#include "THISDUST.H"
#include "OBJCOLL.H"


// decompiled code
// original method signature: 
// char /*$ra*/ CellEmpty(struct VECTOR *pPosition /*$s1*/, int radius /*$s2*/)
 // line 63, offset 0x00069ba4
	/* begin block 1 */
		// Start line: 64
		// Start offset: 0x00069BA4
		// Variables:
	// 		struct CELL_ITERATOR ci; // stack offset -48
	// 		int cell_x; // $a0
	// 		struct CELL_OBJECT *pCellObject; // $a2
	// 		struct MODEL *pModel; // $a3

		/* begin block 1.1 */
			// Start line: 100
			// Start offset: 0x00069C60
			// Variables:
		// 		int sphere_sq; // $v0
		// 		int xd; // $t5
		// 		int zd; // $t4

			/* begin block 1.1.1 */
				// Start line: 114
				// Start offset: 0x00069CC4
				// Variables:
			// 		int box_loop; // $t3
			// 		int num_cb; // $t6
			// 		struct COLLISION_PACKET *collide; // $t0

				/* begin block 1.1.1.1 */
					// Start line: 119
					// Start offset: 0x00069CE8
					// Variables:
				// 		unsigned int zs; // $t2
				// 		unsigned int xs; // $t1
				// 		int cs; // $a2
				// 		int sn; // $a0
				/* end block 1.1.1.1 */
				// End offset: 0x00069DC8
				// End Line: 138
			/* end block 1.1.1 */
			// End offset: 0x00069DD8
			// End Line: 139
		/* end block 1.1 */
		// End offset: 0x00069DD8
		// End Line: 141
	/* end block 1 */
	// End offset: 0x00069E1C
	// End Line: 153

	/* begin block 2 */
		// Start line: 126
	/* end block 2 */
	// End Line: 127

char CellEmpty(VECTOR *pPosition,int radius)

{
  PACKED_CELL_OBJECT *ppco;
  CELL_OBJECT *pCVar1;
  int iVar2;
  int iVar3;
  uint uVar4;
  int iVar5;
  int *piVar6;
  int iVar7;
  int iVar8;
  int *piVar9;
  int iVar10;
  int iVar11;
  int iVar12;
  CELL_ITERATOR CStack48;
  
  iVar3 = pPosition->vx + units_across_halved;
  if (iVar3 < 0) {
    iVar3 = iVar3 + 0x7ff;
  }
  iVar2 = pPosition->vz + units_down_halved;
  if (iVar2 < 0) {
    iVar2 = iVar2 + 0x7ff;
  }
  ppco = GetFirstPackedCop(iVar3 >> 0xb,iVar2 >> 0xb,&CStack48,0);
  pCVar1 = UnpackCellObject(ppco,&CStack48.nearCell);
  do {
    if (pCVar1 == (CELL_OBJECT *)0x0) {
      return '\x01';
    }
    piVar6 = (int *)modelpointers1536[pCVar1->type]->collision_block;
    if (piVar6 != (int *)0x0) {
      iVar12 = (int)(((uint)*(ushort *)&(pCVar1->pos).vx - (uint)*(ushort *)&pPosition->vx) *
                    0x10000) >> 0x10;
      iVar2 = (int)(((uint)*(ushort *)&(pCVar1->pos).vz - (uint)*(ushort *)&pPosition->vz) * 0x10000
                   ) >> 0x10;
      iVar3 = (int)modelpointers1536[pCVar1->type]->bounding_sphere + 0x244;
      piVar9 = piVar6 + 1;
      if (iVar12 * iVar12 + iVar2 * iVar2 < iVar3 * iVar3) {
        iVar3 = 0;
        if (0 < *piVar6) {
          do {
            iVar11 = (int)*(short *)((int)piVar9 + 0x12) * 0x800 + radius * 0x1000;
            iVar10 = (int)*(short *)((int)piVar9 + 0xe) * 0x800 + radius * 0x1000;
            uVar4 = ((uint)pCVar1->yang + (int)*(short *)((int)piVar9 + 10)) * 0x100 & 0x3f00;
            iVar7 = pPosition->vy +
                    ((int)(((uint)*(ushort *)&(pCVar1->pos).vy + (uint)*(ushort *)(piVar9 + 1)) *
                          0x10000) >> 0x10) + 0x50;
            if (iVar7 < 0) {
              iVar7 = -iVar7;
            }
            iVar8 = (int)*(short *)((int)rcossin_tbl + uVar4 + 2);
            iVar5 = (int)*(short *)((int)rcossin_tbl + uVar4);
            if (((iVar7 < (((int)((uint)*(ushort *)(piVar9 + 4) << 0x10) >> 0x10) -
                           ((int)((uint)*(ushort *)(piVar9 + 4) << 0x10) >> 0x1f) >> 1) + 0x3c) &&
                ((uint)((iVar12 * iVar8 - iVar2 * iVar5) + iVar10) < (uint)(iVar10 * 2))) &&
               ((uint)(iVar2 * iVar8 + iVar12 * iVar5 + iVar11) < (uint)(iVar11 * 2))) {
              return '\0';
            }
            iVar3 = iVar3 + 1;
            piVar9 = piVar9 + 5;
          } while (iVar3 < *piVar6);
        }
      }
    }
    ppco = GetNextPackedCop(&CStack48);
    pCVar1 = UnpackCellObject(ppco,&CStack48.nearCell);
  } while( true );
}



