Commit: d9d81cb1ffa964439630963cd4cd504137c91d20
Author: Jeroen Bakker
Date: Tue May 10 15:52:28 2022 +0200
Branches: master
https://developer.blender.org/rBd9d81cb1ffa964439630963cd4cd504137c91d20
3d texture painting: Use center uv pixel as anchor.
Previously the bottom left of a pixel was used during pixel extraction what
resulted in
that the pixels were moved a bit to the bottom left. By using the center uv
pixel the
extracted pixels are more balanced and would improve future features like seam
bleeding.
===================================================================
M source/blender/blenkernel/intern/pbvh_pixels.cc
===================================================================
diff --git a/source/blender/blenkernel/intern/pbvh_pixels.cc
b/source/blender/blenkernel/intern/pbvh_pixels.cc
index 5623cac44ac..9ea7f991677 100644
--- a/source/blender/blenkernel/intern/pbvh_pixels.cc
+++ b/source/blender/blenkernel/intern/pbvh_pixels.cc
@@ -26,7 +26,7 @@ namespace blender::bke::pbvh::pixels {
* During debugging this check could be enabled.
* It will write to each image pixel that is covered by the PBVH.
*/
-constexpr bool USE_WATERTIGHT_CHECK = false;
+constexpr bool USE_WATERTIGHT_CHECK = true;
/**
* Calculate the delta of two neighbor UV coordinates in the given image
buffer.
@@ -71,7 +71,7 @@ static void extract_barycentric_pixels(UDIMTilePixels
&tile_data,
int x;
for (x = minx; x < maxx; x++) {
- float2 uv(float(x) / image_buffer->x, float(y) / image_buffer->y);
+ float2 uv((float(x) + 0.5f) / image_buffer->x, (float(y) + 0.5f) /
image_buffer->y);
float3 barycentric_weights;
barycentric_weights_v2(uvs[0], uvs[1], uvs[2], uv, barycentric_weights);
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