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custom_ui_material border fix #17282

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merged 2 commits into from
Jan 11, 2025
Merged

custom_ui_material border fix #17282

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6ea19ce
Order of the border edges in `UiVertexOutput` is left, right, top, bo…
ickshonpe Jan 10, 2025
a3c0d05
Added comments to the `custom_ui_material` shader.
ickshonpe Jan 10, 2025
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12 changes: 10 additions & 2 deletions assets/shaders/custom_ui_material.wgsl
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Original file line number Diff line number Diff line change
Expand Up @@ -10,16 +10,24 @@

@fragment
fn fragment(in: UiVertexOutput) -> @location(0) vec4<f32> {
// normalized position relative to the center of the UI node
let r = in.uv - 0.5;

// normalized size of the border closest to the current position
let b = vec2(
select(in.border_widths.x, in.border_widths.y, r.x < 0.),
select(in.border_widths.z, in.border_widths.w, r.y < 0.)
select(in.border_widths.x, in.border_widths.y, 0. < r.x),
select(in.border_widths.z, in.border_widths.w, 0. < r.y)
);

// if the distance to the edge from the current position on any axis
// is less than the border width on that axis then the position is within
// the border and we return the border color
if any(0.5 - b < abs(r)) {
return border_color;
}

// sample the texture at this position if it's to the left of the slider value
// otherwise return a fully transparent color
if in.uv.x < slider {
let output_color = textureSample(material_color_texture, material_color_sampler, in.uv) * color;
return output_color;
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