Method keep_cells

splashsurf_lib/src/mesh.rs:1262–1298

Returns a new mesh containing only the specified cells and removes all unreferenced vertices and attributes

(&self, cell_indices: &[usize], keep_all_vertices: bool)

    /// Returns a new mesh containing only the specified cells and removes all unreferenced vertices and attributes
    fn keep_cells(&self, cell_indices: &[usize], keep_all_vertices: bool) -> Self {
        // Filter internal mesh
        let mut new_mesh = if keep_all_vertices {
            let mut new_mesh = keep_cells_impl(self, cell_indices, &[]);
            new_mesh.point_attributes = self.point_attributes.clone();
            new_mesh
        } else {
            let vertex_keep_table = vertex_keep_table(self, cell_indices);
            let mut new_mesh = keep_cells_impl(self, cell_indices, &vertex_keep_table);

            let vertex_indices = vertex_keep_table
                .iter()
                .copied()
                .enumerate()
                .filter_map(|(i, should_keep)| if should_keep { Some(i) } else { None })
                .collect::<Vec<_>>();

            // Filter the point attributes
            new_mesh.point_attributes = self
                .point_attributes
                .iter()
                .map(|attr| attr.keep_indices(&vertex_indices))
                .collect();

            new_mesh
        };

        // Filter the cell attributes
        let cell_attributes = self
            .cell_attributes
            .iter()
            .map(|attr| attr.keep_indices(cell_indices))
            .collect();
        new_mesh.cell_attributes = cell_attributes;

        new_mesh
    }
}

/// Returns an mesh data wrapper with a default mesh and without attached attributes