102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/******************************************************************************
|
|
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.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 "math-defs.h"
|
|
#include "vec3.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct matrix3;
|
|
struct matrix4;
|
|
|
|
struct plane {
|
|
struct vec3 dir;
|
|
float dist;
|
|
};
|
|
|
|
static inline void plane_copy(struct plane *dst, const struct plane *p)
|
|
{
|
|
vec3_copy(&dst->dir, &p->dir);
|
|
dst->dist = p->dist;
|
|
}
|
|
|
|
static inline void plane_set(struct plane *dst, const struct vec3 *dir,
|
|
float dist)
|
|
{
|
|
vec3_copy(&dst->dir, dir);
|
|
dst->dist = dist;
|
|
}
|
|
|
|
static inline void plane_setf(struct plane *dst, float a, float b, float c,
|
|
float d)
|
|
{
|
|
vec3_set(&dst->dir, a, b, c);
|
|
dst->dist = d;
|
|
}
|
|
|
|
EXPORT void plane_from_tri(struct plane *dst,
|
|
const struct vec3 *v1,
|
|
const struct vec3 *v2,
|
|
const struct vec3 *v3);
|
|
|
|
EXPORT void plane_transform(struct plane *dst, const struct plane *p,
|
|
const struct matrix4 *m);
|
|
EXPORT void plane_transform3x4(struct plane *dst, const struct plane *p,
|
|
const struct matrix3 *m);
|
|
|
|
EXPORT bool plane_intersection_ray(const struct plane *p,
|
|
const struct vec3 *orig, const struct vec3 *dir, float *t);
|
|
EXPORT bool plane_intersection_line(const struct plane *p,
|
|
const struct vec3 *v1, const struct vec3 *v2, float *t);
|
|
|
|
EXPORT bool plane_tri_inside(const struct plane *p,
|
|
const struct vec3 *v1,
|
|
const struct vec3 *v2,
|
|
const struct vec3 *v3,
|
|
float precision);
|
|
|
|
EXPORT bool plane_line_inside(const struct plane *p, const struct vec3 *v1,
|
|
const struct vec3 *v2, float precision);
|
|
|
|
static inline bool plane_close(const struct plane *p1, const struct plane *p2,
|
|
float precision)
|
|
{
|
|
return vec3_close(&p1->dir, &p2->dir, precision) &&
|
|
close_float(p1->dist, p2->dist, precision);
|
|
}
|
|
|
|
static inline bool plane_coplanar(const struct plane *p1,
|
|
const struct plane *p2, float precision)
|
|
{
|
|
float cos_angle = vec3_dot(&p1->dir, &p2->dir);
|
|
|
|
if (close_float(cos_angle, 1.0f, precision))
|
|
return close_float(p1->dist, p2->dist, precision);
|
|
else if (close_float(cos_angle, -1.0f, precision))
|
|
return close_float(-p1->dist, p2->dist, precision);
|
|
|
|
return false;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|