forked from enlightenment/efl
155 lines
3.8 KiB
Plaintext
155 lines
3.8 KiB
Plaintext
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/* EINA - EFL data type library
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* Copyright (C) 2016 Cedric Bail
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EINA_INLINE_VECTOR_X_
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#define EINA_INLINE_VECTOR_X_
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static inline void
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eina_vector2_set(Eina_Vector2 *dst, double x, double y)
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{
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dst->x = x;
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dst->y = y;
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}
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static inline void
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eina_vector2_array_set(Eina_Vector2 *dst, const double *v)
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{
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dst->x = v[0];
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dst->y = v[1];
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}
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static inline void
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eina_vector2_copy(Eina_Vector2 *dst, const Eina_Vector2 *src)
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{
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dst->x = src->x;
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dst->y = src->y;
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}
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static inline void
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eina_vector2_negate(Eina_Vector2 *out, const Eina_Vector2 *v)
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{
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out->x = -v->x;
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out->y = -v->y;
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}
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static inline void
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eina_vector2_add(Eina_Vector2 *out, const Eina_Vector2 *a,
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const Eina_Vector2 *b)
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{
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out->x = a->x + b->x;
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out->y = a->y + b->y;
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}
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static inline void
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eina_vector2_subtract(Eina_Vector2 *out, const Eina_Vector2 *a,
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const Eina_Vector2 *b)
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{
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out->x = a->x - b->x;
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out->y = a->y - b->y;
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}
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static inline void
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eina_vector2_scale(Eina_Vector2 *out, const Eina_Vector2 *v, double scale)
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{
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out->x = scale * v->x;
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out->y = scale * v->y;
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}
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static inline double
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eina_vector2_dot_product(const Eina_Vector2 *a, const Eina_Vector2 *b)
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{
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return (a->x * b->x) + (a->y * b->y);
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}
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static inline double
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eina_vector2_length_get(const Eina_Vector2 *v)
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{
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return sqrt((v->x * v->x) + (v->y * v->y));
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}
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static inline double
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eina_vector2_length_square_get(const Eina_Vector2 *v)
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{
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return (v->x * v->x) + (v->y * v->y);
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}
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static inline double
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eina_vector2_distance_get(const Eina_Vector2 *a, const Eina_Vector2 *b)
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{
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Eina_Vector2 v;
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eina_vector2_subtract(&v, a, b);
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return eina_vector2_length_get(&v);
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}
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static inline double
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eina_vector2_distance_square_get(const Eina_Vector2 *a, const Eina_Vector2 *b)
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{
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Eina_Vector2 v;
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eina_vector2_subtract(&v, a, b);
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return eina_vector2_length_square_get(&v);
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}
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static inline void
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eina_vector2_normalize(Eina_Vector2 *out, const Eina_Vector2 *v)
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{
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/* Assume "v" is not a zero vector */
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eina_vector2_scale(out, v, 1.0 / eina_vector2_length_get(v));
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}
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static inline void
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eina_vector2_transform(Eina_Vector2 *out, const Eina_Matrix2 *m,
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const Eina_Vector2 *v)
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{
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Eina_Vector2 tmp;
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tmp.x = (m->xx * v->x) + (m->yx * v->y);
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tmp.y = (m->xy * v->x) + (m->yy * v->y);
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eina_vector2_copy(out, &tmp);
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}
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static inline void
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eina_vector2_homogeneous_position_transform(Eina_Vector2 *out,
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const Eina_Matrix3 *m,
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const Eina_Vector2 *v)
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{
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Eina_Vector2 tmp;
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tmp.x = (m->xx * v->x) + (m->yx * v->y) + m->zx;
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tmp.y = (m->xy * v->x) + (m->yy * v->y) + m->zy;
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eina_vector2_scale(out, &tmp, 1.0 / ((m->xz * v->x) + (m->yz * v->y) + m->zz));
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}
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static inline void
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eina_vector2_homogeneous_direction_transform(Eina_Vector2 *out,
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const Eina_Matrix3 *m,
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const Eina_Vector2 *v)
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{
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Eina_Vector2 tmp;
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tmp.x = (m->xx * v->x) + (m->yx * v->y);
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tmp.y = (m->xy * v->x) + (m->yy * v->y);
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eina_vector2_copy(out, &tmp);
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}
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#endif
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