;
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if( R_CullSurface( psurf, frustum, 0 ))
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continue;
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psurf->info->mirrorchain = tr.mirror_entities[tr.num_mirror_entities].chain;
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tr.mirror_entities[tr.num_mirror_entities].chain = psurf->info;
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}
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// store new mirror entity
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if( !static_entity && tr.mirror_entities[tr.num_mirror_entities].chain != NULL )
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{
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tr.mirror_entities[tr.num_mirror_entities].ent = RI.currententity;
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tr.num_mirror_entities++;
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}
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}
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/*
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=================
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R_CheckEntitiesOnList
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Check all bmodels for mirror surfaces
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=================
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*/
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void R_CheckEntitiesOnList( void )
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{
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int i;
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// world has mirror surfaces
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if( tr.mirror_entities[0].chain != NULL )
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{
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tr.mirror_entities[0].ent = clgame.entities;
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tr.num_mirror_entities++;
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}
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// check solid entities
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for( i = 0; i < tr.num_solid_entities; i++ )
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{
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RI.currententity = tr.solid_entities[i];
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RI.currentmodel = RI.currententity->model;
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ASSERT( RI.currententity != NULL );
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ASSERT( RI.currententity->model != NULL );
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switch( RI.currentmodel->type )
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{
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case mod_brush:
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R_FindBmodelMirrors( RI.currententity, false );
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break;
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}
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}
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// check translucent entities
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for( i = 0; i < tr.num_trans_entities; i++ )
|
|
{
|
|
RI.currententity = tr.trans_entities[i];
|
|
RI.currentmodel = RI.currententity->model;
|
|
|
|
ASSERT( RI.currententity != NULL );
|
|
ASSERT( RI.currententity->model != NULL );
|
|
|
|
switch( RI.currentmodel->type )
|
|
{
|
|
case mod_brush:
|
|
R_FindBmodelMirrors( RI.currententity, false );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
R_FindMirrors
|
|
|
|
Build mirror chains for this frame
|
|
================
|
|
*/
|
|
void R_FindMirrors( void )
|
|
{
|
|
if( !world.has_mirrors || RI.drawOrtho || !RI.drawWorld || RI.onlyClientDraw || !cl.worldmodel )
|
|
return;
|
|
|
|
// NOTE: we already has initial params at this point like vieworg, viewangles
|
|
// all other will be sets into R_SetupFrustum
|
|
R_FindViewLeaf ();
|
|
|
|
// player is outside world. Don't update mirrors for speedup reasons
|
|
if(( RI.viewleaf - cl.worldmodel->leafs - 1 ) == -1 )
|
|
return;
|
|
|
|
R_SetupFrustum ();
|
|
R_MarkLeaves ();
|
|
|
|
VectorCopy( RI.cullorigin, tr.modelorg );
|
|
RI.currententity = clgame.entities;
|
|
RI.currentmodel = RI.currententity->model;
|
|
|
|
R_RecursiveMirrorNode( cl.worldmodel->nodes, RI.frustum.clipFlags );
|
|
|
|
R_CheckEntitiesOnList();
|
|
} |