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9d04a61f3652565cfe84d8e8b5192bd93177ce1d
blender-archive/source/blender/blenlib/intern/math_vector.c
Campbell Barton a3a4386991 fix [#36105] Bevel UV Flicker 
interp_weights_poly_v2/3 functions used much too small an epsilon value, caused flickering.
2013-07-11 15:57:22 +00:00

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: some of this file.
*
* ***** END GPL LICENSE BLOCK *****
* */
/** \file blender/blenlib/intern/math_vector.c
* \ingroup bli
*/
#include "BLI_math.h"
//******************************* Interpolation *******************************/
void interp_v2_v2v2(float target[2], const float a[2], const float b[2], const float t)
{
float s = 1.0f - t;
target[0] = s * a[0] + t * b[0];
target[1] = s * a[1] + t * b[1];
}
/* weight 3 2D vectors,
* 'w' must be unit length but is not a vector, just 3 weights */
void interp_v2_v2v2v2(float p[2], const float v1[2], const float v2[2], const float v3[2], const float w[3])
{
p[0] = v1[0] * w[0] + v2[0] * w[1] + v3[0] * w[2];
p[1] = v1[1] * w[0] + v2[1] * w[1] + v3[1] * w[2];
}
void interp_v3_v3v3(float target[3], const float a[3], const float b[3], const float t)
{
float s = 1.0f - t;
target[0] = s * a[0] + t * b[0];
target[1] = s * a[1] + t * b[1];
target[2] = s * a[2] + t * b[2];
}
void interp_v4_v4v4(float target[4], const float a[4], const float b[4], const float t)
{
float s = 1.0f - t;
target[0] = s * a[0] + t * b[0];
target[1] = s * a[1] + t * b[1];
target[2] = s * a[2] + t * b[2];
target[3] = s * a[3] + t * b[3];
}
/* weight 3 vectors,
* 'w' must be unit length but is not a vector, just 3 weights */
void interp_v3_v3v3v3(float p[3], const float v1[3], const float v2[3], const float v3[3], const float w[3])
{
p[0] = v1[0] * w[0] + v2[0] * w[1] + v3[0] * w[2];
p[1] = v1[1] * w[0] + v2[1] * w[1] + v3[1] * w[2];
p[2] = v1[2] * w[0] + v2[2] * w[1] + v3[2] * w[2];
}
/* weight 3 vectors,
* 'w' must be unit length but is not a vector, just 4 weights */
void interp_v3_v3v3v3v3(float p[3], const float v1[3], const float v2[3], const float v3[3], const float v4[3], const float w[4])
{
p[0] = v1[0] * w[0] + v2[0] * w[1] + v3[0] * w[2] + v4[0] * w[3];
p[1] = v1[1] * w[0] + v2[1] * w[1] + v3[1] * w[2] + v4[1] * w[3];
p[2] = v1[2] * w[0] + v2[2] * w[1] + v3[2] * w[2] + v4[2] * w[3];
}
void interp_v4_v4v4v4(float p[4], const float v1[4], const float v2[4], const float v3[4], const float w[3])
{
p[0] = v1[0] * w[0] + v2[0] * w[1] + v3[0] * w[2];
p[1] = v1[1] * w[0] + v2[1] * w[1] + v3[1] * w[2];
p[2] = v1[2] * w[0] + v2[2] * w[1] + v3[2] * w[2];
p[3] = v1[3] * w[0] + v2[3] * w[1] + v3[3] * w[2];
}
void interp_v4_v4v4v4v4(float p[4], const float v1[4], const float v2[4], const float v3[4], const float v4[4], const float w[4])
{
p[0] = v1[0] * w[0] + v2[0] * w[1] + v3[0] * w[2] + v4[0] * w[3];
p[1] = v1[1] * w[0] + v2[1] * w[1] + v3[1] * w[2] + v4[1] * w[3];
p[2] = v1[2] * w[0] + v2[2] * w[1] + v3[2] * w[2] + v4[2] * w[3];
