mirror of https://github.com/espruino/BangleApps
35 lines
806 B
JavaScript
35 lines
806 B
JavaScript
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g.clear();
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g.setColor(0,0.5,1);
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g.fillCircle(120,130,80,80);
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g.setColor(0,0,0);
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g.fillCircle(120,130,70,70);
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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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g.setColor(c);
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g.fillPoly([
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120+60*Math.sin(r), 130-60*Math.cos(r),
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120+10*Math.sin(r+p), 130-10*Math.cos(r+p),
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120+10*Math.sin(r+-p), 130-10*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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g.setFont("6x8",3);
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g.setColor(0);
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g.fillRect(70,0,170,24);
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g.setColor(0xffff);
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g.setFontAlign(0,0);
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g.drawString(isNaN(m.heading)?"---":Math.round(m.heading),120,12);
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g.setColor(0,0,0);
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arrow(oldHeading,0);
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arrow(oldHeading+180,0);
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arrow(m.heading,0xF800);
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arrow(m.heading+180,0x001F);
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oldHeading = m.heading;
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});
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Bangle.setCompassPower(1);
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