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/*
* Simple Mechanics Simulator (SiMS)
* copyright (c) 2009 Jakob Odersky
* made available under the MIT License
*/
package sims.collision
import geometry._
/**
* Axis Aligned Bounding Boxes (AABBs) are rectangles that frame a shape.
* Their X-Axis and Y-Axis orientation makes it easy to test two AABBs for overlap.
* @param minVertex Position vector of the bottom-left vertex
* @param maxVertex Position vector of the upper-right vertex
*/
case class AABB(val minVertex: Vector2D,
val maxVertex: Vector2D)
{
/**
* Checks this AABB with <code>box</code> for overlap.
* @param box AABB with which to check for overlap*/
def overlaps(box: AABB): Boolean = {
val d1 = box.minVertex - maxVertex
val d2 = minVertex - box.maxVertex
!(d1.x > 0 || d1.y > 0 || d2.x > 0 || d2.y > 0)
}
}
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