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https://github.com/bevyengine/bevy
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4f20faaa43
# Objective - Implements a more efficient, GPU-driven (https://github.com/bevyengine/bevy/issues/1342) rendering pipeline based on meshlets. - Meshes are split into small clusters of triangles called meshlets, each of which acts as a mini index buffer into the larger mesh data. Meshlets can be compressed, streamed, culled, and batched much more efficiently than monolithic meshes.   # Misc * Future work: https://github.com/bevyengine/bevy/issues/11518 * Nanite reference: https://advances.realtimerendering.com/s2021/Karis_Nanite_SIGGRAPH_Advances_2021_final.pdf Two pass occlusion culling explained very well: https://medium.com/@mil_kru/two-pass-occlusion-culling-4100edcad501 --------- Co-authored-by: Ricky Taylor <rickytaylor26@gmail.com> Co-authored-by: vero <email@atlasdostal.com> Co-authored-by: François <mockersf@gmail.com> Co-authored-by: atlas dostal <rodol@rivalrebels.com>
89 lines
2.3 KiB
WebGPU Shading Language
89 lines
2.3 KiB
WebGPU Shading Language
#import bevy_pbr::{
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pbr_prepass_functions,
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pbr_bindings::material,
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pbr_types,
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pbr_functions,
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prepass_io,
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mesh_view_bindings::view,
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}
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#ifdef MESHLET_MESH_MATERIAL_PASS
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#import bevy_pbr::meshlet_visibility_buffer_resolve::resolve_vertex_output
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#endif
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#ifdef PREPASS_FRAGMENT
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@fragment
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fn fragment(
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#ifdef MESHLET_MESH_MATERIAL_PASS
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@builtin(position) frag_coord: vec4<f32>,
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#else
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in: prepass_io::VertexOutput,
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@builtin(front_facing) is_front: bool,
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#endif
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) -> prepass_io::FragmentOutput {
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#ifdef MESHLET_MESH_MATERIAL_PASS
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let in = resolve_vertex_output(frag_coord);
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let is_front = true;
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#else
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pbr_prepass_functions::prepass_alpha_discard(in);
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#endif
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var out: prepass_io::FragmentOutput;
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#ifdef DEPTH_CLAMP_ORTHO
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out.frag_depth = in.clip_position_unclamped.z;
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#endif // DEPTH_CLAMP_ORTHO
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#ifdef NORMAL_PREPASS
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// NOTE: Unlit bit not set means == 0 is true, so the true case is if lit
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if (material.flags & pbr_types::STANDARD_MATERIAL_FLAGS_UNLIT_BIT) == 0u {
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let double_sided = (material.flags & pbr_types::STANDARD_MATERIAL_FLAGS_DOUBLE_SIDED_BIT) != 0u;
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let world_normal = pbr_functions::prepare_world_normal(
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in.world_normal,
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double_sided,
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is_front,
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);
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let normal = pbr_functions::apply_normal_mapping(
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material.flags,
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world_normal,
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double_sided,
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is_front,
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#ifdef VERTEX_TANGENTS
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#ifdef STANDARD_MATERIAL_NORMAL_MAP
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in.world_tangent,
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#endif // STANDARD_MATERIAL_NORMAL_MAP
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#endif // VERTEX_TANGENTS
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#ifdef VERTEX_UVS
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in.uv,
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#endif // VERTEX_UVS
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view.mip_bias,
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#ifdef MESHLET_MESH_MATERIAL_PASS
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in.ddx_uv,
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in.ddy_uv,
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#endif // MESHLET_MESH_MATERIAL_PASS
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);
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out.normal = vec4(normal * 0.5 + vec3(0.5), 1.0);
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} else {
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out.normal = vec4(in.world_normal * 0.5 + vec3(0.5), 1.0);
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}
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#endif // NORMAL_PREPASS
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#ifdef MOTION_VECTOR_PREPASS
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#ifdef MESHLET_MESH_MATERIAL_PASS
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out.motion_vector = in.motion_vector;
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#else
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out.motion_vector = pbr_prepass_functions::calculate_motion_vector(in.world_position, in.previous_world_position);
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#endif
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#endif
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return out;
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}
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#else
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@fragment
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fn fragment(in: prepass_io::VertexOutput) {
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pbr_prepass_functions::prepass_alpha_discard(in);
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}
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#endif // PREPASS_FRAGMENT
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