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100 lines
3.9 KiB
100 lines
3.9 KiB
1 year ago
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//Based on Unity's GlobalFog.
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namespace UnityEngine.AzureSky
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{
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[ImageEffectAllowedInSceneView]
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[ExecuteInEditMode]
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[RequireComponent(typeof(Camera))]
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[AddComponentMenu("Azure[Sky]/Fog Scattering")]
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public class AzureSkyFogScattering : MonoBehaviour
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{
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public Material fogScatteringMaterial;
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private Camera m_camera = null;
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private Transform m_cameraTransform = null;
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private Vector3[] m_frustumCorners = new Vector3[4];
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private Rect m_rect = new Rect(0, 0, 1, 1);
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private Matrix4x4 m_frustumCornersArray;
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/*public LayerMask excludeLayers = 0;
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public CameraClearFlags clearFlags = CameraClearFlags.Nothing;
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private GameObject m_tmpCam;*/
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private void Start()
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{
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m_camera = GetComponent<Camera>();
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m_cameraTransform = m_camera.transform;
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}
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[ImageEffectOpaque] // Apply the fog scattering effect after opaque geometry but before transparent geometry.
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void OnRenderImage(RenderTexture source, RenderTexture destination)
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{
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m_camera.depthTextureMode |= DepthTextureMode.Depth;
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if (fogScatteringMaterial == null)
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{
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Graphics.Blit(source, destination);
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return;
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}
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m_camera.CalculateFrustumCorners(m_rect, m_camera.farClipPlane, m_camera.stereoActiveEye, m_frustumCorners);
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m_frustumCornersArray = Matrix4x4.identity;
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m_frustumCornersArray.SetRow(0, m_cameraTransform.TransformVector(m_frustumCorners[0])); // bottom left
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m_frustumCornersArray.SetRow(2, m_cameraTransform.TransformVector(m_frustumCorners[1])); // top left
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m_frustumCornersArray.SetRow(3, m_cameraTransform.TransformVector(m_frustumCorners[2])); // top right
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m_frustumCornersArray.SetRow(1, m_cameraTransform.TransformVector(m_frustumCorners[3])); // bottom right
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fogScatteringMaterial.SetMatrix("_FrustumCorners", m_frustumCornersArray);
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Graphics.Blit(source, destination, fogScatteringMaterial, 0);
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//Exclude layers.
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/*if (Application.isPlaying)
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{
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//m_camera = null;
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if (excludeLayers.value != 0)
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{
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m_camera = GetTmpCam();
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}
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if (m_camera && excludeLayers.value != 0)
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{
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//cam.targetTexture = destination;
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m_camera.cullingMask = excludeLayers;
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//cam.Render();
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}
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}*/
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}
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//From: https://github.com/UnityCommunity/UnityLibrary/blob/master/Assets/Shaders/ImageEffects/GrayscaleLayers.cs
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/*Camera GetTmpCam()
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{
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if (m_tmpCam == null)
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{
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if (m_camera == null) m_camera = GetComponent<Camera>();
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string name = "Exclude Fog Scattering";
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GameObject go = GameObject.Find(name);
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if (go == null)//Couldn't find, recreate.
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{
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m_tmpCam = new GameObject(name, typeof(Camera));
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}
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else
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{
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m_tmpCam = go;
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}
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}
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m_tmpCam.transform.position = transform.position;
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m_tmpCam.transform.rotation = transform.rotation;
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m_tmpCam.transform.localScale = transform.localScale;
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m_tmpCam.transform.parent = this.transform;
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m_tmpCam.GetComponent<Camera>().CopyFrom(m_camera);
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//tmpCam.GetComponent<Camera>().enabled = false;
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m_tmpCam.GetComponent<Camera>().depthTextureMode = DepthTextureMode.None;
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m_tmpCam.GetComponent<Camera>().clearFlags = clearFlags;
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m_tmpCam.GetComponent<Camera>().depth = m_camera.depth + 1;
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return m_tmpCam.GetComponent<Camera>();
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}*/
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}
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}
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