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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"
- /*
- * A few general math functions that I couldn't really decide where to put.
- *
- * Polar/Cart conversion, torque functions (for smooth movement), percentage,
- * random floats.
- */
- #ifdef __cplusplus
- extern "C" {
- #endif
- struct vec2;
- struct vec3;
- EXPORT void polar_to_cart(struct vec3 *dst, const struct vec3 *v);
- EXPORT void cart_to_polar(struct vec3 *dst, const struct vec3 *v);
- EXPORT void norm_to_polar(struct vec2 *dst, const struct vec3 *norm);
- EXPORT void polar_to_norm(struct vec3 *dst, const struct vec2 *polar);
- EXPORT float calc_torquef(float val1, float val2, float torque, float min_adjust, float t);
- EXPORT void calc_torque(struct vec3 *dst, const struct vec3 *v1, const struct vec3 *v2, float torque, float min_adjust,
- float t);
- static inline float get_percentage(float start, float end, float mid)
- {
- return (mid - start) / (end - start);
- }
- static inline float get_percentagei(int start, int end, int mid)
- {
- return (float)(mid - start) / (float)(end - start);
- }
- EXPORT float rand_float(int positive_only);
- #ifdef __cplusplus
- }
- #endif
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