Rect Rect Intersect

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float rX1 = 100;  // x

float rY1 = 100;  // y

float rW1 = 190;  // width

float rH1 = 120;  // height

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float rX2;        // x

float rY2;        // y

float rW2 = 90;   // width

float rH2 = 20;   // height

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void setup() {

  size(400, 400); 

  ellipseMode(RADIUS);

  smooth();

}

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void draw() {

  background(204);

  rX2 = mouseX;

  rY2 = mouseY;

  if (rectRectIntersect(rX1, rY1, rX1+rW1, rY1+rH1, rX2, rY2, rX2+rW2, rY2+rH2) == true) {

    fill(0); 

  } else {

    fill(255); 

  }

  rect(rX1, rY1, rW1, rH1); 

  rect(rX2, rY2, rW2, rH2); 

}

​

boolean rectRectIntersect(float left, float top, float right, float bottom, 

                          float otherLeft, float otherTop, float otherRight, float otherBottom) {

  return !(left > otherRight || right < otherLeft || top > otherBottom || bottom < otherTop);

}

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