106 lines
1.9 KiB
C#
106 lines
1.9 KiB
C#
using System;
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using UnityEngine;
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namespace RoR2;
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[Serializable]
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public struct PackedUnitVector3
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{
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[SerializeField]
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public ushort value;
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private static readonly float[] uvAdjustment;
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private const ushort signMask = 57344;
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private const ushort invSignMask = 8191;
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private const ushort xSignMask = 32768;
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private const ushort ySignMask = 16384;
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private const ushort zSignMask = 8192;
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private const ushort topMask = 8064;
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private const ushort bottomMask = 127;
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static PackedUnitVector3()
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{
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uvAdjustment = new float[8192];
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for (int i = 0; i < uvAdjustment.Length; i++)
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{
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int num = i >> 7;
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int num2 = i & 0x7F;
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if (num + num2 >= 127)
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{
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num = 127 - num;
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num2 = 127 - num2;
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}
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Vector3 vector = new Vector3(num, num2, 126 - num - num2);
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uvAdjustment[i] = 1f / vector.magnitude;
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}
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}
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public PackedUnitVector3(ushort value)
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{
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this.value = value;
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}
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public PackedUnitVector3(Vector3 src)
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{
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value = 0;
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if (src.x < 0f)
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{
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value |= 32768;
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src.x = 0f - src.x;
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}
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if (src.y < 0f)
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{
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value |= 16384;
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src.y = 0f - src.y;
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}
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if (src.z < 0f)
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{
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value |= 8192;
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src.z = 0f - src.z;
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}
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float num = 126f / (src.x + src.y + src.z);
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int num2 = (int)(src.x * num);
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int num3 = (int)(src.y * num);
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if (num2 >= 64)
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{
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num2 = 127 - num2;
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num3 = 127 - num3;
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}
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value |= (ushort)(num2 << 7);
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value |= (ushort)num3;
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}
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public Vector3 Unpack()
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{
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int num = (value & 0x1F80) >> 7;
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int num2 = value & 0x7F;
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if (num + num2 >= 127)
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{
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num = 127 - num;
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num2 = 127 - num2;
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}
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float num3 = uvAdjustment[value & 0x1FFF];
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Vector3 result = new Vector3(num3 * (float)num, num3 * (float)num2, num3 * (float)(126 - num - num2));
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if ((value & 0x8000u) != 0)
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{
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result.x = 0f - result.x;
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}
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if ((value & 0x4000u) != 0)
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{
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result.y = 0f - result.y;
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}
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if ((value & 0x2000u) != 0)
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{
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result.z = 0f - result.z;
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}
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return result;
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}
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}
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