mirror of https://github.com/espruino/BangleApps
42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
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exports.calibrate = () => {
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var max={x:-32000, y:-32000, z:-32000},
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min={x:32000, y:32000, z:32000};
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var ref = setInterval(()=>{
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var m = Bangle.getCompass();
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max.x = m.x>max.x?m.x:max.x;
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max.y = m.y>max.y?m.y:max.y;
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max.z = m.z>max.z?m.z:max.z;
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min.x = m.x<min.x?m.x:min.x;
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min.y = m.y<min.y?m.y:min.y;
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min.z = m.z<min.z?m.z:min.z;
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}, 100);
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return new Promise((resolve) => {
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setTimeout(()=>{
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if(ref) clearInterval(ref);
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var offset = {x:(max.x+min.x)/2,y:(max.y+min.y)/2,z:(max.z+min.z)/2};
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var delta = {x:(max.x-min.x)/2,y:(max.y-min.y)/2,z:(max.z-min.z)/2};
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var avg = (delta.x+delta.y+delta.z)/3;
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var scale = {x:avg/delta.x, y:avg/delta.y, z:avg/delta.z};
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resolve({offset:offset,scale:scale});
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},20000);
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});
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}
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exports.tiltfixread = (O,S) => {
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"ram"
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var m = Bangle.getCompass();
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var g = Bangle.getAccel();
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m.dx =(m.x-O.x)*S.x; m.dy=(m.y-O.y)*S.y; m.dz=(m.z-O.z)*S.z;
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var d = Math.atan2(-m.dx,m.dy)*180/Math.PI;
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if (d<0) d+=360;
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var phi = Math.atan(-g.x/-g.z);
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var cosphi = Math.cos(phi), sinphi = Math.sin(phi);
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var theta = Math.atan(-g.y/(-g.x*sinphi-g.z*cosphi));
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var costheta = Math.cos(theta), sintheta = Math.sin(theta);
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var xh = m.dy*costheta + m.dx*sinphi*sintheta + m.dz*cosphi*sintheta;
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var yh = m.dz*sinphi - m.dx*cosphi;
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var psi = Math.atan2(yh,xh)*180/Math.PI;
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if (psi<0) psi+=360;
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return psi;
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}
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