public void processInput(KeyboardState kb, MouseDevice md)
{
MouseState m = md.GetState();
// Regulates the speed of which key/mouse presses have influence on rotation, position or FOV of the camera.
float rotateSpeed = .02f * MathHelper.Pi;
float mouseRotateSpeed = 0.0005f * MathHelper.Pi;
float moveSpeed = .1f;
float fovSpeed = .05f;
// Modify the anti-aliasing
if (kb[Key.R] && !lkb[Key.R])
{
rt.IncreaseAntiAliasing();
}
if (kb[Key.F] && !lkb[Key.F])
{
rt.DecreaseAntiAliasing();
}
// Modify the speed up
if ((kb[Key.KeypadPlus] || kb[Key.Plus]) && !(lkb[Key.KeypadPlus] || lkb[Key.Plus]))
{
rt.IncreaseSpeedUp();
}
if ((kb[Key.KeypadMinus] || kb[Key.Minus]) && !(lkb[Key.KeypadMinus] || lkb[Key.Minus]))
{
rt.DecreaseSpeedUp();
}
// Set the speed up to a specific value: number n -> SpeedUp = 2^{n-1}
int speedUp = 1;
for (Key k = Key.Number1; k <= Key.Number9; k++, speedUp *= 2)
{
if (!kb[k] || lkb[k])
{
continue;
}
rt.SetSpeedUp(speedUp);
break;
}
// Rotate up, down absolute
Vector3 dirY = Vector3.UnitY;
if (kb[Key.Left])
{
Rotation = Quaternion.FromAxisAngle(dirY, rotateSpeed) * Rotation;
}
if (kb[Key.Right])
{
Rotation = Quaternion.FromAxisAngle(dirY, -rotateSpeed) * Rotation;
}
// Rotate left, right relative to the current rotation
Vector3 dirX = Rotation * Vector3.UnitX;
if (kb[Key.Up])
{
Rotation = Quaternion.FromAxisAngle(dirX, rotateSpeed) * Rotation;
}
if (kb[Key.Down])
{
Rotation = Quaternion.FromAxisAngle(dirX, -rotateSpeed) * Rotation;
}
// Move the location of the camera
Vector3 delta = Vector3.Zero;
if (kb[Key.A])
{
delta -= Vector3.UnitX;
}
if (kb[Key.D])
{
delta += Vector3.UnitX;
}
if (kb[Key.W])
{
delta -= Vector3.UnitZ;
}
if (kb[Key.S])
{
delta += Vector3.UnitZ;
}
if (kb[Key.Q])
{
delta -= Vector3.UnitY;
}
if (kb[Key.E])
{
delta += Vector3.UnitY;
}
// Adjust to the basis of the camera
Position += Rotation * delta * moveSpeed;
// Adjust FOV
if (kb[Key.PageUp])
{
FOV += fovSpeed;
}
if (kb[Key.PageDown])
{
FOV = Math.Max(FOV - fovSpeed, 0f);
}
// Let the camera point in a direction determined by the position of the click:
if (m.IsButtonDown(MouseButton.Right) && !lm.IsButtonDown(MouseButton.Right) && 0 <= md.X && md.X < 512)
{
Ray r = getDirection(md.X, md.Y);
// Call the setter:
this.Direction = r.direction;
}
else if (m.IsButtonDown(MouseButton.Left) && lm.IsButtonDown(MouseButton.Left))
{
// Rotate proportional to the movement of the mouse
int dx = m.X - lm.X, dy = m.Y - lm.Y;
// Rotate up, down absolute
dirY = Vector3.UnitY;
Rotation = Quaternion.FromAxisAngle(dirY, mouseRotateSpeed * dx) * Rotation;
// Rotate left, right relative to the current rotation
dirX = Rotation * Vector3.UnitX;
Rotation = Quaternion.FromAxisAngle(dirX, mouseRotateSpeed * dy) * Rotation;
}
// Set the state to the last state so we can compare with this state the next time:
lkb = kb;
lm = m;
}
