62 lines
3.7 KiB
C#
62 lines
3.7 KiB
C#
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using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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using System;
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namespace DigitalOpus.MB.Core
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{
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/// <summary>
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/// A TextureBlender will attempt to blend non-texture properties with textures so that the result material looks the same as source material.
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/// </summary>
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public interface TextureBlender
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{
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/// <summary>
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/// The shader name that must be matched on the result material in order for this TextureBlender to be used. This should return something like "Legacy/Bumped Difuse"
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/// </summary>
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bool DoesShaderNameMatch(string shaderName);
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/// <summary>
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/// This is called to prepare the TextureBlender before any calls to OnBlendTexturePixel
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/// Use this to grab the non-texture property values from the material that will be used to alter the Pixel color in the texture.
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/// Note that the sourceMat may not use a shader matching ShaderName. It may not have expected properties. Check that properties exist
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/// before grabing them.
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/// </summary>
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void OnBeforeTintTexture(Material sourceMat, string shaderTexturePropertyName);
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/// <summary>
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/// Called once for each pixel in the texture to alter the pixel color. For efficiency don't check shaderPropertyName every call. Instead use OnBeforeTintTexture
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/// to prepare this textrure blender for a batch of OnBlendTexturePixel calls.
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/// </summary>
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Color OnBlendTexturePixel(string shaderPropertyName, Color pixelColor);
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/// <summary>
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/// Material a & b may have the same set of textures but different non-texture properties (colorTint etc...)
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/// If so then they need to be put into separate rectangels in the atlas. This method should check the non-texture properties
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/// and return false if they are different. Note that material a and b may use a different shader than GetShaderName so your code
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/// should handle the case where properties do not exist.
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/// </summary>
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bool NonTexturePropertiesAreEqual(Material a, Material b);
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/// <summary>
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/// Sets the non texture properties on the result materail after textures have been baked. If for example _Color has been blended with
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/// the _Albedo textures then the _Color property on the result material should probably be set to white.
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/// </summary>
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void SetNonTexturePropertyValuesOnResultMaterial(Material resultMaterial);
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/// <summary>
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/// Some textures may not be assigned for a material. This method should return a color that will used to create a small solid color texture
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/// to be used in these cases. Note that this small solid color texture will later be blended using OnBlendTexturePixel. If the texturePropertyname is _mainTex
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/// then the the returned color should probably be white so it looks correct when OnBlendTexturePixel blends the _Color.
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///
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/// This is also used to determine if an atlas needs to be generated for a texture property. If all the source materials are missing the texture for
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/// texPropertyName property (eg. _MainTex), but some of the source materials return different value for:
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/// OnBlendTexturePixel(texturePropertyName, GetColorIfNoTexture(sourceMat, texturePropertyName))
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/// Then an atlas will be generated with the different colors.
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///
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/// This method can also be used to collect the value of non texture properties and cache them for each source material. This information can be useful
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/// for setting values on the result material.
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/// </summary>
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Color GetColorIfNoTexture(Material m, ShaderTextureProperty texPropertyName);
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}
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}
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