I have found that I have a large set of interesting and maybe sometimes useful applications. I have been programming for 14 years, I started from Pascal and tried Delphi, C++, Java, Perl, Clipper, FoxPro, Lua , JavaScript, C#, Octave, Python, Scala, R, F# (and may be something else that I currently do not remember). Through the years I created set of programs that may be interesting for someone else. These programs may look simple for experts, but I hope that they can be useful for beginners. So, I would like to add a new rubric to my blog, called “Apps”, where I will try to collect and share as much as I can find)

This post is about second version of the small maze game that called SuperSDG2, which was created in 2005 using C++, OpenGL(glut32) and a bit of passion. In the game, you are a lonely red ball in the large terrible maze. Your only wish is to find an exit from the random-generated maze. It is strange, but exit is a  yellow ball ;). The source code and binaries of this application are available on GitHub.

Control keys:

• Left/Right/Up/Down – move actions
• A/S – rotate camera
• Z/X – up/down camera
• R – reset camera position
• Esc/Q – exit

Feel free to download binaries, play and modify the source code.

/********************************
* SuperSDG v2.2 release
* Copyright (c) 2002-2008 Ravent
* All rights reserved
*********************************/
#pragma comment (lib,"glut32.lib")
#pragma comment (lib,"glaux.lib")

#include "glaux.h"
#include "glut.h"
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include <time.h>

const int sMax=6, m=40, mm=m+1, direction_parts=36;
int cur_direction=0;
double distance=4.;

unsigned textureId = -1, texFloor = -1;
AUX_RGBImageRec *localTexture = NULL, *localFloor = NULL;
int glWin,pathLen,myLen=0;

struct Tpos
{char x,y;};
struct Player
{
    int x,y,z;
    int dx,dz;
    bool isGo;
}player,ex;

struct Maps
{int x,z;} map;

char data[m+2][m+2], cp[m+2][m+2];

float	lightAmb [] = { 0.03, 0.03, 0.03 };
float	lightDif [] = { 0.95, 0.95, 0.95 };
float	lightPos [] = { (int)m/2,  7,  (int)m/2 };

void display(void);
void halt(bool f=false);

void drawFloor(GLfloat x1, GLfloat x2, GLfloat z1, GLfloat z2, unsigned texture=texFloor)
{
    glBindTexture ( GL_TEXTURE_2D, texture );
    glBegin(GL_POLYGON);
        glNormal3f( 0.0, 1.0, 0.0);
        glTexCoord2f(0,0);
        glVertex3f( x1, 0, z2 );
        glTexCoord2f(1,0);
        glVertex3f( x2, 0, z2 );
        glTexCoord2f(1,1);
        glVertex3f( x2, 0, z1 );
        glTexCoord2f(0,1);
        glVertex3f( x1, 0, z1 );
    glEnd();

}

void drawBox (GLint j, GLint i, unsigned texture=textureId)
{
    GLfloat x1=i, x2=i+1, y1=0, y2=1, z1=j, z2=j+1;
    glBindTexture ( GL_TEXTURE_2D, texture );

    if ((j==map.z+1)||(data[j-1][i]!='x'))
    {
    glBegin(GL_POLYGON); // Back
        glNormal3f( 0.0, 0.0, -1.0);
        glTexCoord2f(0,0);
        glVertex3f( x2, y1, z1 );
        glTexCoord2f(1,0);
        glVertex3f( x1, y1, z1 );
        glTexCoord2f(1,1);
        glVertex3f( x1, y2, z1 );
        glTexCoord2f(0,1);
        glVertex3f( x2, y2, z1 );
    glEnd();
    }
    if ((j==map.z-1)||(data[j+1][i]!='x'))
    {
    glBegin(GL_POLYGON); // Front
        glNormal3f( 0.0, 0.0, 1.0);
        glTexCoord2f(0,0);
        glVertex3f( x1, y1, z2 );
        glTexCoord2f(1,0);
        glVertex3f( x2, y1, z2 );
        glTexCoord2f(1,1);
        glVertex3f( x2, y2, z2 );
        glTexCoord2f(0,1);
        glVertex3f( x1, y2, z2 );
    glEnd();
    }
    if ((i>0)&&(data[j][i-1]!='x'))
    {
    glBegin(GL_POLYGON); // Left
        glNormal3f( -1.0, 0.0, 0.0);
        glTexCoord2f(0,0);
        glVertex3f( x1, y1, z1 );
        glTexCoord2f(1,0);
        glVertex3f( x1, y1, z2 );
        glTexCoord2f(1,1);
        glVertex3f( x1, y2, z2 );
        glTexCoord2f(0,1);
        glVertex3f( x1, y2, z1 );
    glEnd();
    }
    if ((i<map.x)&&(data[j][i+1]!='x'))
    {
    glBegin(GL_POLYGON); // Right
        glNormal3f( 1.0, 0.0, 0.0);
        glTexCoord2f(0,0);
        glVertex3f( x2, y1, z2 );
        glTexCoord2f(1,0);
        glVertex3f( x2, y1, z1 );
        glTexCoord2f(1,1);
        glVertex3f( x2, y2, z1 );
        glTexCoord2f(0,1);
        glVertex3f( x2, y2, z2 );
    glEnd();
    }
    glBegin(GL_POLYGON); // Top
        glNormal3f( 0.0, 1.0, 0.0);
        glTexCoord2f(0,0);
        glVertex3f( x1, y2, z2 );
        glTexCoord2f(1,0);
        glVertex3f( x2, y2, z2 );
        glTexCoord2f(1,1);
        glVertex3f( x2, y2, z1 );
        glTexCoord2f(0,1);
        glVertex3f( x1, y2, z1 );
    glEnd();
}

