Help with building geometry and shading

[davidh71]

Hi, I'm coming over from babylon - hoping this library can be more performant and it looks to be!
I need to build my own custom meshes and i found your triangle example. I've tried adding to it without much success.

• does the position.fromArray calculate the normals ?
• is there other ways of specifying geometry
• why is the model black in my example?

thanks for pushing me in the right direction!!!!

var TRIANGLE_POSITIONS = [
    [-0.5, -0.5, 0],
    [0.5, -0.5, 0],
    [0, 0.5, 0],

	[0.5, -0.5, 0],
	[0, 0.5, -1],
	[0, 0.5, 0],

];

 clay.application.create("#main", {

	width: window.innerWidth,
	height: window.innerHeight,

    init: function (app) {
        var camera = app.createCamera([6, 15, 15], [0, 0, 0]);

        // Create a empty geometry and set the triangle vertices
        var geometry = new clay.StaticGeometry();
        geometry.attributes.position.fromArray(TRIANGLE_POSITIONS);


        var mesh = app.createMesh(geometry, {
            shader: 'clay.lambert'
        });
        mesh.material.set('color', 'blue');

        // Create lights.
        var directionalLight = app.createDirectionalLight([10, 10, 10]);
        directionalLight.shadowResolution = 1024;
        this._pointLight = app.createPointLight([30, 30, 0], 100, '#fff', 1);


        this._control = new clay.plugin.OrbitControl({
            target: camera,
            domElement: app.container
        });		
    },

    loop: function (app) {
		this._control.update(app.deltaTime);
	}
});