p[3] = v1[3] * w[0] + v2[3] * w[1] + v3[3] * w[2] + v4[3] * w[3];
}
void interp_v3_v3v3v3_uv(float p[3], const float v1[3], const float v2[3], const float v3[3], const float uv[2])
{
p[0] = v1[0] + ((v2[0] - v1[0]) * uv[0]) + ((v3[0] - v1[0]) * uv[1]);
p[1] = v1[1] + ((v2[1] - v1[1]) * uv[0]) + ((v3[1] - v1[1]) * uv[1]);
p[2] = v1[2] + ((v2[2] - v1[2]) * uv[0]) + ((v3[2] - v1[2]) * uv[1]);
}
void mid_v3_v3v3(float v[3], const float v1[3], const float v2[3])
{
v[0] = 0.5f * (v1[0] + v2[0]);
v[1] = 0.5f * (v1[1] + v2[1]);
v[2] = 0.5f * (v1[2] + v2[2]);
}
void mid_v2_v2v2(float v[2], const float v1[2], const float v2[2])
{
v[0] = 0.5f * (v1[0] + v2[0]);
v[1] = 0.5f * (v1[1] + v2[1]);
}
void mid_v3_v3v3v3(float v[3], const float v1[3], const float v2[3], const float v3[3])
{
v[0] = (v1[0] + v2[0] + v3[0]) / 3.0f;
v[1] = (v1[1] + v2[1] + v3[1]) / 3.0f;
v[2] = (v1[2] + v2[2] + v3[2]) / 3.0f;
}
/**
* Specialized function for calculating normals.
* fastpath for:
*
* \code{.c}
* add_v3_v3v3(r, a, b);
* normalize_v3(r)
* mul_v3_fl(r, angle_normalized_v3v3(a, b) / M_PI_2);
* \endcode
*
* We can use the length of (a + b) to calculate the angle.
*/
void mid_v3_v3v3_angle_weighted(float r[3], const float a[3], const float b[3])
{
/* trick, we want the middle of 2 normals as well as the angle between them
* avoid multiple calculations by */
float angle;
/* double check they are normalized */
BLI_ASSERT_UNIT_V3(a);
BLI_ASSERT_UNIT_V3(b);
add_v3_v3v3(r, a, b);
angle = ((float)(1.0 / (M_PI / 2.0)) *
/* normally we would only multiply by 2,
* but instead of an angle make this 0-1 factor */
2.0f) *
acosf(normalize_v3(r) / 2.0f);
mul_v3_fl(r, angle);
}
/**
* Same as mid_v3_v3v3_angle_weighted
* but \a r is assumed to be accumulated normals, divided by their total.
*/
void mid_v3_angle_weighted(float r[3])
{
/* trick, we want the middle of 2 normals as well as the angle between them
* avoid multiple calculations by */
float angle;
/* double check they are normalized */
BLI_assert(len_squared_v3(r) <= 1.0f + FLT_EPSILON);
angle = ((float)(1.0 / (M_PI / 2.0)) *
/* normally we would only multiply by 2,
* but instead of an angle make this 0-1 factor */
2.0f) *
acosf(normalize_v3(r));
mul_v3_fl(r, angle);
}
/**
* Equivalent to:
* interp_v3_v3v3(v, v1, v2, -1.0f);
*/
void flip_v4_v4v4(float v[4], const float v1[4], const float v2[4])
{
v[0] = v1[0] + (v1[0] - v2[0]);
v[1] = v1[1] + (v1[1] - v2[1]);
v[2] = v1[2] + (v1[2] - v2[2]);
v[3] = v1[3] + (v1[3] - v2[3]);
}
void flip_v3_v3v3(float v[3], const float v1[3], const float v2[3])
{
v[0] = v1[0] + (v1[0] - v2[0]);
v[1] = v1[1] + (v1[1] - v2[1]);
v[2] = v1[2] + (v1[2] - v2[2]);
}
void flip_v2_v2v2(float v[2], const float v1[2], const float v2[2])
{
v[0] = v1[0] + (v1[0] - v2[0]);
v[1] = v1[1] + (v1[1] - v2[1]);
}
/********************************** Angles ***********************************/
/* Return the angle in radians between vecs 1-2 and 2-3 in radians
* If v1 is a shoulder, v2 is the elbow and v3 is the hand,
* this would return the angle at the elbow.
