/// <summary>
/// This update method gets called on each update pass for each scenes
/// this component is attached to.
/// </summary>
/// <param name="updateState">Current update state.</param>
/// <param name="correspondingView">The view which attached this component (may be null).</param>
protected override void Update(SceneRelatedUpdateState updateState, ViewInformation correspondingView)
{
Camera3DBase actCamera = correspondingView.Camera;
if (actCamera == null)
{
return;
}
foreach (InputFrame actInputFrame in updateState.InputFrames)
{
foreach (var actInputState in actInputFrame.GetInputStates(correspondingView))
{
// Handle keyboard
KeyboardState actKeyboardState = actInputState as KeyboardState;
bool isControlKeyDown = false;
if (actKeyboardState != null)
{
UpdateForKeyboard(actCamera, actKeyboardState, out isControlKeyDown);
continue;
}
// Handle mouse (or pointer)
MouseOrPointerState mouseState = actInputState as MouseOrPointerState;
if (mouseState != null)
{
UpdateForMouse(actCamera, isControlKeyDown, mouseState);
}
}
}
}
/// <summary>
/// Update camera for mouse input.
/// </summary>
private static void UpdateForMouse(
PerSceneContext componentContext, Camera3DBase actCamera,
MouseOrPointerState mouseState)
{
// Handle mouse move
if (mouseState.MoveDistanceDip != Vector2.Zero)
{
Vector2 moving = mouseState.MoveDistanceDip;
if (mouseState.IsButtonDown(MouseButton.Left) &&
mouseState.IsButtonDown(MouseButton.Right))
{
float multiplyer = 1.05f;
if (moving.Y < 0f)
{
multiplyer = 0.95f;
}
componentContext.CameraDistance = componentContext.CameraDistance * multiplyer;
}
else if (mouseState.IsButtonDown(MouseButton.Left) ||
mouseState.IsButtonDown(MouseButton.Right))
{
componentContext.CameraHVRotation = componentContext.CameraHVRotation +
new Vector2(
SINGLE_ROTATION_H * (moving.X / 4f),
SINGLE_ROTATION_V * (moving.Y / 4f));
}
}
// Handle mouse wheel
if (mouseState.WheelDelta != 0)
{
float multiplyer = 0.95f - (Math.Abs(mouseState.WheelDelta) / 1000f);
if (mouseState.WheelDelta < 0)
{
multiplyer = 1.05f + (Math.Abs(mouseState.WheelDelta) / 1000f);
}
componentContext.CameraDistance = componentContext.CameraDistance * multiplyer;
}
}
protected override void Update(SceneRelatedUpdateState updateState, ViewInformation correspondingView, PerSceneContext componentContext)
{
Camera3DBase actCamera = correspondingView.Camera;
if (actCamera == null)
{
return;
}
foreach (InputFrame actInputFrame in updateState.InputFrames)
{
foreach (var actInputState in actInputFrame.GetInputStates(correspondingView))
{
// Handle keyboard
KeyboardState actKeyboardState = actInputState as KeyboardState;
if (actKeyboardState != null)
{
UpdateForKeyboard(componentContext, actCamera, actKeyboardState);
continue;
}
// Handle mouse (or pointer)
MouseOrPointerState mouseState = actInputState as MouseOrPointerState;
if (mouseState != null)
{
UpdateForMouse(componentContext, actCamera, mouseState);
}
}
}
// Ensure that our values are in allowed ranges
float maxRad = EngineMath.RAD_90DEG * 0.99f;
float minRad = EngineMath.RAD_90DEG * -0.99f;
componentContext.CameraHVRotation.X = componentContext.CameraHVRotation.X % EngineMath.RAD_360DEG;
if (componentContext.CameraDistance < this.CameraDistanceMin)
{
componentContext.CameraDistance = this.CameraDistanceMin;
}
if (componentContext.CameraDistance > this.CameraDistanceMax)
{
componentContext.CameraDistance = this.CameraDistanceMax;
}
if (componentContext.CameraHVRotation.Y <= minRad)
{
componentContext.CameraHVRotation.Y = minRad;
}
if (componentContext.CameraHVRotation.Y >= maxRad)
{
componentContext.CameraHVRotation.Y = maxRad;
}
// Update camera position and rotation
Vector3 cameraOffset = Vector3.UnitX;
cameraOffset = Vector3.TransformNormal(
cameraOffset,
Matrix4x4.CreateRotationY(componentContext.CameraHVRotation.X));
cameraOffset = Vector3.TransformNormal(
cameraOffset,
Matrix4x4.CreateFromAxisAngle(Vector3.Cross(cameraOffset, Vector3.UnitY), componentContext.CameraHVRotation.Y));
Vector3 focusedLocation = this.GetFocusedLocation();
actCamera.Position = focusedLocation + cameraOffset * componentContext.CameraDistance;
actCamera.Target = focusedLocation;
}
/// <summary>
/// Update camera for mouse input.
/// </summary>
private static void UpdateForMouse(Camera3DBase actCamera, bool isControlKeyDown, MouseOrPointerState mouseState)
{
// Handle mouse move
if (mouseState.MoveDistanceDip != Vector2.Zero)
{
var moving = mouseState.MoveDistanceDip;
if (mouseState.IsButtonDown(MouseButton.Left) &&
mouseState.IsButtonDown(MouseButton.Right))
{
actCamera.Zoom(moving.Y / -50f);
}
else if (mouseState.IsButtonDown(MouseButton.Left))
{
actCamera.Strave(moving.X / 50f);
actCamera.UpDown(-moving.Y / 50f);
}
else if (mouseState.IsButtonDown(MouseButton.Right))
{
actCamera.Rotate(-moving.X / 200f, -moving.Y / 200f);
}
}
// Handle mouse wheel
if (mouseState.WheelDelta != 0)
{
var multiplier = 1f;
if (isControlKeyDown)
{
multiplier = 2f;
}
actCamera.Zoom(mouseState.WheelDelta / 100f * multiplier);
}
}