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test/source/blender/blenlib/intern/voxel.c
Sergey Sharybin c1bc70b711 Cleanup: Add a copyright notice to files and use SPDX format 
A lot of files were missing copyright field in the header and
the Blender Foundation contributed to them in a sense of bug
fixing and general maintenance.

This change makes it explicit that those files are at least
partially copyrighted by the Blender Foundation.

Note that this does not make it so the Blender Foundation is
the only holder of the copyright in those files, and developers
who do not have a signed contract with the foundation still
hold the copyright as well.

Another aspect of this change is using SPDX format for the
header. We already used it for the license specification,
and now we state it for the copyright as well, following the
FAQ:

    https://reuse.software/faq/
2023-05-31 16:19:06 +02:00

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/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bli
*/
#include "BLI_utildefines.h"
#include "BLI_voxel.h"
#include "BLI_strict_flags.h"
BLI_INLINE float D(const float *data, const int res[3], int x, int y, int z)
{
CLAMP(x, 0, res[0] - 1);
CLAMP(y, 0, res[1] - 1);
CLAMP(z, 0, res[2] - 1);
return data[BLI_VOXEL_INDEX(x, y, z, res)];
}
/* *** nearest neighbor *** */
float BLI_voxel_sample_nearest(const float *data, const int res[3], const float co[3])
{
int xi, yi, zi;
xi = (int)(co[0] * (float)res[0]);
yi = (int)(co[1] * (float)res[1]);
zi = (int)(co[2] * (float)res[2]);
return D(data, res, xi, yi, zi);
}
/* returns highest integer <= x as integer (slightly faster than floor()) */
BLI_INLINE int FLOORI(float x)
{
const int r = (int)x;
return ((x >= 0.0f) || (float)r == x) ? r : (r - 1);
}
/**
* clamp function, cannot use the CLAMPIS macro,
* it sometimes returns unwanted results apparently related to
* gcc optimization flag `-fstrict-overflow` which is enabled at `-O2`
*
* this causes the test (x + 2) < 0 with int x == 2147483647 to return false (x being an integer,
* x + 2 should wrap around to -2147483647 so the test < 0 should return true, which it doesn't).
*/
BLI_INLINE int64_t _clamp(int a, int b, int c)
{
return (a < b) ? b : ((a > c) ? c : a);
}
float BLI_voxel_sample_trilinear(const float *data, const int res[3], const float co[3])
{
if (data) {
const float xf = co[0] * (float)res[0] - 0.5f;
const float yf = co[1] * (float)res[1] - 0.5f;
const float zf = co[2] * (float)res[2] - 0.5f;
const int x = FLOORI(xf), y = FLOORI(yf), z = FLOORI(zf);
const int64_t xc[2] = {
_clamp(x, 0, res[0] - 1),
_clamp(x + 1, 0, res[0] - 1),
};
const int64_t yc[2] = {
_clamp(y, 0, res[1] - 1) * res[0],
_clamp(y + 1, 0, res[1] - 1) * res[0],
};
const int64_t zc[2] = {
_clamp(z, 0, res[2] - 1) * res[0] * res[1],
_clamp(z + 1, 0, res[2] - 1) * res[0] * res[1],
};
const float dx = xf - (float)x;
const float dy = yf - (float)y;
const float dz = zf - (float)z;
const float u[2] = {1.0f - dx, dx};
const float v[2] = {1.0f - dy, dy};
const float w[2] = {1.0f - dz, dz};
return w[0] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[0]] + u[1] * data[xc[1] + yc[0] + zc[0]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[0]] + u[1] * data[xc[1] + yc[1] + zc[0]])) +
w[1] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[1]] + u[1] * data[xc[1] + yc[0] + zc[1]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[1]] + u[1] * data[xc[1] + yc[1] + zc[1]]));
}
return 0.0f;
}
float BLI_voxel_sample_triquadratic(const float *data, const int res[3], const float co[3])
