Milky2018/mgstudio/mesh

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Mesh

pub struct Mesh {
  geometry2d : Mesh2dGeometry
}

A minimal mesh asset type (shared by 2D/3D later).

For now we only store 2D triangle geometry (Mesh2dGeometry) because the runtime backends are still bring-up / immediate-mode.

Mesh::from_2d_geometry

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fn Mesh::from_2d_geometry(geometry2d : Mesh2dGeometry) -> Mesh

Mesh2dGeometry

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pub struct Mesh2dGeometry {
  positions : Array[@Milky2018/mgstudio/math.Vec2
Vec2]
  uvs : Array[@Milky2018/mgstudio/math.Vec2
Vec2]
  indices : Array[Int]?
}

A minimal, Bevy-aligned 2D mesh geometry container.

Notes:

Only triangle list is supported for now.
indices=None means the vertex arrays are already laid out as triangles.
UVs are required (matching Bevy mesh conventions) even if a pipeline does not use them yet.

Mesh2dGeometry::encode_triangle_positions_csv

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fn Mesh2dGeometry::encode_triangle_positions_csv(self : Mesh2dGeometry) -> String?

Encodes non-indexed triangle list positions as a comma-separated string: x0,y0,x1,y1,....

Mesh2dGeometry::flatten_interleaved_xy_uv

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fn Mesh2dGeometry::flatten_interleaved_xy_uv(self : Mesh2dGeometry) -> Array[Double]?

Mesh2dGeometry::flatten_positions_xy

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fn Mesh2dGeometry::flatten_positions_xy(self : Mesh2dGeometry) -> Array[Double]?

Mesh2dGeometry::flatten_triangle_positions_xy

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fn Mesh2dGeometry::flatten_triangle_positions_xy(self : Mesh2dGeometry) -> Array[Double]?

Returns a non-indexed triangle-list position buffer (xy per vertex). If the mesh is indexed, this expands indices on the CPU.

Mesh2dGeometry::new

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fn Mesh2dGeometry::new(positions : Array[@Milky2018/mgstudio/math.Vec2
Vec2], uvs : Array[@Milky2018/mgstudio/math.Vec2
Vec2], indices : Array[Int]?) -> Mesh2dGeometry

Mesh2dGeometry::triangle_count

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fn Mesh2dGeometry::triangle_count(self : Mesh2dGeometry) -> Int?

Mesh2dGeometry::validate

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fn Mesh2dGeometry::validate(self : Mesh2dGeometry) -> Mesh2dValidationError?

Mesh2dGeometry::vertex_count

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fn Mesh2dGeometry::vertex_count(self : Mesh2dGeometry) -> Int

Mesh2dValidationError

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pub(all) enum Mesh2dValidationError {
  EmptyVertices
  AttributeLengthMismatch(Int, Int)
  NonIndexedVertexCountNotMultipleOf3(Int)
  IndicesEmpty
  IndicesCountNotMultipleOf3(Int)
  IndexOutOfBounds(Int, Int)
}