*
* note that when v1/v2/v3 represent 3 points along a straight line
* that the angle returned will be pi (180deg), rather then 0.0
*/
float angle_v3v3v3(const float v1[3], const float v2[3], const float v3[3])
{
float vec1[3], vec2[3];
sub_v3_v3v3(vec1, v2, v1);
sub_v3_v3v3(vec2, v2, v3);
normalize_v3(vec1);
normalize_v3(vec2);
return angle_normalized_v3v3(vec1, vec2);
}
/* Quicker than full angle computation */
float cos_v3v3v3(const float p1[3], const float p2[3], const float p3[3])
{
float vec1[3], vec2[3];
sub_v3_v3v3(vec1, p2, p1);
sub_v3_v3v3(vec2, p2, p3);
normalize_v3(vec1);
normalize_v3(vec2);
return dot_v3v3(vec1, vec2);
}
/* Return the shortest angle in radians between the 2 vectors */
float angle_v3v3(const float v1[3], const float v2[3])
{
float vec1[3], vec2[3];
normalize_v3_v3(vec1, v1);
normalize_v3_v3(vec2, v2);
return angle_normalized_v3v3(vec1, vec2);
}
float angle_v2v2v2(const float v1[2], const float v2[2], const float v3[2])
{
float vec1[2], vec2[2];
vec1[0] = v2[0] - v1[0];
vec1[1] = v2[1] - v1[1];
vec2[0] = v2[0] - v3[0];
vec2[1] = v2[1] - v3[1];
normalize_v2(vec1);
normalize_v2(vec2);
return angle_normalized_v2v2(vec1, vec2);
}
/* Return the shortest angle in radians between the 2 vectors */
float angle_v2v2(const float v1[2], const float v2[2])
{
float vec1[2], vec2[2];
vec1[0] = v1[0];
vec1[1] = v1[1];
vec2[0] = v2[0];
vec2[1] = v2[1];
normalize_v2(vec1);
normalize_v2(vec2);
return angle_normalized_v2v2(vec1, vec2);
}
float angle_signed_v2v2(const float v1[2], const float v2[2])
{
const float perp_dot = (v1[1] * v2[0]) - (v1[0] * v2[1]);
return atan2f(perp_dot, dot_v2v2(v1, v2));
}
float angle_normalized_v3v3(const float v1[3], const float v2[3])
{
/* double check they are normalized */
BLI_ASSERT_UNIT_V3(v1);
BLI_ASSERT_UNIT_V3(v2);
/* this is the same as acos(dot_v3v3(v1, v2)), but more accurate */
if (dot_v3v3(v1, v2) < 0.0f) {
float vec[3];
vec[0] = -v2[0];
vec[1] = -v2[1];
vec[2] = -v2[2];
return (float)M_PI - 2.0f * (float)saasin(len_v3v3(vec, v1) / 2.0f);
}
else
return 2.0f * (float)saasin(len_v3v3(v2, v1) / 2.0f);
}
float angle_normalized_v2v2(const float v1[2], const float v2[2])
{
/* double check they are normalized */
BLI_ASSERT_UNIT_V2(v1);
BLI_ASSERT_UNIT_V2(v2);
/* this is the same as acos(dot_v3v3(v1, v2)), but more accurate */
if (dot_v2v2(v1, v2) < 0.0f) {
float vec[2];
vec[0] = -v2[0];
vec[1] = -v2[1];
return (float)M_PI - 2.0f * saasin(len_v2v2(vec, v1) / 2.0f);
}
else
return 2.0f * (float)saasin(len_v2v2(v2, v1) / 2.0f);
}
/**
* angle between 2 vectors defined by 3 coords, about an axis. */
float angle_on_axis_v3v3v3_v3(const float v1[3], const float v2[3], const float v3[3], const float axis[3])
{
float v1_proj[3], v2_proj[3], tproj[3];
sub_v3_v3v3(v1_proj, v1, v2);
sub_v3_v3v3(v2_proj, v3, v2);
/* project the vectors onto the axis */
project_v3_v3v3(tproj, v1_proj, axis);
sub_v3_v3(v1_proj, tproj);
