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Turmite.cpp
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Turmite.cpp
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#include <assert.h>
#include "Turmite.h"
#include "World.h"
Turmite::Turmite( const int inPosX, const int inPosY, const State inState, const eOrientation inOrientation, World* inWorld, StateTransitionTable* inStateTransitionTable )
: m_posX(inPosX)
, m_posY(inPosY)
, m_state(inState)
, m_orientation(inOrientation)
, m_currentStep(0)
, m_world(inWorld)
, m_stateTransitionTable(inStateTransitionTable)
{
assert(m_world);
assert(m_stateTransitionTable);
}
Turmite::~Turmite(void)
{
}
unsigned int Turmite::Step()
{
assert(m_world);
assert(m_stateTransitionTable);
if ( m_world && m_stateTransitionTable )
{
// Current colour index
ColourIndex colourIndex = m_world->GetColourIndex( m_posX, m_posY );
// Get the operation to perform
const Operation& operation = m_stateTransitionTable->GetOperation( m_state, colourIndex );
if ( operation.IsValid() )
{
// Change orientation
Rotate( operation.turn );
// Change the colour on the grid
m_world->SetColourIndex( operation.writeColour, m_posX, m_posY );
// Move forward following the new orientation
m_world->MoveForward( m_orientation, m_posX, m_posY );
// Change current state
m_state = operation.nextState;
}
}
return ++m_currentStep;
}
void Turmite::Rotate( const eMovement inMovement )
{
int rot(0);
switch( inMovement )
{
case eRight: rot = 1; break;
case eLeft: rot = 3; break;
case eUturn: rot = 2; break;
}
m_orientation = static_cast<eOrientation>( (static_cast<int>(m_orientation) + rot) % eOrientation_Max );
}