Struct InstanceDesc2D

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pub struct InstanceDesc2D {
    pub pos_attr: Pos2DATTR,
    pub rot_attr: Rot2DATTR,
    pub scale_attr: Scale2DATTR,
    pub col_attr: ColATTR,
    pub cus_attrs: Vec<CustomATTR>,
}

Expand description

Descriptor for preparing 2D instance data before uploading it to the GPU.

Like InstanceDesc3D, but uses 2-element vectors for position and scale and single-precision scalars for rotation (angle in radians). The same interleaving, validation, and upload semantics apply.

§Attribute layout

pos — 2 × f32 (8 bytes)
rot — 1 × f32 angle (4 bytes)
scale — 2 × f32 (8 bytes)
col — 4 × f32 RGBA (16 bytes)
custom attributes, in insertion order

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§pos_attr: Pos2DATTR§rot_attr: Rot2DATTR§scale_attr: Scale2DATTR§col_attr: ColATTR§cus_attrs: Vec<CustomATTR>

Implementations§

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impl InstanceDesc2D

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pub fn empty() -> Self

Creates an empty 2D descriptor.

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pub fn attach_custom_attr(&mut self, attr: CustomATTR) -> &mut Self

Appends a custom attribute for chaining.

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pub fn ship(&self) -> OpticResult<InstanceBuffer>

Interleaves all non-empty 2D attributes and uploads to a new GPU buffer.

§Errors

Same error conditions as InstanceDesc3D::ship.

Auto Trait Implementations§

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impl UnwindSafe for InstanceDesc2D

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