olegpz
/
ericw-tools
mirror of https://github.com/ericwa/ericw-tools.git
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

light: refactor box filtering code a bit

This commit is contained in:
Eric Wasylishen 2017-02-07 20:51:57 -07:00
parent ea39ce6576
commit 4da0a70ab6
1 changed files with 14 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
light/ltface.cc
View File

@ -2311,6 +2311,8 @@ WriteLightmaps(const bsp2_t *bsp, bsp2_dface_t *face, facesup_t *facesup, const
const int actual_width = lightsurf->texsize[0] + 1;
const int actual_height = lightsurf->texsize[1] + 1;
const int oversampled_width = (lightsurf->texsize[0] + 1) * oversample;
for (int mapnum = 0; mapnum < numstyles; mapnum++) {
// allocate new float buffers for the output colors and directions
@ -2327,21 +2329,29 @@ WriteLightmaps(const bsp2_t *bsp, bsp2_dface_t *face, facesup_t *facesup, const
VectorCopy(vec3_origin, color);
VectorCopy(vec3_origin, direction);
float totalWeight = 0.0f;
for (int i = 0; i < oversample; i++) {
for (int j = 0; j < oversample; j++) {
const int col = (s*oversample) + j;
const int row = (t*oversample) + i;
const int oversampled_width = (lightsurf->texsize[0] + 1) * oversample;
const int sample_index = (row * oversampled_width) + col;
const lightsample_t *sample = &sorted.at(mapnum)->samples[sample_index];
VectorAdd(color, sample->color, color);
VectorAdd(direction, sample->direction, direction);
float weight = 1.0f; // box filter
VectorMA(color, weight, sample->color, color);
VectorMA(direction, weight, sample->direction, direction);
totalWeight += weight;
}
}
VectorScale(color, 1.0 / oversample / oversample, color);
VectorScale(color, 1.0 / totalWeight, color);
VectorScale(direction, 1.0 / totalWeight, direction);
// save in the temporary float buffers
const int actual_sampleindex = (t * actual_width) + s;