Break mesh, expand vertex instances

Break the topology of a mesh by expanding all vertices.

Usage

break_mesh(x)

Arguments

x

mesh3d, from e.g. quad()

Value

mesh3d

Details

Data in a mesh and in rgl is inherently topological, but we can have primitives that independent, out of an original mesh. Expanding every vertex makes primitives geometrically independent, so attributes (colours, texture coordinates) can be constant per face rather than interpolated between shared vertices - the discrete rendering of a continuous mesh, at the cost of four times the vertices. This is the dquadmesh idea from quadmesh package.

See also

Other textures: quad(), quad_spec()

Examples

(mesh <- quad(c(3, 3)))
#>  mesh3d object with 16 vertices, 9 quads.
## same number of primitives, more vertices (every coordinate)
break_mesh(mesh)
#>  mesh3d object with 36 vertices, 9 quads.