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Sketcher - drawing with cornerContour

Setup a pen

pen2D = new Pen2D( 0xFFFF00FF );

Setup sketcher

we can draw say a triangle.

var sketcher = new Sketcher( pen2D, StyleSketch.Fine, StyleEndLine.both );
sketcher.width = 2;

Use sketcher to draw an SVG path

var p = new SvgPath( sketcher );
p.parse( "M150 0 L75 200 L225 200 Z" );

Use sketcher to draw a shape

// a
sketcher.moveTo( 148, 72 );
sketcher.quadThru( 157, 67, 166, 64 );
sketcher.quadThru( 173, 67, 181, 72 );
sketcher.lineTo( 181, 103 );
sketcher.quadThru( 183, 107, 186, 103 );
sketcher.moveTo( 181, 80 );
sketcher.quadThru( 173, 82, 166, 85);
sketcher.quadThru( 155, 90, 148, 101 ); 
sketcher.lineTo( 149, 103 );
sketcher.quadThru( 157, 106, 166, 107 );
sketcher.quadThru( 173, 105, 181, 97 );

Draw Commands

  • moveTo( x, y );
  • lineTo( x, y );
  • quadTo( cx, cy, x, y );
  • quadThru( thruX, thruY, x, y );
  • curveTo( c1x, c1y, c2x, c2y, x, y );
  • plotCoord( arrFloat );
  • getEdges();

Sketcher has two options to control the algorithm for drawing lines and curves.

StyleSketch, how you join lines, with only drawing curves you may find fine is overkill.

  • Fine, has arc on outside between lines
  • Medium, has triangle betteen lines
  • Coarse, lines overlap but don't meet together nicely.

some other options exist like fill and tracer.

StyleEndLine, used to work fine, but needs tweaking.

  • no, no curve at end of line.
  • begin, curve only at beginning of lines ( or when moveTo happens ).
  • end, curve only at end of lines ( or when moveTo happens ).
  • both, curve at both ended of the lines.