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Code Issues Wiki Activity

Fix Rotxel with Smear producing wrong alpha values for pixels outside the selection

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This commit is contained in:
Emmanouil Papadeas 2022-07-28 12:18:49 +03:00
parent 559da5414b
commit 1350720a8f
1 changed files with 3 additions and 1 deletions
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4
src/Shaders/Rotation/SmearRotxel.shader
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@ -119,9 +119,11 @@ void fragment() {
vec4 rotated_selection = rotate(selection_tex, UV, TEXTURE_PIXEL_SIZE);
vec4 rotated = rotate(TEXTURE, UV, TEXTURE_PIXEL_SIZE);
rotated = mix(vec4(0.0), rotated, rotated_selection.a);
rotated.a *= rotated_selection.a; // Combine with selection mask
float mask = mix(selection.a, 1.0, 1.0 - ceil(original.a)); // Combine selection mask with area outside original
// Combine original and rotated image only when intersecting, otherwise just pure rotated image.
COLOR.rgb = mix(mix(original.rgb, rotated.rgb, rotated.a), rotated.rgb, selection.a);
COLOR.rgb = mix(mix(original.rgb, rotated.rgb, rotated.a), rotated.rgb, mask);
COLOR.a = mix(original.a, 0.0, selection.a); // Remove alpha on the selected area
COLOR.a = mix(COLOR.a, 1.0, rotated.a); // Combine alpha of original image and rotated
}