Tensors and media

Tensor[T] is a packed numeric value with an element type, shape, and strides. Use List[T] for general values such as records and functions. A nested typed literal constructs a tensor directly:

let matrix = [[1, 2], [3, 4]]:f32;

Every nested row must have the same shape. [[1, 2], [3]]:f32 is a compile error, before allocation or execution. A tensor literal has one numeric dtype; mixed element types are also rejected.

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let matrix: Tensor[i32] = [[1, 2, 3], [4, 5, 6]]:i32; let row = [10, 20, 30]:i32; let shifted = (matrix + row)?; let reversed = matrix[:, ::-1]?; print(shifted.shape()); print(shifted[1, 2]?); print(reversed[0, 0]?); print(matrix.sum()?); print((matrix.transpose()?).shape());

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Read and transform data

matrix.get([1, 0]) returns Opt[T]. matrix.shape() returns the extents. The operations that can fail return Res[..., DataError]:

let transposed = matrix.transpose()?;
let column = matrix.reshape([4, 1])?;
let total = matrix.sum()?;
let product = matrix.matmul(matrix)?;
let pixels = matrix.convert[u8]()?;

reshape checks the element count, transpose checks its axis permutation, and matmul checks dtype and compatible matrix dimensions. Scalar and tensor arithmetic use the same checked data errors. The ? requires a compatible Res or Opt return context; see Enums and results.

Inspect accepted values

Click a tensor name in the code, or select a stored value in Debug, to see its first values, shape, min/max, mean, standard deviation and histogram. Press Alt+Enter to inspect the symbol at the cursor. Statistics identify sampled values and approximate results; exact numeric previews retain their precision. Inspection reads accepted state without running code or changing the scene.

Feed geometry

Mesh.positions is Tensor[f32] with shape [vertices, 3]; Mesh.indices is Tensor[u32] with shape [triangles, 3].

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let coordinates = [[0, 0, 0], [1, 0, 0], [0, 1, 0]]:f32; let offset = [-0.5, -0.5, 0]:f32; let item = spawn(Mesh { positions: (coordinates + offset)?, indices: [[0, 1, 2]]:u32 }); add(item, Material { color: "#6fe3ff" }); print(get[Mesh](item).positions.shape());

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The renderer reads logical coordinates, including strided views, and validates coordinate limits, topology, and triangle area before accepting a scene change. Decoded media remains a host boundary: a tensor describes accepted pixels or samples, while capture, codecs, playback, and streams require a host contract.