void Pellet::Update()
{
if (!HasImpacted())
{
//calculate the steering force
Vector2D DesiredVelocity = Vec2DNormalize(m_vTarget - Pos()) * MaxSpeed();
Vector2D sf = DesiredVelocity - Velocity();
//update the position
Vector2D accel = sf / m_dMass;
m_vVelocity += accel;
//make sure vehicle does not exceed maximum velocity
m_vVelocity.Truncate(m_dMaxSpeed);
//update the position
m_vPosition += m_vVelocity;
TestForImpact();
}
else if (!isVisibleToPlayer())
{
m_bDead = true;
}
}
//------------------------------ Update ---------------------------------------
//-----------------------------------------------------------------------------
void Rocket::Update()
{
if (!m_bImpacted)
{
m_vVelocity = MaxSpeed() * Heading();
//make sure vehicle does not exceed maximum velocity
m_vVelocity.Truncate(m_dMaxSpeed);
//update the position
m_vPosition += m_vVelocity;
TestForImpact();
}
else
{
m_dCurrentBlastRadius += script->GetDouble("Rocket_ExplosionDecayRate");
//when the rendered blast circle becomes equal in size to the blast radius
//the rocket can be removed from the game
if (m_dCurrentBlastRadius > m_dBlastRadius)
{
m_bDead = true;
}
}
}
//----------------------UpdateShipFromAction---------------------------
//
// this is the main workhorse. It reads the ships decoded string of
// actions and performs them, updating the lander accordingly. It also
// checks for impact and updates the fitness score.
//
//----------------------------------------------------------------------
bool CLander::UpdateShip()
{
//just return if ship has crashed or landed
if (m_bCheckedIfLanded)
{
return false;
}
//this will be the current action
action_type action;
//check that we still have an action to perform. If not then
//just let the lander drift til it hits the ground
if (m_cTick >= m_vecActions.size())
{
action = non;
}
else
{
action = m_vecActions[m_cTick++];
}
//switch the jet graphic off
m_bJetOn = false;
switch (action)
{
case rotate_left:
m_dRotation -= ROTATION_PER_TICK;
if (m_dRotation < -PI)
{
m_dRotation += TWO_PI;
}
break;
case rotate_right:
m_dRotation += ROTATION_PER_TICK;
if (m_dRotation > TWO_PI)
{
m_dRotation -= TWO_PI;
}
break;
case thrust:
{
//the lander's acceleration per tick calculated from
//the force the thruster exerts and the lander's mass
double ShipAcceleration = THRUST_PER_TICK/m_dMass;
//resolve the acceleration vector into its x, y components
//and add to the lander's velocity vector
m_vVelocity.x += ShipAcceleration * sin(m_dRotation);
m_vVelocity.y += ShipAcceleration * cos(m_dRotation);
//switch the jet graphic on
m_bJetOn = true;
}
break;
case non:
break;
}//end switch
//now add in the gravity vector
m_vVelocity.y += GRAVITY_PER_TICK;
//update the lander's position
m_vPos += m_vVelocity;
//bounds checking
if (m_vPos.x > WINDOW_WIDTH)
{
m_vPos.x = 0;
}
if (m_vPos.x < 0)
{
m_vPos.x = WINDOW_WIDTH;
}
//now we check to see if the lander has crashed or landed
//create a copy of the landers verts before we transform them
m_vecShipVBTrans = m_vecShipVB;
//transform the vertices
WorldTransform(m_vecShipVBTrans);
//if we are lower than the ground then we have finished this run
if (TestForImpact(m_vecShipVBTrans))
{
//check if user has landed ship
if (!m_bCheckedIfLanded)
{
//calculate fitness if we haven't already
if (!m_dFitness)
{
CalculateFitness();
m_bCheckedIfLanded = true;
}
return false;
}
}
return true;
}