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moved arrow_img to global scope, so it is nit loaded on every drawCompass() call, set min change to 9 degrees

master
hughbarney 2021-02-25 22:04:32 +00:00
parent 37d45d2618
commit f76eb21f38
1 changed files with 3 additions and 4 deletions
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7
apps/waypointer/app.js
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@ -5,6 +5,7 @@ var pal_bb = new Uint16Array([0x0000,0x07ff],0,1); // black, blue
// having 3 2 color pallette keeps the memory requirement lower
var buf1 = Graphics.createArrayBuffer(160,160,1, {msb:true});
var buf2 = Graphics.createArrayBuffer(80,40,1, {msb:true});
var arrow_img = require("heatshrink").decompress(atob("lEowIPMjAEDngEDvwED/4DCgP/wAEBgf/4AEBg//8AEBh//+AEBj///AEBn///gEBv///wmCAAImCAAIoBFggE/AkaaEABo="));
function flip1(x,y) {
g.drawImage({width:160,height:160,bpp:1,buffer:buf1.buffer, palette:pal_by},x,y);
@ -46,17 +47,15 @@ function clear_previous() {
function drawCompass(course) {
if(!candraw) return;
if (Math.abs(previous.course - course) < 12) return; // reduce number of draws due to compass jitter
if (Math.abs(previous.course - course) < 9) return; // reduce number of draws due to compass jitter
previous.course = course;
var img = require("heatshrink").decompress(atob("lEowIPMjAEDngEDvwED/4DCgP/wAEBgf/4AEBg//8AEBh//+AEBj///AEBn///gEBv///wmCAAImCAAIoBFggE/AkaaEABo="));
buf1.setColor(1);
buf1.fillCircle(80,80,79,79);
buf1.setColor(0);
buf1.fillCircle(80,80,69,69);
buf1.setColor(1);
buf1.drawImage(img, 80, 80, {scale:3, rotate:radians(course)} );
buf1.drawImage(arrow_img, 80, 80, {scale:3, rotate:radians(course)} );
flip1(40, 30);
}