typedef struct csr_filter csr_filter;
struct csr_frag
-{
- u32 id; // Triangle index
- float depth; // 'depth testing'
-
+{
v3f co;
v3f nrm;
+
+ float depth;
};
struct csr_target
{
csr_frag *fragments;
+
u32 x, y;
boxf bounds;
float scale;
+
+ v2f subsamples[ 16 ];
+ int num_samples;
};
struct csr_filter
{
rt->x = x;
rt->y = y;
- rt->fragments = (csr_frag *)csr_malloc( x*y*sizeof(csr_frag) );
+ rt->num_samples = 4;
+
+ rt->fragments = (csr_frag *)csr_malloc( x*y*sizeof(csr_frag)*rt->num_samples );
+
v3_fill( rt->bounds[0], INFINITY );
v3_fill( rt->bounds[1], -INFINITY );
}
+void csr_update_subsamples( csr_target *rt )
+{
+ float range_x = (rt->bounds[1][0]-rt->bounds[0][0]);
+ float range_y = (rt->bounds[1][1]-rt->bounds[0][1]);
+
+ v2f pixel_size = { range_x/(float)rt->x, range_y/(float)rt->y };
+
+ rt->subsamples[0][0] = pixel_size[0] * -0.25f;
+ rt->subsamples[0][1] = 0.f;
+ rt->subsamples[1][0] = pixel_size[0] * 0.75f;
+ rt->subsamples[1][1] = pixel_size[1] * 0.25f;
+ rt->subsamples[2][0] = 0.f;
+ rt->subsamples[2][1] = pixel_size[1] * 0.5f;
+ rt->subsamples[3][0] = pixel_size[0] * 0.5f;
+ rt->subsamples[3][1] = pixel_size[1] * 0.75f;
+}
+
void csr_rt_free( csr_target *rt )
{
free( rt->fragments );
void csr_rt_clear( csr_target *rt )
{
- for( u32 i = 0; i < rt->x*rt->y; i ++ )
+ for( u32 i = 0; i < rt->x*rt->y*rt->num_samples; i ++ )
{
- rt->fragments[ i ].depth = 0.f;
+ v3_zero( rt->fragments[ i ].co );
+ v3_zero( rt->fragments[ i ].nrm );
+ rt->fragments[i].depth = 0.f;
}
}
rt->bounds[1][1] = cy + d + padding;
rt->scale = d + padding;
+
+ csr_update_subsamples( rt );
}
-void simple_raster( csr_target *rt, vmf_vert tri[3], int id )
+void csr_write_txt( char const *path, const char *name, csr_target *rt )
{
- // Very simplified tracing algorithm
- float tqa = 0.f, tqb = 0.f;
+ FILE *write_ptr;
+
+ write_ptr = fopen( path, "w" );
+ fprintf( write_ptr, "\"%s\"\n\{\n", name );
+ fprintf( write_ptr, "\t\"material\" \"overviews/%s\"\n", name );
+ fprintf( write_ptr, "\t\"pos_x\" \"%.8f\"\n", rt->bounds[0][0] );
+ fprintf( write_ptr, "\t\"pos_y\" \"%.8f\"\n", rt->bounds[0][1] );
+ fprintf( write_ptr, "\t\"scale\" \"%.8f\"\n", rt->scale / (float)rt->x );
+ fprintf( write_ptr, "}\n" );
+
+ fclose( write_ptr );
+}
+
+void simple_raster( csr_target *rt, vmf_vert tri[3] )
+{
+ // Very very simplified rasterizing algorithm
v2f bmin = { 0.f, 0.f };
v2f bmax = { rt->x, rt->y };
float range_x = (rt->bounds[1][0]-rt->bounds[0][0])/(float)rt->x;
float range_y = (rt->bounds[1][1]-rt->bounds[0][1])/(float)rt->y;
- int start_x = csr_min( rt->x-1, csr_max( 0, floorf( (bmin[0]-rt->bounds[0][0])/range_x)));
- int end_x = csr_max( 0, csr_min( rt->x-1, floorf( (bmax[0]-rt->bounds[0][0])/range_x )));
- int start_y = csr_min( rt->y-1, csr_max( 0, ceilf( (bmin[1]-rt->bounds[0][1])/range_y )));
- int end_y = csr_max( 0, csr_min( rt->y-1, ceilf( (bmax[1]-rt->bounds[0][1])/range_y )));
+ int start_x = csr_min( rt->x-1, csr_max( 0, floorf( (bmin[0]-rt->bounds[0][0])/range_x)));
+ int end_x = csr_max( 0, csr_min( rt->x-1, ceilf( (bmax[0]-rt->bounds[0][0])/range_x)));
+ int start_y = csr_min( rt->y-1, csr_max( 0, floorf( (bmin[1]-rt->bounds[0][1])/range_y)));
+ int end_y = csr_max( 0, csr_min( rt->y-1, ceilf( (bmax[1]-rt->bounds[0][1])/range_y)));
+
+ v2f v0, v1, v2, vp;
