CPooledVBAllocator_ColorMesh::Allocate

/* CPooledVBAllocator_ColorMesh::Allocate(int) */

int __thiscall
CPooledVBAllocator_ColorMesh::Allocate(CPooledVBAllocator_ColorMesh *this,int param_1)

{
  int iVar1;
  
  if (*(int *)(this + 4) == 0) {
    Warning(
           "ERROR: CPooledVBAllocator_ColorMesh::Allocate cannot be called before Init (expect a crash)\n"
           );
    iVar1 = -1;
  }
  else if (this[0x20] == (CPooledVBAllocator_ColorMesh)0x0) {
    if (*(int *)(this + 0xc) - *(int *)(this + 0x18) < param_1) {
      Warning(
             "ERROR: CPooledVBAllocator_ColorMesh::Allocate failing - not enough space left in the vertex buffer!\n"
             );
      iVar1 = -1;
    }
    else {
      iVar1 = *(int *)(this + 0x1c);
      *(int *)(this + 0x18) = *(int *)(this + 0x18) + param_1;
      *(int *)(this + 0x14) = *(int *)(this + 0x14) + 1;
      *(int *)(this + 0x1c) = param_1 * *(int *)(this + 0x10) + iVar1;
    }
  }
  else {
    Warning(
           "ERROR: CPooledVBAllocator_ColorMesh::Allocate being called after some (but not all) calls to Deallocate have been called - invalid! (expect visual artifacts)\n"
           );
    iVar1 = -1;
  }
  return iVar1;
}