GeneralPathTest.frink

View or download GeneralPathTest.frink in plain text format


// This class tests the GeneralPath class for drawing curves

g = new graphics

// Draw a letter "P" as in the Snellen eye chart.
p = new filledGeneralPath
p.moveTo[0,0]
p.lineTo[3.5,0]
p.circularArc[3.5, 1.5, -180 degrees]
p.lineTo[2,3]
p.lineTo[2,4]
p.lineTo[3,4]
p.lineTo[3,4]
p.lineTo[3,5]
p.lineTo[0,5]
p.lineTo[0,4]
p.lineTo[1,4]
p.lineTo[1,1]
p.lineTo[0,1]
p.close[]

// Jump to the inside of the bowl of the P and draw it.

/* The version below works except for in the HTMLRenderer because of the
   stupid non-zero winding rule. (Other renderers implement even-odd winding
   rule.) 
   Have to kludge it to work around the lack of even-odd winding rule by
   drawing in the opposite direction.
*/

/*p.moveTo[2,1]
p.lineTo[3.5,1]
p.circularArc[3.5, 1.5, -180 degrees]
p.lineTo[2,2]*/


// Alternate version that works with stupid non-zero winding rule
p.moveTo[2,2]
p.lineTo[3.5,2]
p.circularArc[3.5, 1.5, 180 degrees]
p.lineTo[2,1]
p.close[]

g.add[p]

// Draw a letter "O".  Note that this works in the HTML5 renderer and its
// stupid non-zero winding rule because Frink has tried to kludge a workaround
// that alternates the drawing direction of ellipses so that you have a hope
// of rendering properly.  I shall repeat again that HTML5 will be a stupid
// failure if it doesn't allow the even-odd winding rule for paths and
// self-intersecting polygons.
p2 = new filledGeneralPath
p2.ellipseSides[6,0,11,5]
p2.ellipseSides[7,1,10,4]
g.add[p2]

// Draw a letter "D"
p3 = new filledGeneralPath
p3.moveTo[12, 0]
p3.lineTo[14.5, 0]
p3.circularArc[14.5, 2.5, -180 deg]
p3.lineTo[12, 5]
p3.lineTo[12, 4]
p3.lineTo[13, 4]
p3.lineTo[13, 1]
p3.lineTo[12, 1]
p3.close[]

// Jump to inside of "D"
p3.moveTo[14,1]
p3.lineTo[14.5, 1]
p3.circularArc[14.5, 2.5, -180 deg]
p3.lineTo[14, 4]
p3.close[]
g.add[p3]

p4 = new filledGeneralPath
p4.ellipseSides[18,0,21,5]
p4.ellipseSides[19,1,20,4]
g.add[p4]

g.show[]
g.write["path.svg", 500, 500]
g.write["path.jpg", 500, 500]
g.write["path.html", 500, 500]
browse["path.html"]
browse["path.svg"]
//g.print[]


View or download GeneralPathTest.frink in plain text format


This is a program written in the programming language Frink.
For more information, view the Frink Documentation or see More Sample Frink Programs.

Alan Eliasen was born 17418 days, 22 hours, 52 minutes ago.