7645ce91ed
# Objective Fix https://github.com/bevyengine/bevy/issues/19617 # Solution Add newlines before all impl blocks. I suspect that at least some of these will be objectionable! If there's a desired Bevy style for this then I'll update the PR. If not then we can just close it - it's the work of a single find and replace.
48 lines
1.8 KiB
Rust
48 lines
1.8 KiB
Rust
use bevy_reflect::{std_traits::ReflectDefault, Reflect};
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/// The [parallax mapping] method to use to compute depth based on the
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/// material's [`depth_map`].
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///
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/// Parallax Mapping uses a depth map texture to give the illusion of depth
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/// variation on a mesh surface that is geometrically flat.
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///
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/// See the `parallax_mapping.wgsl` shader code for implementation details
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/// and explanation of the methods used.
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///
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/// [`depth_map`]: crate::StandardMaterial::depth_map
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/// [parallax mapping]: https://en.wikipedia.org/wiki/Parallax_mapping
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#[derive(Debug, Copy, Clone, PartialEq, Eq, Default, Reflect)]
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#[reflect(Default, Clone, PartialEq)]
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pub enum ParallaxMappingMethod {
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/// A simple linear interpolation, using a single texture sample.
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///
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/// This method is named "Parallax Occlusion Mapping".
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///
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/// Unlike [`ParallaxMappingMethod::Relief`], only requires a single lookup,
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/// but may skip small details and result in writhing material artifacts.
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#[default]
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Occlusion,
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/// Discovers the best depth value based on binary search.
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///
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/// Each iteration incurs a texture sample.
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/// The result has fewer visual artifacts than [`ParallaxMappingMethod::Occlusion`].
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///
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/// This method is named "Relief Mapping".
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Relief {
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/// How many additional steps to use at most to find the depth value.
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max_steps: u32,
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},
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}
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impl ParallaxMappingMethod {
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/// [`ParallaxMappingMethod::Relief`] with a 5 steps, a reasonable default.
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pub const DEFAULT_RELIEF_MAPPING: Self = ParallaxMappingMethod::Relief { max_steps: 5 };
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pub(crate) fn max_steps(&self) -> u32 {
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match self {
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ParallaxMappingMethod::Occlusion => 0,
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ParallaxMappingMethod::Relief { max_steps } => *max_steps,
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}
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}
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}
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