// decompiled code
// original method signature: 
// int /*$ra*/ GlobalPositionToCellNumber(struct VECTOR *pPosition /*$a0*/)
 // line 155, offset 0x0006b2ec
	/* begin block 1 */
		// Start line: 156
		// Start offset: 0x0006B2EC
		// Variables:
	// 		int cellX; // $a3
	// 		int cellZ; // $a1
	// 		int cbrX; // $t1
	// 		int cbrZ; // $t0
	// 		int cbr; // $t2
	// 		int xOff; // $a3
	// 		int yOff; // $a0
	/* end block 1 */
	// End offset: 0x0006B3E4
	// End Line: 175

	/* begin block 2 */
		// Start line: 1770
	/* end block 2 */
	// End Line: 1771

	/* begin block 3 */
		// Start line: 310
	/* end block 3 */
	// End Line: 311

	/* begin block 4 */
		// Start line: 1773
	/* end block 4 */
	// End Line: 1774

int GlobalPositionToCellNumber(VECTOR *pPosition)

{
  int iVar1;
  int iVar2;
  int iVar3;
  uint uVar4;
  uint uVar5;
  int iVar6;
  
  iVar1 = pPosition->vx + units_across_halved;
  iVar3 = iVar1 + -0x400;
  if (iVar3 < 0) {
    iVar3 = iVar1 + 0x3ff;
  }
  iVar1 = pPosition->vz + units_down_halved;
  iVar2 = iVar1 + -0x400;
  iVar3 = iVar3 >> 0xb;
  if (iVar2 < 0) {
    iVar2 = iVar1 + 0x3ff;
  }
  iVar2 = iVar2 >> 0xb;
  iVar1 = iVar3;
  if (iVar3 < 0) {
    iVar1 = iVar3 + 0x1f;
  }
  uVar5 = iVar1 >> 5;
  iVar1 = iVar2;
  if (iVar2 < 0) {
    iVar1 = iVar2 + 0x1f;
  }
  uVar4 = iVar1 >> 5;
  iVar6 = (uVar5 & 1) + (uVar4 & 1) * 2;
  iVar1 = cells_across;
  if (cells_across < 0) {
    iVar1 = cells_across + 0x1f;
  }
  if (RoadMapRegions[iVar6] != uVar5 + uVar4 * (iVar1 >> 5)) {
    return -1;
  }
  return (uint)cell_ptrs[(iVar2 + uVar4 * -0x20) * 0x20 + iVar6 * 0x400 + iVar3 + uVar5 * -0x20];
}



// decompiled code
// original method signature: 
// char /*$ra*/ CellAtPositionEmpty(struct VECTOR *pPosition /*$s0*/, int radius /*$s1*/)
 // line 183, offset 0x0006b3e4
	/* begin block 1 */
		// Start line: 184
		// Start offset: 0x0006B3E4
	/* end block 1 */
	// End offset: 0x0006B430
	// End Line: 205

	/* begin block 2 */
		// Start line: 1826
	/* end block 2 */
	// End Line: 1827

	/* begin block 3 */
		// Start line: 1835
	/* end block 3 */
	// End Line: 1836

char CellAtPositionEmpty(VECTOR *pPosition,int radius)

{
  char cVar1;
  int iVar2;
  
  iVar2 = GlobalPositionToCellNumber(pPosition);
  if (iVar2 == -1) {
    cVar1 = '\x01';
  }
  else {
    cVar1 = CellEmpty(pPosition,radius);
  }
  return cVar1;
}



// decompiled code
// original method signature: 
// int /*$ra*/ RaySlabsIntersection(struct tRay *ray /*$t5*/, struct tAABB *bbox /*$t4*/)
 // line 217, offset 0x00069e1c
	/* begin block 1 */
		// Start line: 218
		// Start offset: 0x00069E1C
		// Variables:
	// 		int i; // $t1
	// 		struct tRange inside; // stack offset -24

		/* begin block 1.1 */
			// Start line: 226
			// Start offset: 0x00069E40
			// Variables:
		// 		struct tRange cabbage; // stack offset -16
		// 		struct tRange scaledCabbage; // stack offset -8
		// 		int dir; // $a2
		/* end block 1.1 */
		// End offset: 0x00069F94
		// End Line: 253
	/* end block 1 */
	// End offset: 0x00069FB4
	// End Line: 255

	/* begin block 2 */
		// Start line: 435
	/* end block 2 */
	// End Line: 436

	/* begin block 3 */
		// Start line: 500
	/* end block 3 */
	// End Line: 501

	/* begin block 4 */
		// Start line: 506
	/* end block 4 */
	// End Line: 507

int RaySlabsIntersection(tRay *ray,tAABB *bbox)

{
  int iVar1;
  int iVar2;
  int iVar3;
  uint uVar4;
  int iVar5;
  tAABB *ptVar6;
  tRay *ptVar7;
  int local_18;
  int local_14;
  int local_8;
  int local_4;
  