project_v3_v3v3(tproj, v2_proj, axis);
sub_v3_v3(v2_proj, tproj);
return angle_v3v3(v1_proj, v2_proj);
}
void angle_tri_v3(float angles[3], const float v1[3], const float v2[3], const float v3[3])
{
float ed1[3], ed2[3], ed3[3];
sub_v3_v3v3(ed1, v3, v1);
sub_v3_v3v3(ed2, v1, v2);
sub_v3_v3v3(ed3, v2, v3);
normalize_v3(ed1);
normalize_v3(ed2);
normalize_v3(ed3);
angles[0] = (float)M_PI - angle_normalized_v3v3(ed1, ed2);
angles[1] = (float)M_PI - angle_normalized_v3v3(ed2, ed3);
// face_angles[2] = M_PI - angle_normalized_v3v3(ed3, ed1);
angles[2] = (float)M_PI - (angles[0] + angles[1]);
}
void angle_quad_v3(float angles[4], const float v1[3], const float v2[3], const float v3[3], const float v4[3])
{
float ed1[3], ed2[3], ed3[3], ed4[3];
sub_v3_v3v3(ed1, v4, v1);
sub_v3_v3v3(ed2, v1, v2);
sub_v3_v3v3(ed3, v2, v3);
sub_v3_v3v3(ed4, v3, v4);
normalize_v3(ed1);
normalize_v3(ed2);
normalize_v3(ed3);
normalize_v3(ed4);
angles[0] = (float)M_PI - angle_normalized_v3v3(ed1, ed2);
angles[1] = (float)M_PI - angle_normalized_v3v3(ed2, ed3);
angles[2] = (float)M_PI - angle_normalized_v3v3(ed3, ed4);
angles[3] = (float)M_PI - angle_normalized_v3v3(ed4, ed1);
}
void angle_poly_v3(float *angles, const float *verts[3], int len)
{
int i;
float vec[3][3];
sub_v3_v3v3(vec[2], verts[len - 1], verts[0]);
normalize_v3(vec[2]);
for (i = 0; i < len; i++) {
sub_v3_v3v3(vec[i % 3], verts[i % len], verts[(i + 1) % len]);
normalize_v3(vec[i % 3]);
angles[i] = (float)M_PI - angle_normalized_v3v3(vec[(i + 2) % 3], vec[i % 3]);
}
}
/********************************* Geometry **********************************/
/* Project v1 on v2 */
void project_v2_v2v2(float c[2], const float v1[2], const float v2[2])
{
float mul;
mul = dot_v2v2(v1, v2) / dot_v2v2(v2, v2);
c[0] = mul * v2[0];
c[1] = mul * v2[1];
}
/* Project v1 on v2 */
void project_v3_v3v3(float c[3], const float v1[3], const float v2[3])
{
float mul;
mul = dot_v3v3(v1, v2) / dot_v3v3(v2, v2);
c[0] = mul * v2[0];
c[1] = mul * v2[1];
c[2] = mul * v2[2];
}
/* project a vector on a plane defined by normal and a plane point p */
void project_v3_plane(float v[3], const float n[3], const float p[3])
{
float vector[3];
float mul;
sub_v3_v3v3(vector, v, p);
mul = dot_v3v3(vector, n) / len_squared_v3(n);
mul_v3_v3fl(vector, n, mul);
sub_v3_v3(v, vector);
}
/* Returns a vector bisecting the angle at v2 formed by v1, v2 and v3 */
void bisect_v3_v3v3v3(float out[3], const float v1[3], const float v2[3], const float v3[3])
{
float d_12[3], d_23[3];
sub_v3_v3v3(d_12, v2, v1);
sub_v3_v3v3(d_23, v3, v2);
normalize_v3(d_12);
normalize_v3(d_23);
add_v3_v3v3(out, d_12, d_23);
normalize_v3(out);
}
/* Returns a reflection vector from a vector and a normal vector
* reflect = vec - ((2 * DotVecs(vec, mirror)) * mirror)
*/
void reflect_v3_v3v3(float out[3], const float v1[3], const float v2[3])
{
float vec[3], normal[3];
float reflect[3] = {0.0f, 0.0f, 0.0f};
