public static MeshData CreateBox(float width, float height, float depth) {
var ret = new MeshData();
var w2 = 0.5f * width;
var h2 = 0.5f * height;
var d2 = 0.5f * depth;
// front
ret.Vertices.Add(new Vertex(-w2, -h2, -d2, 0, 0, -1, 1, 0, 0, 0, 1));
ret.Vertices.Add(new Vertex(-w2, +h2, -d2, 0, 0, -1, 1, 0, 0, 0, 0));
ret.Vertices.Add(new Vertex(+w2, +h2, -d2, 0, 0, -1, 1, 0, 0, 1, 0));
ret.Vertices.Add(new Vertex(+w2, -h2, -d2, 0, 0, -1, 1, 0, 0, 1, 1));
// back
ret.Vertices.Add(new Vertex(-w2, -h2, +d2, 0, 0, 1, -1, 0, 0, 1, 1));
ret.Vertices.Add(new Vertex(+w2, -h2, +d2, 0, 0, 1, -1, 0, 0, 0, 1));
ret.Vertices.Add(new Vertex(+w2, +h2, +d2, 0, 0, 1, -1, 0, 0, 0, 0));
ret.Vertices.Add(new Vertex(-w2, +h2, +d2, 0, 0, 1, -1, 0, 0, 1, 0));
// top
ret.Vertices.Add(new Vertex(-w2, +h2, -d2, 0, 1, 0, 1, 0, 0, 0, 1));
ret.Vertices.Add(new Vertex(-w2, +h2, +d2, 0, 1, 0, 1, 0, 0, 0, 0));
ret.Vertices.Add(new Vertex(+w2, +h2, +d2, 0, 1, 0, 1, 0, 0, 1, 0));
ret.Vertices.Add(new Vertex(+w2, +h2, -d2, 0, 1, 0, 1, 0, 0, 1, 1));
// bottom
ret.Vertices.Add(new Vertex(-w2, -h2, -d2, 0, -1, 0, -1, 0, 0, 1, 1));
ret.Vertices.Add(new Vertex(+w2, -h2, -d2, 0, -1, 0, -1, 0, 0, 0, 1));
ret.Vertices.Add(new Vertex(+w2, -h2, +d2, 0, -1, 0, -1, 0, 0, 0, 0));
ret.Vertices.Add(new Vertex(-w2, -h2, +d2, 0, -1, 0, -1, 0, 0, 1, 0));
// left
ret.Vertices.Add(new Vertex(-w2, -h2, +d2, -1, 0, 0, 0, 0, -1, 0, 1));
ret.Vertices.Add(new Vertex(-w2, +h2, +d2, -1, 0, 0, 0, 0, -1, 0, 0));
ret.Vertices.Add(new Vertex(-w2, +h2, -d2, -1, 0, 0, 0, 0, -1, 1, 0));
ret.Vertices.Add(new Vertex(-w2, -h2, -d2, -1, 0, 0, 0, 0, -1, 1, 1));
// right
ret.Vertices.Add(new Vertex(+w2, -h2, -d2, 1, 0, 0, 0, 0, 1, 0, 1));
ret.Vertices.Add(new Vertex(+w2, +h2, -d2, 1, 0, 0, 0, 0, 1, 0, 0));
ret.Vertices.Add(new Vertex(+w2, +h2, +d2, 1, 0, 0, 0, 0, 1, 1, 0));
ret.Vertices.Add(new Vertex(+w2, -h2, +d2, 1, 0, 0, 0, 0, 1, 1, 1));
ret.Indices.AddRange(new[] {
0, 1, 2, 0, 2, 3,
4, 5, 6, 4, 6, 7,
8, 9, 10, 8, 10, 11,
12, 13, 14, 12, 14, 15,
16, 17, 18, 16, 18, 19,
20, 21, 22, 20, 22, 23
});
return ret;
}