  iVar5 = 0;
  local_18 = 0;
  local_14 = 0x1000;
  ptVar6 = bbox;
  ptVar7 = ray;
  do {
    uVar4 = 0xffffffff;
    iVar3 = ptVar6->slab[0].lower - ptVar7->org[0];
    iVar2 = ray->dir[iVar5];
    iVar1 = bbox->slab[iVar5].upper - ptVar7->org[0];
    if (-1 < iVar2) {
      uVar4 = (uint)(iVar2 != 0);
    }
    if (uVar4 == 0) {
      if (0 < iVar3) {
        return 0;
      }
      if (iVar1 < 0) {
        return 0;
      }
      local_4 = 0x3000;
      local_8 = -0x3000;
    }
    else {
      if ((int)uVar4 < 1) {
        if (uVar4 == 0xffffffff) {
          local_4 = (iVar3 * 0x1000) / iVar2;
          if (iVar2 == 0) {
            trap(7);
          }
          local_8 = (iVar1 * 0x1000) / iVar2;
          if (iVar2 == 0) {
            trap(7);
          }
        }
      }
      else {
        if (uVar4 == 1) {
          local_8 = (iVar3 * 0x1000) / iVar2;
          if (iVar2 == 0) {
            trap(7);
          }
          local_4 = (iVar1 * 0x1000) / iVar2;
          if (iVar2 == 0) {
            trap(7);
          }
        }
      }
    }
    if (local_18 < local_8) {
      local_18 = local_8;
    }
    if (local_4 < local_14) {
      local_14 = local_4;
    }
    if (local_14 < local_18) {
      return 0;
    }
    ptVar7 = (tRay *)(ptVar7->org + 1);
    iVar5 = iVar5 + 1;
    ptVar6 = (tAABB *)(ptVar6->slab + 1);
    if (2 < iVar5) {
      return 1;
    }
  } while( true );
}



// decompiled code
// original method signature: 
// char /*$ra*/ lineClear(struct VECTOR *v1 /*stack 0*/, struct VECTOR *v2 /*stack 4*/)
 // line 259, offset 0x00069fb4
	/* begin block 1 */
		// Start line: 260
		// Start offset: 0x00069FB4
		// Variables:
	// 		int we; // stack offset -56
	// 		int ocx; // $t2
	// 		int ocz; // $t3
	// 		struct VECTOR pos; // stack offset -184
	// 		struct VECTOR va; // stack offset -168
	// 		struct VECTOR vb; // stack offset -152

		/* begin block 1.1 */
			// Start line: 279
			// Start offset: 0x0006A074
			// Variables:
		// 		int cell_x; // $fp
		// 		int cell_z; // $s7
		// 		struct CELL_ITERATOR ci; // stack offset -136
		// 		struct CELL_OBJECT *pCellObject; // $s4

			/* begin block 1.1.1 */
				// Start line: 299
				// Start offset: 0x0006A134
				// Variables:
			// 		struct MODEL *pModel; // $a1

				/* begin block 1.1.1.1 */
					// Start line: 307
					// Start offset: 0x0006A170
					// Variables:
				// 		int sphere_sq; // $v0
				// 		int xd; // $a0
				// 		int zd; // $v1

					/* begin block 1.1.1.1.1 */
						// Start line: 318
						// Start offset: 0x0006A1D4
						// Variables:
					// 		int box_loop; // $s5
					// 		int num_cb; // $s6
					// 		struct COLLISION_PACKET *collide; // $s3

						/* begin block 1.1.1.1.1.1 */
							// Start line: 323
							// Start offset: 0x0006A1F0
							// Variables:
						// 		struct MATRIX *mat; // $a0
						// 		int cx; // $v1
						// 		int cy; // $a2
						// 		int cz; // $v0
						// 		int cs; // $t1
						// 		int sn; // $t5

							/* begin block 1.1.1.1.1.1.1 */
								// Start line: 323
								// Start offset: 0x0006A1F0
								// Variables:
							// 		struct tRay ray; // stack offset -112
							// 		struct tAABB box; // stack offset -80
							/* end block 1.1.1.1.1.1.1 */
							// End offset: 0x0006A414
							// End Line: 347
						/* end block 1.1.1.1.1.1 */
						// End offset: 0x0006A414
						// End Line: 348
					/* end block 1.1.1.1.1 */
					// End offset: 0x0006A424
					// End Line: 349
				/* end block 1.1.1.1 */
				// End offset: 0x0006A424
				// End Line: 351
			/* end block 1.1.1 */
			// End offset: 0x0006A424
			// End Line: 352
		/* end block 1.1 */
		// End offset: 0x0006A444
		// End Line: 355
	/* end block 1 */
	// End offset: 0x0006A498
	// End Line: 360

	/* begin block 2 */
		// Start line: 633
	/* end block 2 */
	// End Line: 634

	/* begin block 3 */
		// Start line: 638
	/* end block 3 */
	// End Line: 639

	/* begin block 4 */
		// Start line: 654
	/* end block 4 */
	// End Line: 655

char lineClear(VECTOR *v1,VECTOR *v2)

{
  int iVar1;
  VECTOR *pVVar2;
  PACKED_CELL_OBJECT *ppco;
  int iVar3;
  CELL_OBJECT *pCVar4;
  int iVar5;
  int cellz;
  int iVar6;
  int iVar7;
  int cellx;
  int iVar8;
  uint uVar9;
  int iVar10;
  MODEL *pMVar11;
  int iVar12;
  int *piVar13;
  int iVar14;
  uint uVar15;
  int iVar16;
  int iVar17;
  int iVar18;
  int iVar19;
  int iVar20;
  int iVar21;
  int *piVar22;
  CELL_ITERATOR CStack136;
  tRay local_70;
  tAABB local_50;
  int local_38;
  int local_30;
  