float dot2;
copy_v3_v3(vec, v1);
copy_v3_v3(normal, v2);
dot2 = 2 * dot_v3v3(vec, normal);
reflect[0] = vec[0] - (dot2 * normal[0]);
reflect[1] = vec[1] - (dot2 * normal[1]);
reflect[2] = vec[2] - (dot2 * normal[2]);
copy_v3_v3(out, reflect);
}
void ortho_basis_v3v3_v3(float v1[3], float v2[3], const float v[3])
{
const float f = (float)sqrt(v[0] * v[0] + v[1] * v[1]);
if (f < 1e-35f) {
// degenerate case
v1[0] = (v[2] < 0.0f) ? -1.0f : 1.0f;
v1[1] = v1[2] = v2[0] = v2[2] = 0.0f;
v2[1] = 1.0f;
}
else {
const float d = 1.0f / f;
v1[0] = v[1] * d;
v1[1] = -v[0] * d;
v1[2] = 0.0f;
v2[0] = -v[2] * v1[1];
v2[1] = v[2] * v1[0];
v2[2] = v[0] * v1[1] - v[1] * v1[0];
}
}
/* Rotate a point p by angle theta around an arbitrary axis r
* http://local.wasp.uwa.edu.au/~pbourke/geometry/
*/
void rotate_normalized_v3_v3v3fl(float r[3], const float p[3], const float axis[3], const float angle)
{
const float costheta = cos(angle);
const float sintheta = sin(angle);
/* double check they are normalized */
BLI_ASSERT_UNIT_V3(axis);
r[0] = ((costheta + (1 - costheta) * axis[0] * axis[0]) * p[0]) +
(((1 - costheta) * axis[0] * axis[1] - axis[2] * sintheta) * p[1]) +
(((1 - costheta) * axis[0] * axis[2] + axis[1] * sintheta) * p[2]);
r[1] = (((1 - costheta) * axis[0] * axis[1] + axis[2] * sintheta) * p[0]) +
((costheta + (1 - costheta) * axis[1] * axis[1]) * p[1]) +
(((1 - costheta) * axis[1] * axis[2] - axis[0] * sintheta) * p[2]);
r[2] = (((1 - costheta) * axis[0] * axis[2] - axis[1] * sintheta) * p[0]) +
(((1 - costheta) * axis[1] * axis[2] + axis[0] * sintheta) * p[1]) +
((costheta + (1 - costheta) * axis[2] * axis[2]) * p[2]);
}
void rotate_v3_v3v3fl(float r[3], const float p[3], const float axis[3], const float angle)
{
float axis_n[3];
normalize_v3_v3(axis_n, axis);
rotate_normalized_v3_v3v3fl(r, p, axis_n, angle);
}
/*********************************** Other ***********************************/
void print_v2(const char *str, const float v[2])
{
printf("%s: %.3f %.3f\n", str, v[0], v[1]);
}
void print_v3(const char *str, const float v[3])
{
printf("%s: %.3f %.3f %.3f\n", str, v[0], v[1], v[2]);
}
void print_v4(const char *str, const float v[4])
{
printf("%s: %.3f %.3f %.3f %.3f\n", str, v[0], v[1], v[2], v[3]);
}
void print_vn(const char *str, const float v[], const int n)
{
int i = 0;
printf("%s[%d]:", str, n);
while (i < n) {
printf(" %.3f", v[i++]);
}
printf("\n");
}
void minmax_v3v3_v3(float min[3], float max[3], const float vec[3])
{
if (min[0] > vec[0]) min[0] = vec[0];
if (min[1] > vec[1]) min[1] = vec[1];
if (min[2] > vec[2]) min[2] = vec[2];
if (max[0] < vec[0]) max[0] = vec[0];
if (max[1] < vec[1]) max[1] = vec[1];
if (max[2] < vec[2]) max[2] = vec[2];
}
void minmax_v2v2_v2(float min[2], float max[2], const float vec[2])
{
if (min[0] > vec[0]) min[0] = vec[0];
if (min[1] > vec[1]) min[1] = vec[1];
if (max[0] < vec[0]) max[0] = vec[0];
