88 lines
2.4 KiB
C#
88 lines
2.4 KiB
C#
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#if UNITY_EDITOR
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using UnityEngine;
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namespace GSpawn
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{
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public static class MathEx
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{
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public static float roundCorrectError(float value, float eps)
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{
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// Round to whole
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float iVal = Mathf.Floor(value);
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if (Mathf.Abs(value - iVal) < eps) return iVal;
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float up = Mathf.Ceil(value);
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if (Mathf.Abs(value - up) < eps) return up;
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// Round to 0.75
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float sign = Mathf.Sign(value);
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iVal = (float)((int)value);
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float frac = (value - iVal);
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if (Mathf.Abs(frac - 0.75f * sign) < eps) return iVal + 0.75f * sign;
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// Round to 0.5
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if (Mathf.Abs(frac - 0.5f * sign) < eps) return iVal + 0.5f * sign;
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// Round to 0.25
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if (Mathf.Abs(frac - 0.25f * sign) < eps) return iVal + 0.25f * sign;
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return value;
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}
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public static float randomAngle()
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{
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return UnityEngine.Random.Range(0.0f, 360.0f);
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}
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public static int getNumDigits(int number)
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{
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return number == 0 ? 1 : Mathf.FloorToInt(Mathf.Log10(Mathf.Abs(number)) + 1);
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}
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public static float safeAcos(float cosine)
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{
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cosine = Mathf.Max(-1.0f, Mathf.Min(1.0f, cosine));
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return Mathf.Acos(cosine);
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}
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// Note: It's simply faster than Mathf.Abs.
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public static float fastAbs(float val)
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{
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return val < 0.0f ? -val : val;
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}
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public static bool solveQuadratic(float a, float b, float c, out float t1, out float t2)
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{
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t1 = t2 = 0.0f;
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float delta = b * b - 4.0f * a * c;
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if (delta < 0.0f) return false;
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float _2TimesA = 2.0f * a;
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if (_2TimesA == 0.0f) return false;
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if (delta == 0.0f)
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{
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t1 = t2 = -b / _2TimesA;
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return true;
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}
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else
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{
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float sqrtDelta = Mathf.Sqrt(delta);
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t1 = (-b + sqrtDelta) / _2TimesA;
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t2 = (-b - sqrtDelta) / _2TimesA;
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if (t1 > t2)
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{
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float tSwap = t1;
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t1 = t2;
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t2 = tSwap;
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}
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return true;
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}
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}
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}
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}
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#endif
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