eb10402365
Problem was that area calculation of polygons was done relative to the xy plane, and with a very obscure (to me at least) algorithm. That meant that vertical ngons would get 0 area. Commented initial code in case this is a strange optimization case that someone wants to use and used a cleaner algorithm: first project vertices to the ngon plane, defined by the normal of the ngon and the center (mean) of the ngon vertices. This will only be exact for convex and mostly planar ngons, still it is much better than the previous code. Also fixed memory leak when stretch display was on.
236 lines
11 KiB
C
236 lines
11 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: some of this file.
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*
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* ***** END GPL LICENSE BLOCK *****
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* */
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#ifndef __BLI_MATH_VECTOR_H__
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#define __BLI_MATH_VECTOR_H__
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/** \file BLI_math_vector.h
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* \ingroup bli
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "BLI_math_inline.h"
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#ifdef __BLI_MATH_INLINE_H__
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#include "intern/math_vector_inline.c"
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#endif
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/************************************* Init ***********************************/
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MINLINE void zero_v2(float r[2]);
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MINLINE void zero_v3(float r[3]);
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MINLINE void zero_v4(float r[4]);
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MINLINE void copy_v2_v2(float r[2], const float a[2]);
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MINLINE void copy_v3_v3(float r[3], const float a[3]);
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MINLINE void copy_v4_v4(float r[4], const float a[4]);
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MINLINE void copy_v2_fl(float r[2], float f);
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MINLINE void copy_v3_fl(float r[3], float f);
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MINLINE void copy_v4_fl(float r[4], float f);
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MINLINE void swap_v2_v2(float a[2], float b[2]);
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MINLINE void swap_v3_v3(float a[3], float b[3]);
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MINLINE void swap_v4_v4(float a[4], float b[4]);
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/* char */
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MINLINE void copy_v2_v2_char(char r[2], const char a[2]);
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MINLINE void copy_v3_v3_char(char r[3], const char a[3]);
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MINLINE void copy_v4_v4_char(char r[4], const char a[4]);
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/* short */
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MINLINE void copy_v2_v2_short(short r[2], const short a[2]);
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MINLINE void copy_v3_v3_short(short r[3], const short a[3]);
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MINLINE void copy_v4_v4_short(short r[4], const short a[4]);
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/* int */
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MINLINE void copy_v2_v2_int(int r[2], const int a[2]);
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MINLINE void copy_v3_v3_int(int r[3], const int a[3]);
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MINLINE void copy_v4_v4_int(int r[4], const int a[4]);
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/* double -> float */
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MINLINE void copy_v2fl_v2db(float r[2], const double a[2]);
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MINLINE void copy_v3fl_v3db(float r[3], const double a[3]);
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MINLINE void copy_v4fl_v4db(float r[4], const double a[4]);
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/* float -> double */
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MINLINE void copy_v2db_v2fl(double r[2], const float a[2]);
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MINLINE void copy_v3db_v3fl(double r[3], const float a[3]);
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MINLINE void copy_v4db_v4fl(double r[4], const float a[4]);
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/********************************* Arithmetic ********************************/
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MINLINE void add_v3_fl(float r[3], float f);
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MINLINE void add_v4_fl(float r[4], float f);
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MINLINE void add_v2_v2(float r[2], const float a[2]);
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MINLINE void add_v2_v2v2(float r[2], const float a[2], const float b[2]);
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MINLINE void add_v3_v3(float r[3], const float a[3]);
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MINLINE void add_v3_v3v3(float r[3], const float a[3], const float b[3]);
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MINLINE void sub_v2_v2(float r[2], const float a[2]);
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MINLINE void sub_v2_v2v2(float r[2], const float a[2], const float b[2]);
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MINLINE void sub_v3_v3(float r[3], const float a[3]);
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MINLINE void sub_v3_v3v3(float r[3], const float a[3], const float b[3]);
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MINLINE void sub_v4_v4(float r[4], const float a[4]);
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MINLINE void sub_v4_v4v4(float r[4], const float a[4], const float b[4]);
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MINLINE void mul_v2_fl(float r[2], float f);
