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+
+#ifndef GODOT_RECT2_HPP
+#define GODOT_RECT2_HPP
+
+#include <godot_cpp/core/math.hpp>
+#include <godot_cpp/variant/vector2.hpp>
+#include <godot_cpp/classes/global_constants.hpp>
+
+namespace godot {
+
+struct Transform2D;
+
+class Rect2 {
+public:
+ _FORCE_INLINE_ GDNativeTypePtr ptr() const { return (void *)this; }
+
+ Point2 position;
+ Size2 size;
+
+ const Vector2 &get_position() const { return position; }
+ void set_position(const Vector2 &p_pos) { position = p_pos; }
+ const Vector2 &get_size() const { return size; }
+ void set_size(const Vector2 &p_size) { size = p_size; }
+
+ real_t get_area() const { return size.width * size.height; }
+
+ inline bool intersects(const Rect2 &p_rect, const bool p_include_borders = false) const {
+ if (p_include_borders) {
+ if (position.x > (p_rect.position.x + p_rect.size.width)) {
+ return false;
+ }
+ if ((position.x + size.width) < p_rect.position.x) {
+ return false;
+ }
+ if (position.y > (p_rect.position.y + p_rect.size.height)) {
+ return false;
+ }
+ if ((position.y + size.height) < p_rect.position.y) {
+ return false;
+ }
+ } else {
+ if (position.x >= (p_rect.position.x + p_rect.size.width)) {
+ return false;
+ }
+ if ((position.x + size.width) <= p_rect.position.x) {
+ return false;
+ }
+ if (position.y >= (p_rect.position.y + p_rect.size.height)) {
+ return false;
+ }
+ if ((position.y + size.height) <= p_rect.position.y) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ inline real_t distance_to(const Vector2 &p_point) const {
+ real_t dist = 0.0;
+ bool inside = true;
+
+ if (p_point.x < position.x) {
+ real_t d = position.x - p_point.x;
+ dist = d;
+ inside = false;
+ }
+ if (p_point.y < position.y) {
+ real_t d = position.y - p_point.y;
+ dist = inside ? d : Math::min(dist, d);
+ inside = false;
+ }
+ if (p_point.x >= (position.x + size.x)) {
+ real_t d = p_point.x - (position.x + size.x);
+ dist = inside ? d : Math::min(dist, d);
+ inside = false;
+ }
+ if (p_point.y >= (position.y + size.y)) {
+ real_t d = p_point.y - (position.y + size.y);
+ dist = inside ? d : Math::min(dist, d);
+ inside = false;
+ }
+
+ if (inside) {
+ return 0;
+ } else {
+ return dist;
+ }
+ }
+
+ bool intersects_transformed(const Transform2D &p_xform, const Rect2 &p_rect) const;
+
+ bool intersects_segment(const Point2 &p_from, const Point2 &p_to, Point2 *r_pos = nullptr, Point2 *r_normal = nullptr) const;
+
+ inline bool encloses(const Rect2 &p_rect) const {
+ return (p_rect.position.x >= position.x) && (p_rect.position.y >= position.y) &&
+ ((p_rect.position.x + p_rect.size.x) <= (position.x + size.x)) &&
+ ((p_rect.position.y + p_rect.size.y) <= (position.y + size.y));
+ }
+
+ inline bool has_no_area() const {
+ return (size.x <= 0 || size.y <= 0);
+ }
+
+ // Returns the instersection between two Rect2s or an empty Rect2 if there is no intersection
+ inline Rect2 intersection(const Rect2 &p_rect) const {
+ Rect2 new_rect = p_rect;
+
+ if (!intersects(new_rect)) {
+ return Rect2();
+ }
+
+ new_rect.position.x = Math::max(p_rect.position.x, position.x);
+ new_rect.position.y = Math::max(p_rect.position.y, position.y);
+
+ Point2 p_rect_end = p_rect.position + p_rect.size;
+ Point2 end = position + size;
+
+ new_rect.size.x = Math::min(p_rect_end.x, end.x) - new_rect.position.x;
+ new_rect.size.y = Math::min(p_rect_end.y, end.y) - new_rect.position.y;
+
+ return new_rect;
+ }
+
+ inline Rect2 merge(const Rect2 &p_rect) const { ///< return a merged rect
+
+ Rect2 new_rect;
+
+ new_rect.position.x = Math::min(p_rect.position.x, position.x);
+ new_rect.position.y = Math::min(p_rect.position.y, position.y);
+
+ new_rect.size.x = Math::max(p_rect.position.x + p_rect.size.x, position.x + size.x);
+ new_rect.size.y = Math::max(p_rect.position.y + p_rect.size.y, position.y + size.y);
+
+ new_rect.size = new_rect.size - new_rect.position; //make relative again
+
+ return new_rect;
+ }
+ inline bool has_point(const Point2 &p_point) const {
