/// <inheritdoc />
public void Update(TimeSpan elapsed)
{
//// Pan up - rotate forward and up around their cross product
if (view.IsKeyDown(Keys.W))
{
latitude += RotationSpeed * (float)elapsed.TotalSeconds;
latitude = (float)Math.Min(latitude, Math.PI / 2f);
}
//// Pan down - rotate forward and up around their cross product
if (view.IsKeyDown(Keys.S))
{
latitude -= RotationSpeed * (float)elapsed.TotalSeconds;
latitude = (float)Math.Max(latitude, -Math.PI / 2f);
}
//// Pan right - rotate forward around up
if (view.IsKeyDown(Keys.D))
{
longitude += RotationSpeed * (float)elapsed.TotalSeconds;
longitude = longitude % (float)(2f * Math.PI);
}
//// Pan left - rotate forward around up
if (view.IsKeyDown(Keys.A))
{
longitude -= RotationSpeed * (float)elapsed.TotalSeconds;
longitude = longitude % (float)(2f * Math.PI);
}
//// Zoom
zoomLevel += (int)view.MouseState.ScrollDelta.Y;
// Projection matrix
Projection = Matrix4.CreatePerspectiveFieldOfView(
FieldOfViewRadians,
view.AspectRatio,
NearPlaneDistance,
FarPlaneDistance);
// Camera matrix
var longitudeRot = Quaternion.FromAxisAngle(Vector3.UnitY, longitude);
var x = Vector3.Transform(Vector3.UnitX, longitudeRot);
var latitudeRot = Quaternion.FromAxisAngle(Vector3.Cross(x, Vector3.UnitY), latitude);
this.forward = -Vector3.Transform(x, latitudeRot);
this.up = Vector3.Transform(Vector3.UnitY, latitudeRot);
View = Matrix4.LookAt(Position, Vector3.Zero, up);
}
/// <inheritdoc />
public void Update(TimeSpan elapsed)
{
//// Pan up - rotate forward and up around their cross product
if (view.IsKeyDown(Keys.W))
{
var t = Quaternion.FromAxisAngle(Vector3.Cross(forward, up), -RotationSpeed);
forward = Vector3.Transform(forward, t);
up = Vector3.Transform(up, t);
}
//// Pan down - rotate forward and up around their cross product
if (view.IsKeyDown(Keys.S))
{
var t = Quaternion.FromAxisAngle(Vector3.Cross(forward, up), RotationSpeed);
forward = Vector3.Normalize(Vector3.Transform(forward, t));
up = Vector3.Normalize(Vector3.Transform(up, t));
}
//// Pan right - rotate forward around up
if (view.IsKeyDown(Keys.D))
{
forward = Vector3.Normalize(Vector3.Transform(forward, Quaternion.FromAxisAngle(up, RotationSpeed)));
}
//// Pan left - rotate forward around up
if (view.IsKeyDown(Keys.A))
{
forward = Vector3.Normalize(Vector3.Transform(forward, Quaternion.FromAxisAngle(up, -RotationSpeed)));
}
//// Roll right - rotate up around forward
if (view.IsKeyDown(Keys.Q))
{
up = Vector3.Normalize(Vector3.Transform(up, Quaternion.FromAxisAngle(forward, -RollSpeed)));
}
//// Roll left - rotate up around forward
if (view.IsKeyDown(Keys.E))
{
up = Vector3.Normalize(Vector3.Transform(up, Quaternion.FromAxisAngle(forward, RollSpeed)));
}
//// Zoom
zoomLevel += (int)view.MouseState.ScrollDelta.Y;
// Projection matrix
Projection = Matrix4.CreatePerspectiveFieldOfView(
FieldOfViewRadians,
view.AspectRatio,
NearPlaneDistance,
FarPlaneDistance);
// Camera matrix
View = Matrix4.LookAt(Position, Vector3.Zero, up);
}
} // = 100f;
/// <inheritdoc />
public void Update(TimeSpan elapsed)
{
if (view.LockCursor)
{
// Compute new orientation
var xDiff = view.CenterOffset.X;
xDiff = Math.Abs(xDiff) < 2 ? 0 : xDiff;
horizontalAngle -= RotationSpeed * xDiff;
var yDiff = view.CenterOffset.Y;
yDiff = Math.Abs(yDiff) < 2 ? 0 : yDiff;
verticalAngle -= RotationSpeed * yDiff;
verticalAngle = Math.Max(-(float)Math.PI / 2, Math.Min(verticalAngle, (float)Math.PI / 2));
}
// Direction: Spherical coordinates to Cartesian coordinates conversion
var direction = new Vector3(
(float)(Math.Cos(verticalAngle) * Math.Sin(horizontalAngle)),
(float)Math.Sin(verticalAngle),
(float)(Math.Cos(verticalAngle) * Math.Cos(horizontalAngle)));
// Right vector
var right = new Vector3(
(float)Math.Sin(horizontalAngle - 3.14f / 2.0f),
0,
(float)Math.Cos(horizontalAngle - 3.14f / 2.0f));
// Up vector
var up = Vector3.Cross(right, direction);
//// Move forward
if (view.IsKeyDown(Keys.W))
{
Position += direction * (float)elapsed.TotalSeconds * MovementSpeed;
}
//// Move backward
if (view.IsKeyDown(Keys.S))
{
Position -= direction * (float)elapsed.TotalSeconds * MovementSpeed;
}
//// Strafe right
if (view.IsKeyDown(Keys.D))
{
Position += right * (float)elapsed.TotalSeconds * MovementSpeed;
}
//// Strafe left
if (view.IsKeyDown(Keys.A))
{
Position -= right * (float)elapsed.TotalSeconds * MovementSpeed;
}
Projection = Matrix4.CreatePerspectiveFieldOfView(
FieldOfViewRadians,
view.AspectRatio,
NearPlaneDistance,
FarPlaneDistance);
// Camera matrix
View = Matrix4.LookAt(
Position, // Camera is here
Position + direction, // and looks here : at the same position, plus "direction"
up); // Head is up (set to 0,-1,0 to look upside-down)
}
