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/*************************************************************************/
/* math_2d.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 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 MATH_2D_H
#define MATH_2D_H
#include "transform_2d.h"
/**
@author Juan Linietsky <reduzio@gmail.com>
*/
/* INTEGER STUFF */
struct Point2i {
union {
int x;
int width;
};
union {
int y;
int height;
};
_FORCE_INLINE_ int &operator[](int p_idx) {
return p_idx ? y : x;
}
_FORCE_INLINE_ const int &operator[](int p_idx) const {
return p_idx ? y : x;
}
Point2i operator+(const Point2i &p_v) const;
void operator+=(const Point2i &p_v);
Point2i operator-(const Point2i &p_v) const;
void operator-=(const Point2i &p_v);
Point2i operator*(const Point2i &p_v1) const;
Point2i operator*(const int &rvalue) const;
void operator*=(const int &rvalue);
Point2i operator/(const Point2i &p_v1) const;
Point2i operator/(const int &rvalue) const;
void operator/=(const int &rvalue);
Point2i operator-() const;
bool operator<(const Point2i &p_vec2) const { return (x == p_vec2.x) ? (y < p_vec2.y) : (x < p_vec2.x); }
bool operator>(const Point2i &p_vec2) const { return (x == p_vec2.x) ? (y > p_vec2.y) : (x > p_vec2.x); }
bool operator==(const Point2i &p_vec2) const;
bool operator!=(const Point2i &p_vec2) const;
real_t get_aspect() const { return width / (real_t)height; }
operator String() const { return String::num(x) + ", " + String::num(y); }
operator Vector2() const { return Vector2(x, y); }
inline Point2i(const Vector2 &p_vec2) {
x = (int)p_vec2.x;
y = (int)p_vec2.y;
}
inline Point2i(int p_x, int p_y) {
x = p_x;
y = p_y;
}
inline Point2i() {
x = 0;
y = 0;
}
};
typedef Point2i Size2i;
struct Rect2i {
Point2i position;
Size2i size;
const Point2i &get_position() const { return position; }
void set_position(const Point2i &p_pos) { position = p_pos; }
const Point2i &get_size() const { return size; }
void set_size(const Point2i &p_size) { size = p_size; }
int get_area() const { return size.width * size.height; }
inline bool intersects(const Rect2i &p_rect) const {
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 bool encloses(const Rect2i &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);
}
inline Rect2i clip(const Rect2i &p_rect) const { /// return a clipped rect
Rect2i new_rect = p_rect;
if (!intersects(new_rect))
return Rect2i();
new_rect.position.x = MAX(p_rect.position.x, position.x);
new_rect.position.y = 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 = (int)(MIN(p_rect_end.x, end.x) - new_rect.position.x);
new_rect.size.y = (int)(MIN(p_rect_end.y, end.y) - new_rect.position.y);
return new_rect;
}
inline Rect2i merge(const Rect2i &p_rect) const { ///< return a merged rect
Rect2i new_rect;
new_rect.position.x = MIN(p_rect.position.x, position.x);
new_rect.position.y = MIN(p_rect.position.y, position.y);
new_rect.size.x = MAX(p_rect.position.x + p_rect.size.x, position.x + size.x);
new_rect.size.y = 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;
};
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 no_area() { return (size.width <= 0 || size.height <= 0); }
bool operator==(const Rect2i &p_rect) const { return position == p_rect.position && size == p_rect.size; }
bool operator!=(const Rect2i &p_rect) const { return position != p_rect.position || size != p_rect.size; }
Rect2i grow(int p_by) const {
Rect2i g = *this;
g.position.x -= p_by;
g.position.y -= p_by;
g.size.width += p_by * 2;
g.size.height += p_by * 2;
return g;
}
inline void expand_to(const Point2i &p_vector) {
Point2i begin = position;
Point2i 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;
}
operator String() const { return String(position) + ", " + String(size); }
operator Rect2() const { return Rect2(position, size); }
Rect2i(const Rect2 &p_r2) :
position(p_r2.position),
size(p_r2.size) {
}
Rect2i() {}
Rect2i(int p_x, int p_y, int p_width, int p_height) :
position(Point2(p_x, p_y)),
size(Size2(p_width, p_height)) {
}
Rect2i(const Point2 &p_pos, const Size2 &p_size) :
position(p_pos),
size(p_size) {
}
};
#endif
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