| 3 | import net.minecraft.util.MathHelper; |
| 4 | |
| 5 | public class MathUtils |
| 6 | { |
| 7 | public static final float PI = (float)Math.PI; |
| 8 | public static final float PI2 = ((float)Math.PI * 2F); |
| 9 | public static final float PId2 = ((float)Math.PI / 2F); |
| 10 | private static final float[] ASIN_TABLE = new float[65536]; |
| 11 | |
| 12 | public static float asin(float value) |
| 13 | { |
| 14 | return ASIN_TABLE[(int)((double)(value + 1.0F) * 32767.5D) & 65535]; |
| 15 | } |
| 16 | |
| 17 | public static float acos(float value) |
| 18 | { |
| 19 | return ((float)Math.PI / 2F) - ASIN_TABLE[(int)((double)(value + 1.0F) * 32767.5D) & 65535]; |
| 20 | } |
| 21 | |
| 22 | public static int getAverage(int[] vals) |
| 23 | { |
| 24 | if (vals.length <= 0) |
| 25 | { |
| 26 | return 0; |
| 27 | } |
| 28 | else |
| 29 | { |
| 30 | int i = getSum(vals); |
| 31 | int j = i / vals.length; |
| 32 | return j; |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | public static int getSum(int[] vals) |
| 37 | { |
| 38 | if (vals.length <= 0) |
| 39 | { |
| 40 | return 0; |
| 41 | } |
| 42 | else |
| 43 | { |
| 44 | int i = 0; |
| 45 | |
| 46 | for (int j = 0; j < vals.length; ++j) |
| 47 | { |
| 48 | int k = vals[j]; |
| 49 | i += k; |
| 50 | } |
| 51 | |
| 52 | return i; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | public static int roundDownToPowerOfTwo(int val) |
| 57 | { |
| 58 | int i = MathHelper.roundUpToPowerOfTwo(val); |
| 59 | return val == i ? i : i / 2; |
| 60 | } |
| 61 | |
| 62 | public static boolean equalsDelta(float f1, float f2, float delta) |