Struct GeometryBuffers 

pub struct GeometryBuffers {
    pub vertex_buffer: Buffer,
    pub index_buffer: Buffer,
    pub instance_buffer: Buffer,
    pub max_vertices: usize,
    pub max_indices: usize,
}

Group of three GPU buffers used for geometry rendering: vertex, index, and instance. Owned by the renderer and used for every draw call.

Fields

vertex_buffer: Buffer

Vertex buffer. Stores Vertex (position + normal + uv + color).

index_buffer: Buffer

Index buffer. Stores u32 indices into the vertex buffer.

instance_buffer: Buffer

Instance buffer. Stores InstanceData for instanced rendering.

max_vertices: usize

Capacity in vertices (used to size the vertex and instance buffers).

max_indices: usize

Capacity in indices (used to size the index buffer).

Implementations

impl GeometryBuffers

pub fn forge(device: &Device, max_vertices: usize, max_indices: usize) -> Self

Create the three geometry buffers on the given device with the given capacities. The buffers are immediately usable for COPY_DST writes.

pub fn vram_bytes(&self) -> u64

Total VRAM cost of the three buffers in bytes.

pub fn grow_vertex_buffer( &mut self, device: &Device, min_capacity: usize, max_capacity: usize, ) -> bool

Grow the vertex buffer to accommodate at least min_capacity vertices. Returns true if the buffer was actually reallocated (i.e., the previous capacity was too small). Returns false if the buffer was already large enough, avoiding the expensive device.create_buffer() call.

pub fn grow_index_buffer( &mut self, device: &Device, min_capacity: usize, max_capacity: usize, ) -> bool

Grow the index buffer to accommodate at least min_capacity indices. Returns true if the buffer was actually reallocated. Returns false if the buffer was already large enough.