WebFund 2014W Lecture 17
The video from the lecture given on March 14, 2014 is available:
adventure-editor-class is also available (without modules, you'll have to run "npm install" or copy node_modules from adventure-editor or similar application).
HTML Canvas Element
- Part of HTML5
- scriptable rendering of 2D shapes and bitmap images
<canvas id="example" width="200" height="200"> </canvas>
- We can use Javascript to draw on the canvas.
<script> // The following code draws a red box on the screen. var example = document.getElementById('example'); var context = example.getContext('2d'); context.fillStyle = 'red'; context.fillRect(30, 30, 50, 50)
//The following code draws a circle. context.beginPath(); context.arc(100, 75, 50, 0, 2 *Math.PI); context.stroke(); </script>
- Drawing a arc is similar in languages such as Processing.
- Arcs are defined by a center point, a radius, a starting angle, an ending angle, and the drawing direction (either clockwise or anticlockwise).