  iVar7 = v1->vx;
  iVar10 = v1->vy;
  iVar12 = v1->vz;
  iVar16 = v2->vx;
  local_38 = 0;
  iVar1 = iVar16 - iVar7;
  iVar14 = v2->vy;
  iVar18 = v2->vz;
  iVar5 = iVar18 - iVar12;
  iVar3 = -1;
  iVar6 = -1;
  do {
    if (local_38 == 0) {
      cellx = v2->vx + units_across_halved;
      pVVar2 = v2;
      if (cellx < 0) {
        cellx = cellx + 0x7ff;
      }
    }
    else {
      cellx = v1->vx + units_across_halved;
      pVVar2 = v1;
      if (cellx < 0) {
        cellx = cellx + 0x7ff;
      }
    }
    cellz = pVVar2->vz + units_down_halved;
    cellx = cellx >> 0xb;
    if (cellz < 0) {
      cellz = cellz + 0x7ff;
    }
    cellz = cellz >> 0xb;
    if ((iVar3 != cellx) || (iVar6 != cellz)) {
      ppco = GetFirstPackedCop(cellx,cellz,&CStack136,0);
      while (pCVar4 = UnpackCellObject(ppco,&CStack136.nearCell), pCVar4 != (CELL_OBJECT *)0x0) {
        pMVar11 = modelpointers1536[pCVar4->type];
        piVar13 = (int *)pMVar11->collision_block;
        if (((piVar13 != (int *)0x0) && ((pMVar11->flags2 & 0xa00) == 0)) &&
           (iVar8 = (int)(((uint)*(ushort *)&(pCVar4->pos).vx - ((iVar7 + iVar16) / 2 & 0xffffU)) *
                         0x10000) >> 0x10,
           iVar6 = (int)(((uint)*(ushort *)&(pCVar4->pos).vz - ((iVar12 + iVar18) / 2 & 0xffffU)) *
                        0x10000) >> 0x10, iVar3 = (int)pMVar11->bounding_sphere + 800,
           iVar8 * iVar8 + iVar6 * iVar6 < iVar3 * iVar3)) {
          piVar22 = piVar13 + 1;
          iVar6 = *piVar13;
          iVar3 = 0;
          if (0 < iVar6) {
            local_30 = 0xa3812;
            do {
              uVar9 = -(uint)pCVar4->yang & 0x3f;
              uVar15 = ((uint)pCVar4->yang + (int)*(short *)((int)piVar22 + 10)) * 0x100 & 0x3f00;
              iVar19 = (int)*(short *)(uVar15 + local_30);
              iVar21 = iVar7 - ((pCVar4->pos).vx +
                               ((int)*(short *)((int)piVar22 + 2) * (int)(&matrixtable)[uVar9].m[0]
                                + (int)*(short *)((int)piVar22 + 6) *
                                  (int)(&matrixtable)[uVar9].m[6] + 0x800 >> 0xc));
              iVar20 = (int)*(short *)((int)rcossin_tbl + uVar15);
              iVar17 = iVar12 - ((pCVar4->pos).vz +
                                ((int)*(short *)((int)piVar22 + 2) * (int)(&matrixtable)[uVar9].m[2]
                                 + (int)*(short *)((int)piVar22 + 6) *
                                   (int)(&matrixtable)[uVar9].m[8] + 0x800 >> 0xc));
              iVar8 = (uint)*(ushort *)((int)piVar22 + 0xe) << 0x10;
              local_50.slab[0].upper = ((iVar8 >> 0x10) - (iVar8 >> 0x1f) >> 1) + testRadius;
              local_50.slab[0].lower = -local_50.slab[0].upper;
              local_50.slab[1].upper =
                   (((int)((uint)*(ushort *)(piVar22 + 4) << 0x10) >> 0x10) -
                    ((int)((uint)*(ushort *)(piVar22 + 4) << 0x10) >> 0x1f) >> 1) + testRadius;
              local_50.slab[1].lower = -local_50.slab[1].upper;
              local_70.org[1] =
                   (iVar10 - ((int)((-(uint)*(ushort *)(piVar22 + 1) -
                                    (uint)*(ushort *)&(pCVar4->pos).vy) * 0x10000) >> 0x10)) + 0x50;
              iVar8 = (uint)*(ushort *)((int)piVar22 + 0x12) << 0x10;
              local_50.slab[2].upper = ((iVar8 >> 0x10) - (iVar8 >> 0x1f) >> 1) + testRadius;
              local_50.slab[2].lower = -local_50.slab[2].upper;
              local_70.org[0] = (iVar19 * iVar21 - iVar20 * iVar17) + 0x800 >> 0xc;
              local_70.org[2] = iVar19 * iVar17 + iVar20 * iVar21 + 0x800 >> 0xc;
              local_70.dir[0] = (iVar19 * iVar1 - iVar20 * iVar5) + 0x800 >> 0xc;
              local_70.dir[2] = iVar19 * iVar5 + iVar20 * iVar1 + 0x800 >> 0xc;
              local_70.dir[1] = iVar14 - iVar10;
              iVar8 = RaySlabsIntersection(&local_70,&local_50);
              if (iVar8 != 0) {
                return '\0';
              }
              iVar3 = iVar3 + 1;
              piVar22 = piVar22 + 5;
            } while (iVar3 < iVar6);
          }
        }
        ppco = GetNextPackedCop(&CStack136);
      }
    }
    local_38 = local_38 + 1;
    iVar3 = cellx;
    iVar6 = cellz;
  } while (local_38 < 2);
  return '\x01';
}



// decompiled code
// original method signature: 
// void /*$ra*/ SetCopListCell(int x /*$a0*/, int z /*$a1*/)
 // line 377, offset 0x0006b430
	/* begin block 1 */
		// Start line: 379
		// Start offset: 0x0006B430
		// Variables:
	// 		struct XZPAIR cell; // stack offset -16
	/* end block 1 */
	// End offset: 0x0006B45C
	// End Line: 384

