169 lines
3.8 KiB
C
169 lines
3.8 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#pragma once
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#include "../util/c99defs.h"
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#include <math.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct vec2 {
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union {
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struct {
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float x, y;
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};
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float ptr[2];
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};
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};
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static inline void vec2_zero(struct vec2 *dst)
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{
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dst->x = 0.0f;
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dst->y = 0.0f;
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}
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static inline void vec2_set(struct vec2 *dst, float x, float 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 vec2_copy(struct vec2 *dst, const struct vec2 *v)
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{
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dst->x = v->x;
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dst->y = v->y;
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}
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static inline void vec2_add(struct vec2 *dst, const struct vec2 *v1,
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const struct vec2 *v2)
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{
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vec2_set(dst, v1->x+v2->x, v1->y+v2->y);
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}
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static inline void vec2_sub(struct vec2 *dst, const struct vec2 *v1,
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const struct vec2 *v2)
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{
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vec2_set(dst, v1->x-v2->x, v1->y-v2->y);
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}
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static inline void vec2_mul(struct vec2 *dst, const struct vec2 *v1,
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const struct vec2 *v2)
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{
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vec2_set(dst, v1->x*v2->x, v1->y*v2->y);
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}
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static inline void vec2_div(struct vec2 *dst, const struct vec2 *v1,
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const struct vec2 *v2)
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{
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vec2_set(dst, v1->x/v2->x, v1->y/v2->y);
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}
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static inline void vec2_addf(struct vec2 *dst, const struct vec2 *v,
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float f)
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{
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vec2_set(dst, v->x+f, v->y+f);
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}
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static inline void vec2_subf(struct vec2 *dst, const struct vec2 *v,
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float f)
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{
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vec2_set(dst, v->x-f, v->y-f);
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}
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static inline void vec2_mulf(struct vec2 *dst, const struct vec2 *v,
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float f)
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{
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vec2_set(dst, v->x*f, v->y*f);
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}
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static inline void vec2_divf(struct vec2 *dst, const struct vec2 *v,
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float f)
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{
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vec2_set(dst, v->x/f, v->y/f);
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}
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static inline void vec2_neg(struct vec2 *dst, const struct vec2 *v)
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{
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vec2_set(dst, -v->x, -v->y);
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}
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static inline float vec2_dot(const struct vec2 *v1, const struct vec2 *v2)
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{
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return (v1->x+v2->x) * (v1->y+v2->y);
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}
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static inline float vec2_len(const struct vec2 *v)
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{
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return sqrtf(v->x*v->x + v->y*v->y);
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}
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static inline float vec2_dist(const struct vec2 *v1, const struct vec2 *v2)
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{
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struct vec2 temp;
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vec2_sub(&temp, v1, v2);
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return vec2_len(&temp);
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}
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static inline void vec2_minf(struct vec2 *dst, const struct vec2 *v,
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float val)
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{
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if (v->x < val)
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dst->x = val;
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if (v->y < val)
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dst->y = val;
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}
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static inline void vec2_min(struct vec2 *dst, const struct vec2 *v,
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const struct vec2 *min_v)
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{
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if (v->x < min_v->x)
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dst->x = min_v->x;
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if (v->y < min_v->y)
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dst->y = min_v->y;
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}
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static inline void vec2_maxf(struct vec2 *dst, const struct vec2 *v,
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float val)
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{
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if (v->x > val)
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dst->x = val;
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if (v->y > val)
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dst->y = val;
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}
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static inline void vec2_max(struct vec2 *dst, const struct vec2 *v,
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const struct vec2 *max_v)
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{
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if (v->x > max_v->x)
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dst->x = max_v->x;
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if (v->y > max_v->y)
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dst->y = max_v->y;
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}
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EXPORT void vec2_abs(struct vec2 *dst, const struct vec2 *v);
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EXPORT void vec2_floor(struct vec2 *dst, const struct vec2 *v);
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EXPORT void vec2_ceil(struct vec2 *dst, const struct vec2 *v);
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EXPORT int vec2_close(const struct vec2 *v1, const struct vec2 *v2,
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float epsilon);
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EXPORT void vec2_norm(struct vec2 *dst, const struct vec2 *v);
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#ifdef __cplusplus
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}
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#endif
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