fatline

Ever notice how strokeweight stops working after you give it a certain size? It's like lines refuse to become obese!

With this method you can draw as wide a line as you please. It will hijack Processing's stroke weight and draw a line with an actual rectangle.

This method could be further improved by using circles for stroke caps and such. The rest is up to your imagination.

Note: you can probably shorten this code using processing's new pushStyle() / popStyle(). This was done the oldschool way.

/**
fatline taken from http://processinghacks.com/hacks:fatline
@author mflux
*/
 
// the goods
void fatLine(float x1, float y1, float x2, float y2){
  float distance = dist(x1, y1, x2, y2);		
  float angle = 360-atan2((y2-y1),x2-x1) ;
 
  boolean originalStroke = g.stroke;
  int originalStrokeColor = g.strokeColor;
  float originalStrokeWeight = g.strokeWeight;        
  boolean originalFill = g.fill;
  int originalFillColor = g.fillColor;
  float thickness = originalStrokeWeight;
 
  stroke(originalStrokeColor);
  strokeWeight(1);
  fill(originalStrokeColor);
 
  pushMatrix();
  translate(x1,y1);
  rotate(360 - angle);
  rect(0, - (thickness / 2 ), distance, thickness);
  popMatrix();
 
  g.stroke = originalStroke;
  g.strokeColor = originalStrokeColor;
  g.strokeWeight = originalStrokeWeight;		
  g.fill = originalFill;
  g.fillColor = originalFillColor;
 
}
 
// the example
void setup(){
  size(800,800);
}
 
void draw(){
  background(255);
  stroke(0xFF70E320);
  strokeWeight(100);
  fatLine(width-mouseX,height-mouseY, mouseX, mouseY);
}

fatline.zip

… http://processing.org