protected void OnPreprocessModel()
{
// Restrict this to the same folders as the standard asset post-processor.
if (!ProjectAssetPostprocessor.IsIncludedFolder(assetPath))
{
return;
}
if (!assetPath.ToLower().Contains(SpriteAnimImporterPrefs.NameFilter.ToLower()))
{
return;
}
ModelImporter importer = (ModelImporter)assetImporter;
importer.importMaterials = true;
Debug.Log("SpriteAnimImporter: Asset path " + assetPath + " contained sprite animation marker " + SpriteAnimImporterPrefs.NameFilter.ToLower() + ". Beginning import pre-processing.");
}
private void OnPostprocessModel(GameObject root)
{
// Restrict this to the same folders as the standard asset post-processor.
if (!ProjectAssetPostprocessor.IsIncludedFolder(assetPath))
{
return;
}
if (!root.name.ToLower().Contains(SpriteAnimImporterPrefs.NameFilter.ToLower()))
{
return;
}
Debug.Log("SpriteAnimImporter: Game object " + root.name + " contained sprite animation marker " + SpriteAnimImporterPrefs.NameFilter.ToLower() + ". Beginning import post-processing.");
MeshRenderer[] meshRenderers = root.GetComponentsInChildren <MeshRenderer>(true);
AssetDatabase.StartAssetEditing();
// Loop backwards through the list to allow easy deleting of objects.
for (int i = meshRenderers.Length - 1; i >= 0; i--)
{
MeshRenderer meshRenderer = meshRenderers[i];
GameObject targetGameObject = meshRenderer.gameObject;
Material attachedMaterial = meshRenderer.sharedMaterial;
if (attachedMaterial == null)
{
Debug.LogWarning("SpriteAnimImporter: Mesh renderer " + meshRenderer.name + " had no material!");
continue;
}
Texture attachedTexture = attachedMaterial.mainTexture;
if (attachedTexture == null)
{
Debug.LogWarning("SpriteAnimImporter: Material " + attachedMaterial.name + " had no assigned main texture!");
continue;
}
string texturePath = AssetDatabase.GetAssetPath(attachedTexture);
TextureImporter textureImporter = AssetImporter.GetAtPath(texturePath) as TextureImporter;
if (textureImporter == null)
{
Debug.LogError("SpriteAnimImporter: Failed to retrieve texture importer for texture " + attachedTexture.name + ".");
continue;
}
Sprite retrievedSprite = AssetDatabase.LoadAssetAtPath(texturePath, typeof(Sprite)) as Sprite;
// NOTE: This won't work correctly!
// Even though the dialogue window is shown, the import doesn't happen immediately, which means the script will fail to find the sprites further below.
// Conversion of the textures to sprites will still happen, though, so when you run this script a second time, everything will suddenly be fine...
if (retrievedSprite == null && textureImporter.textureType != TextureImporterType.Sprite)
{
if (EditorUtility.DisplayDialog(
"Sprite animation contained a non-sprite texture: " + texturePath,
"Do you want to reimport this texture as a sprite?",
"Yes",
"No"))
{
textureImporter.textureType = TextureImporterType.Sprite;
// Some of these might not be necessary, but in various attempts to solve the problem described above, they were all included.
// They don't seem to do any harm either.
AssetDatabase.ImportAsset(texturePath, ImportAssetOptions.ForceSynchronousImport);
AssetDatabase.Refresh(ImportAssetOptions.ForceSynchronousImport);
AssetDatabase.SaveAssets();
retrievedSprite = AssetDatabase.LoadAssetAtPath(texturePath, typeof(Sprite)) as Sprite;
}
Debug.LogError("SpriteAnimImporter: Failed to retrieve sprite for texture " + attachedTexture.name + ". It may not yet have been set as a sprite. Fix this and reimport the model.");
}
if (retrievedSprite == null)
{
Debug.LogError("SpriteAnimImporter: Failed to retrieve sprite for texture " + attachedTexture.name + ".");
continue;
}
// // Automate texture packing.
// if (string.IsNullOrEmpty(textureImporter.spritePackingTag))
// {
// textureImporter.spritePackingTag = root.name;
// }
// A sprite associated with the material has been retrieved. We can now proceed to replace the mesh renderer + material with a sprite renderer + sprite setup.
// Clear the mesh renderer and mesh filter.
MeshFilter meshFilter = targetGameObject.GetComponent <MeshFilter>();
if (meshFilter != null)
{
if (meshFilter.sharedMesh != null)
{
Object.DestroyImmediate(meshFilter.sharedMesh, true);
}
Object.DestroyImmediate(meshFilter);
}
Object.DestroyImmediate(meshRenderer);
// Create sprite renderer and assign sprite.
SpriteRenderer spriteRenderer = targetGameObject.AddComponent <SpriteRenderer>();
spriteRenderer.sprite = retrievedSprite;
// targetGameObject.transform.localScale = Vector3.one * 4.8f;
// Most characters are modeled with their z-axis align with the world z-axis (facing away from the camera.)
// Sprites, on the other hand, by default face the camera.
// To counteract this, we need to rotate the game object.
targetGameObject.transform.Rotate(new Vector3(0, 180, 0));
}
AssetDatabase.StopAssetEditing();
Debug.Log("SpriteAnimImporter: Game object " + root.name + " finished importing as sprite animation.");
}