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diff --git a/includes/js/dojox/gfx/tests/test_bezier.html b/includes/js/dojox/gfx/tests/test_bezier.html new file mode 100644 index 0000000..bcee2d0 --- /dev/null +++ b/includes/js/dojox/gfx/tests/test_bezier.html @@ -0,0 +1,85 @@ +<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" > +<head> +<title>Approximation of an arc with bezier</title> +<style type="text/css"> + @import "../../../dojo/resources/dojo.css"; + @import "../../../dijit/tests/css/dijitTests.css"; +</style> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> +<!-- +The next line should include Microsoft's Silverligth.js, if you plan to use the silverlight backend +<script type="text/javascript" src="Silverlight.js"></script> +--> +<script type="text/javascript" src="../../../dojo/dojo.js" djConfig="isDebug: true"></script> +<script type="text/javascript" src="../_base.js"></script> +<script type="text/javascript" src="../shape.js"></script> +<script type="text/javascript" src="../path.js"></script> +<script type="text/javascript" src="../arc.js"></script> +<!--<script type="text/javascript" src="../vml.js"></script>--> +<!--<script type="text/javascript" src="../svg.js"></script>--> +<!--<script type="text/javascript" src="../canvas.js"></script>--> +<!--<script type="text/javascript" src="../silverlight.js"></script>--> +<script type="text/javascript"> +dojo.require("dojox.gfx"); + +makeShapes = function(){ + var surface = dojox.gfx.createSurface("test", 500, 300); + var g = surface.createGroup(); + + // create a reference ellipse + var rx = 200; + var ry = 100; + var startAngle = -30; + var arcAngle = -90; + var axisAngle = -30; + var e = g.createEllipse({rx: rx, ry: ry}).setStroke({}); + + // calculate a bezier + var alpha = dojox.gfx.matrix._degToRad(arcAngle) / 2; // half of our angle + var cosa = Math.cos(alpha); + var sina = Math.sin(alpha); + // start point + var p1 = {x: cosa, y: sina}; + // 1st control point + var p2 = {x: cosa + (4 / 3) * (1 - cosa), y: sina - (4 / 3) * cosa * (1 - cosa) / sina}; + // 2nd control point (symmetric to the 1st one) + var p3 = {x: p2.x, y: -p2.y}; + // end point (symmetric to the start point) + var p4 = {x: p1.x, y: -p1.y}; + + // rotate and scale poins as appropriate + var s = dojox.gfx.matrix.normalize([dojox.gfx.matrix.scale(e.shape.rx, e.shape.ry), dojox.gfx.matrix.rotateg(startAngle + arcAngle / 2)]); + p1 = dojox.gfx.matrix.multiplyPoint(s, p1); + p2 = dojox.gfx.matrix.multiplyPoint(s, p2); + p3 = dojox.gfx.matrix.multiplyPoint(s, p3); + p4 = dojox.gfx.matrix.multiplyPoint(s, p4); + // draw control trapezoid + var t = g.createPath().setStroke({color: "blue"}); + t.moveTo(p1.x, p1.y); + t.lineTo(p2.x, p2.y); + t.lineTo(p3.x, p3.y); + t.lineTo(p4.x, p4.y); + t.lineTo(p1.x, p1.y); + t.moveTo((p1.x + p4.x) / 2, (p1.y + p4.y) / 2); + t.lineTo((p2.x + p3.x) / 2, (p2.y + p3.y) / 2); + t.moveTo((p1.x + p2.x) / 2, (p1.y + p2.y) / 2); + t.lineTo((p3.x + p4.x) / 2, (p3.y + p4.y) / 2); + // draw a bezier + var b = g.createPath().setStroke({color: "red"}); + b.moveTo(p1.x, p1.y); + b.curveTo(p2.x, p2.y, p3.x, p3.y, p4.x, p4.y); + // move everything in a middle + g.setTransform([dojox.gfx.matrix.translate(250, 150), dojox.gfx.matrix.rotateg(axisAngle)]); +}; + +dojo.addOnLoad(makeShapes); + +</script> +</head> +<body> +<h1>Approximation of an arc with bezier</h1> +<!--<p><button onclick="makeShapes();">Make</button></p>--> +<div id="test" style="width: 500px; height: 300px;"></div> +<p>That's all Folks!</p> +</body> +</html> |