/**
* Verify that all voxels of this track piece are within world boundaries.
* @return The positioned track piece is entirely within the world boundaries.
* @pre Positioned track piece must have a piece.
*/
bool PositionedTrackPiece::IsOnWorld() const
{
assert(this->piece != nullptr);
if (!IsVoxelInsideWorld(this->base_voxel)) return false;
if (!IsVoxelInsideWorld(this->GetEndXYZ())) return false;
XYZPoint16 base = this->base_voxel;
return std::all_of(this->piece->track_voxels.begin(), this->piece->track_voxels.end(),
[base](TrackVoxel * tv){ return IsVoxelInsideWorld(base + tv->dxyz); });
}
/**
* Compute the voxel to display the arrow cursor.
* @return Computed position of the voxel that should contain the arrow cursor.
*/
XYZPoint16 PathBuildManager::ComputeArrowCursorPosition()
{
assert(this->state > PBS_WAIT_ARROW && this->state <= PBS_WAIT_BUY);
assert(this->selected_arrow != INVALID_EDGE);
Point16 dxy = _tile_dxy[this->selected_arrow];
XYZPoint16 arr_pos = this->pos + XYZPoint16(dxy.x, dxy.y, 0);
uint8 bit = 1 << this->selected_arrow;
if ((bit & this->allowed_arrows) == 0) { // Build direction is not at the bottom of the voxel.
assert(((bit << 4) & this->allowed_arrows) != 0); // Should be available at the top of the voxel.
arr_pos.z++;
}
/* Do some paranoia checking. */
assert(IsVoxelInsideWorld(arr_pos));
return arr_pos;
}