mirror of https://github.com/espruino/BangleApps
53 lines
1.2 KiB
JavaScript
53 lines
1.2 KiB
JavaScript
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var rx = 0, ry = 0;
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function draw() {
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var rcx=Math.cos(rx),
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rsx=Math.sin(rx),
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rcy=Math.cos(ry),
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rsy=Math.sin(ry);
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function p(x,y,z) {
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var t;
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t = x*rcy + z*rsy;
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z = z*rcy - x*rsy;
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x=t;
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t = y*rcx + z*rsx;
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z = z*rcx - y*rsx;
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y=t;
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z += 4;
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return [g.getWidth() * (0.5 + x/z), g.getHeight() * (0.5 + y/z)];
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}
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var a;
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a = p(-1,-1,-1); g.moveTo(a[0],a[1]);
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a = p(1,-1,-1); g.lineTo(a[0],a[1]);
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a = p(1,1,-1); g.lineTo(a[0],a[1]);
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a = p(-1,1,-1); g.lineTo(a[0],a[1]);
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a = p(-1,-1,-1); g.lineTo(a[0],a[1]);
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a = p(-1,-1,1); g.moveTo(a[0],a[1]);
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a = p(1,-1,1); g.lineTo(a[0],a[1]);
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a = p(1,1,1); g.lineTo(a[0],a[1]);
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a = p(-1,1,1); g.lineTo(a[0],a[1]);
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a = p(-1,-1,1); g.lineTo(a[0],a[1]);
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a = p(-1,-1,-1); g.moveTo(a[0],a[1]);
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a = p(-1,-1,1); g.lineTo(a[0],a[1]);
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a = p(1,-1,-1); g.moveTo(a[0],a[1]);
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a = p(1,-1,1); g.lineTo(a[0],a[1]);
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a = p(1,1,-1); g.moveTo(a[0],a[1]);
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a = p(1,1,1); g.lineTo(a[0],a[1]);
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a = p(-1,1,-1); g.moveTo(a[0],a[1]);
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a = p(-1,1,1); g.lineTo(a[0],a[1]);
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}
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function step() {
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// rotate
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rx += 0.1;
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ry += 0.11;
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// draw
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g.clear();
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g.setColor(0xFFFF);
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draw();
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}
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g.clear();
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setInterval(step,50);
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