{
if (data) {
const float xf = co[0] * (float)res[0];
const float yf = co[1] * (float)res[1];
const float zf = co[2] * (float)res[2];
const int x = FLOORI(xf), y = FLOORI(yf), z = FLOORI(zf);
const int64_t xc[3] = {
_clamp(x - 1, 0, res[0] - 1),
_clamp(x, 0, res[0] - 1),
_clamp(x + 1, 0, res[0] - 1),
};
const int64_t yc[3] = {
_clamp(y - 1, 0, res[1] - 1) * res[0],
_clamp(y, 0, res[1] - 1) * res[0],
_clamp(y + 1, 0, res[1] - 1) * res[0],
};
const int64_t zc[3] = {
_clamp(z - 1, 0, res[2] - 1) * res[0] * res[1],
_clamp(z, 0, res[2] - 1) * res[0] * res[1],
_clamp(z + 1, 0, res[2] - 1) * res[0] * res[1],
};
const float dx = xf - (float)x, dy = yf - (float)y, dz = zf - (float)z;
const float u[3] = {dx * (0.5f * dx - 1.0f) + 0.5f, dx * (1.0f - dx) + 0.5f, 0.5f * dx * dx};
const float v[3] = {dy * (0.5f * dy - 1.0f) + 0.5f, dy * (1.0f - dy) + 0.5f, 0.5f * dy * dy};
const float w[3] = {dz * (0.5f * dz - 1.0f) + 0.5f, dz * (1.0f - dz) + 0.5f, 0.5f * dz * dz};
return w[0] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[0]] + u[1] * data[xc[1] + yc[0] + zc[0]] +
u[2] * data[xc[2] + yc[0] + zc[0]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[0]] + u[1] * data[xc[1] + yc[1] + zc[0]] +
u[2] * data[xc[2] + yc[1] + zc[0]]) +
v[2] * (u[0] * data[xc[0] + yc[2] + zc[0]] + u[1] * data[xc[1] + yc[2] + zc[0]] +
u[2] * data[xc[2] + yc[2] + zc[0]])) +
w[1] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[1]] + u[1] * data[xc[1] + yc[0] + zc[1]] +
u[2] * data[xc[2] + yc[0] + zc[1]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[1]] + u[1] * data[xc[1] + yc[1] + zc[1]] +
u[2] * data[xc[2] + yc[1] + zc[1]]) +
v[2] * (u[0] * data[xc[0] + yc[2] + zc[1]] + u[1] * data[xc[1] + yc[2] + zc[1]] +
u[2] * data[xc[2] + yc[2] + zc[1]])) +
w[2] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[2]] + u[1] * data[xc[1] + yc[0] + zc[2]] +
u[2] * data[xc[2] + yc[0] + zc[2]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[2]] + u[1] * data[xc[1] + yc[1] + zc[2]] +
u[2] * data[xc[2] + yc[1] + zc[2]]) +
v[2] * (u[0] * data[xc[0] + yc[2] + zc[2]] + u[1] * data[xc[1] + yc[2] + zc[2]] +
u[2] * data[xc[2] + yc[2] + zc[2]]));
}
return 0.0f;
}
float BLI_voxel_sample_tricubic(const float *data,
const int res[3],
const float co[3],
int bspline)
{
if (data) {
const float xf = co[0] * (float)res[0] - 0.5f;
const float yf = co[1] * (float)res[1] - 0.5f;
const float zf = co[2] * (float)res[2] - 0.5f;
const int x = FLOORI(xf), y = FLOORI(yf), z = FLOORI(zf);
const int64_t xc[4] = {
_clamp(x - 1, 0, res[0] - 1),
_clamp(x, 0, res[0] - 1),
_clamp(x + 1, 0, res[0] - 1),
_clamp(x + 2, 0, res[0] - 1),
};
const int64_t yc[4] = {
_clamp(y - 1, 0, res[1] - 1) * res[0],
_clamp(y, 0, res[1] - 1) * res[0],
_clamp(y + 1, 0, res[1] - 1) * res[0],
_clamp(y + 2, 0, res[1] - 1) * res[0],
};
const int64_t zc[4] = {
_clamp(z - 1, 0, res[2] - 1) * res[0] * res[1],
_clamp(z, 0, res[2] - 1) * res[0] * res[1],
_clamp(z + 1, 0, res[2] - 1) * res[0] * res[1],
_clamp(z + 2, 0, res[2] - 1) * res[0] * res[1],
};
const float dx = xf - (float)x, dy = yf - (float)y, dz = zf - (float)z;
float u[4], v[4], w[4];
if (bspline) { /* B-Spline. */
u[0] = (((-1.0f / 6.0f) * dx + 0.5f) * dx - 0.5f) * dx + (1.0f / 6.0f);
u[1] = ((0.5f * dx - 1.0f) * dx) * dx + (2.0f / 3.0f);
u[2] = ((-0.5f * dx + 0.5f) * dx + 0.5f) * dx + (1.0f / 6.0f);
u[3] = (1.0f / 6.0f) * dx * dx * dx;
v[0] = (((-1.0f / 6.0f) * dy + 0.5f) * dy - 0.5f) * dy + (1.0f / 6.0f);
v[1] = ((0.5f * dy - 1.0f) * dy) * dy + (2.0f / 3.0f);
v[2] = ((-0.5f * dy + 0.5f) * dy + 0.5f) * dy + (1.0f / 6.0f);