	/* begin block 2 */
		// Start line: 2054
	/* end block 2 */
	// End Line: 2055

	/* begin block 3 */
		// Start line: 2227
	/* end block 3 */
	// End Line: 2228

	/* begin block 4 */
		// Start line: 2228
	/* end block 4 */
	// End Line: 2229

	/* begin block 5 */
		// Start line: 2229
	/* end block 5 */
	// End Line: 2230

void SetCopListCell(int x,int z)

{
  XZPAIR local_10;
  
  local_10.x = x;
  local_10.z = z;
  CollisionCopList(&local_10,(int *)0x0);
  return;
}



// decompiled code
// original method signature: 
// void /*$ra*/ BuildCollisionCopList(int *count /*$a1*/)
 // line 386, offset 0x0006b45c
	/* begin block 1 */
		// Start line: 2245
	/* end block 1 */
	// End Line: 2246

	/* begin block 2 */
		// Start line: 2248
	/* end block 2 */
	// End Line: 2249

void BuildCollisionCopList(int *count)

{
  CollisionCopList((XZPAIR *)0x0,count);
  return;
}



// decompiled code
// original method signature: 
// void /*$ra*/ CollisionCopList(struct XZPAIR *pos /*$a0*/, int *count /*$s0*/)
 // line 391, offset 0x0006a498
	/* begin block 1 */
		// Start line: 392
		// Start offset: 0x0006A498
		// Variables:
	// 		static struct XZPAIR initial; // offset 0x0

		/* begin block 1.1 */
			// Start line: 402
			// Start offset: 0x0006A4E8
			// Variables:
		// 		struct XZPAIR cell; // stack offset -72
		// 		int i; // $a0
		// 		int j; // $t1

			/* begin block 1.1.1 */
				// Start line: 411
				// Start offset: 0x0006A508
				// Variables:
			// 		struct CELL_ITERATOR ci; // stack offset -64
			// 		struct XZPAIR cbr; // stack offset -40
			// 		int barrelRegion; // $v0
			// 		struct CELL_OBJECT *cop; // $a0
			/* end block 1.1.1 */
			// End offset: 0x0006A5F8
			// End Line: 429
		/* end block 1.1 */
		// End offset: 0x0006A628
		// End Line: 431
	/* end block 1 */
	// End offset: 0x0006A64C
	// End Line: 432

	/* begin block 2 */
		// Start line: 1207
	/* end block 2 */
	// End Line: 1208

	/* begin block 3 */
		// Start line: 1239
	/* end block 3 */
	// End Line: 1240

void CollisionCopList(XZPAIR *pos,int *count)

{
  PACKED_CELL_OBJECT *ppco;
  CELL_OBJECT *pCVar1;
  int iVar2;
  int iVar3;
  int iVar4;
  uint local_48;
  uint local_44;
  CELL_ITERATOR CStack64;
  uint local_28;
  uint local_24;
  
  if (pos == (XZPAIR *)0x0) {
    iVar2 = 0;
    local_48 = initial_24;
    do {
      iVar4 = 0;
      iVar2 = iVar2 + 1;
      local_44 = DAT_000ab04c;
      do {
        local_28 = local_48 >> 5;
        local_24 = local_44 >> 5;
        iVar3 = cells_across;
        if (cells_across < 0) {
          iVar3 = cells_across + 0x1f;
        }
        iVar4 = iVar4 + 1;
        if (local_28 + local_24 * (iVar3 >> 5) ==
            RoadMapRegions[(local_28 & 1) + (local_24 & 1) * 2]) {
          ppco = GetFirstPackedCop(local_48,local_44,&CStack64,1);
          pCVar1 = UnpackCellObject(ppco,&CStack64.nearCell);
          while (pCVar1 != (CELL_OBJECT *)0x0) {
            coplist[*count] = pCVar1;
            pCVar1->pad = *(uchar *)count;
            pcoplist[*count] = CStack64.ppco;
            ppco = GetNextPackedCop(&CStack64);
            pCVar1 = UnpackCellObject(ppco,&CStack64.nearCell);
            *count = *count + 1;
          }
        }
        local_44 = local_44 + 1;
      } while (iVar4 < 2);
      local_48 = local_48 + 1;
    } while (iVar2 < 2);
  }
  else {
    initial_24 = pos->x;
    DAT_000ab04c = pos->z;
    ClearCopUsage();
  }
  return;
}



// decompiled code
// original method signature: 
// void /*$ra*/ CheckScenaryCollisions(struct _CAR_DATA *cp /*$s7*/)
 // line 439, offset 0x0006a64c
	/* begin block 1 */
		// Start line: 440
		// Start offset: 0x0006A64C
		// Variables:
	// 		struct MODEL *model; // stack offset -76
	// 		struct CELL_OBJECT *cop; // $s5
	// 		struct VECTOR player_pos; // stack offset -152
	// 		struct COLLISION_PACKET *collide; // $s1
	// 		int cell_x; // $a0
	// 		int xd; // $v1
	// 		int zd; // $a0
	// 		int num_cb; // stack offset -72
	// 		int box_loop; // $s6
	// 		int sphere_sq; // $v0
	// 		int x1; // stack offset -68
	// 		struct BUILDING_BOX bbox; // stack offset -136
	// 		int mdcount; // stack offset -80
	// 		int coll_test_count; // $t0
	// 		struct XZPAIR box; // stack offset -104
	// 		int lbody; // stack offset -64
	// 		int extraDist; // stack offset -60

