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GPU subdiv: fix custom data interpolation for N-gons 

Not all coarse vertices were used to compute the center value (off by
one), and the interpolation for the current would always start at the
base corner for the base face instead of the base corner for the current
patch.
This commit is contained in:
Kévin Dietrich 2022-02-15 17:48:49 +01:00
parent 7083ea36e2
commit 430ced76d5
1 changed files with 2 additions and 2 deletions
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4
source/blender/draw/intern/shaders/common_subdiv_custom_data_interp_comp.glsl
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@ -185,7 +185,7 @@ void main()
}
else {
/* Interpolate the src data for the center. */
uint loop_end = loop_start + number_of_vertices - 1;
uint loop_end = loop_start + number_of_vertices;
Vertex center_value;
clear(center_value);
@ -202,7 +202,7 @@ void main()
uint prev_coarse_corner = (current_coarse_corner + number_of_vertices - 1) %
number_of_vertices;
v0 = read_vertex(loop_start);
v0 = read_vertex(loop_start + current_coarse_corner);
v1 = average(v0, read_vertex(loop_start + next_coarse_corner));
v3 = average(v0, read_vertex(loop_start + prev_coarse_corner));