if (max[1] < vec[1]) max[1] = vec[1];
}
/** ensure \a v1 is \a dist from \a v2 */
void dist_ensure_v3_v3fl(float v1[3], const float v2[3], const float dist)
{
if (!equals_v3v3(v2, v1)) {
float nor[3];
sub_v3_v3v3(nor, v1, v2);
normalize_v3(nor);
madd_v3_v3v3fl(v1, v2, nor, dist);
}
}
void dist_ensure_v2_v2fl(float v1[2], const float v2[2], const float dist)
{
if (!equals_v2v2(v2, v1)) {
float nor[2];
sub_v2_v2v2(nor, v1, v2);
normalize_v2(nor);
madd_v2_v2v2fl(v1, v2, nor, dist);
}
}
void axis_sort_v3(const float axis_values[3], int r_axis_order[3])
{
float v[3];
copy_v3_v3(v, axis_values);
#define SWAP_AXIS(a, b) { \
SWAP(float, v[a], v[b]); \
SWAP(int, r_axis_order[a], r_axis_order[b]); \
} (void)0
if (v[0] < v[1]) {
if (v[2] < v[0]) { SWAP_AXIS(0, 2); }
}
else {
if (v[1] < v[2]) { SWAP_AXIS(0, 1); }
else { SWAP_AXIS(0, 2); }
}
if (v[2] < v[1]) { SWAP_AXIS(1, 2); }
#undef SWAP_AXIS
}
/***************************** Array Functions *******************************/
double dot_vn_vn(const float *array_src_a, const float *array_src_b, const int size)
{
double d = 0.0f;
const float *array_pt_a = array_src_a + (size - 1);
const float *array_pt_b = array_src_b + (size - 1);
int i = size;
while (i--) {
d += (double)(*(array_pt_a--) * *(array_pt_b--));
}
return d;
}
float normalize_vn_vn(float *array_tar, const float *array_src, const int size)
{
double d = dot_vn_vn(array_tar, array_src, size);
float d_sqrt;
if (d > 1.0e-35) {
d_sqrt = (float)sqrt(d);
mul_vn_vn_fl(array_tar, array_src, size, 1.0f / d_sqrt);
}
else {
fill_vn_fl(array_tar, size, 0.0f);
d_sqrt = 0.0f;
}
return d_sqrt;
}
float normalize_vn(float *array_tar, const int size)
{
return normalize_vn_vn(array_tar, array_tar, size);
}
void range_vn_i(int *array_tar, const int size, const int start)
{
int *array_pt = array_tar + (size - 1);
int j = start + (size - 1);
int i = size;
while (i--) {
*(array_pt--) = j--;
}
}
void range_vn_fl(float *array_tar, const int size, const float start, const float step)
{
float *array_pt = array_tar + (size - 1);
int i = size;
while (i--) {
*(array_pt--) = start + step * (float)(i);
}
}
void negate_vn(float *array_tar, const int size)
{
float *array_pt = array_tar + (size - 1);
int i = size;
while (i--) {
*(array_pt--) *= -1.0f;
}
}
void negate_vn_vn(float *array_tar, const float *array_src, const int size)
{
float *tar = array_tar + (size - 1);
const float *src = array_src + (size - 1);
int i = size;
while (i--) {
*(tar--) = -*(src--);
}
}
void mul_vn_fl(float *array_tar, const int size, const float f)
{
float *array_pt = array_tar + (size - 1);
int i = size;
while (i--) {
*(array_pt--) *= f;
}
}
void mul_vn_vn_fl(float *array_tar, const float *array_src, const int size, const float f)
{
float *tar = array_tar + (size - 1);
const float *src = array_src + (size - 1);
int i = size;
while (i--) {
*(tar--) = *(src--) * f;
}
}
void add_vn_vn(float *array_tar, const float *array_src, const int size)