		/* begin block 1.1 */
			// Start line: 519
			// Start offset: 0x0006A934
			// Variables:
		// 		struct BUILDING_BOX *pbox; // $s4
		// 		struct MATRIX *mat; // $a1
		// 		struct VECTOR offset; // stack offset -96
		/* end block 1.1 */
		// End offset: 0x0006AD48
		// End Line: 591
	/* end block 1 */
	// End offset: 0x0006AD8C
	// End Line: 597

	/* begin block 2 */
		// Start line: 1368
	/* end block 2 */
	// End Line: 1369

	/* begin block 3 */
		// Start line: 1376
	/* end block 3 */
	// End Line: 1377

void CheckScenaryCollisions(_CAR_DATA *cp)

{
  int iVar1;
  int iVar2;
  int iVar3;
  uint uVar4;
  int iVar5;
  int *piVar6;
  int iVar7;
  int iVar8;
  int *piVar9;
  CELL_OBJECT *cop;
  BUILDING_BOX local_88;
  long local_68;
  long local_64;
  int local_60;
  int local_58;
  int local_50;
  MODEL *local_4c;
  int local_48;
  int local_44;
  int local_40;
  int local_3c;
  int local_38;
  int local_30;
  
  if ((cp->controlType == '\x05') && ((cp->ap).carCos == (CAR_COSMETICS *)0x0)) {
    local_40 = 0x168;
  }
  else {
    local_40 = (int)(((cp->ap).carCos)->colBox).vz;
  }
  if (cp < car_data) {
    while (FrameCnt != 0x78654321) {
      trap(0x400);
    }
  }
  if ((ghost_mode == 0) && ((cp->controlType != '\x01' || (playerghost == 0)))) {
    EventCollisions(cp,0);
    local_3c = 0x244;
    iVar5 = (cp->hd).where.t[0];
    iVar7 = (cp->hd).where.t[2];
    boxOverlap = -1;
    local_68 = car_data[0].hd.where.t[0];
    local_64 = car_data[0].hd.where.t[2];
    if (cp->controlType == '\x06') {
      local_3c = 100;
    }
    iVar1 = iVar5 + units_across_halved;
    iVar2 = iVar1 + -0x400;
    if (iVar2 < 0) {
      iVar2 = iVar1 + 0x3ff;
    }
    iVar1 = iVar7 + units_down_halved;
    iVar3 = iVar1 + -0x400;
    if (iVar3 < 0) {
      iVar3 = iVar1 + 0x3ff;
    }
    SetCopListCell(iVar2 >> 0xb,iVar3 >> 0xb);
    local_50 = 0;
    Havana3DOcclusion(0x5c,&local_50);
    local_44 = 0;
    if (0 < local_50 + event_models_active) {
      do {
        if (local_44 < local_50) {
          cop = coplist[local_44];
        }
        else {
          cop = EventCop + (local_44 - local_50);
        }
        local_4c = modelpointers1536[cop->type];
        local_38 = local_44 + 1;
        if (((((uint)local_4c->num_vertices - 3 < 300) && (local_4c->num_point_normals < 300)) &&
            (local_4c->num_polys < 300)) &&
           ((piVar6 = (int *)local_4c->collision_block, piVar6 != (int *)0x0 &&
            (iVar2 = (cop->pos).vx - iVar5, iVar3 = (cop->pos).vz - iVar7,
            iVar1 = local_4c->bounding_sphere + local_3c + (cp->hd).speed,
            iVar2 * iVar2 + iVar3 * iVar3 < iVar1 * iVar1)))) {
          piVar9 = piVar6 + 1;
          local_48 = *piVar6;
          iVar1 = 0;
          if (0 < local_48) {
            do {
              uVar4 = -(uint)cop->yang & 0x3f;
              local_60 = (int)*(short *)((int)piVar9 + 2) * (int)(&matrixtable)[uVar4].m[0] +
                         (int)*(short *)((int)piVar9 + 6) * (int)(&matrixtable)[uVar4].m[6] + 0x800
                         >> 0xc;
              local_58 = (int)*(short *)((int)piVar9 + 2) * (int)(&matrixtable)[uVar4].m[2] +
                         (int)*(short *)((int)piVar9 + 6) * (int)(&matrixtable)[uVar4].m[8] + 0x800
                         >> 0xc;
              local_88.pos.vx = (cop->pos).vx + local_60;
              local_88.pos.vy = (cop->pos).vy + (int)*(short *)(piVar9 + 1);
              local_88.pos.vz = (cop->pos).vz + local_58;
              local_88.pos.pad = (uint)(local_4c->flags2 >> 10) & 1;
              iVar2 = (uint)*(ushort *)((int)piVar9 + 0x12) << 0x10;
              local_88.xsize = (iVar2 >> 0x10) - (iVar2 >> 0x1f) >> 1;
              iVar2 = (uint)*(ushort *)((int)piVar9 + 0xe) << 0x10;
              local_88.zsize = (iVar2 >> 0x10) - (iVar2 >> 0x1f) >> 1;
              local_88.height = (int)*(short *)(piVar9 + 4);
              local_88.theta = ((uint)cop->yang + (int)*(short *)((int)piVar9 + 10)) * 0x40 & 0xfff;
              gLastModelCollisionCheck = cop->type;
              if ((int)(cp[-0x503].ap.old_clock + 2) * -0x24ca58e9 >> 2 == 0x15) {
                if ((local_44 < local_50) || (cop->pad == '\0')) {
                  CarBuildingCollision(cp,&local_88,cop,0);
                }
                else {
                  iVar2 = CarBuildingCollision(cp,&local_88,cop,0);
                  if (iVar2 != 0) {
                    bKillTanner = 1;
                    player.dying = '\x01';
                  }
                }
              }
              else {
                if (cp->controlType == '\x05') {
                  if (((modelpointers1536[cop->type]->flags2 & 0xa00) == 0) &&
                     ((100 < local_88.xsize || (100 < local_88.zsize)))) {
                    iVar2 = 5;
                    local_88.xsize = local_88.xsize + 100;
                    local_88.zsize = local_88.zsize + 100;
                    iVar3 = local_40 >> 0x1f;
                    while (((iVar8 = local_40 - iVar3 >> 1, iVar8 <= gCameraDistance &&
                            (local_30 = iVar2, iVar2 = CarBuildingCollision(cp,&local_88,cop,0),
                            iVar2 != 0)) && (0 < local_30))) {
                      gCameraDistance = gCameraDistance - boxOverlap;
                      if (gCameraDistance < iVar8) {
                        gCameraDistance = iVar8;
                      }
                      iVar8 = gCameraDistance;
                      uVar4 = (cp->hd).direction & 0xfff;
                      (cp->hd).where.t[0] =
                           local_68 +
                           ((gCameraDistance * rcossin_tbl[uVar4 * 2]) / 2 + 0x800 >> 0xc);
                      iVar2 = local_30 + -1;
                      (cp->hd).where.t[2] =
                           local_64 + ((iVar8 * rcossin_tbl[uVar4 * 2 + 1]) / 2 + 0x800 >> 0xc);
                    }
                  }
                }
                else {
                  if ((local_44 < local_50) || (cop->pad == '\0')) {
                    iVar2 = CarBuildingCollision
                                      (cp,&local_88,cop,(uint)(local_4c->flags2 >> 10) & 1);
                    if (iVar2 != 0) {
                      (cp->ap).needsDenting = '\x01';
                    }
                  }
                  else {
                    *(int *)(cp->st + 0x24) = (int)&ExBoxDamage + *(int *)(cp->st + 0x24);
                    iVar2 = CarBuildingCollision(cp,&local_88,cop,0);
                    if (iVar2 != 0) {
                      (cp->ap).needsDenting = '\x01';
                    }
                    *(int *)(cp->st + 0x24) = *(int *)(cp->st + 0x24) + -700000;
                  }
                }
              }
              iVar1 = iVar1 + 1;
              piVar9 = piVar9 + 5;
            } while (iVar1 < local_48);
          }
        }
        local_44 = local_38;
      } while (local_38 < local_50 + event_models_active);
    }
    EventCollisions(cp,1);
  }
  return;
}



