godot_voxel/voxel_map.h
2019-01-01 16:44:19 +00:00

158 lines
5.1 KiB
C++

#ifndef VOXEL_MAP_H
#define VOXEL_MAP_H
#include "voxel_block.h"
#include <core/hash_map.h>
#include <scene/main/node.h>
// Infinite voxel storage by means of octants like Gridmap
class VoxelMap : public Reference {
GDCLASS(VoxelMap, Reference)
public:
// Converts voxel coodinates into block coordinates.
// Don't use division because it introduces an offset in negative coordinates.
static _FORCE_INLINE_ Vector3i voxel_to_block_b(Vector3i pos, int block_size_pow2) {
return Vector3i(
pos.x >> block_size_pow2,
pos.y >> block_size_pow2,
pos.z >> block_size_pow2);
}
_FORCE_INLINE_ Vector3i voxel_to_block(Vector3i pos) const {
return voxel_to_block_b(pos, _block_size_pow2);
}
_FORCE_INLINE_ Vector3i to_local(Vector3i pos) const {
return Vector3i(
pos.x & _block_size_mask,
pos.y & _block_size_mask,
pos.z & _block_size_mask);
}
// Converts block coodinates into voxel coordinates
_FORCE_INLINE_ Vector3i block_to_voxel(Vector3i bpos) const {
return bpos * _block_size;
}
VoxelMap();
~VoxelMap();
_FORCE_INLINE_ unsigned int get_block_size() const { return _block_size; }
_FORCE_INLINE_ unsigned int get_block_size_pow2() const { return _block_size_pow2; }
_FORCE_INLINE_ unsigned int get_block_size_mask() const { return _block_size_mask; }
int get_voxel(Vector3i pos, unsigned int c = 0);
void set_voxel(int value, Vector3i pos, unsigned int c = 0);
void set_default_voxel(int value, unsigned int channel = 0);
int get_default_voxel(unsigned int channel = 0);
// Gets a copy of all voxels in the area starting at min_pos having the same size as dst_buffer.
void get_buffer_copy(Vector3i min_pos, VoxelBuffer &dst_buffer, unsigned int channels_mask = 1);
// Moves the given buffer into a block of the map. The buffer is referenced, no copy is made.
void set_block_buffer(Vector3i bpos, Ref<VoxelBuffer> buffer);
struct NoAction {
inline void operator()(VoxelBlock *block) {}
};
template <typename Action_T>
void remove_block(Vector3i bpos, Action_T pre_delete) {
if(_last_accessed_block && _last_accessed_block->pos == bpos)
_last_accessed_block = NULL;
VoxelBlock **pptr = _blocks.getptr(bpos);
if(pptr) {
VoxelBlock *block = *pptr;
ERR_FAIL_COND(block == NULL);
pre_delete(block);
memdelete(block);
_blocks.erase(bpos);
}
}
/*template <typename Action_T>
void remove_blocks_not_in_area(Vector3i min, Vector3i max, Action_T pre_delete = NoAction()) {
Vector3i::sort_min_max(min, max);
Vector<Vector3i> to_remove;
const Vector3i *key = NULL;
while (key = _blocks.next(key)) {
VoxelBlock *block_ptr = _blocks.get(*key);
ERR_FAIL_COND(block_ptr == NULL); // Should never trigger
if (block_ptr->pos.is_contained_in(min, max)) {
to_remove.push_back(*key);
if (block_ptr == _last_accessed_block)
_last_accessed_block = NULL;
pre_delete(block_ptr);
memdelete(block_ptr);
}
}
for (unsigned int i = 0; i < to_remove.size(); ++i) {
_blocks.erase(to_remove[i]);
}
}*/
VoxelBlock *get_block(Vector3i bpos);
bool has_block(Vector3i pos) const;
bool is_block_surrounded(Vector3i pos) const;
void clear();
template <typename Op_T>
void for_all_blocks(Op_T op) {
const Vector3i *key = NULL;
while (key = _blocks.next(key)) {
VoxelBlock *block = _blocks.get(*key);
if (block != NULL) {
op(block);
}
}
}
private:
void set_block(Vector3i bpos, VoxelBlock *block);
void set_block_size_pow2(unsigned int p);
static void _bind_methods();
_FORCE_INLINE_ int _get_voxel_binding(int x, int y, int z, unsigned int c = 0) { return get_voxel(Vector3i(x, y, z), c); }
_FORCE_INLINE_ void _set_voxel_binding(int value, int x, int y, int z, unsigned int c = 0) { set_voxel(value, Vector3i(x, y, z), c); }
_FORCE_INLINE_ int _get_voxel_v_binding(Vector3 pos, unsigned int c = 0) { return get_voxel(Vector3i(pos), c); }
_FORCE_INLINE_ void _set_voxel_v_binding(int value, Vector3 pos, unsigned int c = 0) { set_voxel(value, Vector3i(pos), c); }
_FORCE_INLINE_ bool _has_block_binding(int x, int y, int z) { return has_block(Vector3i(x, y, z)); }
_FORCE_INLINE_ Vector3 _voxel_to_block_binding(Vector3 pos) const { return voxel_to_block(Vector3i(pos)).to_vec3(); }
_FORCE_INLINE_ Vector3 _block_to_voxel_binding(Vector3 pos) const { return block_to_voxel(Vector3i(pos)).to_vec3(); }
bool _is_block_surrounded(Vector3 pos) const { return is_block_surrounded(Vector3i(pos)); }
void _get_buffer_copy_binding(Vector3 pos, Ref<VoxelBuffer> dst_buffer_ref, unsigned int channel = 0);
void _set_block_buffer_binding(Vector3 bpos, Ref<VoxelBuffer> buffer) { set_block_buffer(Vector3i(bpos), buffer); }
private:
// Voxel values that will be returned if access is out of map bounds
uint8_t _default_voxel[VoxelBuffer::MAX_CHANNELS];
// Blocks stored with a spatial hash in all 3D directions
HashMap<Vector3i, VoxelBlock *, Vector3iHasher> _blocks;
// Voxel access will most frequently be in contiguous areas, so the same blocks are accessed.
// To prevent too much hashing, this reference is checked before.
VoxelBlock *_last_accessed_block;
unsigned int _block_size;
unsigned int _block_size_pow2;
unsigned int _block_size_mask;
};
#endif // VOXEL_MAP_H