+ if (p_point.x < position.x) {
+ return false;
+ }
+ if (p_point.y < position.y) {
+ return false;
+ }
+
+ if (p_point.x >= (position.x + size.x)) {
+ return false;
+ }
+ if (p_point.y >= (position.y + size.y)) {
+ return false;
+ }
+
+ return true;
+ }
+ bool is_equal_approx(const Rect2 &p_rect) const;
+
+ bool operator==(const Rect2 &p_rect) const { return position == p_rect.position && size == p_rect.size; }
+ bool operator!=(const Rect2 &p_rect) const { return position != p_rect.position || size != p_rect.size; }
+
+ inline Rect2 grow(real_t p_amount) const {
+ Rect2 g = *this;
+ g.position.x -= p_amount;
+ g.position.y -= p_amount;
+ g.size.width += p_amount * 2;
+ g.size.height += p_amount * 2;
+ return g;
+ }
+
+ inline Rect2 grow_side(Side p_side, real_t p_amount) const {
+ Rect2 g = *this;
+ g = g.grow_individual((SIDE_LEFT == p_side) ? p_amount : 0,
+ (SIDE_TOP == p_side) ? p_amount : 0,
+ (SIDE_RIGHT == p_side) ? p_amount : 0,
+ (SIDE_BOTTOM == p_side) ? p_amount : 0);
+ return g;
+ }
+
+ inline Rect2 grow_side_bind(uint32_t p_side, real_t p_amount) const {
+ return grow_side(Side(p_side), p_amount);
+ }
+
+ inline Rect2 grow_individual(real_t p_left, real_t p_top, real_t p_right, real_t p_bottom) const {
+ Rect2 g = *this;
+ g.position.x -= p_left;
+ g.position.y -= p_top;
+ g.size.width += p_left + p_right;
+ g.size.height += p_top + p_bottom;
+
+ return g;
+ }
+
+ inline Rect2 expand(const Vector2 &p_vector) const {
+ Rect2 r = *this;
+ r.expand_to(p_vector);
+ return r;
+ }
+
+ inline void expand_to(const Vector2 &p_vector) { //in place function for speed
+
+ Vector2 begin = position;
+ Vector2 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.x > end.x) {
+ end.x = p_vector.x;
+ }
+ if (p_vector.y > end.y) {
+ end.y = p_vector.y;
+ }
+
+ position = begin;
+ size = end - begin;
+ }
+
+ inline Rect2 abs() const {
+ return Rect2(Point2(position.x + Math::min(size.x, (real_t)0), position.y + Math::min(size.y, (real_t)0)), size.abs());
+ }
+
+ Vector2 get_support(const Vector2 &p_normal) const {
+ Vector2 half_extents = size * 0.5;
+ Vector2 ofs = position + half_extents;
+ return Vector2(
+ (p_normal.x > 0) ? -half_extents.x : half_extents.x,
+ (p_normal.y > 0) ? -half_extents.y : half_extents.y) +
+ ofs;
+ }
+
+ inline bool intersects_filled_polygon(const Vector2 *p_points, int p_point_count) const {
+ Vector2 center = position + size * 0.5;
+ int side_plus = 0;
+ int side_minus = 0;
+ Vector2 end = position + size;
+
+ int i_f = p_point_count - 1;
+ for (int i = 0; i < p_point_count; i++) {
+ const Vector2 &a = p_points[i_f];
+ const Vector2 &b = p_points[i];
+ i_f = i;
+
+ Vector2 r = (b - a);
+ float l = r.length();
+ if (l == 0.0) {
+ continue;
+ }
+
+ //check inside
+ Vector2 tg = r.orthogonal();
+ float s = tg.dot(center) - tg.dot(a);
+ if (s < 0.0) {
+ side_plus++;
+ } else {
+ side_minus++;
+ }
+
+ //check ray box
+ r /= l;
+ Vector2 ir(1.0 / r.x, 1.0 / r.y);
+
+ // lb is the corner of AABB with minimal coordinates - left bottom, rt is maximal corner
+ // r.org is origin of ray
+ Vector2 t13 = (position - a) * ir;
+ Vector2 t24 = (end - a) * ir;
+
+ float tmin = Math::max(Math::min(t13.x, t24.x), Math::min(t13.y, t24.y));
+ float tmax = Math::min(Math::max(t13.x, t24.x), Math::max(t13.y, t24.y));
+
+ // if tmax < 0, ray (line) is intersecting AABB, but the whole AABB is behind us
+ if (tmax < 0 || tmin > tmax || tmin >= l) {
+ continue;
+ }
+
+ return true;
+ }
+
+ if (side_plus * side_minus == 0) {
+ return true; //all inside
+ } else {
+ return false;
+ }
+ }
+
+ inline void set_end(const Vector2 &p_end) {
+ size = p_end - position;
+ }
+
+ inline Vector2 get_end() const {
+ return position + size;
+ }
+
+ operator String() const;
+
+ Rect2() {}
+ Rect2(real_t p_x, real_t p_y, real_t p_width, real_t p_height) :
+ position(Point2(p_x, p_y)),
+ size(Size2(p_width, p_height)) {
+ }
+ Rect2(const Point2 &p_pos, const Size2 &p_size) :
+ position(p_pos),
+ size(p_size) {
+ }
+};
+
+} // namespace godot
+
+#endif // GODOT_RECT2_HPP