How to join two corresponding corners of two rectangles with a line

VishalSubramanyam

I want to create a kind of cube/cuboid with two rectangles. I want to know how to join two corresponding corners of two different rectangles using a line. Is there a way to reference the location of each corner of a rectangle?

Chrisir

a rect is given by

rect(x,y,w,h); (x and y position and width and height)

so when you draw a rect this way you already have all necessary data:

• your first corner is x,y

• diagonal corner is x+w, y+h

• lower left corner is x, y+h (only y value changes)

• upper right corner is x+w, y (only x value changes)

;-)

VishalSubramanyam

That is a good way to do it. Thanks Chrisir.

Chrisir

Great!

Chrisir

when you write a class Rectangle you can make this more elegant when you use PVector like

• upperLeftCorner

• upperRightCorner

• lowerLeftCorner

• lowerRightCorner

GoToLoop

We can also change rectMode() to CORNERS:
https://processing.org/reference/rectMode_.html

Chrisir

ClassRect rect;  

void setup() {
  size(640, 560);
  background(111);
  rect = new ClassRect  (  111, 122, 222, 333  );
}

void draw() { 
  background(111);
  stroke(0);
  text ("Rect  ", 30, 30);
  rect.draw();
} // func 

// =============================

class ClassRect {

  float x1, y1, // POS 
  rectWidth, rectHeight;   // SIZE 
  PVector upperLeftCorner, upperRightCorner, 
  lowerLeftCorner, lowerRightCorner;

  // constr 
  ClassRect (float x1_, float y1_, 
  float rectWidth_, float rectHeight_) 
  {
    // constr 
    x1=x1_;
    y1=y1_;

    rectWidth=rectWidth_;
    rectHeight=rectHeight_;
  } // constr

  void draw() {
    rect(x1, y1, 
    rectWidth, rectHeight);
  } // method
  //
} // 

//