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using UnityEngine;
using UnityEditor;
using System.IO;
public class GenerateMetallicGlossMap : EditorWindow
{
private Texture2D metallicMap;
private Texture2D smoothnessMap;
private bool invertSmoothness = false;
[MenuItem("Tools/yum_food/GenerateMetallicGlossMap")]
public static void ShowWindow()
{
GetWindow<GenerateMetallicGlossMap>("Metallic Gloss Map Generator");
}
private void OnGUI()
{
GUILayout.Label("Metallic Gloss Map Generator", EditorStyles.boldLabel);
metallicMap = (Texture2D)EditorGUILayout.ObjectField(
"Metallic Map (R)", metallicMap, typeof(Texture2D), false);
smoothnessMap = (Texture2D)EditorGUILayout.ObjectField(
"Smoothness Map (R)", smoothnessMap, typeof(Texture2D), false);
invertSmoothness = EditorGUILayout.Toggle("Invert Smoothness", invertSmoothness);
if (GUILayout.Button("Generate Metallic Gloss Map") && metallicMap != null && smoothnessMap != null)
{
GenerateMap();
}
}
private void GenerateMap()
{
// Get path of metallic map
string path = AssetDatabase.GetAssetPath(metallicMap);
string directory = Path.GetDirectoryName(path);
string newPath = Path.Combine(directory, metallicMap.name + "_metallicgloss.png");
// Create new texture
int width = metallicMap.width;
int height = metallicMap.height;
Texture2D combinedTexture = new Texture2D(width, height, TextureFormat.RGBA32, false);
// Make the texture readable
TextureImporter metallicImporter = AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(metallicMap)) as TextureImporter;
TextureImporter smoothnessImporter = AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(smoothnessMap)) as TextureImporter;
bool metallicReadable = metallicImporter.isReadable;
bool smoothnessReadable = smoothnessImporter.isReadable;
metallicImporter.isReadable = true;
smoothnessImporter.isReadable = true;
AssetDatabase.ImportAsset(AssetDatabase.GetAssetPath(metallicMap));
AssetDatabase.ImportAsset(AssetDatabase.GetAssetPath(smoothnessMap));
// Get pixels
Color[] metallicPixels = metallicMap.GetPixels();
Color[] smoothnessPixels = smoothnessMap.GetPixels();
Color[] newPixels = new Color[metallicPixels.Length];
// Combine channels (R from metallic, A from smoothness)
for (int i = 0; i < metallicPixels.Length; i++)
{
float smoothness = invertSmoothness ? 1 - smoothnessPixels[i].r : smoothnessPixels[i].r;
newPixels[i] = new Color(
metallicPixels[i].r, // Metallic in R
0, // Empty G
0, // Empty B
smoothness // Smoothness in A (inverted if flag is set)
);
}
// Apply pixels and save
combinedTexture.SetPixels(newPixels);
combinedTexture.Apply();
// Encode and save
byte[] bytes = combinedTexture.EncodeToPNG();
File.WriteAllBytes(newPath, bytes);
// Restore original import settings
metallicImporter.isReadable = metallicReadable;
smoothnessImporter.isReadable = smoothnessReadable;
AssetDatabase.ImportAsset(AssetDatabase.GetAssetPath(metallicMap));
AssetDatabase.ImportAsset(AssetDatabase.GetAssetPath(smoothnessMap));
AssetDatabase.ImportAsset(newPath);
Debug.Log("Generated metallic gloss map at: " + newPath);
}
}
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