protected void UpdateVelocity(double fElapsedTime)
{
XMVector vMouseDelta = m_vMouseDelta;
XMVector vRotVelocity = vMouseDelta * m_fRotationScaler;
m_vRotVelocity = vRotVelocity;
XMVector vKeyboardDirection = m_vKeyboardDirection;
XMVector vAccel = vKeyboardDirection;
// Normalize vector so if moving 2 dirs (left & forward),
// the camera doesn't move faster than if moving in 1 dir
vAccel = XMVector3.Normalize(vAccel);
// Scale the acceleration vector
vAccel *= m_fMoveScaler;
if (m_bMovementDrag)
{
// Is there any acceleration this frame?
if (XMVector3.LengthSquare(vAccel).X > 0)
{
// If so, then this means the user has pressed a movement key
// so change the velocity immediately to acceleration
// upon keyboard input. This isn't normal physics
// but it will give a quick response to keyboard input
m_vVelocity = vAccel;
m_fDragTimer = m_fTotalDragTimeToZero;
m_vVelocityDrag = vAccel / (float)m_fDragTimer;
}
else
{
// If no key being pressed, then slowly decrease velocity to 0
if (m_fDragTimer > 0)
{
// Drag until timer is <= 0
XMVector vVelocity = m_vVelocity;
XMVector vVelocityDrag = m_vVelocityDrag;
vVelocity -= vVelocityDrag * (float)fElapsedTime;
m_vVelocity = vVelocity;
m_fDragTimer -= fElapsedTime;
}
else
{
// Zero velocity
m_vVelocity = XMVector.Zero;
}
}
}
else
{
// No drag, so immediately change the velocity
m_vVelocity = vAccel;
}
}
public void CreateWindowSizeDependentResources()
{
const float adaptive_scale_in_pixels = 15.0f;
this.m_tess_edge_len_scale = new XMFloat2(
this.deviceResources.BackBufferWidth * 0.5f / adaptive_scale_in_pixels,
this.deviceResources.BackBufferHeight * 0.5f / adaptive_scale_in_pixels);
}
public SimpleVertex(XMFloat3 pos, XMFloat2 tex)
{
this.Pos = pos;
this.Tex = tex;
}
public BasicVertex(XMFloat3 position, XMFloat3 normal, XMFloat2 textureCoordinates)
{
this.Position = position;
this.Normal = normal;
this.TextureCoordinates = textureCoordinates;
}