// decompiled code
// original method signature: 
// int /*$ra*/ QuickBuildingCollisionCheck(struct VECTOR *pPos /*$s5*/, int dir /*stack 4*/, int l /*stack 8*/, int w /*$fp*/, int extra /*stack 16*/)
 // line 609, offset 0x0006adbc
	/* begin block 1 */
		// Start line: 610
		// Start offset: 0x0006ADBC
		// Variables:
	// 		struct MODEL *model; // $a1
	// 		struct CELL_OBJECT *cop; // $s3
	// 		struct VECTOR player_pos; // stack offset -112
	// 		struct COLLISION_PACKET *collide; // $s0
	// 		int cell_x; // $a0
	// 		int xd; // $v1
	// 		int zd; // $a0
	// 		int num_cb; // $s7
	// 		int box_loop; // $s4
	// 		int sphere_sq; // $v0
	// 		int x1; // $s6
	// 		struct BUILDING_BOX bbox; // stack offset -96
	// 		int mdcount; // stack offset -48

		/* begin block 1.1 */
			// Start line: 669
			// Start offset: 0x0006AFA4
			// Variables:
		// 		struct BUILDING_BOX *pbox; // $s1
		// 		struct MATRIX *mat; // $a1
		// 		struct VECTOR offset; // stack offset -64

			/* begin block 1.1.1 */
				// Start line: 685
				// Start offset: 0x0006B0F0
			/* end block 1.1.1 */
			// End offset: 0x0006B1BC
			// End Line: 712
		/* end block 1.1 */
		// End offset: 0x0006B1BC
		// End Line: 714
	/* end block 1 */
	// End offset: 0x0006B220
	// End Line: 721

	/* begin block 2 */
		// Start line: 1891
	/* end block 2 */
	// End Line: 1892

int QuickBuildingCollisionCheck(VECTOR *pPos,int dir,int l,int w,int extra)

{
  bool bVar1;
  int iVar2;
  int iVar3;
  int iVar4;
  int iVar5;
  int iVar6;
  int iVar7;
  MODEL *pMVar8;
  uint uVar9;
  int *piVar10;
  int iVar11;
  int iVar12;
  int *piVar13;
  CELL_OBJECT *pCVar14;
  short local_5c;
  int local_30 [2];
  
