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- /******************************************************************************
- Copyright (C) 2023 by Lain Bailey <lain@obsproject.com>
- 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, see <http://www.gnu.org/licenses/>.
- ******************************************************************************/
- #pragma once
- #include "../util/c99defs.h"
- #include <math.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- struct vec2 {
- union {
- struct {
- float x, y;
- };
- float ptr[2];
- };
- };
- static inline void vec2_zero(struct vec2 *dst)
- {
- dst->x = 0.0f;
- dst->y = 0.0f;
- }
- static inline void vec2_set(struct vec2 *dst, float x, float y)
- {
- dst->x = x;
- dst->y = y;
- }
- static inline void vec2_copy(struct vec2 *dst, const struct vec2 *v)
- {
- dst->x = v->x;
- dst->y = v->y;
- }
- static inline void vec2_add(struct vec2 *dst, const struct vec2 *v1, const struct vec2 *v2)
- {
- vec2_set(dst, v1->x + v2->x, v1->y + v2->y);
- }
- static inline void vec2_sub(struct vec2 *dst, const struct vec2 *v1, const struct vec2 *v2)
- {
- vec2_set(dst, v1->x - v2->x, v1->y - v2->y);
- }
- static inline void vec2_mul(struct vec2 *dst, const struct vec2 *v1, const struct vec2 *v2)
- {
- vec2_set(dst, v1->x * v2->x, v1->y * v2->y);
- }
- static inline void vec2_div(struct vec2 *dst, const struct vec2 *v1, const struct vec2 *v2)
- {
- vec2_set(dst, v1->x / v2->x, v1->y / v2->y);
- }
- static inline void vec2_addf(struct vec2 *dst, const struct vec2 *v, float f)
- {
- vec2_set(dst, v->x + f, v->y + f);
- }
- static inline void vec2_subf(struct vec2 *dst, const struct vec2 *v, float f)
- {
- vec2_set(dst, v->x - f, v->y - f);
- }
- static inline void vec2_mulf(struct vec2 *dst, const struct vec2 *v, float f)
- {
- vec2_set(dst, v->x * f, v->y * f);
- }
- static inline void vec2_divf(struct vec2 *dst, const struct vec2 *v, float f)
- {
- vec2_set(dst, v->x / f, v->y / f);
- }
- static inline void vec2_neg(struct vec2 *dst, const struct vec2 *v)
- {
- vec2_set(dst, -v->x, -v->y);
- }
- static inline float vec2_dot(const struct vec2 *v1, const struct vec2 *v2)
- {
- return v1->x * v2->x + v1->y * v2->y;
- }
- static inline float vec2_len(const struct vec2 *v)
- {
- return sqrtf(v->x * v->x + v->y * v->y);
- }
- static inline float vec2_dist(const struct vec2 *v1, const struct vec2 *v2)
- {
- struct vec2 temp;
- vec2_sub(&temp, v1, v2);
- return vec2_len(&temp);
- }
- static inline void vec2_minf(struct vec2 *dst, const struct vec2 *v, float val)
- {
- dst->x = (v->x < val) ? v->x : val;
- dst->y = (v->y < val) ? v->y : val;
- }
- static inline void vec2_min(struct vec2 *dst, const struct vec2 *v, const struct vec2 *min_v)
- {
- dst->x = (v->x < min_v->x) ? v->x : min_v->x;
- dst->y = (v->y < min_v->y) ? v->y : min_v->y;
- }
- static inline void vec2_maxf(struct vec2 *dst, const struct vec2 *v, float val)
- {
- dst->x = (v->x > val) ? v->x : val;
- dst->y = (v->y > val) ? v->y : val;
- }
- static inline void vec2_max(struct vec2 *dst, const struct vec2 *v, const struct vec2 *max_v)
- {
- dst->x = (v->x > max_v->x) ? v->x : max_v->x;
- dst->y = (v->y > max_v->y) ? v->y : max_v->y;
- }
- EXPORT void vec2_abs(struct vec2 *dst, const struct vec2 *v);
- EXPORT void vec2_floor(struct vec2 *dst, const struct vec2 *v);
- EXPORT void vec2_ceil(struct vec2 *dst, const struct vec2 *v);
- EXPORT int vec2_close(const struct vec2 *v1, const struct vec2 *v2, float epsilon);
- EXPORT void vec2_norm(struct vec2 *dst, const struct vec2 *v);
- #ifdef __cplusplus
- }
- #endif
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