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overlap2d-runtime-libgdx provides functionality to load, manipulate and render scenes generated by Overlap2D.
package com.brashmonkey.spriter;
/**
* Represents a 2D rectangle with left, top, right and bottom bounds.
* A rectangle is responsible for calculating its own size and checking if a point is inside it or if it is intersecting with another rectangle.
* @author Trixt0r
*
*/
public class Rectangle {
/**
* Belongs to the bounds of this rectangle.
*/
public float left, top, right, bottom;
/**
* The size of this rectangle.
*/
public final Dimension size;
/**
* Creates a rectangle with the given bounds.
* @param left left bounding
* @param top top bounding
* @param right right bounding
* @param bottom bottom bounding
*/
public Rectangle(float left, float top, float right, float bottom){
this.set(left, top, right, bottom);
this.size = new Dimension(0, 0);
this.calculateSize();
}
/**
* Creates a rectangle with the bounds of the given rectangle.
* @param rect rectangle containing the bounds.
*/
public Rectangle(Rectangle rect){
this(rect.left, rect.top, rect.right, rect.bottom);
}
/**
* Returns whether the given point (x,y) is inside this rectangle.
* @param x the x coordinate
* @param y the y coordinate
* @return true if (x,y) is inside
*/
public boolean isInside(float x, float y){
return x >= this.left && x <= this.right && y <= this.top && y >= this.bottom;
}
/**
* Returns whether the given point is inside this rectangle.
* @param point the point
* @return true if the point is inside
*/
public boolean isInside(Point point){
return isInside(point.x, point.y);
}
/**
* Calculates the size of this rectangle.
*/
public void calculateSize(){
this.size.set(right-left, top-bottom);
}
/**
* Sets the bounds of this rectangle to the bounds of the given rectangle.
* @param rect rectangle containing the bounds.
*/
public void set(Rectangle rect){
if(rect == null) return;
this.bottom = rect.bottom;
this.left = rect.left;
this.right = rect.right;
this.top = rect.top;
this.calculateSize();
}
/**
* Sets the bounds of this rectangle to the given bounds.
* @param left left bounding
* @param top top bounding
* @param right right bounding
* @param bottom bottom bounding
*/
public void set(float left, float top, float right, float bottom){
this.left = left;
this.top = top;
this.right = right;
this.bottom = bottom;
}
/**
* Returns whether the given two rectangles are intersecting.
* @param rect1 the first rectangle
* @param rect2 the second rectangle
* @return true if the rectangles are intersecting
*/
public static boolean areIntersecting(Rectangle rect1, Rectangle rect2){
return rect1.isInside(rect2.left, rect2.top) || rect1.isInside(rect2.right, rect2.top)
|| rect1.isInside(rect2.left, rect2.bottom) || rect1.isInside(rect2.right, rect2.bottom);
}
/**
* Creates a bigger rectangle of the given two and saves it in the target.
* @param rect1 the first rectangle
* @param rect2 the second rectangle
* @param target the target to save the new bounds.
*/
public static void setBiggerRectangle(Rectangle rect1, Rectangle rect2, Rectangle target){
target.left = Math.min(rect1.left, rect2.left);
target.bottom = Math.min(rect1.bottom, rect2.bottom);
target.right = Math.max(rect1.right, rect2.right);
target.top = Math.max(rect1.top, rect2.top);
}
}