96 lines
3.2 KiB
C#
96 lines
3.2 KiB
C#
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// Perfect Culling (C) 2021 Patrick König
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//
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using System;
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#if UNITY_EDITOR
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using UnityEditor;
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#endif
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using UnityEngine;
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using UnityEngine.Rendering;
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namespace Koenigz.PerfectCulling
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{
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public class PerfectCullingExcludeVolume : MonoBehaviour, CustomHandle.IResizableByHandle
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{
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static readonly Bounds UniformBounds = new Bounds(Vector3.zero, Vector3.one);
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[SerializeField] public Vector3 volumeSize = Vector3.one;
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[SerializeField] public PerfectCullingBakingBehaviour[] restrictToBehaviours = System.Array.Empty<PerfectCullingBakingBehaviour>();
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public Bounds volumeExcludeBounds
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{
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get => new Bounds(transform.position, volumeSize);
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set
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{
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// TODO: Causes annoying offset, gonna need to solve this in a different way.
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transform.position = value.center;
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volumeSize = new Vector3(
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Mathf.Max(1, (value.size.x)),
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Mathf.Max(1, (value.size.y)),
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Mathf.Max(1, (value.size.z)));
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}
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}
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public bool IsPositionActive(PerfectCullingBakingBehaviour bakingBehaviour, Vector3 pos)
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{
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if (restrictToBehaviours.Length > 0)
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{
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if (System.Array.IndexOf(restrictToBehaviours, bakingBehaviour) < 0)
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{
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return false;
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}
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}
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#if true
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// This should be much faster
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Transform tf = transform;
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Vector3 localPos = Quaternion.Inverse(tf.rotation) * (tf.position - pos);
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Vector3 scale = volumeExcludeBounds.extents;
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localPos.x *= 1F / scale.x;
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localPos.y *= 1F / scale.y;
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localPos.z *= 1F / scale.z;
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return localPos.x <= 1.0f && localPos.x >= -1.0f
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&& localPos.y <= 1.0f && localPos.y >= -1.0f
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&& localPos.z <= 1.0f && localPos.z >= -1.0f;
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#else
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Matrix4x4 matrix4X4 = Matrix4x4.TRS(transform.position, transform.rotation, volumeExcludeBounds.size).inverse;
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return UniformBounds.Contains(matrix4X4.MultiplyPoint3x4(pos));
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#endif
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}
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public Vector3 HandleSized
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{
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get => volumeExcludeBounds.size;
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set => volumeExcludeBounds = new Bounds(transform.position, value);
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}
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#if UNITY_EDITOR
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private void OnDrawGizmosSelected()
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{
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Matrix4x4 trs = Matrix4x4.TRS(transform.position, transform.rotation, Vector3.one);
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Handles.color = new Color(1, 0, 0, 1.0f);
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Handles.zTest = CompareFunction.LessEqual;
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Handles.lighting = false;
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Handles.matrix = trs;
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Handles.DrawWireCube(Vector3.zero, volumeSize);
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// CubeHandleCap doesn't allow to specify non-uniform scale so we need to mess with the matrix
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Handles.matrix = trs * Matrix4x4.Scale(volumeSize);
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Handles.color = new Color(1, 0, 0, PerfectCullingConstants.VolumeInsideAlpha);
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Handles.CubeHandleCap(-1, Vector3.zero, Quaternion.identity, 1.0f, EventType.Repaint);
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}
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#endif
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}
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}
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