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diff --git a/core/math/rect3.h b/core/math/rect3.h
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--- a/core/math/rect3.h
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@@ -1,345 +0,0 @@
-/*************************************************************************/
-/*  rect3.h                                                              */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
-/*                                                                       */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the       */
-/* "Software"), to deal in the Software without restriction, including   */
-/* without limitation the rights to use, copy, modify, merge, publish,   */
-/* distribute, sublicense, and/or sell copies of the Software, and to    */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions:                                             */
-/*                                                                       */
-/* The above copyright notice and this permission notice shall be        */
-/* included in all copies or substantial portions of the Software.       */
-/*                                                                       */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-/*************************************************************************/
-#ifndef AABB_H
-#define AABB_H
-
-#include "math_defs.h"
-#include "plane.h"
-#include "vector3.h"
-
-/**
- * AABB / AABB (Axis Aligned Bounding Box)
- * This is implemented by a point (position) and the box size
- */
-
-class Rect3 {
-public:
-	Vector3 position;
-	Vector3 size;
-
-	real_t get_area() const; /// get area
-	_FORCE_INLINE_ bool has_no_area() const {
-
-		return (size.x <= 0 || size.y <= 0 || size.z <= 0);
-	}
-
-	_FORCE_INLINE_ bool has_no_surface() const {
-
-		return (size.x <= 0 && size.y <= 0 && size.z <= 0);
-	}
-
-	const Vector3 &get_position() const { return position; }
-	void set_position(const Vector3 &p_pos) { position = p_pos; }
-	const Vector3 &get_size() const { return size; }
-	void set_size(const Vector3 &p_size) { size = p_size; }
-
-	bool operator==(const Rect3 &p_rval) const;
-	bool operator!=(const Rect3 &p_rval) const;
-
-	_FORCE_INLINE_ bool intersects(const Rect3 &p_aabb) const; /// Both AABBs overlap
-	_FORCE_INLINE_ bool intersects_inclusive(const Rect3 &p_aabb) const; /// Both AABBs (or their faces) overlap
-	_FORCE_INLINE_ bool encloses(const Rect3 &p_aabb) const; /// p_aabb is completely inside this
-
-	Rect3 merge(const Rect3 &p_with) const;
-	void merge_with(const Rect3 &p_aabb); ///merge with another AABB
-	Rect3 intersection(const Rect3 &p_aabb) const; ///get box where two intersect, empty if no intersection occurs
-	bool intersects_segment(const Vector3 &p_from, const Vector3 &p_to, Vector3 *r_clip = NULL, Vector3 *r_normal = NULL) const;
-	bool intersects_ray(const Vector3 &p_from, const Vector3 &p_dir, Vector3 *r_clip = NULL, Vector3 *r_normal = NULL) const;
-	_FORCE_INLINE_ bool smits_intersect_ray(const Vector3 &p_from, const Vector3 &p_dir, real_t t0, real_t t1) const;
-
-	_FORCE_INLINE_ bool intersects_convex_shape(const Plane *p_planes, int p_plane_count) const;
-	bool intersects_plane(const Plane &p_plane) const;
-
-	_FORCE_INLINE_ bool has_point(const Vector3 &p_point) const;
-	_FORCE_INLINE_ Vector3 get_support(const Vector3 &p_normal) const;
-
-	Vector3 get_longest_axis() const;
-	int get_longest_axis_index() const;
-	_FORCE_INLINE_ real_t get_longest_axis_size() const;
