37 lines
1.3 KiB
C#
37 lines
1.3 KiB
C#
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using UnityEngine;
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namespace StixGames.GrassShader
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{
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public static class NatureGeometryUtility
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{
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/// <summary>
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/// Calculates the frustum planes, offsets them by <see cref="offset"/>, and sets the far clip plane to <see cref="farClip"/>
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/// </summary>
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/// <param name="current"></param>
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/// <param name="farClip"></param>
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/// <param name="offset"></param>
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/// <returns></returns>
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public static Plane[] CalculateFrustumPlanes(Camera current, float farClip, float offset)
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{
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var prevFarClipPlane = current.farClipPlane;
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current.farClipPlane = farClip;
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var planes = GeometryUtility.CalculateFrustumPlanes(current);
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OffsetFrustumPlanes(planes, offset);
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current.farClipPlane = prevFarClipPlane;
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return planes;
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}
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/// <summary>
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/// Offsets the frustum planes, to make the area inside smaller or larger by a constant distance in all directions
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/// </summary>
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/// <param name="planes"></param>
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/// <param name="offset"></param>
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public static void OffsetFrustumPlanes(Plane[] planes, float offset)
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{
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for (int i = 0; i < planes.Length; i++)
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{
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planes[i].distance += offset;
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}
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}
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}
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}
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