How to apply a shader effect on one sprite?

[WinMain]

I know how to apply the shader on a material,but I just want to apply a effect on one sprite in atlas.It's there some way to do this?

[dilshod]

Here is my version of how it could be done. i'm going to use this in my current project.

UIShaderSprite.cs:

1. using UnityEngine;
2. using System.Collections;
3. using System.Collections.Generic;
4.  
5. public class UIShaderSprite : UISprite {
6.         Material mMaterial;
7.         [HideInInspector][SerializeField] Shader mShader;
8.  
9.         // cache materials
10.         static Dictionary<int, Dictionary<int, Material>> atlasMaterials = new Dictionary<int, Dictionary<int, Material>>();
11.  
12.         public override Material material {
13.                 get {
14.                         if (mShader != null) {
15.                                 if (mMaterial == null || mChanged) {
16.                                         Dictionary<int, Material> shaderMaterials;
17.                                         if (!atlasMaterials.TryGetValue(atlas.GetInstanceID(), out shaderMaterials))
18.                                                 atlasMaterials[atlas.GetInstanceID()] = shaderMaterials = new Dictionary<int, Material>();
19.  
20.                                         if (!shaderMaterials.TryGetValue(mShader.GetInstanceID(), out mMaterial) || mMaterial == null)
21.                                                 shaderMaterials[mShader.GetInstanceID()] = mMaterial = new Material(base.material) {shader = mShader};
22.                                 }
23.                                 return mMaterial;
24.                         }
25.                         return base.material;
26.                 }
27.         }
28. }
29.  

Editor/UIShaderSpriteInspector.cs:

1. using UnityEngine;
2. using UnityEditor;
3. using System.Collections;
4.  
5. [CanEditMultipleObjects]
6. [CustomEditor(typeof(UIShaderSprite), true)]
7. public class UIShaderSpriteInspector : UISpriteInspector {
8.  
9.         protected override bool ShouldDrawProperties() {
10.                 NGUIEditorTools.DrawProperty("Shader", serializedObject, "mShader", GUILayout.MinWidth(20f));
11.                 return base.ShouldDrawProperties();
12.         }
13. }
14.  

[WinMain]

Here is my version of how it could be done. i'm going to use this in my current project.

UIShaderSprite.cs:

1. using UnityEngine;
2. using System.Collections;
3. using System.Collections.Generic;
4.  
5. public class UIShaderSprite : UISprite {
6.         Material mMaterial;
7.         [HideInInspector][SerializeField] Shader mShader;
8.  
9.         // cache materials
10.         static Dictionary<int, Dictionary<int, Material>> atlasMaterials = new Dictionary<int, Dictionary<int, Material>>();
11.  
12.         public override Material material {
13.                 get {
14.                         if (mShader != null) {
15.                                 if (mMaterial == null || mChanged) {
16.                                         Dictionary<int, Material> shaderMaterials;
17.                                         if (!atlasMaterials.TryGetValue(atlas.GetInstanceID(), out shaderMaterials))
18.                                                 atlasMaterials[atlas.GetInstanceID()] = shaderMaterials = new Dictionary<int, Material>();
19.  
20.                                         if (!shaderMaterials.TryGetValue(mShader.GetInstanceID(), out mMaterial) || mMaterial == null)
21.                                                 shaderMaterials[mShader.GetInstanceID()] = mMaterial = new Material(base.material) {shader = mShader};
22.                                 }
23.                                 return mMaterial;
24.                         }
25.                         return base.material;
26.                 }
27.         }
28. }
29.  

Editor/UIShaderSpriteInspector.cs:

1. using UnityEngine;
2. using UnityEditor;
3. using System.Collections;
4.  
5. [CanEditMultipleObjects]
6. [CustomEditor(typeof(UIShaderSprite), true)]
7. public class UIShaderSpriteInspector : UISpriteInspector {
8.  
9.         protected override bool ShouldDrawProperties() {
10.                 NGUIEditorTools.DrawProperty("Shader", serializedObject, "mShader", GUILayout.MinWidth(20f));
11.                 return base.ShouldDrawProperties();
12.         }
13. }
14.  

Thank you for your idea.But I have one question is,whether this way will make the drawcall rise?Becase if there are too many sprites in atlas,there will be too many materials.

[dilshod]

Nope, i'm not creating new material for each sprite, i'm creating new material for each shader and atlas, that's why there is a cache for materials.
If you put hundreds of different sprites with same shader and same atlas in one depth, they will add only one (or two) draw call.

[WinMain]

thanks for your solution dilshod.

[kimsama]

See UIShaderSprite for the working copy of this thread.

You can find it on the following github repository:

https://github.com/kimsama/Unity-NGUIExtension

As my experiments, it needs to call panel.RebuildAllDrawCalls() to correctly apply a new shader which is differenct to what NGUI applies in UIDrawCall.UpdateMaterial() call.

[WinMain]

See UIShaderSprite for the working copy of this thread.

You can find it on the following github repository:

https://github.com/kimsama/Unity-NGUIExtension

As my experiments, it needs to call panel.RebuildAllDrawCalls() to correctly apply a new shader which is differenct to what NGUI applies in UIDrawCall.UpdateMaterial() call.

Awesome,Thank you so much.