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MINLINE void mul_v2_v2fl(float r[2], const float a[2], float f);
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MINLINE void mul_v3_fl(float r[3], float f);
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MINLINE void mul_v3_v3fl(float r[3], const float a[3], float f);
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MINLINE void mul_v2_v2(float r[2], const float a[2]);
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MINLINE void mul_v3_v3(float r[3], const float a[3]);
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MINLINE void mul_v3_v3v3(float r[3], const float a[3], const float b[3]);
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MINLINE void mul_v4_fl(float r[4], float f);
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MINLINE void madd_v3_v3fl(float r[3], const float a[3], float f);
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MINLINE void madd_v3_v3v3(float r[3], const float a[3], const float b[3]);
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MINLINE void madd_v2_v2v2fl(float r[2], const float a[2], const float b[2], float f);
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MINLINE void madd_v3_v3v3fl(float r[3], const float a[3], const float b[3], float f);
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MINLINE void madd_v3_v3v3v3(float r[3], const float a[3], const float b[3], const float c[3]);
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MINLINE void madd_v4_v4fl(float r[4], const float a[4], float f);
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MINLINE void negate_v2(float r[2]);
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MINLINE void negate_v2_v2(float r[2], const float a[2]);
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MINLINE void negate_v3(float r[3]);
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MINLINE void negate_v3_v3(float r[3], const float a[3]);
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MINLINE void negate_v4(float r[4]);
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MINLINE void negate_v4_v4(float r[4], const float a[3]);
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MINLINE float dot_v2v2(const float a[2], const float b[2]);
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MINLINE float dot_v3v3(const float a[3], const float b[3]);
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MINLINE float cross_v2v2(const float a[2], const float b[2]);
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MINLINE void cross_v3_v3v3(float r[3], const float a[3], const float b[3]);
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MINLINE void star_m3_v3(float rmat[3][3],float a[3]);
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/*********************************** Length **********************************/
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MINLINE float len_squared_v2(const float v[2]);
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MINLINE float len_squared_v3(const float v[3]);
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MINLINE float len_v2(const float a[2]);
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MINLINE float len_v2v2(const float a[2], const float b[2]);
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MINLINE float len_squared_v2v2(const float a[2], const float b[2]);
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MINLINE float len_v3(const float a[3]);
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MINLINE float len_v3v3(const float a[3], const float b[3]);
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MINLINE float len_squared_v3v3(const float a[3], const float b[3]);
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MINLINE float normalize_v2(float r[2]);
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MINLINE float normalize_v2_v2(float r[2], const float a[2]);
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MINLINE float normalize_v3(float r[3]);
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MINLINE float normalize_v3_v3(float r[3], const float a[3]);
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/******************************* Interpolation *******************************/
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void interp_v2_v2v2(float r[2], const float a[2], const float b[2], const float t);
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void interp_v2_v2v2v2(float r[2], const float a[2], const float b[2], const float c[3], const float t[3]);
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void interp_v3_v3v3(float r[3], const float a[3], const float b[3], const float t);
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void interp_v3_v3v3v3(float p[3], const float v1[3], const float v2[3], const float v3[3], const float w[3]);
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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]);
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void interp_v4_v4v4(float r[4], const float a[4], const float b[4], const float t);
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void interp_v4_v4v4v4(float p[4], const float v1[4], const float v2[4], const float v3[4], const float w[3]);
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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]);
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void mid_v3_v3v3(float r[3], const float a[3], const float b[3]);
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/********************************* Comparison ********************************/
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MINLINE int is_zero_v3(const float a[3]);
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MINLINE int is_zero_v4(const float a[4]);
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MINLINE int is_one_v3(const float a[3]);
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MINLINE int equals_v2v2(const float v1[2], const float v2[2]);
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MINLINE int equals_v3v3(const float a[3], const float b[3]);
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MINLINE int compare_v3v3(const float a[3], const float b[3], const float limit);
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MINLINE int compare_len_v3v3(const float a[3], const float b[3], const float limit);
