/// <summary>
/// Creates the cornell box.
/// </summary>
/// <param name="roomSize">Size of the room.</param>
/// <param name="sphereRadius">The sphere radius.</param>
/// <param name="cubeSize">Size of the cube.</param>
/// <returns></returns>
public static DefaultMesh CreateCornellBox(float roomSize = 2, float sphereRadius = 0.3f, float cubeSize = 0.6f)
{
var mesh = new DefaultMesh();
//off-center plane
var plane = CreatePlane(roomSize, roomSize, 2, 2).Transform(new Translation3D(0, -roomSize / 2, 0));
plane.SetConstantUV(new Vector2(0, 0));
mesh.Add(plane); //bottom
//rotate plane repeatedly to create box
mesh.Add(plane.Transform(new Rotation3D(Axis.X, 90f))); //front
mesh.Add(plane.Transform(new Rotation3D(Axis.X, -90f))); //back
plane.SetConstantUV(new Vector2(1, 0));
mesh.Add(plane.Transform(new Rotation3D(Axis.Z, 90f))); //right
plane.SetConstantUV(new Vector2(2, 0));
mesh.Add(plane.Transform(new Rotation3D(Axis.Z, 270f))); //left
plane.SetConstantUV(new Vector2(0, 0));
mesh.Add(plane.Transform(new Rotation3D(Axis.Z, 180f))); //top
var sphere = CreateSphere(sphereRadius, 4);
sphere.SetConstantUV(new Vector2(3, 0));
mesh.Add(sphere.Transform(new Translation3D(0.4f, -1 + sphereRadius, -0.2f)));
var cube = CreateCubeWithNormals(cubeSize);
var trans = new Translation3D(-0.5f, -1 + 0.5f * cubeSize, 0.1f);
var translateAndRotY = new Rotation3D(Axis.Y, 35f, trans);
cube.SetConstantUV(new Vector2(3, 0));
mesh.Add(cube.Transform(translateAndRotY));
return(mesh);
}
/// <summary>
/// Calculates the view matrix.
/// </summary>
/// <returns></returns>
public Matrix4x4 CalcViewMatrix()
{
var t = new Translation3D(-Position);
var mtxTranslate = Matrix4x4.Transpose(Matrix4x4.CreateTranslation(-Position));
var mtxRotate = CalcRotationMatrix();
return(mtxRotate * mtxTranslate);
}
