Einheit Terrane und Mesh Blending

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Was ist eine Rendertextur?

Anpassung

Ersatz-Shader

Lass uns anfangen zu backen

//Shader that renders object based on distance to camera
public Shader depthShader;
//The render texture which will store the depth of our terrain
public RenderTexture depthTexture;
//The camera this script is attached to
private Camera cam;

private void UpdateBakingCamera()
    {
        //if the camera hasn't been assigned then assign it
        if (cam == null)
        {
            cam = GetComponent<Camera>();
        }
 
        //the total width of the bounding box of our cameras view
        Shader.SetGlobalFloat("TB_SCALE", GetComponent<Camera>().orthographicSize * 2);
        //find the bottom corner of the texture in world scale by subtracting the size of the camera from its x and z position
        Shader.SetGlobalFloat("TB_OFFSET_X", cam.transform.position.x - cam.orthographicSize);
        Shader.SetGlobalFloat("TB_OFFSET_Z", cam.transform.position.z - cam.orthographicSize);
        //we'll also need the relative y position of the camera, lets get this by subtracting the far clip plane from the camera y position
        Shader.SetGlobalFloat("TB_OFFSET_Y", cam.transform.position.y - cam.farClipPlane);
        //we'll also need the far clip plane itself to know the range of y values in the depth texture
        Shader.SetGlobalFloat("TB_FARCLIP", cam.farClipPlane);
 
        //NOTE: some of the arithmatic here could be moved to the shader but keeping it here makes the shader cleaner so ¯\_(ツ)_/¯
    }

// The context menu tag allows us to run methods from the inspector (https://docs.unity3d.com/ScriptReference/ContextMenu.html)
[ContextMenu("Bake Depth Texture")]
public void BakeTerrainDepth()
{
    //call our update camera method 
    UpdateBakingCamera();
 
    //Make sure the shader and texture are assigned in the inspector
    if (depthShader != null && depthTexture != null)
    {
        //Set the camera replacment shader to the depth shader that we will assign in the inspector 
        cam.SetReplacementShader(depthShader, "RenderType");
        //set the target render texture of the camera to the depth texture 
        cam.targetTexture = depthTexture;
        //set the render texture we just created as a global shader texture variable
        Shader.SetGlobalTexture("TB_DEPTH", depthTexture);
    }
    else
    {
        Debug.Log("You need to assign the depth shader and depth texture in the inspector");
    }
}

Shader

Shader-Erweiterung - Normal

Shader-Erweiterung - Alle Farben

[Header("The following settings are only if using the multi-color terrain shader")]
//Shader that renders the unlit terraom of an object
public Shader unlitTerrainShader;
//The render texture which will store the normals of our terrain
public RenderTexture surfaceTexture;
//An unlit terrain material used to capture the texture of our terrain without any lighting
public Material unlitTerrainMaterial;
//The terrain you want to capture the textures of
public Terrain yourTerrain;
 
[ContextMenu("Bake Surface Texture")]
public void BakeTerrainSurface()
{
    UpdateBakingCamera();
 
    //return if there is no terrain assigned
    if (yourTerrain == null)
    {
        Debug.Log("You need to assign a terrain to capture surface texture");
        return;
    }
 
    StartCoroutine(BakeColors());
}
 
IEnumerator BakeColors()
{
    Material tempTerrainMaterial = yourTerrain.materialTemplate;
 
    yourTerrain.materialTemplate = unlitTerrainMaterial;
 
    yield return 0;
 
    cam.SetReplacementShader(unlitTerrainShader, "RenderType");
    cam.targetTexture = surfaceTexture;
    Shader.SetGlobalTexture("TB_SURFACE", surfaceTexture);
 
    yield return 0;
 
    cam.targetTexture = null;
    yourTerrain.materialTemplate = tempTerrainMaterial;
 
    yield return null;
 
}

Fazit