topical media & game development

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graphic-processing-site-examples-Basics-Structure-Coordinates-Coordinates.pde / pde



  
Coordinates. All shapes drawn to the screen have a position that is specified as a coordinate. All coordinates are measured as the distance from the origin in units of pixels. The origin [0, 0] is the coordinate is in the upper left of the window and the coordinate in the lower right is [width-1, height-1].

  
  
  // Sets the screen to be 200, 200, so the width of the window is 200 pixels
  // and the height of the window is 200 pixels
  size(200, 200);
  background(0);
  noFill();
  stroke(255);
  
  // The two parameters of the point() method each specify coordinates.
  // This call to point() draws at the position [100, 100]
  point(width/2, height/2);
  
  // Draws to the position [100, 50]
  point(width/2, height/4); 
  
  // It is also possible to specify a point with any parameter, 
  // but only coordinates on the screen are visible
  point(60, 30);
  point(60, 134);
  point(160, 50);
  point(280, -800);
  point(201, 100);
  
  // Coordinates are used for drawing all shapes, not just points.
  // Parameters for different methods are used for different purposes.
  // For example, the first two parameters to line() specify the coordinates of the 
  // first point and the second two parameters specify the second point
  stroke(204);
  line(0, 73, width, 73);
  
  // The first two parameters to rect() are coordinates
  // and the second two are the width and height
  rect(110, 55, 40, 36);
  


(C) Æliens 20/2/2008

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