Imported Upstream version 0.13.2+dsfg1

libobs/graphics/plane.h

@@ -0,0 +1,101 @@
+/******************************************************************************
+    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