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* src/sdf/ftbsdf.c (compute_edge_distance): Grammer fix.

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Anuj Verma 2020-07-31 17:47:39 +05:30 committed by anujverma
parent 62b38d2b85
commit 185c88905e
2 changed files with 7 additions and 2 deletions
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[GSoC]ChangeLog
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@ -1,3 +1,7 @@
2020-07-31 Anuj Verma <anujv@iitbhilai.ac.in>
* src/sdf/ftbsdf.c (compute_edge_distance): Grammer fix.
2020-07-31 Anuj Verma <anujv@iitbhilai.ac.in>
[sdf -> bsdf] Add explanation of the approximation.

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src/sdf/ftbsdf.c
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@ -187,11 +187,12 @@
/* distance of the pixel to edge pretty accurately. A real */
/* simple approximation is ( 0.5f - alpha ), assuming that */
/* the outline is parallel to the x or y axis. But in this */
/* algorithm that is pretty accurate the edge distance. */
/* algorithm we use a different approximation which is qui- */
/* te accurate even for non axis aligned edges. */
/* */
/* * The only remaining piece of information that we cannot */
/* approximate directly from the alpha is the direction of */
/* the edge. That is where we use the Sobel's operator to */
/* the edge. This is where we use the Sobel's operator to */
/* compute the gradient of the pixel. The gradient give us */
/* a pretty good approximation of the edge direction. */
/* We use a 3x3 kernel filter to compute the gradient. */