Struct Primitive

pub struct Primitive { /* private fields */ }

A primitive consisting of a material and a subset of vertices using a particular range of indices

This might be, for example, the arm of a robot.

The Primitive depends on being in an 3D model crate::Object (or its derived crate::Instantiable, as it is the object that contains the actual materials and vertices to use

This SHOULD be optimized to fit within half a cache line (32 bytes)

Missing:

uses bones? index type (u8, u16, u32) - is this part of indices?

Implementations

impl Primitive

pub fn new( primitive_type: PrimitiveType, vertices_index: ShortIndex, byte_offset: u32, index_count: u32, material_index: ShortIndex, ) -> Self

Create a new Primitive from a Vertices

use the indices’ BufferView.ele_type: BufferElementType as index size

pub fn vertices(&self) -> (Option<usize>, u32, u32)

Retrieve the data for the vertices in the primitive

This is the vertices index, the offset index, and the count

pub fn material(&self) -> ShortIndex

Retrieve the material for the primitive - this is the material index

pub fn primitive_type(&self) -> PrimitiveType

Retrieve the PrimitiveType of the primitive

pub fn vertices_index(&self) -> ShortIndex

Retrieve the index into the crate::Object vertices array that this primitive uses

pub fn material_index(&self) -> ShortIndex

Retrieve the index into the crate::Object materials array that this primitive uses

pub fn index_count(&self) -> u32

Get the number of indices required to draw this primitive

pub fn byte_offset(&self) -> u32

Get the byte offset within the indices buffer view to the first byte used by this primitive

Trait Implementations

impl Clone for Primitive

fn clone(&self) -> Primitive

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Primitive

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.