gl-tetrahedron

gl-tetrahedron

This has been forked from mattdesl's awesome work. I stand on his shoulders.

Creates an indexed tetrahedron that you can draw.

The side lengths of the tetrahedron are 1 by default. The "top" vertex lies on the positive z axis while the "bottom" of the tetrahedron is parallel to the xy plane. The tetrahedron is centered at the origin. This is intended to make it easy to use in utilities where you need some kind of direction indicator. For example, I use it in my gl-vector-field (http://github.com/coballast/gl-vector-field) repo as a default direction mesh. I apply non uniform scaling in the shader to indicate magnitude.

Usage

var gl = require('webgl-context')

var tetra = require('gl-tetrahedron')(gl)
tetra.draw( myShader )

The passed shader is expected to have position and normal attributes.

functions

var tetra = createTetra(gl)

Creates a new tetrahedron with position and normal buffers.

tetra.draw([shader])

Draws the tetrahedron with a gl-shader.

If a shader is not passed, it's assumed that you've already bound a shader.

tetra.dispose()

Disposes the tetrahedron.

members

tetra.mesh

The gl-mesh Object backing this tetrahedron.

License

MIT, see LICENSE.md for details.