add ceil and Limits

Author: SenseiTarzan

src/main/java/org/sculk/math/Limits.java

@@ -0,0 +1,9 @@
+package org.sculk.math;
+
+public class Limits {
+
+    public static final int UINT16_MAX = 0xFFFF;
+    public static final int UINT16_MIN = 0;
+    public static final int UINT32_MAX = 0xFFFFFFFF;
+    public static final int UINT32_MIN = 0;
+}

src/main/java/org/sculk/math/SculkMath.java

@@ -17,21 +17,62 @@
  */
 public class SculkMath {
 
-    public static long log2(long N)
-    {
+    private static final float[] trigonometry = new float[Limits.UINT16_MAX + 1];
+
+    static final double M_2PI = Math.PI * 2.0D;
+
+    static final double M_PI2 = Math.PI / 2.0D;
 
-        // calculate log2 N indirectly
-        // using log() method
+    static {
+        int short_max1 = Limits.UINT16_MAX + 1;
+        for (int i = 0; i < short_max1; i++)
+            trigonometry[i] = (float) Math.sin(i * M_2PI / short_max1);
+    }
+
+    public static float sqrt(float paramFloat) {
+        return (float) Math.sqrt(paramFloat);
+    }
+
+    public static float sin(float paramFloat) {
+        return trigonometry[((int) (paramFloat * 10430.378F) & Limits.UINT16_MAX)];
+    }
+
+    public static float cos(float paramFloat) {
+        return trigonometry[((int) (paramFloat * 10430.378F + 16384.0F) & Limits.UINT16_MAX)];
+    }
+
+    public static float sin(double paramFloat) {
+        return trigonometry[((int) (paramFloat * 10430.378F) & Limits.UINT16_MAX)];
+    }
 
+    public static float cos(double paramFloat) {
+        return trigonometry[((int) (paramFloat * 10430.378F + 16384.0F) & Limits.UINT16_MAX)];
+    }
+
+    public static long log2(long N)
+    {
         return (long)(Math.log(N) / Math.log(2));
     }
 
     public static int log2(int N)
     {
+        return (int)(Math.log(N) / Math.log(2));
+    }
+
+    public static int ceil(float value)
+    {
+        int truncate = (int) value;
+        return value > truncate ? truncate + 1 : truncate;
+    }
+    public static int clamp(int check, int min, int max) {
+        return check > max ? max : (Math.max(check, min));
+    }
 
-        // calculate log2 N indirectly
-        // using log() method
+    public static double denormalizeClamp(double lowerBnd, double upperBnd, double slide) {
+        return slide < 0.0D ? lowerBnd : (slide > 1.0D ? upperBnd : lowerBnd + (upperBnd - lowerBnd) * slide);
+    }
 
-        return (int)(Math.log(N) / Math.log(2));
+    public static float denormalizeClamp(float lowerBnd, float upperBnd, float slide) {
+        return slide < 0.0f ? lowerBnd : (slide > 1.0f ? upperBnd : lowerBnd + (upperBnd - lowerBnd) * slide);
     }
 }