bced8cdb9f
patch). git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/uni@14605 178a84e3-b1eb-0310-8ba1-8eac791a3b58
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
//
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// SuperTuxKart - a fun racing game with go-kart
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// Copyright (C) 2009-2013 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/bezier_curve.hpp"
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#include "io/xml_node.hpp"
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BezierCurve::BezierCurve(const XMLNode &node)
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{
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for(unsigned int i=0; i<node.getNumNodes(); i++)
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{
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const XMLNode *p = node.getNode(i);
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BezierData b;
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p->get("c", &b.m_control_point);
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p->get("h1", &b.m_handle1);
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p->get("h2", &b.m_handle2);
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m_all_data.push_back(b);
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} // for i<node.getNumNodes()
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} // BezierCurve
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// ----------------------------------------------------------------------------
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Vec3 BezierCurve::getXYZ(float t) const
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{
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unsigned int i=int(t); // FIXME: have to figure out which point we want here
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if(i>=(unsigned int)m_all_data.size()-1)
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return m_all_data[i].m_control_point;
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const BezierData &p0 = m_all_data[i];
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const BezierData &p1 = m_all_data[i+1];
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Vec3 c = 3*(p0.m_handle2-p0.m_control_point);
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Vec3 b = 3*(p1.m_handle1-p0.m_handle2)-c;
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Vec3 a = p1.m_control_point - p0.m_control_point - c - b;
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t = t-i;
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Vec3 r = a*t*t*t + b*t*t + c*t + p0.m_control_point;
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return r;
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} // getXYZ
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// ----------------------------------------------------------------------------
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Vec3 BezierCurve::getHPR(float t) const
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{
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// FIXME: not yet implemented
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Vec3 hpr(0,0,0);
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return hpr;
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} // getHPR
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