64 lines
1.8 KiB
C#
64 lines
1.8 KiB
C#
using UnityEngine;
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using AwesomeTechnologies.MeshTerrains;
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using Unity.Mathematics;
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namespace AwesomeTechnologies.Utility.BVHTree
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{
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[System.Serializable]
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// ReSharper disable once InconsistentNaming
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public class BVHBBox
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{
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public Vector3 Center = Vector3.zero;
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public Vector3 Min = Vector3.one * float.MaxValue;
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public Vector3 Max = Vector3.one * -float.MaxValue;
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public static bool IntersectRay(BVHRay r, float3 min, float3 max, out float hitDist)
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{
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float tXmin, tXmax, tYmin, tYmax, tZmin, tZmax;
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float xA = 1f / r.Direction.x, yA = 1f / r.Direction.y, zA = 1f / r.Direction.z;
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float xE = r.Origin.x, yE = r.Origin.y, zE = r.Origin.z;
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// calculate t interval in x-axis
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if (xA >= 0)
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{
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tXmin = (min.x - xE) * xA;
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tXmax = (max.x - xE) * xA;
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}
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else
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{
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tXmin = (max.x - xE) * xA;
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tXmax = (min.x - xE) * xA;
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}
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// calculate t interval in y-axis
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if (yA >= 0)
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{
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tYmin = (min.y - yE) * yA;
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tYmax = (max.y - yE) * yA;
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}
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else
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{
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tYmin = (max.y - yE) * yA;
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tYmax = (min.y - yE) * yA;
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}
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// calculate t interval in z-axis
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if (zA >= 0)
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{
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tZmin = (min.z - zE) * zA;
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tZmax = (max.z - zE) * zA;
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}
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else
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{
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tZmin = (max.z - zE) * zA;
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tZmax = (min.z - zE) * zA;
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}
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var tMin = math.max(tXmin, math.max(tYmin, tZmin));
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var tMax = math.min(tXmax, math.min(tYmax, tZmax));
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hitDist = tMin;
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return (tMin <= tMax);
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}
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}
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} |