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GPU/Procedural Texture Generation: Difference between revisions

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* Frequency
* Frequency
* Phase
* Phase
These parameters are configured starting [[GPU/Internal_Registers#GPUREG_TEXUNIT3_PROCTEX1|here]].


== Repeat Module ==
== Repeat Module ==
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== Base Shape ==
== Base Shape ==


The U’’ and V’’ coordinates are used to generate a scalar value in the range [0;1] from the wrapped coordinates using one of six functions:
The U’’ and V’’ coordinates are used to generate a scalar value in the range [0;1] from the wrapped coordinates using one of six functions documented [[GPU/Internal_Registers#GPUREG_TEXUNIT3_PROCTEX0|here]].
* ADDSQRT2: sqrt(U’’*U’’+V’’*V’’) (?)
* U’’: U’’ (discards V’’)
* V’’: V’’ (discards U’’)
* MIN: min(U’’,V’’)
* MAX: max(U’’,V’’)
* ADD: U’’+V’’


The output of this function is named "g".
The output of this function is named "g".
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* a triangle function
* a triangle function


The final texel color is determined by using the value of F(g) as an index into a configurable lookup table (which is presumed to span 3 kilobytes of data).
The final texel color is determined by using the value of F(g) as an index into a configurable [[GPU/Internal_Registers#GPUREG_PROCTEX_LUT|lookup table]].
Retrieved from "https://www.3dbrew.org/wiki/GPU/Procedural_Texture_Generation"