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8-transform-ortho2D.html
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<!DOCTYPE html>
<html>
<head>
<title>hwshen WebGL — code03 </title>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<!-- ************** Fragment Shader ************* -->
<script id="shader-fs" type="x-shader/x-fragment">
precision mediump float;
varying vec4 vColor;
void main(void) {
gl_FragColor = vColor;
}
</script>
<!-- ************** Vertex Shader ************* -->
<script id="shader-vs" type="x-shader/x-vertex">
attribute vec3 aVertexPosition;
attribute vec3 aVertexColor;
varying vec4 vColor;
uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;
void main(void) {
gl_PointSize = 10.0;
gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
vColor = vec4(aVertexColor,1.0);
}
</script>
<script type="text/javascript" src="shaders_setup.js"></script>
<script type="text/javascript" src="8-transform-ortho2D.js"></script>
</head>
<body onload="webGLStart();">
<canvas id="code03-canvas"style="border:none;"width="400"height="400"></canvas>
<h4> Projection: </h4>
<label for="input-left">Left: </label><input type="number" id="input-left" value="-100" onchange="updateProj()">
<label for="input-right">Right: <label><input type="number" id="input-right" value="100" onchange="updateProj()"><br>
<label for="input-bottom">Bottom: </label><input type="number" id="input-bottom" value="-100" onchange="updateProj()">
<label for="input-top">Top: <label><input type="number" id="input-top" value="100" onchange="updateProj()"><br>
<h4> Geometry: </h4>
<button onclick="geometry(0)"> POINTS</button>
<button onclick="geometry(1)"> LINEs</button>
<button onclick="geometry(2)"> FACES</button>
<h4> Background: </h4>
<button onclick="BG(1,0,0)"> Red</button>
<button onclick="BG(0,1,0)"> Green</button>
<button onclick="BG(0,0,1)"> Blue</button>
<button onclick="BG(0.5,0.5,0.5)"> Grey</button>
<button onclick="BG(0,0,0)"> Black</button>
<button onclick="BG(1,1,1)"> White</button>
<button onclick="clearAll();"> Clear</button>
<button onclick="drawScene();"> Redraw</button>
<div>
<h4>
Click on the left mouse button and move the coursor to rotate
</h4>
<button onclick="reset()"> Go Back! </button>
</div>
</body>
</html>