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Fix filtering artifact for non-color images #1886

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merged 1 commit into from
Apr 18, 2023
Merged

Fix filtering artifact for non-color images #1886

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21 changes: 19 additions & 2 deletions crates/re_viewer/src/ui/view_spatial/scene/scene_part/images.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -50,14 +50,31 @@ fn push_tensor_texture(
annotations,
) {
Ok(colormapped_texture) => {
// TODO(emilk): let users pick texture filtering.
// Always use nearest for magnification: let users see crisp individual pixels when they zoom
let texture_filter_magnification = re_renderer::renderer::TextureFilterMag::Nearest;

// For minimization: we want a smooth linear (ideally mipmapped) filter for color images.
// Note that this filtering is done BEFORE applying the color map!
// For labeled/annotated/class_Id images we want nearest, because interpolating classes makes no sense.
// Interpolating depth images _can_ make sense, but can also produce weird artifacts when there are big jumps (0.1m -> 100m),
// so it's usually safer to turn off.
// The best heuristic is this: if there is a color map being applied, use nearest.
// TODO(emilk): apply filtering _after_ the color map?
let texture_filter_minification = if colormapped_texture.color_mapper.is_some() {
re_renderer::renderer::TextureFilterMin::Nearest
} else {
re_renderer::renderer::TextureFilterMin::Linear
};

let textured_rect = re_renderer::renderer::TexturedRect {
top_left_corner_position: world_from_obj.transform_point3(glam::Vec3::ZERO),
extent_u: world_from_obj.transform_vector3(glam::Vec3::X * width as f32),
extent_v: world_from_obj.transform_vector3(glam::Vec3::Y * height as f32),
colormapped_texture,
options: RectangleOptions {
texture_filter_magnification: re_renderer::renderer::TextureFilterMag::Nearest,
texture_filter_minification: re_renderer::renderer::TextureFilterMin::Linear,
texture_filter_magnification,
texture_filter_minification,
multiplicative_tint,
depth_offset: -1, // Push to background. Mostly important for mouse picking order!
outline_mask,
Expand Down