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Changed zoom levels

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This commit is contained in:
Tatu Peltola 2016-06-07 22:55:58 +03:00
parent 6df72f3a98
commit e3a51a45f3
1 changed files with 4 additions and 2 deletions
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6
htdocs/openwebrx.js
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@ -1019,7 +1019,7 @@ function canvas_mousewheel(evt)
zoom_max_level_hps=33; //Hz/pixel zoom_max_level_hps=33; //Hz/pixel
zoom_levels_count=5; zoom_levels_count=14;
function get_zoom_coeff_from_hps(hps) function get_zoom_coeff_from_hps(hps)
{ {
@ -1041,8 +1041,10 @@ function mkzoomlevels()
zoom_levels=[1]; zoom_levels=[1];
maxc=get_zoom_coeff_from_hps(zoom_max_level_hps); maxc=get_zoom_coeff_from_hps(zoom_max_level_hps);
if(maxc<1) return; if(maxc<1) return;
// logarithmic interpolation
zoom_ratio = Math.pow(maxc, 1/zoom_levels_count);
for(i=1;i<zoom_levels_count;i++) for(i=1;i<zoom_levels_count;i++)
zoom_levels.push(1+(maxc-1)*(i/(zoom_levels_count-1))); zoom_levels.push(Math.pow(zoom_ratio, i));
} }
function zoom_step(out, where, onscreen) function zoom_step(out, where, onscreen)