-
-	Vector3 get_shortest_axis() const;
-	int get_shortest_axis_index() const;
-	_FORCE_INLINE_ real_t get_shortest_axis_size() const;
-
-	Rect3 grow(real_t p_by) const;
-	_FORCE_INLINE_ void grow_by(real_t p_amount);
-
-	void get_edge(int p_edge, Vector3 &r_from, Vector3 &r_to) const;
-	_FORCE_INLINE_ Vector3 get_endpoint(int p_point) const;
-
-	Rect3 expand(const Vector3 &p_vector) const;
-	_FORCE_INLINE_ void project_range_in_plane(const Plane &p_plane, real_t &r_min, real_t &r_max) const;
-	_FORCE_INLINE_ void expand_to(const Vector3 &p_vector); /** expand to contain a point if necessary */
-
-	operator String() const;
-
-	_FORCE_INLINE_ Rect3() {}
-	inline Rect3(const Vector3 &p_pos, const Vector3 &p_size)
-		: position(p_pos),
-		  size(p_size) {
-	}
-};
-
-inline bool Rect3::intersects(const Rect3 &p_aabb) const {
-
-	if (position.x >= (p_aabb.position.x + p_aabb.size.x))
-		return false;
-	if ((position.x + size.x) <= p_aabb.position.x)
-		return false;
-	if (position.y >= (p_aabb.position.y + p_aabb.size.y))
-		return false;
-	if ((position.y + size.y) <= p_aabb.position.y)
-		return false;
-	if (position.z >= (p_aabb.position.z + p_aabb.size.z))
-		return false;
-	if ((position.z + size.z) <= p_aabb.position.z)
-		return false;
-
-	return true;
-}
-
-inline bool Rect3::intersects_inclusive(const Rect3 &p_aabb) const {
-
-	if (position.x > (p_aabb.position.x + p_aabb.size.x))
-		return false;
-	if ((position.x + size.x) < p_aabb.position.x)
-		return false;
-	if (position.y > (p_aabb.position.y + p_aabb.size.y))
-		return false;
-	if ((position.y + size.y) < p_aabb.position.y)
-		return false;
-	if (position.z > (p_aabb.position.z + p_aabb.size.z))
-		return false;
-	if ((position.z + size.z) < p_aabb.position.z)
-		return false;
-
-	return true;
-}
-
-inline bool Rect3::encloses(const Rect3 &p_aabb) const {
-
-	Vector3 src_min = position;
-	Vector3 src_max = position + size;
-	Vector3 dst_min = p_aabb.position;
-	Vector3 dst_max = p_aabb.position + p_aabb.size;
-
-	return (
-			(src_min.x <= dst_min.x) &&
-			(src_max.x > dst_max.x) &&
-			(src_min.y <= dst_min.y) &&
-			(src_max.y > dst_max.y) &&
-			(src_min.z <= dst_min.z) &&
-			(src_max.z > dst_max.z));
-}
-
-Vector3 Rect3::get_support(const Vector3 &p_normal) const {
-
-	Vector3 half_extents = size * 0.5;
-	Vector3 ofs = position + half_extents;
-
-	return Vector3(
-				   (p_normal.x > 0) ? -half_extents.x : half_extents.x,
-				   (p_normal.y > 0) ? -half_extents.y : half_extents.y,
-				   (p_normal.z > 0) ? -half_extents.z : half_extents.z) +
-		   ofs;
-}
-
-Vector3 Rect3::get_endpoint(int p_point) const {
-
-	switch (p_point) {
-		case 0: return Vector3(position.x, position.y, position.z);
-		case 1: return Vector3(position.x, position.y, position.z + size.z);
-		case 2: return Vector3(position.x, position.y + size.y, position.z);
-		case 3: return Vector3(position.x, position.y + size.y, position.z + size.z);
-		case 4: return Vector3(position.x + size.x, position.y, position.z);
-		case 5: return Vector3(position.x + size.x, position.y, position.z + size.z);
-		case 6: return Vector3(position.x + size.x, position.y + size.y, position.z);
-		case 7: return Vector3(position.x + size.x, position.y + size.y, position.z + size.z);
-	};
-
-	ERR_FAIL_V(Vector3());
-}
-
-bool Rect3::intersects_convex_shape(const Plane *p_planes, int p_plane_count) const {
-
-	Vector3 half_extents = size * 0.5;
-	Vector3 ofs = position + half_extents;
-
-	for (int i = 0; i < p_plane_count; i++) {
