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--- gamedev:textureproperties:color_alpha [2019/05/09 08:28] – removed dragonlord
+++ gamedev:textureproperties:color_alpha [2019/05/24 23:43] (current) – ↷ Links adapted because of a move operation dragonlord
@@ Line 1: / Line 1: @@
+{{tag>graphic skin texture color transparency}}
+<WRAP youarehere>
+[[:start|Start Page]] >> [[:gamedev|Game Development with the Drag[en]gine]] >> [[gamedev:skinproperties|Skin Texture Properties]] >> [[gamedev:texturepropertylist|Texture Property Database]] >> **color_alpha**
+</WRAP>
+====== Skin Texture Property: color_alpha ======
+Defines albedo color with transparency.
+|Excepted Data Source|4 component image|
+|Data Range|0 to 1 for all image components|
+|Default Value|(0, 0, 0, 1)|
+|Affected Modules|Graphic|
+|Linked Properties|[[gamedev:textureproperties:color_gamma|color.gamma]], [[gamedev:textureproperties:color_tint|color.tint]]|
+====== Description ======
+The **color_alpha** texture property combines the **[[gamedev:textureproperties:color|color]]** and the **[[gamedev:textureproperties:transparency|transparency]]** texture properties in one texture property. Sometimes it is useful and saves disk space if the alpha channel of an image or color is used directly as the transparency value.
+The red, green and blue components (component 0, 1 and 2) are used exactly the same way as in the **[[gamedev:textureproperties:color|color]]** texture property. The alpha component (component 3) is used exactly as in the **[[gamedev:textureproperties:transparency|transparency]]** texture property. See the appropriate texture properties to learn the details.
+If the **color_alpha** texture property is defined together with the **[[gamedev:textureproperties:color|color]]** and/or the **[[gamedev:textureproperties:transparency|transparency]]** texture property the **color_alpha** texture property is applied first then the other texture properties.
+The color values are typically an 8 bit image with 4 color components with the data of all color components located inside the range from 0 to 1. 0 represents 0% light reflectivity (respectively 0% opaqueness) for a color component while 1 represents a 100% light reflectivity (respectively 100% opaqueness). Values outside this range are physically not plausible.
+The default value for this texture property is opaque pure black (0, 0, 0, 1).
+====== Examples ======
+<WRAP center 100%>
+<WRAP center box 450px>
+{{ :gamedev:textureproperties:color.png |Color property from a simple concrete material}}
+<WRAP centeralign>Color property from a simple concrete material. Only albedo color variations have to be included in this texture property.</WRAP>
+</WRAP>
+</WRAP>

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