some uhh mesh stuff
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177
src/mesh.rs
177
src/mesh.rs
@ -1,4 +1,177 @@
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pub fn convert(roblox_mesh_bytes:crate::data::RobloxMeshBytes)->Result<strafesnet_common::model::Mesh,rbx_mesh::mesh::Error>{
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let versioned_mesh=rbx_mesh::read_versioned(roblox_mesh_bytes.cursor())?;
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use std::collections::HashMap;
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use rbx_mesh::mesh::{Vertex2, Vertex2Truncated};
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use strafesnet_common::{integer::Planar64Vec3,model::{self,ColorId,IndexedVertex,NormalId,PolygonList,PositionId,TextureCoordinateId,VertexId}};
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pub enum Error{
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Planar64Vec3(strafesnet_common::integer::Planar64TryFromFloatError),
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RbxMesh(rbx_mesh::mesh::Error)
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}
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fn ingest_vertices2<
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AcquirePosId,
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AcquireTexId,
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AcquireNormalId,
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AcquireColorId,
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AcquireVertexId,
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>(
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vertices:Vec<Vertex2>,
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mut acquire_pos_id:AcquirePosId,
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mut acquire_tex_id:AcquireTexId,
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mut acquire_normal_id:AcquireNormalId,
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mut acquire_color_id:AcquireColorId,
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mut acquire_vertex_id:AcquireVertexId,
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)->Result<HashMap<VertexId,VertexId>,Error>
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where
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AcquirePosId:FnMut([f32;3])->Result<PositionId,Error>,
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AcquireTexId:FnMut([f32;2])->TextureCoordinateId,
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AcquireNormalId:FnMut([f32;3])->Result<NormalId,Error>,
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AcquireColorId:FnMut([f32;4])->ColorId,
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AcquireVertexId:FnMut(IndexedVertex)->VertexId,
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{
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//this monster is collecting a map of old_vertices_index -> unique_vertices_index
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//while also doing the inserting unique entries into lists simultaneously
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Ok(vertices.into_iter().enumerate().map(|(vertex_id,vertex)|Ok((
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VertexId::new(vertex_id as u32),
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acquire_vertex_id(IndexedVertex{
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pos:acquire_pos_id(vertex.pos)?,
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tex:acquire_tex_id(vertex.tex),
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normal:acquire_normal_id(vertex.norm)?,
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color:acquire_color_id(vertex.color.map(|f|f as f32))
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}),
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))).collect::<Result<_,_>>()?)
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}
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fn ingest_vertices_truncated2<
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AcquirePosId,
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AcquireTexId,
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AcquireNormalId,
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AcquireVertexId,
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>(
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vertices:Vec<Vertex2Truncated>,
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mut acquire_pos_id:AcquirePosId,
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mut acquire_tex_id:AcquireTexId,
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mut acquire_normal_id:AcquireNormalId,
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static_color_id:ColorId,//pick one color and fill everything with it
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mut acquire_vertex_id:AcquireVertexId,
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)->Result<HashMap<VertexId,VertexId>,Error>
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where
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AcquirePosId:FnMut([f32;3])->Result<PositionId,Error>,
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AcquireTexId:FnMut([f32;2])->TextureCoordinateId,
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AcquireNormalId:FnMut([f32;3])->Result<NormalId,Error>,
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AcquireVertexId:FnMut(IndexedVertex)->VertexId,
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{
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//this monster is collecting a map of old_vertices_index -> unique_vertices_index
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//while also doing the inserting unique entries into lists simultaneously
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Ok(vertices.into_iter().enumerate().map(|(vertex_id,vertex)|Ok((
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VertexId::new(vertex_id as u32),
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acquire_vertex_id(IndexedVertex{
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pos:acquire_pos_id(vertex.pos)?,
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tex:acquire_tex_id(vertex.tex),
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normal:acquire_normal_id(vertex.norm)?,
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color:static_color_id
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}),
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))).collect::<Result<_,_>>()?)
