private static Vector4[] CreateInstancePositionMaterial(uint xCount, uint zCount)
{
var rnd = new Random(12);
float Rnd01() => (float)rnd.NextDouble();
float Color() => Rnd01();
var positions = new List <Vector4>();
void CreateVertex(float x, float z) => positions.Add(new Vector4(x, 0.01f, z, Color()));
ShapeBuilder.Grid(-1, 2, -1, 2, xCount - 1, zCount - 1, CreateVertex, null, null, null);
return(positions.ToArray());
}
