144 lines
3.4 KiB
C++
144 lines
3.4 KiB
C++
// * This file is part of the COLOBOT source code
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// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
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// *
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// * This program is free software: you can redistribute it and/or modify
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// * it under the terms of the GNU General Public License as published by
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// * the Free Software Foundation, either version 3 of the License, or
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// * (at your option) any later version.
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// *
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// * This program is distributed in the hope that it will be useful,
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// * but WITHOUT ANY WARRANTY; without even the implied warranty of
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// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// * GNU General Public License for more details.
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// *
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// * You should have received a copy of the GNU General Public License
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// * along with this program. If not, see http://www.gnu.org/licenses/.
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// taskadvance.cpp
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#include "object/task/taskadvance.h"
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#include "math/geometry.h"
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#include "physics/physics.h"
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// Object's constructor.
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CTaskAdvance::CTaskAdvance(CInstanceManager* iMan, CObject* object)
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: CTask(iMan, object)
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{
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}
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// Object's destructor.
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CTaskAdvance::~CTaskAdvance()
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{
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}
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// Management of an event.
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bool CTaskAdvance::EventProcess(const Event &event)
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{
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if ( m_engine->GetPause() ) return true;
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if ( event.type != EVENT_FRAME ) return true;
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m_fixTime += event.rTime;
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// Momentarily stationary object (ant on the back)?
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if ( m_object->GetFixed() )
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{
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m_physics->SetMotorSpeedX(0.0f); // stops the advance
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m_physics->SetMotorSpeedZ(0.0f); // stops the rotation
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m_bError = true;
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return true;
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}
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m_timeLimit -= event.rTime;
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return true;
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}
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// Assigns the goal was achieved.
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Error CTaskAdvance::Start(float length)
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{
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m_direction = (length>=0.0f)?1.0f:-1.0f;
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m_totalLength = fabs(length);
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m_advanceLength = m_physics->GetLinLength(length);
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m_startPos = m_object->GetPosition(0);
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m_lastDist = 0.0f;
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m_fixTime = 0.0f;
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m_timeLimit = m_physics->GetLinTimeLength(m_totalLength, m_direction)*3.0f;
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if ( m_timeLimit < 2.0f ) m_timeLimit = 2.0f;
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m_physics->SetMotorSpeedX(m_direction*1.0f); // forward/backward
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m_physics->SetMotorSpeedY(0.0f);
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m_physics->SetMotorSpeedZ(0.0f);
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m_bError = false;
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return ERR_OK;
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}
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// Indicates whether the action is finished.
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Error CTaskAdvance::IsEnded()
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{
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Math::Vector pos;
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float length;
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if ( m_engine->GetPause() ) return ERR_CONTINUE;
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if ( m_bError )
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{
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return ERR_STOP;
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}
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if ( m_timeLimit < 0.0f )
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{
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m_physics->SetMotorSpeedX(0.0f);
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return ERR_MOVE_IMPOSSIBLE;
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}
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pos = m_object->GetPosition(0);
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length = Math::DistanceProjected(pos, m_startPos);
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if ( length > m_lastDist ) // forward?
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{
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m_fixTime = 0.0f;
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}
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else // still stands?
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{
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if ( m_fixTime > 1.0f ) // for more than a second?
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{
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m_physics->SetMotorSpeedX(0.0f);
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return ERR_MOVE_IMPOSSIBLE;
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}
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}
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m_lastDist = length;
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if ( length >= m_totalLength )
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{
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m_physics->SetMotorSpeedX(0.0f);
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m_physics->SetLinMotionX(MO_CURSPEED, 0.0f);
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if ( length != 0.0f )
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{
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pos = m_startPos+((pos-m_startPos)*m_totalLength/length);
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m_object->SetPosition(0, pos);
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}
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return ERR_STOP;
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}
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if ( length >= m_advanceLength )
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{
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m_physics->SetMotorSpeedX(m_direction*0.1f);
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}
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return ERR_CONTINUE;
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}
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