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}
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pub fn convert(roblox_mesh_bytes:crate::data::RobloxMeshBytes)->Result<model::Mesh,Error>{
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//generate that mesh boi
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let mut unique_pos=Vec::new();
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let mut pos_id_from=HashMap::new();
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let mut unique_tex=Vec::new();
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let mut tex_id_from=HashMap::new();
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let mut unique_normal=Vec::new();
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let mut normal_id_from=HashMap::new();
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let mut unique_color=Vec::new();
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let mut color_id_from=HashMap::new();
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let mut unique_vertices=Vec::new();
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let mut vertex_id_from=HashMap::new();
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let mut polygon_groups=Vec::new();//only one group is created
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let mut acquire_pos_id=|pos|{
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let p=Planar64Vec3::try_from(pos).map_err(Error::Planar64Vec3)?;
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Ok(PositionId::new(*pos_id_from.entry(p).or_insert_with(||{
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let pos_id=unique_pos.len();
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unique_pos.push(p);
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pos_id
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}) as u32))
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};
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let mut acquire_tex_id=|tex|{
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let h=bytemuck::cast::<[f32;2],[u32;2]>(tex);
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TextureCoordinateId::new(*tex_id_from.entry(h).or_insert_with(||{
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let tex_id=unique_tex.len();
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unique_tex.push(glam::Vec2::from_array(tex));
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tex_id
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}) as u32)
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};
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let mut acquire_normal_id=|normal|{
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let n=Planar64Vec3::try_from(normal).map_err(Error::Planar64Vec3)?;
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Ok(NormalId::new(*normal_id_from.entry(n).or_insert_with(||{
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let normal_id=unique_normal.len();
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unique_normal.push(n);
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normal_id
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}) as u32))
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};
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let mut acquire_color_id=|color|{
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let h=bytemuck::cast::<[f32;4],[u32;4]>(color);
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ColorId::new(*color_id_from.entry(h).or_insert_with(||{
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let color_id=unique_color.len();
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unique_color.push(glam::Vec4::from_array(color));
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color_id
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}) as u32)
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};
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let mut acquire_vertex_id=|vertex:IndexedVertex|{
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VertexId::new(*vertex_id_from.entry(vertex.clone()).or_insert_with(||{
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let vertex_id=unique_vertices.len();
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unique_vertices.push(vertex);
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vertex_id
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}) as u32)
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};
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match rbx_mesh::read_versioned(roblox_mesh_bytes.cursor()).map_err(Error::RbxMesh)?{
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rbx_mesh::mesh::VersionedMesh::Version1(mesh)=>{
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let color_id=acquire_color_id([1.0f32;4]);
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polygon_groups.push(model::PolygonGroup::PolygonList(PolygonList::new(mesh.vertices.chunks_exact(3).map(|trip|{
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let mut ingest_vertex1=|vertex:rbx_mesh::mesh::Vertex1|Ok(acquire_vertex_id(IndexedVertex{
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pos:acquire_pos_id(vertex.pos)?,
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tex:acquire_tex_id([vertex.tex[0],vertex.tex[1]]),
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normal:acquire_normal_id(vertex.norm)?,
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color:color_id,
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}));
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Ok(vec![ingest_vertex1(trip[0])?,ingest_vertex1(trip[1])?,ingest_vertex1(trip[2])?])
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}).collect::<Result<_,_>>()?)));
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},
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rbx_mesh::mesh::VersionedMesh::Version2(mesh)=>{
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let vertex_id_map=match mesh.header.sizeof_vertex{
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rbx_mesh::mesh::SizeOfVertex2::Truncated=>{
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//pick white and make all the vertices white
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let color_id=acquire_color_id([1.0f32;4]);
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ingest_vertices_truncated2(mesh.vertices_truncated,acquire_pos_id,acquire_tex_id,acquire_normal_id,color_id,acquire_vertex_id)?
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},
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rbx_mesh::mesh::SizeOfVertex2::Full=>ingest_vertices2(mesh.vertices,acquire_pos_id,acquire_tex_id,acquire_normal_id,acquire_color_id,acquire_vertex_id)?,
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};
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},
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rbx_mesh::mesh::VersionedMesh::Version3(mesh)=>{
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let vertex_id_map=match mesh.header.sizeof_vertex{
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rbx_mesh::mesh::SizeOfVertex2::Truncated=>{
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let color_id=acquire_color_id([1.0f32;4]);
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ingest_vertices_truncated2(mesh.vertices_truncated,acquire_pos_id,acquire_tex_id,acquire_normal_id,color_id,acquire_vertex_id)?
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},
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rbx_mesh::mesh::SizeOfVertex2::Full=>ingest_vertices2(mesh.vertices,acquire_pos_id,acquire_tex_id,acquire_normal_id,acquire_color_id,acquire_vertex_id)?,
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};
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},
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rbx_mesh::mesh::VersionedMesh::Version4(mesh)=>{
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let vertex_id_map=ingest_vertices2(mesh.vertices,acquire_pos_id,acquire_tex_id,acquire_normal_id,acquire_color_id,acquire_vertex_id)?;
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},
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rbx_mesh::mesh::VersionedMesh::Version5(mesh)=>{
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let vertex_id_map=ingest_vertices2(mesh.vertices,acquire_pos_id,acquire_tex_id,acquire_normal_id,acquire_color_id,acquire_vertex_id)?;
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},
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}
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Ok(model::Mesh{
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unique_pos,
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unique_normal,
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unique_tex,
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unique_color,
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unique_vertices,
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polygon_groups,
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graphics_groups:Vec::new(),
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physics_groups:Vec::new(),
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})
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}
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