Base Site Upload

js/utillib.js

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