-		const Plane &p = p_planes[i];
-		Vector3 point(
-				(p.normal.x > 0) ? -half_extents.x : half_extents.x,
-				(p.normal.y > 0) ? -half_extents.y : half_extents.y,
-				(p.normal.z > 0) ? -half_extents.z : half_extents.z);
-		point += ofs;
-		if (p.is_point_over(point))
-			return false;
-	}
-
-	return true;
-}
-
-bool Rect3::has_point(const Vector3 &p_point) const {
-
-	if (p_point.x < position.x)
-		return false;
-	if (p_point.y < position.y)
-		return false;
-	if (p_point.z < position.z)
-		return false;
-	if (p_point.x > position.x + size.x)
-		return false;
-	if (p_point.y > position.y + size.y)
-		return false;
-	if (p_point.z > position.z + size.z)
-		return false;
-
-	return true;
-}
-
-inline void Rect3::expand_to(const Vector3 &p_vector) {
-
-	Vector3 begin = position;
-	Vector3 end = position + size;
-
-	if (p_vector.x < begin.x)
-		begin.x = p_vector.x;
-	if (p_vector.y < begin.y)
-		begin.y = p_vector.y;
-	if (p_vector.z < begin.z)
-		begin.z = p_vector.z;
-
-	if (p_vector.x > end.x)
-		end.x = p_vector.x;
-	if (p_vector.y > end.y)
-		end.y = p_vector.y;
-	if (p_vector.z > end.z)
-		end.z = p_vector.z;
-
-	position = begin;
-	size = end - begin;
-}
-
-void Rect3::project_range_in_plane(const Plane &p_plane, real_t &r_min, real_t &r_max) const {
-
-	Vector3 half_extents(size.x * 0.5, size.y * 0.5, size.z * 0.5);
-	Vector3 center(position.x + half_extents.x, position.y + half_extents.y, position.z + half_extents.z);
-
-	real_t length = p_plane.normal.abs().dot(half_extents);
-	real_t distance = p_plane.distance_to(center);
-	r_min = distance - length;
-	r_max = distance + length;
-}
-
-inline real_t Rect3::get_longest_axis_size() const {
-
-	real_t max_size = size.x;
-
-	if (size.y > max_size) {
-		max_size = size.y;
-	}
-
-	if (size.z > max_size) {
-		max_size = size.z;
-	}
-
-	return max_size;
-}
-
-inline real_t Rect3::get_shortest_axis_size() const {
-
-	real_t max_size = size.x;
-
-	if (size.y < max_size) {
-		max_size = size.y;
-	}
-
-	if (size.z < max_size) {
-		max_size = size.z;
-	}
-
-	return max_size;
-}
-
-bool Rect3::smits_intersect_ray(const Vector3 &p_from, const Vector3 &p_dir, real_t t0, real_t t1) const {
-
-	real_t divx = 1.0 / p_dir.x;
-	real_t divy = 1.0 / p_dir.y;
-	real_t divz = 1.0 / p_dir.z;
-
-	Vector3 upbound = position + size;
-	real_t tmin, tmax, tymin, tymax, tzmin, tzmax;
-	if (p_dir.x >= 0) {
-		tmin = (position.x - p_from.x) * divx;
-		tmax = (upbound.x - p_from.x) * divx;
-	} else {
-		tmin = (upbound.x - p_from.x) * divx;
-		tmax = (position.x - p_from.x) * divx;
-	}
-	if (p_dir.y >= 0) {
-		tymin = (position.y - p_from.y) * divy;
-		tymax = (upbound.y - p_from.y) * divy;
-	} else {
-		tymin = (upbound.y - p_from.y) * divy;
-		tymax = (position.y - p_from.y) * divy;
-	}
-	if ((tmin > tymax) || (tymin > tmax))
-		return false;
-	if (tymin > tmin)
-		tmin = tymin;
-	if (tymax < tmax)
-		tmax = tymax;
-	if (p_dir.z >= 0) {
-		tzmin = (position.z - p_from.z) * divz;
-		tzmax = (upbound.z - p_from.z) * divz;
-	} else {
-		tzmin = (upbound.z - p_from.z) * divz;
-		tzmax = (position.z - p_from.z) * divz;
-	}
-	if ((tmin > tzmax) || (tzmin > tmax))
-		return false;
-	if (tzmin > tmin)
-		tmin = tzmin;
-	if (tzmax < tmax)
-		tmax = tzmax;
-	return ((tmin < t1) && (tmax > t0));
-}
-
-void Rect3::grow_by(real_t p_amount) {
-
-	position.x -= p_amount;
-	position.y -= p_amount;
-	position.z -= p_amount;
-	size.x += 2.0 * p_amount;
-	size.y += 2.0 * p_amount;
-	size.z += 2.0 * p_amount;
-}
-
-#endif // AABB_H