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dFdx, dFdy - OpenGL 4 Reference Pages - Khronos Group
https://registry.khronos.org/OpenGL-Refpages/gl4/html/dFdx.xhtml
WebDescription. Available only in the fragment shader, these functions return the partial derivative of expression p with respect to the window $x$ coordinate (for dFdx ...
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understanding the basics of dFdX and dFdY - Stack Overflow
https://stackoverflow.com/questions/28246413/understanding-the-basics-of-dfdx-and-dfdy
WebJan 31, 2015 · 1 Answer. Sorted by: 3. Lets check the man page: genType dFdx( genType p); genType dFdy( genType p); Available only in the fragment shader, these functions return the partial derivative of expression p with respect to the window x coordinate (for dFdx*) and y coordinate (for dFdy*).
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An introduction to shader derivative functions | A Clockwork Berry
http://www.aclockworkberry.com/shader-derivative-functions/
WebJan 9, 2017 · Derivatives are calculated by taking differences between the pixel values in a block; dFdx subtracts the values of the pixels on the left side of the block from the values on the right side, and dFdy subtracts the values of the bottom pixels from the top ones.
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glsl - Explanation of dFdx - Stack Overflow
https://stackoverflow.com/questions/16365385/explanation-of-dfdx
WebMay 3, 2013 · The derivative is the rate of change. The partial derivative of a function with two parameters is when you differentiate the function while keeping one of the parameters constant. dFdx() and dFdy() find the rate that a value changes between the current fragment and a neighboring fragment.
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dFdx - OpenGL ES 3.1 Reference Pages - Khronos Group
https://registry.khronos.org/OpenGL-Refpages/es3.1/html/dFdx.xhtml
WebAvailable only in the fragment shader, dFdx and dFdy return the partial derivative of expression p in x and y, respectively. Deviatives are calculated using local differencing. Expressions that imply higher order derivatives such as dFdx(dFdx(n)) have undefined results, as do mixed-order derivatives such as dFdx(dFdy(n)).
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dFdx, dFdy - OpenGL Reference
https://openglreference.com/w/DFdx
WebMay 11, 2020 · dFdx, dFdy - OpenGL Reference. Return the partial derivative of an argument with respect to x or y. Declaration. Parameters. Description. Available only in the fragment shader, these functions return the partial derivative of expression p with respect to the window [math]x [/math] coordinate (for dFdx* ) and [math]y [/math] coordinate (for …
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Difference between dFdxFine and dFdxCoarse - Stack Overflow
https://stackoverflow.com/questions/39579150/difference-between-dfdxfine-and-dfdxcoarse
WebSep 19, 2016 · 1 Answer. Sorted by: 12. From the GLSL spec: It is typical to consider a 2x2 square of fragments or samples, and compute independent dFdxFine per row and independent dFdyFine per column, while computing only a single dFdxCoarse and a single dFdyCoarse for the entire 2x2 square.
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dFdx - GLSL 4 - docs.gl
https://docs.gl/sl4/dFdx
WebDescription. Available only in the fragment shader, these functions return the partial derivative of expression p with respect to the window $x$ coordinate (for dFdx*) and $y$ coordinate (for dFdy* ). dFdxFine and dFdyFine calculate derivatives using local differencing based on on the value of p for the current fragment and its immediate ...
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How are dFdx and dFdy functions implemented - Khronos Forums
https://community.khronos.org/t/how-are-dfdx-and-dfdy-functions-implemented/66388
WebDec 14, 2011 · I know from the specs that dFdx and dFdy return the derivatives in screen space for a fragment shader. I have a simple test case I have implemented using GLSL and for comparison I need to do the exact case on CPU. I want to know how to do my own dFdx/dFdy functions on CPU.
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A look into how dfdx compiles & uses cuda kernels | dfdx
https://coreylowman.github.io/2023/04/07/cudarc-stack.html
WebApr 7, 2023 · A look into how dfdx compiles & uses cuda kernels | dfdx. Intro. Join the dfdx discord to stay in the loop! GPU Acceleration with CUDA was recently added into dfdx. In this post I’ll dive into: Each step of the CUDA pipeline, from compiling cuda kernels to how launching them works. How generics are handled across FFI.
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