mirror of
https://github.com/Relintai/godot_voxel.git
synced 2024-11-11 20:35:08 +01:00
91a5c7ffa8
- Moved HermiteValue in its own file - VoxelBuffer channels are now predefined - Create DualGridGenerator for easier passing of data - Chunk size is no longer hardcoded - Respect padding when polygonizing voxels - BUG: due to the above, the way we build the octree is now breaking the result as mentionned in the TODO
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
#ifndef HERMITE_VALUE_H
|
|
#define HERMITE_VALUE_H
|
|
|
|
#include "../utility.h"
|
|
#include "../voxel_buffer.h"
|
|
#include <core/math/vector3.h>
|
|
|
|
namespace dmc {
|
|
|
|
struct HermiteValue {
|
|
// TODO Rename isolevel
|
|
float value; // Signed "distance" to surface
|
|
Vector3 gradient; // "Normal" of the volume
|
|
|
|
HermiteValue() :
|
|
value(1.0) {
|
|
}
|
|
};
|
|
|
|
inline HermiteValue get_hermite_value(const VoxelBuffer &voxels, unsigned int x, unsigned int y, unsigned int z) {
|
|
|
|
x = x >= voxels.get_size().x ? voxels.get_size().x - 1 : x;
|
|
x = x >= voxels.get_size().y ? voxels.get_size().y - 1 : x;
|
|
x = x >= voxels.get_size().z ? voxels.get_size().z - 1 : x;
|
|
|
|
HermiteValue v;
|
|
|
|
v.value = voxels.get_voxel_iso(x, y, z, VoxelBuffer::CHANNEL_ISOLEVEL);
|
|
// TODO It looks like this gradient should not be a normalized vector!
|
|
v.gradient.x = voxels.get_voxel_iso(x, y, z, VoxelBuffer::CHANNEL_GRADIENT_X);
|
|
v.gradient.y = voxels.get_voxel_iso(x, y, z, VoxelBuffer::CHANNEL_GRADIENT_Y);
|
|
v.gradient.z = voxels.get_voxel_iso(x, y, z, VoxelBuffer::CHANNEL_GRADIENT_Z);
|
|
|
|
return v;
|
|
}
|
|
|
|
inline HermiteValue get_interpolated_hermite_value(const VoxelBuffer &voxels, Vector3 pos) {
|
|
|
|
int x0 = static_cast<int>(pos.x);
|
|
int y0 = static_cast<int>(pos.y);
|
|
int z0 = static_cast<int>(pos.z);
|
|
|
|
int x1 = static_cast<int>(Math::ceil(pos.x));
|
|
int y1 = static_cast<int>(Math::ceil(pos.y));
|
|
int z1 = static_cast<int>(Math::ceil(pos.z));
|
|
|
|
HermiteValue v0 = get_hermite_value(voxels, x0, y0, z0);
|
|
HermiteValue v1 = get_hermite_value(voxels, x1, y0, z0);
|
|
HermiteValue v2 = get_hermite_value(voxels, x1, y0, z1);
|
|
HermiteValue v3 = get_hermite_value(voxels, x0, y0, z1);
|
|
|
|
HermiteValue v4 = get_hermite_value(voxels, x0, y1, z0);
|
|
HermiteValue v5 = get_hermite_value(voxels, x1, y1, z0);
|
|
HermiteValue v6 = get_hermite_value(voxels, x1, y1, z1);
|
|
HermiteValue v7 = get_hermite_value(voxels, x0, y1, z1);
|
|
|
|
Vector3 rpos = pos - Vector3(x0, y0, z0);
|
|
|
|
HermiteValue v;
|
|
v.value = ::interpolate(v0.value, v1.value, v2.value, v3.value, v4.value, v5.value, v6.value, v7.value, rpos);
|
|
v.gradient = ::interpolate(v0.gradient, v1.gradient, v2.gradient, v3.gradient, v4.gradient, v5.gradient, v6.gradient, v7.gradient, rpos);
|
|
|
|
return v;
|
|
}
|
|
|
|
} // namespace dmc
|
|
|
|
#endif // HERMITE_VALUE_H
|