Unity Terrane和网格融合

注意：考虑到本指南的篇幅，我想确保您了解此着色器的优缺点。今天我们将讨论着色器的两个版本。第一个允许您混合一个纹理，因此着色器适用于高分辨率纹理，但事实证明您仅限于一个纹理。第二个着色器允许您混合低分辨率或一种颜色的任意数量的Terranes纹理（或经过某些修改的Terranes网格纹理），并在统一地形和地形网格物体上工作。这些着色器没有正常的全功能混合，这在无样式的游戏中很有用，但是有一种方法可以自己实现。

什么是渲染纹理？

客制化

替换着色器

开始烘焙吧

//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");
    }
}

着色器

着色器扩展-正常

着色器扩展-所有颜色

[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;
 
}

结论