//-----------------------------------------------------------------------------
// Computes the closest point to vecTarget no farther than flMaxDist from vecStart
//-----------------------------------------------------------------------------
void ComputeClosestPoint2D(const Vector2D& vecStart, float flMaxDist, const Vector2D& vecTarget, Vector2D *pResult)
{
Vector2D vecDelta;
Vector2DSubtract(vecTarget, vecStart, vecDelta);
float flDistSqr = vecDelta.LengthSqr();
if (flDistSqr <= flMaxDist * flMaxDist) {
*pResult = vecTarget;
}
else {
vecDelta /= sqrt(flDistSqr);
Vector2DMA(vecStart, flMaxDist, vecDelta, *pResult);
}
}
void CWeaponIFMSteadyCam::ComputeViewOffset()
{
// Update 2D spring
if ( !m_bInSpringMode )
{
m_vecViewOffset = m_vecActualViewOffset;
return;
}
Vector2D dir;
Vector2DSubtract( m_vecViewOffset.AsVector2D(), m_vecActualViewOffset.AsVector2D(), dir );
float flDist = Vector2DNormalize( dir );
Vector2D vecForce;
Vector2DMultiply( dir, -flDist * ifm_steadycam_2dspringconstant.GetFloat(), vecForce );
Vector2DMA( vecForce, -ifm_steadycam_2ddragconstant.GetFloat(), m_vec2DVelocity.AsVector2D(), vecForce );
Vector2DMA( m_vecViewOffset.AsVector2D(), gpGlobals->frametime, m_vec2DVelocity.AsVector2D(), m_vecViewOffset.AsVector2D() );
Vector2DMA( m_vec2DVelocity.AsVector2D(), gpGlobals->frametime, vecForce, m_vec2DVelocity.AsVector2D() );
}
Vector2D Vector2D::operator-(const Vector2D& v) const
{
Vector2D res;
Vector2DSubtract(*this, v, res);
return res;
}
