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| [[Category:GPU]] | | [[Category:GPU]] |
| + | The 3DS GPU supports procedural generation of texture data using [[GPU/Internal_Registers#GPUREG_TEXUNIT3_PROCTEX0|texture unit 3]]. Little is known about this feature, albeit a few public hints have been dropped. The contents of this page are solely based on reports on a [http://www.4gamer.net/games/017/G001762/20120822007/ presentation] given by DMP. |
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− | The 3DS GPU supports procedural generation of texture data using [[GPU_Textures|texture unit 3]]. Little is known about this feature, albeit a few public hints have been dropped. The contents of this page are solely based on reports on a [http://www.4gamer.net/games/017/G001762/20120822007/ presentation] given by DMP. | + | The related GPU registers can be found starting [[GPU/Internal_Registers#GPUREG_TEXUNIT3_PROCTEX0|here]]. |
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| == Overview == | | == Overview == |
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| * Frequency | | * Frequency |
| * Phase | | * Phase |
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| + | These parameters are configured starting [[GPU/Internal_Registers#GPUREG_TEXUNIT3_PROCTEX1|here]]. |
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| == Repeat Module == | | == Repeat Module == |
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| == Base Shape == | | == Base Shape == |
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− | 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’’) (?)
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− | * U’’: U’’ (discards V’’)
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− | * V’’: V’’ (discards U’’)
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− | * MIN: min(U’’,V’’)
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− | * MAX: min(U’’,V’’)
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− | * ADD: U’’+V’’
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| 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 |
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− | 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]]. |