Imported Upstream version 0.13.2+dsfg1

libobs/graphics/bounds.h

@@ -0,0 +1,137 @@
+/******************************************************************************
+    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"
+
+/*
+ * Axis Aligned Bounding Box
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BOUNDS_MAX_X 1
+#define BOUNDS_MAX_Y 2
+#define BOUNDS_MAX_Z 4
+
+#define BOUNDS_OUTSIDE 1
+#define BOUNDS_INSIDE  2
+#define BOUNDS_PARTIAL 3
+
+struct bounds {
+	struct vec3 min, max;
+};
+
+static inline void bounds_zero(struct bounds *dst)
+{
+	vec3_zero(&dst->min);
+	vec3_zero(&dst->max);
+}
+
+static inline void bounds_copy(struct bounds *dst, const struct bounds *b)
+{
+	vec3_copy(&dst->min, &b->min);
+	vec3_copy(&dst->max, &b->max);
+}
+
+EXPORT void bounds_move(struct bounds *dst, const struct bounds *b,
+		const struct vec3 *v);
+
+EXPORT void bounds_scale(struct bounds *dst, const struct bounds *b,
+		const struct vec3 *v);
+
+EXPORT void bounds_merge(struct bounds *dst, const struct bounds *b1,
+		const struct bounds *b2);
+EXPORT void bounds_merge_point(struct bounds *dst, const struct bounds *b,
+		const struct vec3 *v);
+
+EXPORT void bounds_get_point(struct vec3 *dst, const struct bounds *b,
+		unsigned int i);
+EXPORT void bounds_get_center(struct vec3 *dst, const struct bounds *b);
+
+/**
+ * Note: transforms as OBB, then converts back to AABB, which can result in
+ * the actual size becoming larger than it originally was.
+ */
+EXPORT void bounds_transform(struct bounds *dst, const struct bounds *b,
+		const struct matrix4 *m);
+EXPORT void bounds_transform3x4(struct bounds *dst, const struct bounds *b,
+		const struct matrix3 *m);
+
+EXPORT bool bounds_intersection_ray(const struct bounds *b,
+		const struct vec3 *orig, const struct vec3 *dir, float *t);
+EXPORT bool bounds_intersection_line(const struct bounds *b,
+		const struct vec3 *p1, const struct vec3 *p2, float *t);
+
+EXPORT bool bounds_plane_test(const struct bounds *b, const struct plane *p);
+EXPORT bool bounds_under_plane(const struct bounds *b,
+		const struct plane *p);
+
+static inline bool bounds_inside(const struct bounds *b,
+		const struct bounds *test)
+{
+	return test->min.x >= b->min.x &&
+	       test->min.y >= b->min.y &&
+	       test->min.z >= b->min.z &&
+	       test->max.x <= b->max.x &&
+	       test->max.y <= b->max.y &&
+	       test->max.z <= b->max.z;
+}
+
+static inline bool bounds_vec3_inside(const struct bounds *b,
+		const struct vec3 *v)
+{
+	return  v->x >= (b->min.x-EPSILON) &&
+		v->x <= (b->max.x+EPSILON) &&
+		v->y >= (b->min.y-EPSILON) &&
+		v->y <= (b->max.y+EPSILON) &&
+		v->z >= (b->min.z-EPSILON) &&
+		v->z <= (b->max.z+EPSILON);
+}
+
+EXPORT bool bounds_intersects(const struct bounds *b,
+		const struct bounds *test, float epsilon);
+EXPORT bool bounds_intersects_obb(const struct bounds *b,
+		const struct bounds *test, const struct matrix4 *m,
+		float epsilon);
+EXPORT bool bounds_intersects_obb3x4(const struct bounds *b,
+		const struct bounds *test, const struct matrix3 *m,
+		float epsilon);
+
+static inline bool bounds_intersects_ray(const struct bounds *b,
+		const struct vec3 *orig, const struct vec3 *dir)
+{
+	float t;
+	return bounds_intersection_ray(b, orig, dir, &t);
+}
+
+static inline bool bounds_intersects_line(const struct bounds *b,
+		const struct vec3 *p1, const struct vec3 *p2)
+{
+	float t;
+	return bounds_intersection_line(b, p1, p2, &t);
+}
+
+EXPORT float bounds_min_dist(const struct bounds *b, const struct plane *p);
+
+#ifdef __cplusplus
+}
+#endif