Function SetupObjectLightmapMemory

Descent3/object_lighting.cpp:516–568

Sets up the memory to be used by an object for lightmaps

// Sets up the memory to be used by an object for lightmaps
void SetupObjectLightmapMemory(object *obj) {
  int Mnum, Fnum;
  lightmap_object_face *lof;

  ASSERT(obj->lm_object.used == 0);
  obj->lm_object.used = 1;

  poly_model *pm = &Poly_models[obj->rtype.pobj_info.model_num];
  ASSERT(pm->new_style);

  obj->lm_object.num_models = pm->n_models;

  ASSERT(pm->n_models < MAX_SUBOBJECTS);
  int uv2size = 0;

  mprintf(1, "SETUP %d %s", obj->handle, obj->name);
  for (Mnum = 0; Mnum < pm->n_models; Mnum++) {
    if (IsNonRenderableSubmodel(pm, Mnum)) {
      obj->lm_object.num_faces[Mnum] = 0;
      obj->lm_object.lightmap_faces[Mnum] = NULL;
      continue;
    }

    obj->lm_object.num_faces[Mnum] = pm->submodel[Mnum].num_faces;
    obj->lm_object.lightmap_faces[Mnum] =
        (lightmap_object_face *)mem_malloc(obj->lm_object.num_faces[Mnum] * sizeof(lightmap_object_face));
    ASSERT(obj->lm_object.lightmap_faces[Mnum]);

    for (Fnum = 0; Fnum < pm->submodel[Mnum].num_faces; Fnum++) {
      lof = &obj->lm_object.lightmap_faces[Mnum][Fnum];

      lof->num_verts = pm->submodel[Mnum].faces[Fnum].nverts;
      lof->lmi_handle = BAD_LMI_INDEX;

      uv2size += lof->num_verts;
    }
  }
  if (uv2size) {
    float *uvblock = (float *)mem_malloc(2 * uv2size * sizeof(float));
    mprintf(1, " %X %d\n", uvblock, uv2size);

    for (Mnum = 0; Mnum < pm->n_models; Mnum++) {
      if (!IsNonRenderableSubmodel(pm, Mnum)) {
        for (Fnum = 0; Fnum < pm->submodel[Mnum].num_faces; Fnum++) {
          obj->lm_object.lightmap_faces[Mnum][Fnum].u2 = uvblock;
          uvblock += pm->submodel[Mnum].faces[Fnum].nverts;
          obj->lm_object.lightmap_faces[Mnum][Fnum].v2 = uvblock;
          uvblock += pm->submodel[Mnum].faces[Fnum].nverts;
        }
      }
    }
  }
}

// SHOULDN'T THE FOLLOWING TWO FUNCTIONS REALLY BE IN OBJECT.CPP?
#include "hlsoundlib.h"