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MINLINE int compare_v4v4(const float a[4], const float b[4], const float limit);
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MINLINE int equals_v4v4(const float a[4], const float b[4]);
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MINLINE float line_point_side_v2(const float l1[2], const float l2[2], const float pt[2]);
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/********************************** Angles ***********************************/
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/* - angle with 2 arguments is angle between vector */
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/* - angle with 3 arguments is angle between 3 points at the middle point */
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/* - angle_normalized_* is faster equivalent if vectors are normalized */
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float angle_v2v2(const float a[2], const float b[2]);
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float angle_signed_v2v2(const float v1[2], const float v2[2]);
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float angle_v2v2v2(const float a[2], const float b[2], const float c[2]);
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float angle_normalized_v2v2(const float a[2], const float b[2]);
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float angle_v3v3(const float a[3], const float b[3]);
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float angle_v3v3v3(const float a[3], const float b[3], const float c[3]);
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float angle_normalized_v3v3(const float v1[3], const float v2[3]);
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void angle_tri_v3(float angles[3], const float v1[3], const float v2[3], const float v3[3]);
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void angle_quad_v3(float angles[4], const float v1[3], const float v2[3], const float v3[3], const float v4[3]);
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void angle_poly_v3(float* angles, const float* verts[3], int len);
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/********************************* Geometry **********************************/
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void project_v2_v2v2(float c[2], const float v1[2], const float v2[2]);
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void project_v3_v3v3(float r[3], const float p[3], const float n[3]);
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void project_v3_plane(float v[3], const float n[3], const float p[3]);
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void reflect_v3_v3v3(float r[3], const float v[3], const float n[3]);
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void ortho_basis_v3v3_v3(float r1[3], float r2[3], const float a[3]);
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void bisect_v3_v3v3v3(float r[3], const float a[3], const float b[3], const float c[3]);
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void rotate_v3_v3v3fl(float v[3], const float p[3], const float axis[3], const float angle);
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void rotate_normalized_v3_v3v3fl(float v[3], const float p[3], const float axis[3], const float angle);
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/*********************************** Other ***********************************/
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void print_v2(const char *str, const float a[2]);
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void print_v3(const char *str, const float a[3]);
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void print_v4(const char *str, const float a[4]);
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MINLINE void normal_short_to_float_v3(float r[3], const short n[3]);
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MINLINE void normal_float_to_short_v3(short r[3], const float n[3]);
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void minmax_v3v3_v3(float min[3], float max[3], const float vec[3]);
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/***************************** Array Functions *******************************/
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/* attempted to follow fixed length vertex functions. names could be improved*/
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double dot_vn_vn(const float *array_src_a, const float *array_src_b, const int size);
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float normalize_vn_vn(float *array_tar, const float *array_src, const int size);
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float normalize_vn(float *array_tar, const int size);
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void range_vn_i(int *array_tar, const int size, const int start);
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void range_vn_fl(float *array_tar, const int size, const float start, const float step);
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void negate_vn(float *array_tar, const int size);
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void negate_vn_vn(float *array_tar, const float *array_src, const int size);
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void mul_vn_fl(float *array_tar, const int size, const float f);
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void mul_vn_vn_fl(float *array_tar, const float *array_src, const int size, const float f);
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void add_vn_vn(float *array_tar, const float *array_src, const int size);
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void add_vn_vnvn(float *array_tar, const float *array_src_a, const float *array_src_b, const int size);
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void sub_vn_vn(float *array_tar, const float *array_src, const int size);
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void sub_vn_vnvn(float *array_tar, const float *array_src_a, const float *array_src_b, const int size);
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void fill_vn_i(int *array_tar, const int size, const int val);
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void fill_vn_fl(float *array_tar, const int size, const float val);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __BLI_MATH_VECTOR_H__ */
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