HTML5 Game - Making the gradient line match a desired shape

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  3. Canvas
  4. Linear Gradient

Description

Making the gradient line match a desired shape

Demo

ResultView the demo in separate window 

<!DOCTYPE HTML>
<html>
    <head>
        <title>Example</title>
        <style>
            canvas {border: thin solid black; margin: 4px}
        </style>
    </head>
    <body>
        <canvas id="canvas" width="500" height="140">
            Your browser doesn't support the <code>canvas</code> element
        </canvas>
        <script>
            let ctx = document.getElementById("canvas").getContext("2d");

            let grad = ctx.createLinearGradient(10, 10, 60, 60);
            grad.addColorStop(0, "red");
            grad.addColorStop(0.5, "white");
            grad.addColorStop(1, "black");
            /*  w w  w  .  j a  v a 2s.  com*/
            ctx.fillStyle = grad;
            ctx.fillRect(0, 0, 500, 140);            
        </script>
    </body>
</html>

The following code matches the rectangle to the gradient.

Demo

ResultView the demo in separate window 

<!DOCTYPE HTML>
<html>
    <head>
        <title>Example</title>
        <style>
            canvas {border: thin solid black; margin: 4px}
        </style>
    </head>
    <body>
        <canvas id="canvas" width="500" height="140">
            Your browser doesn't support the <code>canvas</code> element
        </canvas>
        <script>
            let ctx = document.getElementById("canvas").getContext("2d");

            let grad = ctx.createLinearGradient(10, 10, 60, 60);
            grad.addColorStop(0, "red");
            grad.addColorStop(0.5, "white");
            grad.addColorStop(1, "black");
            //from www . j a va  2s. co  m
            ctx.fillStyle = grad;
            ctx.fillRect(10, 10, 50, 50);            
        </script>
    </body>
</html>

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