104 lines
2.7 KiB
C#
104 lines
2.7 KiB
C#
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using System;
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using System.Collections.Generic;
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using UnityEngine;
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[CreateAssetMenu(fileName = "GradientTexture", menuName = "Gradient Texture", order = 310)]
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public class GradientTexture : ScriptableObject
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{
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[Delayed]
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public int width = 64;
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public List<Gradient> gradients = new List<Gradient>();
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private Texture2D _texture;
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private void OnEnable()
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{
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if(_texture == null && gradients.Count > 0)
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Generate();
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}
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[ContextMenu("Generate")]
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private void Generate()
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{
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// create texture that is width x gradients.Count
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// for each gradient, draw a line from left to right with the gradient
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// save to disk
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if(_texture != null)
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DestroyImmediate(_texture);
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_texture = new Texture2D(width, gradients.Count)
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{
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name = name
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};
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for (int i = 0; i < gradients.Count; i++)
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{
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var gradient = gradients[i];
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for (int x = 0; x < width; x++)
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{
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var color = gradient.Evaluate((float)x / width);
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_texture.SetPixel(x, i, color);
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}
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}
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_texture.Apply();
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#if UNITY_EDITOR
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// delayed call to save the icon
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UnityEditor.EditorApplication.delayCall += SaveIcon;
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#endif
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}
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private void OnValidate()
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{
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if(gradients.Count > 0)
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Generate();
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}
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[ContextMenu("Save")]
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private void SaveToDisk()
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{
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#if UNITY_EDITOR
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// save to disk the texture using the AssetDatabase API
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var path = UnityEditor.AssetDatabase.GetAssetPath(this);
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path = path.Replace(".asset", ".png");
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var bytes = _texture.EncodeToPNG();
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System.IO.File.WriteAllBytes(path, bytes);
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UnityEditor.AssetDatabase.SaveAssets();
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UnityEditor.AssetDatabase.Refresh();
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#endif
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}
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#if UNITY_EDITOR
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private void SaveIcon()
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{
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// use _texture as the icon for this object
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var path = UnityEditor.AssetDatabase.GetAssetPath(this);
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// add as sub asset or replace existing
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var icon = UnityEditor.AssetDatabase.LoadAssetAtPath<Texture2D>(path);
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if (icon == null)
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{
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if(_texture != null)
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{
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UnityEditor.AssetDatabase.AddObjectToAsset(_texture, this);
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}
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}
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else
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{
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if(_texture != null)
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{
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UnityEditor.EditorUtility.CopySerialized(_texture, icon);
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}
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}
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UnityEditor.AssetDatabase.SaveAssets();
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UnityEditor.AssetDatabase.Refresh();
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}
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#endif
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}
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