71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
//
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// SuperTuxKart - a fun racing game with go-kart
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// Copyright (C) 2009-2015 Joerg Henrichs
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 3
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// of the License, or (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, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include "tracks/check_sphere.hpp"
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#include <string>
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#include <stdio.h>
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#include "io/xml_node.hpp"
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#include "modes/world.hpp"
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#include "race/race_manager.hpp"
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/** Constructor for a checksphere.
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* \param check_manager Pointer to the check manager, which is needed when
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* resetting e.g. new lap counters.
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* \param node XML node containing the parameters for this checkline.
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*/
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CheckSphere::CheckSphere(const XMLNode &node, unsigned int index)
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: CheckStructure(node, index)
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{
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m_radius2 = 1;
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node.get("radius", &m_radius2);
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m_radius2 *= m_radius2;
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node.get("xyz", &m_center_point);
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unsigned int num_karts = race_manager->getNumberOfKarts();
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m_is_inside.resize(num_karts);
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m_distance2.resize(num_karts);
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for(unsigned int i=0; i< num_karts; i++)
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{
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m_is_inside[i] = false;
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}
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} // CheckSphere
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// ----------------------------------------------------------------------------
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/** True if going from old_pos to new_pos enters or leaves this sphere. This
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* function is called from update (of the checkline structure). It also
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* updates the flag about which karts are inside
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* \param old_pos Position in previous frame.
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* \param new_pos Position in current frame.
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* \param kart_id Index of the kart, can be used to store kart specific
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* additional data.
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*/
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bool CheckSphere::isTriggered(const Vec3 &old_pos, const Vec3 &new_pos,
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unsigned int kart_id)
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{
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float old_dist2 = (old_pos-m_center_point).length2();
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float new_dist2 = (new_pos-m_center_point).length2();
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m_is_inside[kart_id] = new_dist2<m_radius2;
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m_distance2[kart_id] = new_dist2;
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// Trigger if the kart goes from outside (or border) to inside,
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// or inside ro outside (or border).
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return (old_dist2>=m_radius2 && new_dist2 < m_radius2) ||
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(old_dist2< m_radius2 && new_dist2 >=m_radius2);
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} // isTriggered
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