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Moved interpolation helper to common funcs

master
Marc Gilleron 2022-08-09 23:53:54 +01:00
parent 4d5f7c40db
commit 2d63797eb3
2 changed files with 16 additions and 16 deletions
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16
edition/funcs.h
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@ -140,6 +140,22 @@ inline float interpolate_trilinear(Span<const float> grid, const Vector3i res, c
grid[i000], grid[i100], grid[i101], grid[i001], grid[i010], grid[i110], grid[i111], grid[i011], pf);
}
template <typename Volume_F>
float get_sdf_interpolated(const Volume_F &f, Vector3 pos) {
const Vector3i c = math::floor_to_int(pos);
const float s000 = f(Vector3i(c.x, c.y, c.z));
const float s100 = f(Vector3i(c.x + 1, c.y, c.z));
const float s010 = f(Vector3i(c.x, c.y + 1, c.z));
const float s110 = f(Vector3i(c.x + 1, c.y + 1, c.z));
const float s001 = f(Vector3i(c.x, c.y, c.z + 1));
const float s101 = f(Vector3i(c.x + 1, c.y, c.z + 1));
const float s011 = f(Vector3i(c.x, c.y + 1, c.z + 1));
const float s111 = f(Vector3i(c.x + 1, c.y + 1, c.z + 1));
return math::interpolate_trilinear(s000, s100, s101, s001, s010, s110, s111, s011, to_vec3f(math::fract(pos)));
}
} // namespace zylann::voxel
namespace zylann::voxel::ops {

16
edition/voxel_tool_lod_terrain.cpp
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@ -29,22 +29,6 @@ bool VoxelToolLodTerrain::is_area_editable(const Box3i &box) const {
return _terrain->is_area_editable(box);
}
template <typename Volume_F>
float get_sdf_interpolated(const Volume_F &f, Vector3 pos) {
const Vector3i c = math::floor_to_int(pos);
const float s000 = f(Vector3i(c.x, c.y, c.z));
const float s100 = f(Vector3i(c.x + 1, c.y, c.z));
const float s010 = f(Vector3i(c.x, c.y + 1, c.z));
const float s110 = f(Vector3i(c.x + 1, c.y + 1, c.z));
const float s001 = f(Vector3i(c.x, c.y, c.z + 1));
const float s101 = f(Vector3i(c.x + 1, c.y, c.z + 1));
const float s011 = f(Vector3i(c.x, c.y + 1, c.z + 1));
const float s111 = f(Vector3i(c.x + 1, c.y + 1, c.z + 1));
return math::interpolate_trilinear(s000, s100, s101, s001, s010, s110, s111, s011, to_vec3f(math::fract(pos)));
}
// Binary search can be more accurate than linear regression because the SDF can be inaccurate in the first place.
// An alternative would be to polygonize a tiny area around the middle-phase hit position.
// `d1` is how far from `pos0` along `dir` the binary search will take place.