/**
* Load a voxel stack from the save game file.
* @param ldr Input stream to read.
*/
void VoxelStack::Load(Loader &ldr)
{
this->Clear();
uint32 version = ldr.OpenBlock("VSTK");
if (version >= 1 && version <= 3) {
int16 base = ldr.GetWord();
uint16 height = ldr.GetWord();
uint8 owner = ldr.GetByte();
if (base < 0 || base + height > WORLD_Z_SIZE || owner >= OWN_COUNT) {
ldr.SetFailMessage("Incorrect voxel stack size");
} else {
this->base = base;
this->height = height;
this->owner = (TileOwner)owner;
delete[] this->voxels;
this->voxels = (height > 0) ? MakeNewVoxels(height) : nullptr;
for (uint i = 0; i < height; i++) this->voxels[i].Load(ldr, version);
/* In version 3 of VSTK, the fences of the lowest corner of steep slopes have moved from the top voxel to the base voxel. */
if (version < 3) {
static const uint16 low_fences_mask[4] = { // Mask for getting the low fences.
(0xf << (4 * EDGE_SE)) | (0xf << (4 * EDGE_SW)), // ISL_TOP_STEEP_NORTH
(0xf << (4 * EDGE_SW)) | (0xf << (4 * EDGE_NW)), // ISL_TOP_STEEP_EAST
(0xf << (4 * EDGE_NW)) | (0xf << (4 * EDGE_NE)), // ISL_TOP_STEEP_SOUTH
(0xf << (4 * EDGE_NE)) | (0xf << (4 * EDGE_SE)), // ISL_TOP_STEEP_WEST
};
for (uint i = 0; i < height; i++) {
if (this->voxels[i].GetGroundType() == GTP_INVALID) continue;
if (!IsImplodedSteepSlopeTop(this->voxels[i].GetGroundSlope())) continue;
uint16 mask = low_fences_mask[this->voxels[i].GetGroundSlope() - ISL_TOP_STEEP_NORTH];
/* Take out the fences of the top voxel that should be in the base voxel.
* Make the low fences in the high voxel invalid. */
uint16 fences = this->voxels[i].GetFences();
uint16 lower_fences = fences & mask;
uint16 high_invalid = ALL_INVALID_FENCES & mask;
mask ^= 0xffff;
this->voxels[i].SetFences(high_invalid | (fences & mask));
/* Fix low fences. */
fences = this->voxels[i + 1].GetFences();
this->voxels[i + 1].SetFences(lower_fences | (fences & mask));
break; // Only one steep ground slope in a voxel stack at most.
}
}
}
}
ldr.CloseBlock();
}
/**
* Load a voxel from the save game.
* @param ldr Input stream to read.
* @param version Version to load.
*/
void Voxel::Load(Loader &ldr, uint32 version)
{
this->ClearVoxel();
if (version >= 1 && version <= 3) {
this->ground = ldr.GetLong(); /// \todo Check sanity of the data.
this->instance = ldr.GetByte();
if (this->instance == SRI_FREE) {
this->instance_data = 0; // Full rides load after the world, overwriting map data.
} else if (this->instance >= SRI_RIDES_START && this->instance < SRI_FULL_RIDES) {
this->instance_data = ldr.GetWord();
} else {
this->instance_data = 0; // Full rides load after the world, overwriting map data.
ldr.SetFailMessage("Unknown voxel instance data");
}
if (version >= 2) this->fences = ldr.GetWord();
} else {
ldr.SetFailMessage("Unknown voxel version");
}
}