extend line with thickness

test_thick_lines.js

function draw_line(x1,y1,x2,y2,thickness){
  var p = [];
  var angle = Math.atan2(y2-y1,x2-x1);
  cosP = Math.cos(angle+Math.PI/2);
  cosM = Math.cos(angle-Math.PI/2);
  sinP = Math.sin(angle+Math.PI/2);
  sinM = Math.sin(angle-Math.PI/2);
  p[0] = (x1 + thickness*cosP +0.5)|0;
  p[1] = (y1 + thickness*sinP +0.5)|0;
  p[2] = (x1 + thickness*cosM +0.5)|0;
  p[3] = (y1 + thickness*sinM +0.5)|0;
  p[4] = (x2 + thickness*cosM +0.5)|0;
  p[5] = (y2 + thickness*sinM +0.5)|0;
  p[6] = (x2 + thickness*cosP +0.5)|0;
  p[7] = (y2 + thickness*sinP +0.5)|0;
  g.fillPoly(p,true);
}


function drawHouse(){

  var thick = (g.getWidth() *0.02 +0.5)|0;
  var sx = g.getWidth() * 0.25;
  var sy = g.getHeight() * 0.4;

  draw_line(sx,sy*2,sx*3,sy*2,thick);
  g.fillCircle(sx,sy*2,thick).flip();
  draw_line(sx*3,sy*2,sx*3,sy,thick);
  g.fillCircle(sx*3,sy*2,thick).flip();
  draw_line(sx*3,sy,sx*2,sy*0.33,thick);
  g.fillCircle(sx*3,sy,thick).flip();
  draw_line(sx*2,sy*0.33,sx,sy,thick);
  g.fillCircle(sx*2,sy*0.33,thick).flip();
  draw_line(sx,sy,sx,sy*2,thick);
  g.fillCircle(sx,sy,thick).flip();

}


  Bangle.setLCDMode();
  g.clear();
  g.setColor(1,0,0);
  drawHouse();