+ float d, bca = 0.f, bcb = 0.f, bcc = 0.f;
- v3f trace_dir = { 0.f, 0.f, 1.f };
- v3f trace_origin = { 0.f, 0.f, -16385.f };
+ v2_sub( tri[1].co, tri[0].co, v0 );
+ v2_sub( tri[2].co, tri[0].co, v1 );
+ v2_sub( tri[1].co, tri[2].co, v2 );
+ d = 1.f / (v0[0]*v1[1] - v1[0]*v0[1]);
+
+ // Backface culling
+ if( v2_cross( v0, v1 ) > 0.f )
+ return;
+
+ v2f trace_origin;
for( u32 py = start_y; py <= end_y; py ++ )
{
for( u32 px = start_x; px <= end_x; px ++ )
{
- csr_frag *frag = &rt->fragments[ py * rt->y + px ];
+ csr_frag *frag = &rt->fragments[ (py * rt->y + px) * rt->num_samples ];
trace_origin[0] = csr_lerpf( rt->bounds[0][0], rt->bounds[1][0], (float)px/(float)rt->x );
- float tdepth = csr_ray_tri( trace_origin, trace_dir, tri[0].co, tri[1].co, tri[2].co, &tqa, &tqb );
- if( tdepth > frag->depth )
+ // Determine coverage
+ for( int i = 0; i < rt->num_samples; i ++ )
{
- frag->depth = tdepth;
+ v3f sample_origin;
- v3_muls( tri[1].co, tqa, frag->co );
- v3_muladds( frag->co, tri[2].co, tqb, frag->co );
- v3_muladds( frag->co, tri[0].co, 1.f - tqa - tqb, frag->co );
+ v2_add( rt->subsamples[ i ], trace_origin, sample_origin );
+ v2_sub( sample_origin, tri[0].co, vp );
+
+ if( v2_cross( v0, vp ) > 0.f )
+ continue;
+ if( v2_cross( vp, v1 ) > 0.f )
+ continue;
+
+ v2f vp2;
+ v2_sub( sample_origin, tri[2].co, vp2 );
+
+ if( v2_cross( vp2, v2 ) > 0.f )
+ continue;
+
+ bcb = (vp[0]*v1[1] - v1[0]*vp[1]) * d;
+ bcc = (v0[0]*vp[1] - vp[0]*v0[1]) * d;
+ bca = 1.f - bcb - bcc;
+
+ float hit = (tri[0].co[2] * bca + tri[1].co[2] * bcb + tri[2].co[2] * bcc) +16385.f;
+
+ if( hit > frag[i].depth )
+ {
+ frag[i].depth = hit;
+ v3_muls( tri[0].co, bca, frag[i].co );
+ v3_muladds( frag[i].co, tri[1].co, bcb, frag[i].co );
+ v3_muladds( frag[i].co, tri[2].co, bcc, frag[i].co );
+
+ // TODO: Same for normal map
+ }
}
}
}
m3x3_mulv( normal, triangle[1].nrm, new_tri[1].nrm );
m3x3_mulv( normal, triangle[2].nrm, new_tri[2].nrm );
- simple_raster( rt, new_tri, 0 );
+ simple_raster( rt, new_tri );
}
}
m4x3_transform_aabb( model, trf_bounds );
// Join
- //box_concat( rt->bounds, trf_bounds );
+ box_concat( rt->bounds, trf_bounds );
}
else
{
solidgen_ctx_reset( &solid );
solidgen_ctx_free( &solid );
+}
+
+void csr_rt_save_buffers( csr_target *rt, const char *basename, const char *subname )
+{
+ char output[ 512 ];
+
+ float *image = (float *)csr_malloc( 1024*1024*sizeof(float)*3 );
+
+ for( int l = 0; l < rt->x; l ++ )
+ {
+ for( int x = 0; x < rt->y; x ++ )
+ {
+ float *dst = &image[ (l*1024+x)*3 ];
+ csr_frag *src = &rt->fragments[ ((1023-l)*1024+x)*rt->num_samples ];
+
+ v3_zero( dst );
+ v3_muls( src[0].co, 1.f/(float)rt->num_samples, dst );
+ v3_muladds( dst, src[1].co, 1.f/(float)rt->num_samples, dst );
+ v3_muladds( dst, src[2].co, 1.f/(float)rt->num_samples, dst );
+ v3_muladds( dst, src[3].co, 1.f/(float)rt->num_samples, dst );
+ }
+ }
+
+ // Save position buffer
+ strcpy( output, basename );
+ strcat( output, "." );
+ strcat( output, subname );
+ strcat( output, "_position.pfm" );
+ csr_32f_write( output, rt->x, rt->y, image );
- printf( "Bounds resolved to: (%.3f, %.3f, %.3f) -> (%.3f, %.3f, %.3f)\n",
- rt->bounds[0][0],rt->bounds[0][1],rt->bounds[0][2],
- rt->bounds[1][0],rt->bounds[1][1],rt->bounds[1][2] );
+ free( image );
}
projects / csRadar.git / blobdiff