  iVar5 = pPos->vx;
  boxOverlap = -1;
  iVar11 = pPos->vz;
  iVar12 = iVar5 + units_across_halved;
  iVar4 = iVar12 + -0x400;
  if (iVar4 < 0) {
    iVar4 = iVar12 + 0x3ff;
  }
  iVar12 = iVar11 + units_down_halved;
  iVar7 = iVar12 + -0x400;
  if (iVar7 < 0) {
    iVar7 = iVar12 + 0x3ff;
  }
  SetCopListCell(iVar4 >> 0xb,iVar7 >> 0xb);
  local_30[0] = 0;
  Havana3DOcclusion(0x5c,local_30);
  iVar4 = 0;
  if (0 < local_30[0] + event_models_active) {
    bVar1 = 0 < local_30[0];
    do {
      if (bVar1) {
        pCVar14 = coplist[iVar4];
      }
      else {
        pCVar14 = EventCop + (iVar4 - local_30[0]);
      }
      pMVar8 = modelpointers1536[pCVar14->type];
      if (((((uint)pMVar8->num_vertices - 3 < 300) && (pMVar8->num_point_normals < 300)) &&
          (pMVar8->num_polys < 300)) &&
         ((piVar10 = (int *)pMVar8->collision_block, piVar10 != (int *)0x0 &&
          (iVar7 = (pCVar14->pos).vx - iVar5, iVar6 = (pCVar14->pos).vz - iVar11,
          iVar12 = pMVar8->bounding_sphere + extra, iVar7 * iVar7 + iVar6 * iVar6 < iVar12 * iVar12)
          ))) {
        piVar13 = piVar10 + 1;
        iVar7 = *piVar10;
        iVar12 = 0;
        if (0 < iVar7) {
          do {
            uVar9 = -(uint)pCVar14->yang & 0x3f;
            local_5c = (short)(pCVar14->pos).vy + *(short *)(piVar13 + 1);
            iVar2 = (uint)*(ushort *)((int)piVar13 + 0x12) << 0x10;
            iVar3 = (uint)*(ushort *)((int)piVar13 + 0xe) << 0x10;
            iVar6 = pPos->vy + (int)local_5c;
            if (iVar6 < 0) {
              iVar6 = -iVar6;
            }
            if (iVar6 < ((int)((uint)*(ushort *)(piVar13 + 4) << 0x10) >> 0x10) -
                        ((int)((uint)*(ushort *)(piVar13 + 4) << 0x10) >> 0x1f) >> 1) {
              CDATA2D_000d920c.theta =
                   ((uint)pCVar14->yang + (int)*(short *)((int)piVar13 + 10)) * 0x40 & 0xfff;
              gLastModelCollisionCheck = pCVar14->type;
              cd.x.vx = pPos->vx;
              cd.x.vz = pPos->vz;
              CDATA2D_000d920c.length[1] = ((iVar3 >> 0x10) - (iVar3 >> 0x1f) >> 1) + 100;
              cd.vel.vx = 0;
              cd.vel.vz = 0;
              CDATA2D_000d920c.x.vx =
                   pPos->vx +
                   ((int)((((pCVar14->pos).vx +
                            ((int)*(short *)((int)piVar13 + 2) * (int)(&matrixtable)[uVar9].m[0] +
                             (int)*(short *)((int)piVar13 + 6) * (int)(&matrixtable)[uVar9].m[6] +
                             0x800 >> 0xc) & 0xffffU) - (uint)*(ushort *)&pPos->vx) * 0x10000) >>
                   0x10);
              CDATA2D_000d920c.vel.vx = 0;
              CDATA2D_000d920c.vel.vz = 0;
              CDATA2D_000d920c.avel = 0;
              CDATA2D_000d920c.x.vz =
                   pPos->vz +
                   ((int)((((pCVar14->pos).vz +
                            ((int)*(short *)((int)piVar13 + 2) * (int)(&matrixtable)[uVar9].m[2] +
                             (int)*(short *)((int)piVar13 + 6) * (int)(&matrixtable)[uVar9].m[8] +
                             0x800 >> 0xc) & 0xffffU) - (uint)*(ushort *)&pPos->vz) * 0x10000) >>
                   0x10);
              cd.theta = dir;
              cd.length[0] = l;
              cd.length[1] = w;
              CDATA2D_000d920c.length[0] = ((iVar2 >> 0x10) - (iVar2 >> 0x1f) >> 1) + 100;
              iVar6 = bcollided2d(&cd,1);
              if (iVar6 != 0) {
                return 1;
              }
            }
            iVar12 = iVar12 + 1;
            piVar13 = piVar13 + 5;
          } while (iVar12 < iVar7);
        }
      }
      iVar4 = iVar4 + 1;
      bVar1 = iVar4 < local_30[0];
    } while (iVar4 < local_30[0] + event_models_active);
  }
  return 0;
}



// decompiled code
// original method signature: 
// void /*$ra*/ DoScenaryCollisions()
 // line 735, offset 0x0006b220
	/* begin block 1 */
		// Start line: 737
		// Start offset: 0x0006B220
		// Variables:
	// 		struct _CAR_DATA *lcp; // $s0
	/* end block 1 */
	// End offset: 0x0006B2EC
	// End Line: 753

	/* begin block 2 */
		// Start line: 2307
	/* end block 2 */
	// End Line: 2308

	/* begin block 3 */
		// Start line: 2322
	/* end block 3 */
	// End Line: 2323

	/* begin block 4 */
		// Start line: 2323
	/* end block 4 */
	// End Line: 2324

	/* begin block 5 */
		// Start line: 2324
	/* end block 5 */
	// End Line: 2325

/* WARNING: Unknown calling convention yet parameter storage is locked */

void DoScenaryCollisions(void)

{
  _CAR_DATA *cp;
  
  cp = car_data + 0x13;
  do {
    if (cp->controlType != '\0') {
      if (cp->controlType == '\x02') {
        if ((cp->totalDamage != 0) &&
           ((10 < (cp->hd).speed || (((uint)(byte)cp->id + CameraCnt & 3) == 0)))) {
          CheckScenaryCollisions(cp);
        }
      }
      else {
        CheckScenaryCollisions(cp);
      }
    }
    cp = cp + -1;
  } while (car_data <= cp);
  return;
}