+extern int R_Shadow_GetRTLightInfo(unsigned int lightindex, float *origin, float *radius, float *color);
+extern cvar_t r_shadow_lightattenuationdividebias;
+extern cvar_t r_shadow_lightattenuationlinearscale;
+
+static void Mod_GenerateLightmaps_LightPoint(dp_model_t *model, const vec3_t pos, vec3_t ambient, vec3_t diffuse, vec3_t lightdir)
+{
+ int i;
+ int index;
+ int result;
+ float relativepoint[3];
+ float color[3];
+ float dir[3];
+ float dist;
+ float dist2;
+ float intensity;
+ float sample[5*3];
+ float lightorigin[3];
+ float lightradius;
+ float lightradius2;
+ float lightiradius;
+ float lightcolor[3];
+ trace_t trace;
+ for (i = 0;i < 5*3;i++)
+ sample[i] = 0.0f;
+ for (index = 0;;index++)
+ {
+ result = R_Shadow_GetRTLightInfo(index, lightorigin, &lightradius, lightcolor);
+ if (result < 0)
+ break;
+ if (result == 0)
+ continue;
+ lightradius2 = lightradius * lightradius;
+ VectorSubtract(lightorigin, pos, relativepoint);
+ dist2 = VectorLength2(relativepoint);
+ if (dist2 >= lightradius2)
+ continue;
+ lightiradius = 1.0f / lightradius;
+ dist = sqrt(dist2) * lightiradius;
+ intensity = (1.0f - dist) * r_shadow_lightattenuationlinearscale.value / (r_shadow_lightattenuationdividebias.value + dist*dist);
+ if (intensity <= 0.0f)
+ continue;
+ if (model && model->TraceLine)
+ {
+ model->TraceLine(model, NULL, NULL, &trace, pos, lightorigin, SUPERCONTENTS_VISBLOCKERMASK);
+ if (trace.fraction < 1)
+ continue;
+ }
+ // scale down intensity to add to both ambient and diffuse
+ //intensity *= 0.5f;
+ VectorNormalize(relativepoint);
+ VectorScale(lightcolor, intensity, color);
+ VectorMA(sample , 0.5f , color, sample );
+ VectorMA(sample + 3, relativepoint[0], color, sample + 3);
+ VectorMA(sample + 6, relativepoint[1], color, sample + 6);
+ VectorMA(sample + 9, relativepoint[2], color, sample + 9);
+ // calculate a weighted average light direction as well
+ intensity *= VectorLength(color);
+ VectorMA(sample + 12, intensity, relativepoint, sample + 12);
+ }
+ // calculate the direction we'll use to reduce the sample to a directional light source
+ VectorCopy(sample + 12, dir);
+ //VectorSet(dir, sample[3] + sample[4] + sample[5], sample[6] + sample[7] + sample[8], sample[9] + sample[10] + sample[11]);
+ VectorNormalize(dir);
+ // extract the diffuse color along the chosen direction and scale it
+ diffuse[0] = (dir[0]*sample[3] + dir[1]*sample[6] + dir[2]*sample[ 9] + sample[ 0]);
+ diffuse[1] = (dir[0]*sample[4] + dir[1]*sample[7] + dir[2]*sample[10] + sample[ 1]);
+ diffuse[2] = (dir[0]*sample[5] + dir[1]*sample[8] + dir[2]*sample[11] + sample[ 2]);
+ // subtract some of diffuse from ambient
+ VectorMA(sample, -0.333f, diffuse, ambient);
+ // store the normalized lightdir
+ VectorCopy(dir, lightdir);
+}
+