/* ** Command & Conquer Generals(tm) ** Copyright 2025 Electronic Arts Inc. ** ** This program is free software: you can redistribute it and/or modify ** it under the terms of the GNU General Public License as published by ** the Free Software Foundation, either version 3 of the License, or ** (at your option) any later version. ** ** This program is distributed in the hope that it will be useful, ** but WITHOUT ANY WARRANTY; without even the implied warranty of ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** GNU General Public License for more details. ** ** You should have received a copy of the GNU General Public License ** along with this program. If not, see . */ //////////////////////////////////////////////////////////////////////////////// // // // (c) 2001-2003 Electronic Arts Inc. // // // //////////////////////////////////////////////////////////////////////////////// // DiscreteCircle.h /////////////////////////////////////////////////////////////////////////////// // John K McDonald, Jr. // September 2002 // DO NOT DISTRIBUTE #pragma once #ifndef __DISCRETECIRCLE_H__ #define __DISCRETECIRCLE_H__ //------------------------------------------------------------------------------------------------- /** One horizontal line of the circle we are going to generate, the points drawn should be from (xStart, yPos)-(xEnd, yPos), inclusive. */ struct HorzLine { Int yPos; Int xStart; Int xEnd; }; // Vector and Iterators for the HorzLine struct. typedef std::vector VecHorzLine; typedef VecHorzLine::iterator VecHorzLineIt; //------------------------------------------------------------------------------------------------- // Useful if you'd like to not have to deal with the logic of drawing the circle. typedef void (*ScanlineDrawFunc)(Int xStart, Int xEnd, Int yPos, void *otherParms); /** DiscreteCircle generates a circle centered at xCenter, yCenter, including radius. It generates horizontal segments for the top half of the circle only, so they need to be duplicated for the bottom half. */ class DiscreteCircle { VecHorzLine m_edges; // Should be HorzLines Int m_yPos; // Used to know when to draw the bottom scanline Int m_yPosDoubled; // Used to draw the bottom half of the circle. public: DiscreteCircle(Int xCenter, Int yCenter, Int radius); __inline const VecHorzLine &getEdges(void) const { return m_edges; } __inline Int getEdgeCount(void) const { return m_edges.size(); } void drawCircle(ScanlineDrawFunc functionToDrawWith, void *parmToPass); protected: void generateEdgePairs(Int xCenter, Int yCenter, Int radius); void removeDuplicates(); }; #endif /* __DISCRETECIRCLE_H__ */