COverlayMgr::Surf_CreateFragments

/* COverlayMgr::Surf_CreateFragments(moverlay_t*, msurface2_t*) */

void __thiscall
COverlayMgr::Surf_CreateFragments(COverlayMgr *this,moverlay_t *param_1,msurface2_t *param_2)

{
  float *pfVar1;
  msurface2_t mVar2;
  int iVar3;
  char cVar4;
  undefined4 *puVar5;
  int iVar6;
  int iVar7;
  int iVar8;
  float fVar9;
  float fVar10;
  float fVar11;
  float fVar12;
  float fVar13;
  float fVar14;
  float fVar15;
  moverlayfragment_t local_6c [16];
  undefined4 local_5c;
  undefined4 local_58;
  undefined4 local_54;
  undefined4 local_50;
  undefined4 local_4c;
  moverlayfragment_t local_44 [16];
  float *local_34;
  undefined4 local_30;
  undefined4 local_2c;
  undefined4 local_28;
  float *local_24;
  
  local_5c = 0;
  local_58 = 0;
  local_54 = 0;
  local_4c = 0;
  local_34 = (float *)0x0;
  iVar3 = *(int *)(param_2 + 8);
  local_30 = 0;
  local_2c = 0;
  mVar2 = param_2[3];
  local_24 = (float *)0x0;
  if (0x2ffffff < *(uint *)param_2) {
    iVar7 = 0;
    iVar8 = iVar3 * 2;
    while( true ) {
      iVar8 = iVar8 + 2;
      local_50 = 0;
      local_28 = 0;
      CUtlVector<overlayvert_t,CUtlMemory<overlayvert_t,int>>::GrowVector
                ((CUtlVector<overlayvert_t,CUtlMemory<overlayvert_t,int>> *)&local_34,3);
                    /* try { // try from 001d33da to 001d35fb has its CatchHandler @ 001d3658 */
      CUtlVector<overlayvert_t,CUtlMemory<overlayvert_t,int>>::ShiftElementsRight
                ((CUtlVector<overlayvert_t,CUtlMemory<overlayvert_t,int>> *)&local_34,0,3);
      iVar6 = 0;
      do {
        puVar5 = (undefined4 *)((int)local_34 + iVar6);
        if (puVar5 != (undefined4 *)0x0) {
          *puVar5 = 0;
          puVar5[1] = 0;
          puVar5[2] = 0;
          puVar5[3] = 0;
          puVar5[4] = 0;
          puVar5[5] = 0;
          puVar5[6] = 0;
          puVar5[7] = 0;
          puVar5[8] = 0;
          puVar5[9] = 0;
          puVar5[0xb] = 0;
          puVar5[10] = 0;
          puVar5[0xc] = 0xffffffff;
        }
        iVar6 = iVar6 + 0x34;
      } while (iVar6 != 0x9c);
      pfVar1 = (float *)(*(int *)(DAT_003a172c + 0x20) +
                        (uint)*(ushort *)(*(int *)(DAT_003a172c + 0x88) + iVar3 * 2) * 0xc);
      *local_34 = *pfVar1;
      local_34[1] = pfVar1[1];
      iVar6 = DAT_003a172c;
      local_34[2] = pfVar1[2];
      pfVar1 = (float *)(*(int *)(iVar6 + 0x20) +
                        (uint)*(ushort *)(*(int *)(iVar6 + 0x88) + iVar8) * 0xc);
      fVar10 = *pfVar1;
      local_34[0xd] = fVar10;
      fVar9 = pfVar1[1];
      local_34[0xe] = fVar9;
      fVar9 = fVar9 - local_34[1];
      fVar11 = pfVar1[2];
      fVar10 = fVar10 - *local_34;
      local_34[0xf] = fVar11;
      pfVar1 = (float *)(*(int *)(iVar6 + 0x20) +
                        (uint)*(ushort *)(*(int *)(iVar6 + 0x88) + 2 + iVar8) * 0xc);
      fVar15 = *pfVar1;
      local_34[0x1a] = fVar15;
      fVar15 = fVar15 - *local_34;
      fVar14 = pfVar1[1];
      local_34[0x1b] = fVar14;
      fVar14 = fVar14 - local_34[1];
      fVar13 = pfVar1[2];
      local_34[0x1c] = fVar13;
      fVar13 = fVar13 - local_34[2];
      fVar11 = fVar11 - local_34[2];
      fVar12 = fVar11 * fVar15 - fVar13 * fVar10;
      fVar15 = fVar14 * fVar10 - fVar15 * fVar9;
      fVar10 = fVar13 * fVar9 - fVar14 * fVar11;
      if (1.0 < SQRT(fVar12 * fVar12 + fVar15 * fVar15 + fVar10 * fVar10) * 0.5) {
        cVar4 = Surf_PreClipFragment(this,param_1,local_6c,param_2,local_44);
        if (cVar4 != '\0') {
          Surf_ClipFragment(this,param_1,local_6c,param_2,local_44);
        }
      }
      if (iVar7 + 1 == (byte)mVar2 - 2) break;
      iVar7 = iVar7 + 1;
    }
  }
  local_50 = 0;
  local_28 = 0;
  CUtlMemory<overlayvert_t,int>::Purge((CUtlMemory<overlayvert_t,int> *)&local_34);
  local_24 = local_34;
  CUtlMemory<overlayvert_t,int>::Purge((CUtlMemory<overlayvert_t,int> *)&local_34);
  local_50 = 0;
  CUtlMemory<overlayvert_t,int>::Purge((CUtlMemory<overlayvert_t,int> *)&local_5c);
  local_4c = local_5c;
  CUtlMemory<overlayvert_t,int>::Purge((CUtlMemory<overlayvert_t,int> *)&local_5c);
  return;
}