v[3] = (1.0f / 6.0f) * dy * dy * dy;
w[0] = (((-1.0f / 6.0f) * dz + 0.5f) * dz - 0.5f) * dz + (1.0f / 6.0f);
w[1] = ((0.5f * dz - 1.0f) * dz) * dz + (2.0f / 3.0f);
w[2] = ((-0.5f * dz + 0.5f) * dz + 0.5f) * dz + (1.0f / 6.0f);
w[3] = (1.0f / 6.0f) * dz * dz * dz;
}
else { /* Catmull-Rom. */
u[0] = ((-0.5f * dx + 1.0f) * dx - 0.5f) * dx;
u[1] = ((1.5f * dx - 2.5f) * dx) * dx + 1.0f;
u[2] = ((-1.5f * dx + 2.0f) * dx + 0.5f) * dx;
u[3] = ((0.5f * dx - 0.5f) * dx) * dx;
v[0] = ((-0.5f * dy + 1.0f) * dy - 0.5f) * dy;
v[1] = ((1.5f * dy - 2.5f) * dy) * dy + 1.0f;
v[2] = ((-1.5f * dy + 2.0f) * dy + 0.5f) * dy;
v[3] = ((0.5f * dy - 0.5f) * dy) * dy;
w[0] = ((-0.5f * dz + 1.0f) * dz - 0.5f) * dz;
w[1] = ((1.5f * dz - 2.5f) * dz) * dz + 1.0f;
w[2] = ((-1.5f * dz + 2.0f) * dz + 0.5f) * dz;
w[3] = ((0.5f * dz - 0.5f) * dz) * dz;
}
return w[0] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[0]] + u[1] * data[xc[1] + yc[0] + zc[0]] +
u[2] * data[xc[2] + yc[0] + zc[0]] + u[3] * data[xc[3] + yc[0] + zc[0]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[0]] + u[1] * data[xc[1] + yc[1] + zc[0]] +
u[2] * data[xc[2] + yc[1] + zc[0]] + u[3] * data[xc[3] + yc[1] + zc[0]]) +
v[2] * (u[0] * data[xc[0] + yc[2] + zc[0]] + u[1] * data[xc[1] + yc[2] + zc[0]] +
u[2] * data[xc[2] + yc[2] + zc[0]] + u[3] * data[xc[3] + yc[2] + zc[0]]) +
v[3] * (u[0] * data[xc[0] + yc[3] + zc[0]] + u[1] * data[xc[1] + yc[3] + zc[0]] +
u[2] * data[xc[2] + yc[3] + zc[0]] + u[3] * data[xc[3] + yc[3] + zc[0]])) +
w[1] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[1]] + u[1] * data[xc[1] + yc[0] + zc[1]] +
u[2] * data[xc[2] + yc[0] + zc[1]] + u[3] * data[xc[3] + yc[0] + zc[1]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[1]] + u[1] * data[xc[1] + yc[1] + zc[1]] +
u[2] * data[xc[2] + yc[1] + zc[1]] + u[3] * data[xc[3] + yc[1] + zc[1]]) +
v[2] * (u[0] * data[xc[0] + yc[2] + zc[1]] + u[1] * data[xc[1] + yc[2] + zc[1]] +
u[2] * data[xc[2] + yc[2] + zc[1]] + u[3] * data[xc[3] + yc[2] + zc[1]]) +
v[3] * (u[0] * data[xc[0] + yc[3] + zc[1]] + u[1] * data[xc[1] + yc[3] + zc[1]] +
u[2] * data[xc[2] + yc[3] + zc[1]] + u[3] * data[xc[3] + yc[3] + zc[1]])) +
w[2] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[2]] + u[1] * data[xc[1] + yc[0] + zc[2]] +
u[2] * data[xc[2] + yc[0] + zc[2]] + u[3] * data[xc[3] + yc[0] + zc[2]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[2]] + u[1] * data[xc[1] + yc[1] + zc[2]] +
u[2] * data[xc[2] + yc[1] + zc[2]] + u[3] * data[xc[3] + yc[1] + zc[2]]) +
v[2] * (u[0] * data[xc[0] + yc[2] + zc[2]] + u[1] * data[xc[1] + yc[2] + zc[2]] +
u[2] * data[xc[2] + yc[2] + zc[2]] + u[3] * data[xc[3] + yc[2] + zc[2]]) +
v[3] * (u[0] * data[xc[0] + yc[3] + zc[2]] + u[1] * data[xc[1] + yc[3] + zc[2]] +
u[2] * data[xc[2] + yc[3] + zc[2]] + u[3] * data[xc[3] + yc[3] + zc[2]])) +
w[3] *
(v[0] * (u[0] * data[xc[0] + yc[0] + zc[3]] + u[1] * data[xc[1] + yc[0] + zc[3]] +
u[2] * data[xc[2] + yc[0] + zc[3]] + u[3] * data[xc[3] + yc[0] + zc[3]]) +
v[1] * (u[0] * data[xc[0] + yc[1] + zc[3]] + u[1] * data[xc[1] + yc[1] + zc[3]] +
u[2] * data[xc[2] + yc[1] + zc[3]] + u[3] * data[xc[3] + yc[1] + zc[3]]) +
v[2] * (u[0] * data[xc[0] + yc[2] + zc[3]] + u[1] * data[xc[1] + yc[2] + zc[3]] +
u[2] * data[xc[2] + yc[2] + zc[3]] + u[3] * data[xc[3] + yc[2] + zc[3]]) +
v[3] * (u[0] * data[xc[0] + yc[3] + zc[3]] + u[1] * data[xc[1] + yc[3] + zc[3]] +
u[2] * data[xc[2] + yc[3] + zc[3]] + u[3] * data[xc[3] + yc[3] + zc[3]]));
}
return 0.0f;
}
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