BLI_quadric.h

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/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once

 
#include <stdbool.h>
 
typedef struct Quadric {
  double a2, ab, ac, ad, b2, bc, bd, c2, cd, d2;
} Quadric;
 
/* Conversion. */
 
void BLI_quadric_from_plane(Quadric *q, const double v[4]);
void BLI_quadric_to_vector_v3(const Quadric *q, double v[3]);
 
void BLI_quadric_clear(Quadric *q);
 
/* Math operations. */
 
void BLI_quadric_add_qu_qu(Quadric *a, const Quadric *b);
void BLI_quadric_add_qu_ququ(Quadric *r, const Quadric *a, const Quadric *b);
void BLI_quadric_mul(Quadric *a, double scalar);
 
/* Solve. */
 
double BLI_quadric_evaluate(const Quadric *q, const double v[3]);
bool BLI_quadric_optimize(const Quadric *q, double v[3], double epsilon);