{
float *tar = array_tar + (size - 1);
const float *src = array_src + (size - 1);
int i = size;
while (i--) {
*(tar--) += *(src--);
}
}
void add_vn_vnvn(float *array_tar, const float *array_src_a, const float *array_src_b, const int size)
{
float *tar = array_tar + (size - 1);
const float *src_a = array_src_a + (size - 1);
const float *src_b = array_src_b + (size - 1);
int i = size;
while (i--) {
*(tar--) = *(src_a--) + *(src_b--);
}
}
void madd_vn_vn(float *array_tar, const float *array_src, const float f, const int size)
{
float *tar = array_tar + (size - 1);
const float *src = array_src + (size - 1);
int i = size;
while (i--) {
*(tar--) += *(src--) * f;
}
}
void madd_vn_vnvn(float *array_tar, const float *array_src_a, const float *array_src_b, const float f, const int size)
{
float *tar = array_tar + (size - 1);
const float *src_a = array_src_a + (size - 1);
const float *src_b = array_src_b + (size - 1);
int i = size;
while (i--) {
*(tar--) = *(src_a--) + (*(src_b--) * f);
}
}
void sub_vn_vn(float *array_tar, const float *array_src, const int size)
{
float *tar = array_tar + (size - 1);
const float *src = array_src + (size - 1);
int i = size;
while (i--) {
*(tar--) -= *(src--);
}
}
void sub_vn_vnvn(float *array_tar, const float *array_src_a, const float *array_src_b, const int size)
{
float *tar = array_tar + (size - 1);
const float *src_a = array_src_a + (size - 1);
const float *src_b = array_src_b + (size - 1);
int i = size;
while (i--) {
*(tar--) = *(src_a--) - *(src_b--);
}
}
void msub_vn_vn(float *array_tar, const float *array_src, const float f, const int size)
{
float *tar = array_tar + (size - 1);
const float *src = array_src + (size - 1);
int i = size;
while (i--) {
*(tar--) -= *(src--) * f;
}
}
void msub_vn_vnvn(float *array_tar, const float *array_src_a, const float *array_src_b, const float f, const int size)
{
float *tar = array_tar + (size - 1);
const float *src_a = array_src_a + (size - 1);
const float *src_b = array_src_b + (size - 1);
int i = size;
while (i--) {
*(tar--) = *(src_a--) - (*(src_b--) * f);
}
}
void interp_vn_vn(float *array_tar, const float *array_src, const float t, const int size)
{
const float s = 1.0f - t;
float *tar = array_tar + (size - 1);
const float *src = array_src + (size - 1);
int i = size;
while (i--) {
*(tar) = (s * *(tar)) + (t * *(src));
tar--;
src--;
}
}
void fill_vn_i(int *array_tar, const int size, const int val)
{
int *tar = array_tar + (size - 1);
int i = size;
while (i--) {
*(tar--) = val;
}
}
void fill_vn_ushort(unsigned short *array_tar, const int size, const unsigned short val)
{
unsigned short *tar = array_tar + (size - 1);
int i = size;
while (i--) {
*(tar--) = val;
}
}
void fill_vn_fl(float *array_tar, const int size, const float val)
{
float *tar = array_tar + (size - 1);
int i = size;
while (i--) {
*(tar--) = val;
}
}
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