commit1-overlappingrectangles

batCoder95 · web-flow · commit 81f5d47a49b8 · 2016-07-15T18:52:18.000+05:30
diff --git a/OverlappingRectangles.java b/OverlappingRectangles.java
@@ -0,0 +1,51 @@
+/**
+ * Created by Vatsal Gosaliya on 15-Jul-16.
+ *
+ * PROBLEM: Given are two rectangles defined over the 2-D cartesian coordinate system.
+ *          Each rectangle is expressed using the top-left corner, width and height.
+ *          The aim is to detect whether they overlap, and compute the overlapping
+ *          area, if they do.
+ */
+
+class OverlappingRectangles {
+	private double x,y,width,height;
+
+	OverlappingRectangles(double x, double y, double width, double height){
+		this.x = x;
+		this.y = y;
+		this.width = width;
+		this.height = height;
+	}
+	
+	OverlappingRectangles intersection(OverlappingRectangles rect2) {
+        double newX = Math.max(this.x, rect2.x);
+        double newY = Math.min(this.y, rect2.y);
+        //System.out.println("newX = "+newX);
+        //System.out.println("newY = "+newY);
+
+        double newWidth = Math.min(this.x + this.width, rect2.x + rect2.width) - newX;
+        double newHeight = newY - Math.max(this.y - this.height, rect2.y - rect2.height);
+        //System.out.println("newWidth = "+newWidth);
+        //System.out.println("newHeight = "+newHeight);
+
+        if (newWidth <= 0d || newHeight <= 0d){
+            System.out.print("No intersection.");
+            return null;
+        }
+
+        return new OverlappingRectangles(newX, newY, newWidth, newHeight);
+    }
+
+	
+	public double getArea(){
+		return this.width*this.height;
+	}
+	
+	public static void main(String args[]){
+		OverlappingRectangles r1 = new OverlappingRectangles(2,8,3,4);
+		OverlappingRectangles r2 = new OverlappingRectangles(1,7,6,2);
+		OverlappingRectangles r = r1.intersection(r2);
+		double areaOfIntersection = r == null ? 0 : r.getArea();
+		System.out.print("Area of intersection : "+areaOfIntersection);
+	}
+}
