Robert Swain b333386271 Add reusable shader functions for transforming position/normal/tangent (#4901) ... # Objective - Add reusable shader functions for transforming positions / normals / tangents between local and world / clip space for 2D and 3D so that they are done in a simple and correct way - The next step in #3969 so check there for more details. ## Solution - Add `bevy_pbr::mesh_functions` and `bevy_sprite::mesh2d_functions` shader imports - These contain `mesh_` and `mesh2d_` versions of the following functions: - `mesh_position_local_to_world` - `mesh_position_world_to_clip` - `mesh_position_local_to_clip` - `mesh_normal_local_to_world` - `mesh_tangent_local_to_world` - Use them everywhere where it is appropriate - Notably not in the sprite and UI shaders where `mesh2d_position_world_to_clip` could have been used, but including all the functions depends on the mesh binding so I chose to not use the function there - NOTE: The `mesh_` and `mesh2d_` functions are currently identical. However, if I had defined only `bevy_pbr::mesh_functions` and used that in bevy_sprite, then bevy_sprite would have a runtime dependency on bevy_pbr, which seems undesirable. I also expect that when we have a proper 2D rendering API, these functions will diverge between 2D and 3D. --- ## Changelog - Added: `bevy_pbr::mesh_functions` and `bevy_sprite::mesh2d_functions` shader imports containing `mesh_` and `mesh2d_` versions of the following functions: - `mesh_position_local_to_world` - `mesh_position_world_to_clip` - `mesh_position_local_to_clip` - `mesh_normal_local_to_world` - `mesh_tangent_local_to_world` ## Migration Guide - The `skin_tangents` function from the `bevy_pbr::skinning` shader import has been replaced with the `mesh_tangent_local_to_world` function from the `bevy_pbr::mesh_functions` shader import		2022-06-14 00:32:33 +00:00
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animate_shader.wgsl	Add reusable shader functions for transforming position/normal/tangent (#4901)	2022-06-14 00:32:33 +00:00
custom_material.frag	add some more pipelined-rendering shader examples (#3041)	2022-01-05 19:43:11 +00:00
custom_material.vert	Fixing confusing near and far fields in Camera (#4457)	2022-05-16 16:37:33 +00:00
custom_material.wgsl	Update wgpu to 0.12 and naga to 0.8 (#3375)	2021-12-19 03:03:06 +00:00
custom_material_chromatic_aberration.wgsl	add a post-processing example (#4797)	2022-06-06 00:06:49 +00:00
custom_material_screenspace_texture.wgsl	Split mesh shader files (#4867)	2022-05-31 23:23:25 +00:00
custom_vertex_attribute.wgsl	Add reusable shader functions for transforming position/normal/tangent (#4901)	2022-06-14 00:32:33 +00:00
game_of_life.wgsl	add some more pipelined-rendering shader examples (#3041)	2022-01-05 19:43:11 +00:00
instancing.wgsl	Add reusable shader functions for transforming position/normal/tangent (#4901)	2022-06-14 00:32:33 +00:00
shader_defs.wgsl	Add reusable shader functions for transforming position/normal/tangent (#4901)	2022-06-14 00:32:33 +00:00