glm.funcExponential Maven / Gradle / Ivy

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package glm;

/**
 *
 * @author elect
 */
abstract class funcExponential extends FuncCommon {

    public static float exp(float x) {
        return (float) Math.exp(x);
    }

    public static float exp2(float x) {
        return (float) Math.pow(2, x);
    }

    public static float inverseSqrt(float x) {
        float xhalf = 0.5f * x;
        int i = Float.floatToIntBits(x);
        i = 0x5f3759df - (i >> 1);
        x = Float.intBitsToFloat(i);
        x = x * (1.5f - xhalf * x * x);
        return x;
    }

    public static float log(float x) {
        return (float) Math.log(x);
    }

    public static int log2(int value) {
        return (int) (Math.log(value) / Math.log(2));
    }

    public static float pow(float x, float y) {
        return (float) Math.pow(x, y);
    }

    public static float sqrt(float x) {
        return (float) Math.sqrt(x);
    }
}