public Cube4D(Vector3 origin1, Vector3 origin2, float size1, float size2)
{
// z negative (back) points
var a1 = new Vector4(origin1.X - size1, origin1.Y - size1, origin1.Z - size1, 0);
var a2 = new Vector4(origin2.X - size2, origin2.Y - size2, origin2.Z - size2, 1);
var b1 = new Vector4(origin1.X - size1, origin1.Y + size1, origin1.Z - size1, 0);
var b2 = new Vector4(origin2.X - size2, origin2.Y + size2, origin2.Z - size2, 1);
var c1 = new Vector4(origin1.X + size1, origin1.Y - size1, origin1.Z - size1, 0);
var c2 = new Vector4(origin2.X + size2, origin2.Y - size2, origin2.Z - size2, 1);
var d1 = new Vector4(origin1.X + size1, origin1.Y + size1, origin1.Z - size1, 0);
var d2 = new Vector4(origin2.X + size2, origin2.Y + size2, origin2.Z - size2, 1);
// z positive (front) points
var e1 = new Vector4(origin1.X - size1, origin1.Y - size1, origin1.Z + size1, 0);
var e2 = new Vector4(origin2.X - size2, origin2.Y - size2, origin2.Z + size2, 1);
var f1 = new Vector4(origin1.X - size1, origin1.Y + size1, origin1.Z + size1, 0);
var f2 = new Vector4(origin2.X - size2, origin2.Y + size2, origin2.Z + size2, 1);
var g1 = new Vector4(origin1.X + size1, origin1.Y - size1, origin1.Z + size1, 0);
var g2 = new Vector4(origin2.X + size2, origin2.Y - size2, origin2.Z + size2, 1);
var h1 = new Vector4(origin1.X + size1, origin1.Y + size1, origin1.Z + size1, 0);
var h2 = new Vector4(origin2.X + size2, origin2.Y + size2, origin2.Z + size2, 1);
/*
var rand = new Random();
a1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
a2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
b1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
b2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
c1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
c2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
d1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
d2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
e1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
e2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
f1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
f2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
g1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
g2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
h1 *= (float)(rand.NextDouble() * 0.5 + 0.5);
h2 *= (float)(rand.NextDouble() * 0.5 + 0.5);
*/
// faces
back = new Quad4D(c1, c2, d1, d2, a1, a2, b1, b2);
front = new Quad4D(e1, e2, f1, f2, g1, g2, h1, h2);
top = new Quad4D(f1, f2, b1, b2, h1, h2, d1, d2);
bottom = new Quad4D(a1, a2, e1, e2, c1, c2, g1, g2);
left = new Quad4D(a1, a2, b1, b2, e1, e2, f1, f2);
right = new Quad4D(g1, g2, h1, h2, c1, c2, d1, d2);
}
protected override void Initialize()
{
primitives[0] = new Cube3D(new Vector3(-2, 1, -4), new Vector3(4, 2, 5));
primitives[1] = new Cube3D(new Vector3(-2, -1, -4), new Vector3(1, 2, 5));
primitives[2] = new Cube3D(new Vector3(1, -1, -4), new Vector3(1, 2, 5));
primitives[3] = new Quad4D(
new Vector4(-1, -1, 1, 0), new Vector4(-1, -1, -4, 1),
new Vector4(-1, 1, 1, 0), new Vector4(-1, 1, -4, 1),
new Vector4(1, -1, 1, 0), new Vector4(1, -1, -4, 1),
new Vector4(1, 1, 1, 0), new Vector4(1, 1, -4, 1)
);
camera = new Vector3(0, 0, 5);
View = Matrix.CreateLookAt(camera, Vector3.Zero,
Vector3.Up);
Projection = Matrix.CreatePerspectiveFieldOfView(
MathHelper.PiOver4, 4.0f / 3.0f, 1, 500);
base.Initialize();
}