io.github.opencubicchunks.cubicchunks.api.util

Class MathUtil

java.lang.Object

io.github.opencubicchunks.cubicchunks.api.util.MathUtil

@ParametersAreNonnullByDefault
 @MethodsReturnNonnullByDefault
public class MathUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
MathUtil()

Method Summary

Modifier and Type	Method and Description
static double	bellCurveProbabilityCyclic(int x, int mean, double stdDev, int spacing) Generates a gaussian probability with the curves repeatedly positioned in a set distance to each other's center.
static int	ceilDiv(int a, int b)
static double	gaussianProbabilityDensity(double x, double mean, double stdDev)
static boolean	isPowerOfN(int toTest, int n)
static double	lerp(double a, double min, double max)
static float	lerp(float a, float min, float max)
static int	max(int... a)
static int	max(int a, int b)
static int	max(int a, int b, int c)
static int	max(int a, int b, int c, int d)
static float	maxIgnoreNan(float... a)
static int	min(int... a)
static int	min(int a, int b)
static int	min(int a, int b, int c)
static int	min(int a, int b, int c, int d)
static int	packColorARGB(int r, int g, int b, int a)
static boolean	rangesIntersect(int min1, int max1, int min2, int max2)
static int	to8bitComponent(float value) Converts normalized 0-1 color component to 8-bit integer
static double	unlerp(double v, double min, double max)
static float	unlerp(float v, float min, float max)
static float	unlerp(long v, long min, long max)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MathUtil

public MathUtil()

Method Detail

ceilDiv

public static int ceilDiv(int a,
                          int b)

isPowerOfN

public static boolean isPowerOfN(int toTest,
                                 int n)

lerp

public static double lerp(double a,
                          double min,
                          double max)

unlerp

public static double unlerp(double v,
                            double min,
                            double max)

unlerp

public static float unlerp(float v,
                           float min,
                           float max)

unlerp

public static float unlerp(long v,
                           long min,
                           long max)

lerp

public static float lerp(float a,
                         float min,
                         float max)

min

public static int min(int a,
                      int b)

min

public static int min(int a,
                      int b,
                      int c)

min

public static int min(int a,
                      int b,
                      int c,
                      int d)

min

public static int min(int... a)

max

public static int max(int a,
                      int b)

max

public static int max(int a,
                      int b,
                      int c)

max

public static int max(int a,
                      int b,
                      int c,
                      int d)

max

public static int max(int... a)

maxIgnoreNan

public static float maxIgnoreNan(float... a)

gaussianProbabilityDensity

public static double gaussianProbabilityDensity(double x,
                                                double mean,
                                                double stdDev)

bellCurveProbabilityCyclic

public static double bellCurveProbabilityCyclic(int x,
                                                int mean,
                                                double stdDev,
                                                int spacing)

Generates a gaussian probability with the curves repeatedly positioned in a set distance to each other's center. How it works: Modulo usually works from 0 to limit-1. Since the curve is located centered on 0, it has to be moved by limit/2 to the right. This is done by substracting "halfspace" from the factor. To have the ore still generated in the area it's supposed to, the location inside the modulo gets shifted by both the mean location of the first curve and back the "halfspace".

Parameters:

x - Value to be evaluated

mean - Center of the first curve

stdDev - Standard deviation

spacing - Distance between the centers of the curves

Returns:

gaussian probability

rangesIntersect

public static boolean rangesIntersect(int min1,
                                      int max1,
                                      int min2,
                                      int max2)

packColorARGB

public static int packColorARGB(int r,
                                int g,
                                int b,
                                int a)

to8bitComponent

public static int to8bitComponent(float value)

Converts normalized 0-1 color component to 8-bit integer

Parameters:

value - 0-1 color component

Returns:

8-bit (0-255) integer color component