63 lines
1.5 KiB
JavaScript
63 lines
1.5 KiB
JavaScript
'use strict';
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const gradeIncrements = [
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0.0498,
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0.04,
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0.035,
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0.03,
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0.025,
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0.02,
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0.015,
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0.01,
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0.005,
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0.001
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]
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export function randomRange(min=0.0, max=1.0){
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return Math.random()*(max-min) + min;
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}
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export function rgba2hex(r,g,b,a=1.0){
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r = Math.min(Math.max(r,0),1);
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g = Math.min(Math.max(g,0),1);
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b = Math.min(Math.max(b,0),1);
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a = Math.min(Math.max(a,0),1);
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return `#${
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Math.round(r*255).toString(16).padStart(2, '0').substring(0,2)
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}${
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Math.round(g*255).toString(16).padStart(2, '0').substring(0,2)
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}${
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Math.round(b*255).toString(16).padStart(2, '0').substring(0,2)
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}${
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Math.round(a*255).toString(16).padStart(2, '0').substring(0,2)
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}`;
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}
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export function gradeToClass(grade){
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let result = '';
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for(let j=0; j<gradeIncrements.length; j++){
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if(grade > gradeIncrements[j]){
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result = `grade_${gradeIncrements.length-(j+1)}`;
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break;
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}
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}
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if(result) return result;
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}
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export function radiusToSpeed(radius){
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if(radius < 50) return 10;
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else if(radius < 70) return 20;
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else if(radius < 95) return 30;
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else if(radius < 130) return 40;
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else if(radius < 170) return 50;
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else if(radius < 230) return 60;
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else if(radius < 360) return 70;
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else if(radius < 700) return 80;
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else if(radius < 900) return 90;
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else if(radius < 1200) return 100;
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return 120;
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}
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export function clamp(v, min = 0, max = 1){
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return Math.max(Math.min(v, max), min);
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} |