112 lines
4.9 KiB
HTML
112 lines
4.9 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test Reflection and Projection matrices</title>
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<style>
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@import "../../../dojo/resources/dojo.css";
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@import "../../../dijit/themes/tundra/tundra.css";
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</style>
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<script src="../../../dojo/dojo.js" djConfig="isDebug: true, parseOnLoad: true"></script>
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<script>
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dojo.require("dojox.gfx");
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dojo.require("dojo.colors");
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dojo.require("dijit.form.HorizontalSlider");
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dojo.require("dijit.form.HorizontalRule");
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dojo.require("dijit.form.HorizontalRuleLabels");
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var W = 500, H = 500, MARKER_SIZE = 5;
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function makeGrid(group, size, step, stroke){
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var g = group.createGroup();
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stroke = stroke || {color: [0, 0, 0, 0.1], width: 1};
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for(var i = step; i < size; i += step){
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g.createLine({x1: 0, y1: i, x2: size, y2: i}).setStroke(stroke);
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g.createLine({x1: i, y1: 0, x2: i, y2: size}).setStroke(stroke);
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}
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g.createRect({x: 0, y: 0, width: size - 1, height: size -1}).setStroke("black");
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return g;
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}
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var surface, shape, line = {x1: 0, y1: 0, x2: W, y2: H},
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rm, pm, pt, rpt, ppt, point, rpoint, ppoint, rline, pline;
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function updatePoints(){
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// get all transforms
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rm = dojox.gfx.matrix.reflect(line.x2, line.y2);
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pm = dojox.gfx.matrix.project(line.x2, line.y2);
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// update points and lines
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if(point){
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rpt = dojox.gfx.matrix.multiplyPoint(rm, pt);
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ppt = dojox.gfx.matrix.multiplyPoint(pm, pt);
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point.setShape({cx: pt.x, cy: pt.y, r: MARKER_SIZE});
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rpoint.setShape({cx: rpt.x, cy: rpt.y, r: MARKER_SIZE});
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ppoint.setShape({cx: ppt.x, cy: ppt.y, r: MARKER_SIZE});
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rline.setShape({x1: pt.x, y1: pt.y, x2: rpt.x, y2: rpt.y});
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pline.setShape({x1: pt.x, y1: pt.y, x2: ppt.x, y2: ppt.y});
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}
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}
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function shiftVector(value){
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// update the line
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if(value < 0){
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line.y2 = H;
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line.x2 = W + (W / 100) * value;
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}else{
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line.x2 = W;
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line.y2 = H - (H / 100) * value;
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}
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shape.setShape(line);
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updatePoints();
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}
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function setPoint(e){
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var bbox = dojo.position("surf", true);
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pt = {x: e.pageX - bbox.x, y: e.pageY - bbox.y};
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if(!point){
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point = surface.createCircle({cx: 0, cy: 0, r: MARKER_SIZE}).
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setStroke("black").setFill("yellow");
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rpoint = surface.createCircle({cx: 0, cy: 0, r: MARKER_SIZE}).
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setStroke("black").setFill("red");
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ppoint = surface.createCircle({cx: 0, cy: 0, r: MARKER_SIZE}).
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setStroke("black").setFill("green");
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rline = surface.createLine({x1: 0, y1: 0, x2: 0, y2: 0}).
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setStroke("red");
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pline = surface.createLine({x1: 0, y1: 0, x2: 0, y2: 0}).
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setStroke({color: "green", style: "dash"});
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}
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updatePoints();
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}
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run = function(surface){
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makeGrid(surface, W, 50);
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shape = surface.createLine(line).setStroke("black");
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dojo.connect(dijit.byId("shifter"), "onChange", shiftVector);
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dojo.connect(dojo.byId("surf"), "onclick", setPoint);
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shiftVector(0);
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};
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createSurface = function(){
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surface = dojox.gfx.createSurface("surf", W, H);
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surface.whenLoaded(run);
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};
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dojo.addOnLoad(createSurface);
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</script>
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</head>
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<body class="tundra">
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<h1>Test Reflection and Projection matrices</h1>
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<div id="shifter" dojoType="dijit.form.HorizontalSlider"
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value="0" minimum="-100" maximum="100" value="0" discreteValues="21" showButtons="false" intermediateChanges="true" style="width: 500px;">
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<div dojoType="dijit.form.HorizontalRule" container="topDecoration" count="21" style="height: 5px;"></div>
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<div dojoType="dijit.form.HorizontalRule" container="bottomDecoration" count="5" style="height: 5px;"></div>
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<div dojoType="dijit.form.HorizontalRuleLabels" container="bottomDecoration" labels="-100,-50,0,50,100" style="height: 1.2em; font-size: 75%; color: gray;"></div>
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</div>
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<div id="surf"></div>
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<p>Legend: <span style="background: yellow;">yellow</span> is your point, <span style="color: red;">red</span> is a reflected point,
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<span style="color: green;">green</span> is a projected point.</p>
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<p>Click anywhere on the surface to set a point and see its reflection and projection.</p>
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</body>
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</html>
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