createTransform#positionPtr¶

Summary¶

createTransform#positionPtr returns the WebAssembly memory pointer to this transform's local position vector. The pointer references three contiguous f32 values (x, y, z) in the global transform store. Use this for read-only interop with WasmGPU memory views or custom WASM routines. Writing through the pointer bypasses the transform's JavaScript value and dirty tracking; update position through setPosition() or translate().

Syntax¶

WasmGPU.createTransform().positionPtr: WasmPtr
const ptr = transform.positionPtr;

Parameters¶

This API does not take parameters.

Returns¶

WasmPtr - Byte offset into WebAssembly linear memory for local position.

Reacquire both the pointer and its typed view immediately before use. Transform-store capacity growth can relocate the backing arrays, WebAssembly memory growth invalidates existing typed-array views, and dispose() releases the slot.

Type Details¶

type WasmPtr = number;

Example¶

const canvas = document.querySelector("canvas");
const wgpu = await WasmGPU.create(canvas);

const t = wgpu.createTransform().setPosition(1, 2, 3);
const ptr = t.positionPtr;
const xyz = wgpu.driver.view(Float32Array, ptr, 3);

console.log(ptr, Array.from(xyz));