implement sun

2022-02-13 00:52:32 +01:00
parent 9e0045f807
commit 77fd18af31
17 changed files with 188 additions and 24 deletions
@@ -16,4 +16,67 @@ window.MathHelper = class {
        return degree * (Math.PI / 180);
    };

+    static calculateCelestialAngle(time, partialTicks) {
+        let modTime = (time % 24000);
+        let angle = (modTime + partialTicks) / 24000.0 - 0.25;
+
+        if (angle < 0.0) {
+            angle++;
+        }
+        if (angle > 1.0) {
+            angle--;
+        }
+
+        angle = 1.0 - ((Math.cos(angle * Math.PI) + 1.0) / 2.0);
+        angle = angle + (angle - angle) / 3.0;
+
+        return angle;
+    }
+
+    static hsbToRgb(hue, saturation, brightness) {
+        let r = 0, g = 0, b = 0;
+        if (saturation === 0) {
+            r = g = b = Math.floor(brightness * 255.0 + 0.5);
+        } else {
+            let h = (hue - Math.floor(hue)) * 6.0;
+            let f = h - Math.floor(h);
+            let p = brightness * (1.0 - saturation);
+            let q = brightness * (1.0 - saturation * f);
+            let t = brightness * (1.0 - (saturation * (1.0 - f)));
+            switch (Math.floor(h)) {
+                case 0:
+                    r = Math.floor(brightness * 255.0 + 0.5);
+                    g = Math.floor(t * 255.0 + 0.5);
+                    b = Math.floor(p * 255.0 + 0.5);
+                    break;
+                case 1:
+                    r = Math.floor(q * 255.0 + 0.5);
+                    g = Math.floor(brightness * 255.0 + 0.5);
+                    b = Math.floor(p * 255.0 + 0.5);
+                    break;
+                case 2:
+                    r = Math.floor(p * 255.0 + 0.5);
+                    g = Math.floor(brightness * 255.0 + 0.5);
+                    b = Math.floor(t * 255.0 + 0.5);
+                    break;
+                case 3:
+                    r = Math.floor(p * 255.0 + 0.5);
+                    g = Math.floor(q * 255.0 + 0.5);
+                    b = Math.floor(brightness * 255.0 + 0.5);
+                    break;
+                case 4:
+                    r = Math.floor(t * 255.0 + 0.5);
+                    g = Math.floor(p * 255.0 + 0.5);
+                    b = Math.floor(brightness * 255.0 + 0.5);
+                    break;
+                case 5:
+                    r = Math.floor(brightness * 255.0 + 0.5);
+                    g = Math.floor(p * 255.0 + 0.5);
+                    b = Math.floor(q * 255.0 + 0.5);
+                    break;
+            }
+        }
+        return 0xff000000 | (r << 16) | (g << 8) | (b << 0);
+    }
+
 }