RobinNixon
60 lines
1.6 KiB
HTML
60 lines
1.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Clipping Areas (b)</title>
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<script src='OSC.js'></script>
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</head>
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<body>
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<canvas id='mycanvas' width='640' height='480'></canvas>
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<script>
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canvas = O('mycanvas')
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context = canvas.getContext('2d')
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S(canvas).background = 'lightblue'
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context.fillStyle = 'white'
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context.strokeRect(20, 20, 600, 440) // Black border
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context.fillRect( 20, 20, 600, 440) // White background
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context.beginPath()
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for (j = 0 ; j < 10 ; ++j)
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{
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context.moveTo(20, j * 48)
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context.lineTo(620, j * 48)
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context.lineTo(620, j * 48 + 30)
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context.lineTo(20, j * 48 + 30)
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}
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context.clip()
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context.closePath()
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context.fillStyle = 'blue' // Blue sky
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context.fillRect(20, 20, 600, 320)
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context.fillStyle = 'green' // Green grass
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context.fillRect(20, 320, 600, 140)
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context.strokeStyle = 'orange'
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context.fillStyle = 'yellow'
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orig = 170
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points = 21
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dist = Math.PI / points * 2
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scale1 = 130
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scale2 = 80
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context.beginPath()
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for (j = 0 ; j < points ; ++j)
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{
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x = Math.sin(j * dist)
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y = Math.cos(j * dist)
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context.lineTo(orig + x * scale1, orig + y * scale1)
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context.lineTo(orig + x * scale2, orig + y * scale2)
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}
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context.closePath()
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context.stroke() // Sun outline
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context.fill() // Sun fill
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</script>
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</body>
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</html>
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