grtrackmap.h

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/***************************************************************************

    file                 : grtrackmap.h
    created              : Fri Aug 29 00:57:00 CEST 2003
    copyright            : (C) 2003 by Bernhard Wymann
    email                : berniw@bluewin.ch
    version              : $Id$

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

/*
    This class displays an overview map of the track, such that you can see the
    upcoming track layout. Your car is displayed as a dot.
    To get reasonable efficiency, the track is first rendered into a texture. During the
    game just the texture needs to be redrawn.
*/

#ifndef _GRTRACKMAP_H_
#define _GRTRACKMAP_H_

#include <car.h>
#include <raceman.h>
#include <GL/gl.h>
#include <GL/glut.h>
#include <GL/glu.h>

#ifndef WIN32
#include <unistd.h>
#endif
#include <math.h>
#include <glfeatures.h>

#define TRACK_MAP_NONE                          (1<<0)
#define TRACK_MAP_NORMAL                        (1<<1)
#define TRACK_MAP_NORMAL_WITH_OPPONENTS         (1<<2)
#define TRACK_MAP_PAN                           (1<<3)
#define TRACK_MAP_PAN_WITH_OPPONENTS            (1<<4)
#define TRACK_MAP_PAN_ALIGNED                   (1<<5)
#define TRACK_MAP_PAN_ALIGNED_WITH_OPPONENTS    (1<<6)

// Must equal the biggest TRACK_MAP_*
#define TRACK_MAP_MASK (1<<6)

// Pointer to the track data found in grscene.cpp.
#include <track.h>
extern tTrack *grTrack;

// Include to access window dimensions.
#include "grmain.h"

class cGrTrackMap
{
    public:
        // The constructor creates a texture of the track data, such that the track
        // layout can be displayed efficiently. Additional data gets initialized.
        cGrTrackMap();

        // Release the texture and data.
        ~cGrTrackMap();

        // Walk trough the different available display modes.
        void selectTrackMap();

        // Draw the track map according to the display mode.
        void display(
            tCarElt *currentCar,
            tSituation *situation,
            int Winx,
            int Winy,
            int Winw,
            int Winh
        );

        // Set the view mode 
        void setViewMode(int vm);
        
        // Get The view mode
        int getViewMode();

        // Get the default view mode
        int getDefaultViewMode();

    private:
        // The resolution in [m] to analyse turns.
        static const float RESOLUTION;

        // Minimum and Maximum line width in pixels to draw the track.
        static const float MINLINEWIDTH;
        static const float MAXLINEWIDTH;

        // Some data needs just one initalization, after first initialization this is set to true.
        static bool isinitalized;

        // Texture object
        static GLuint mapTexture;

        // The car "dot" display list.
        static GLuint cardot;

        // Track bounding box properties, lower left, upper right corner, width and height.
        static float track_min_x;
        static float track_max_x;
        static float track_min_y;
        static float track_max_y;
        static float track_width;
        static float track_height;

        // The ratio of width and height to MAX(width, height).
        static float track_x_ratio;
        static float track_y_ratio;

        // Position and size of the map (relative to top left).
        static int map_x;
        static int map_y;
        static int map_size;

        // Scaling factor from meters to texels.
        static float ratio;

        // Color of the cars "dots".
        static GLfloat currentCarColor[4];
        static GLfloat aheadCarColor[4];
        static GLfloat behindCarColor[4];

        // Holds the current view (look at TRACK_MAP_*).
        int viewmode;

        // Draw the track full visible and static.
        void drawTrackNormal(int x, int y);

        // Draw the track in the panning mode.
        void drawTrackPanning(int Winx, int Winy, int Winw, int Winh, tCarElt *currentCar, tSituation *situation);

        // Draw the track in the panning aligned mode.
        void drawTrackPanningAligned(int Winx, int Winy, int Winw, int Winh, tCarElt *currentCar, tSituation *s);

        // Draw the dot of the car.
        void drawCar(tCarElt *currentCar, GLfloat* color, int x, int y);

        // Draw all opponents of the current car.
        void drawCars(tCarElt *currentCar, tSituation *s, int x, int y);

        // Setus up colors.
        void initColors();

        void checkAndSetMinimum(float &currentmin, float &value);
        void checkAndSetMaximum(float &currentmax, float &value);
};

#endif // _GRTRACKMAP_H_