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I am trying to map an image to a "3d" grid that simulates cloth using strokeStyle and canvas, i have the image included but it is currently acting as a background image and not actually flowing with the "cloth" as is ripples, I.E the image is static as the grid flows. here's the jsfiddle which is self explanatory ( only works in Chrome). any help is much appreciated. here is the javascript that renders the image into the background, How do i stop from rendering as a background image and only make it fill the grid?: 

function update() {

    var img = new Image();
    img.src = 'http://free-textures.got3d.com/architectural/free-stone-wall-   textures/images/free-stone-wall-texture-002.jpg';
    img.onload = function() {

        // create pattern
        var ptrn = ctx.createPattern(img, 'repeat');

        ctx.clearRect(0, 0, canvas.width, canvas.height);

        physics.update();

        ctx.strokeStyle = ptrn;
        ctx.beginPath();
        var i = points.length;
        while (i--) points[i].draw();
        ctx.stroke();

        requestAnimFrame(update);
    }
}

Hers's the original codepen I'm working from. `updated fiddle with image outside function update(): It currently seems to actually fill the cells as well as applying it as a background image. is there any way to stop it becoming a background image and only apply it to fill the grid? I've tried this:
ctx.fillStyle = ptrn; and removing line 260:
ctx.strokeStyle = ptrn; but it seems to remove the background image just displaying it as a black grid... thank you again for the patience

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33
于 2013-04-17T04:34:52.450 回答