Differences

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--- 0.8.3:volumerendering [2022/04/08 09:51] – [NRRD File] admin
+++ 0.8.3:volumerendering [2022/04/08 10:06] (current) – [Gamut Mapping] admin
@@ Line 175: / Line 175: @@
 You can of course fill the 3D data array also manually.
-In the following a simple code snippet showing how to implement such a procedure.
+Pushing data to the 3D-texture by UpdateBuffer() expects to fill data correctly. Otherwise exception may occur.
+You have to take care of the 3D-texture size by the "Sizes" property of the component and the configured "DataType".
+In the following a simple code snippet showing a procedure to fill a 512 x 512 x 512 with 4-Byte float values.
 <file pascal>
@@ Line 333: / Line 337: @@
   GorillaViewport1.Invalidate();
 </file>
+===== Gamut Mapping =====
+Gamut is a colored texture to define how 3D values will be colored.
+Since 0.8.3.2265 this feature is available.
+Here an example of a simple gradient gamut texture:
+{{:0.8.3:gamut.jpg?nolink|}}
+TGorillaVolumetricMesh allows to configure the coloring method by some properties:
+^Property^Description^
+|Gamut|Texture used for mapping the 3D value during Raytracing|
+|GamutMode|Defines when and how the value-color mapping happens. Here different modes are available: GamutNone, GamutByValue, GamutByValueMultiply, GamutBySum, GamutBySumMultiply|
+|GamutFactor|A factor applied to the absolute 3D value before mapping onto the gamut texture (default value is 1.0)|
+=== Modes ===
+The available gamut modes allow to control the output of color mapping.
+^Mode^Description^
+|GamutNone|Gamut mapping is disabled|
+|GamutByValue|Gamut mapping will be applied to each 3D value on the casted ray.|
+|GamutByValueMultiply|Gamut mapping will be applied to each 3D value on the casted ray and afterwards multiplied with the previously computed color value.|
+|GamutBySum|Gamut mapping will be applied to the final casted ray value.|
+|GamutBySumMultiply|Gamut mapping will be applied to the final casted ray value and afterwards multiplied with the previously computed color value.|
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