mirror of https://github.com/espruino/BangleApps
61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
var tg = Graphics.createArrayBuffer(120,20,1,{msb:true});
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var timg = {
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width:tg.getWidth(),
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height:tg.getHeight(),
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bpp:1,
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buffer:tg.buffer
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};
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var ag = Graphics.createArrayBuffer(160,160,2,{msb:true});
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var aimg = {
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width:ag.getWidth(),
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height:ag.getHeight(),
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bpp:2,
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buffer:ag.buffer,
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palette:new Uint16Array([0,0x03FF,0xF800,0x001F])
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};
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ag.setColor(1);
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ag.fillCircle(80,80,79,79);
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ag.setColor(0);
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ag.fillCircle(80,80,69,69);
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function arrow(r,c) {
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r=r*Math.PI/180;
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var p = Math.PI/2;
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ag.setColor(c);
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ag.fillPoly([
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80+60*Math.sin(r), 80-60*Math.cos(r),
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80+10*Math.sin(r+p), 80-10*Math.cos(r+p),
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80+10*Math.sin(r-p), 80-10*Math.cos(r-p),
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]);
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}
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var oldHeading = 0;
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Bangle.on('mag', function(m) {
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if (!Bangle.isLCDOn()) return;
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tg.clear();
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tg.setFont("6x8",1);
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tg.setColor(1);
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if (isNaN(m.heading)) {
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tg.setFontAlign(0,-1);
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tg.setFont("6x8",1);
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tg.drawString("Uncalibrated",60,4);
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tg.drawString("turn 360° around",60,12);
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}
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else {
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tg.setFontAlign(0,0);
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tg.setFont("6x8",2);
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tg.drawString(Math.round(m.heading),60,12);
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}
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g.drawImage(timg,0,0,{scale:2});
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ag.setColor(0);
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arrow(oldHeading,0);
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arrow(oldHeading+180,0);
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arrow(m.heading,2);
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arrow(m.heading+180,3);
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g.drawImage(aimg,40,50);
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oldHeading = m.heading;
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});
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Bangle.setCompassPower(1);
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