private void Update()
{
// Animation
if (ChkAnimated.IsChecked != null && ChkAnimated.IsChecked.Value)
{
CameraZ = -Math.Abs(Math.Sin(_f)) * (FarPlane - NearPlane) * 1.5;
CameraY = Math.Sin(_f * 10) * 1000;
_f += 0.008;
}
// Create global transformations
var vw = Viewport.ActualWidth;
var vh = Viewport.ActualHeight;
var invertYAxis = Matrix3DFactory.CreateScale(1, -1, 1);
var translate = Matrix3DFactory.CreateTranslation(TranslateX, TranslateY, TranslateZ);
var rotateX = Matrix3DFactory.CreateRotationX(MathHelper.ToRadians(RotateX));
var rotateY = Matrix3DFactory.CreateRotationY(MathHelper.ToRadians(RotateY));
var rotateZ = Matrix3DFactory.CreateRotationZ(MathHelper.ToRadians(RotateZ));
var scale = Matrix3DFactory.CreateScale(ScaleX, ScaleY, ScaleZ);
var lookAt = Matrix3DFactory.CreateLookAtLH(CameraX, CameraY, CameraZ, CameraLookAtX, CameraLookAtY, CameraLookAtZ);
var viewport = Matrix3DFactory.CreateViewportTransformation(vw, vh);
Matrix3D projectionMatrix;
projectionMatrix = ChkPerspective.IsChecked != null && ChkPerspective.IsChecked.Value ? Matrix3DFactory.CreatePerspectiveFieldOfViewLH(MathHelper.ToRadians(FieldOfView), vw / vh, NearPlane, FarPlane) : Matrix3DFactory.CreateOrthographicLH(vw, vh, NearPlane, FarPlane);
// Transform all elements
var selectedMatrix = Matrix3D.Identity;
foreach (var elem in _elements)
{
// The UIElement
var e = elem.Element;
// Create basic transformation matrices
var centerAtOrigin = Matrix3DFactory.CreateTranslation(-e.ActualWidth * 0.5, -e.ActualHeight * 0.5, 0);
var baseTranslate = Matrix3DFactory.CreateTranslation(elem.PositionX, elem.PositionY, elem.PositionZ);
// Combine the transformation matrices
var m = Matrix3D.Identity;
m = m * centerAtOrigin;
m = m * invertYAxis;
// Apply the world transformation to the selected element
if (elem == _selectedElement)
{
m = m * scale;
m = m * rotateX * rotateY * rotateZ;
m = m * translate;
// Should the camera target be fixed at the selected element?
if (ChkLookAtSelected.IsChecked != null && ChkLookAtSelected.IsChecked.Value)
{
lookAt = Matrix3DFactory.CreateLookAtLH(CameraX, CameraY, CameraZ, elem.PositionX, elem.PositionY, elem.PositionZ);
}
}
// Calculate the final view projection matrix
m = m * baseTranslate;
m = Matrix3DFactory.CreateViewportProjection(m, lookAt, projectionMatrix, viewport);
if (elem == _selectedElement)
{
selectedMatrix = m;
}
// Apply the transformation to the UIElement
e.Projection = new Matrix3DProjection {
ProjectionMatrix = m
};
}
// Trace
TxtTrace1.Text = String.Format("{0} Elements. Matrix:\r\n{1}", _elements.Count, selectedMatrix.Dump());
}