void animate()
{
    if ((player.x == ex.x)&&(player.z==ex.z))
    {
        halt(true);
    };
    if (player.isGo==true)
    {
        if (player.dx>0)	player.dx+=1; else
        if (player.dz>0)	player.dz+=1; else
        if (player.dx<0)	player.dx-=1; else
        if (player.dz<0)	player.dz-=1;
        if ((player.dx>=sMax)||(player.dz>=sMax))
        {
            player.isGo=false;
            if (player.dx>0)	player.x+=1;
            if (player.dz>0)	player.z+=1;
            player.dx=0; player.dz=0;
        }else
        if ((player.dx<=-sMax)||(player.dz<=-sMax))
        {
            player.isGo=false;
            if (player.dx<0)	player.x-=1;
            if (player.dz<0)	player.z-=1;
            player.dx=0; player.dz=0;
        }
    }
    glutPostRedisplay();
}

void init()
{
    glClearColor( 0.0, 0.0, 0.0, 1.0 );
    glEnable( GL_DEPTH_TEST );
    glEnable( GL_TEXTURE_2D );
    glEnable( GL_CULL_FACE );
    glPixelStorei ( GL_PACK_ALIGNMENT, 1 );
    glPixelStorei ( GL_UNPACK_ALIGNMENT, 1 );
    glShadeModel (GL_SMOOTH);
    glLightfv    ( GL_LIGHT0, GL_AMBIENT,  lightAmb );
    glLightfv    ( GL_LIGHT0, GL_DIFFUSE,  lightDif );
    //glLightfv    ( GL_LIGHT0, GL_POSITION, lightPos );
    glEnable ( GL_LIGHT0 );
    glEnable ( GL_LIGHTING );
    player.dx=0; player.dz=0; player.isGo=false;
    glEnable(GL_COLOR_MATERIAL);
}

void display()
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();
    gluLookAt(player.x+(1.0*player.dx/sMax)+0.5f+3*cos(M_PI_2+cur_direction/double(direction_parts)*2.*M_PI),player.y+distance,player.z+(1.0*player.dz/sMax)+0.5f+3*sin(M_PI_2+cur_direction/double(direction_parts)*2.*M_PI),
              player.x+(1.0*player.dx/sMax)+0.5f,player.y+0.5f,player.z+(1.0*player.dz/sMax)+0.5f,
              0,1,0);

    for (int i=0;i<map.x;i++)
        for (int j=0;j<map.z;j++)
            if (data[j][i] == 'x')
            {
                drawBox(j,i);
            } else {
                drawFloor(i,i+1,j,j+1);
            }

    glPushMatrix();
    glTranslatef ( player.x+(1.0*player.dx/sMax)+0.5f, player.y+0.5f, player.z+(1.0*player.dz/sMax)+0.5f);
    glColor3d(1,0,0);
    glutSolidSphere(0.5,100,100);
    glColor3d(1,1,1);
    glPopMatrix(); 

    glPushMatrix();
    glTranslatef ( ex.x +0.5f, ex.y+0.5f, ex.z+0.5f);
    glColor4d(1,1,0.,0.4);
    glutSolidSphere(0.5,100,100);
    glColor3d(1,1,1);
    glPopMatrix(); 

    glutSwapBuffers();
}

void reshape ( int w, int h )
{
    glViewport( 0, 0, (GLsizei)w, (GLsizei)h);
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    gluPerspective( 60.0, (GLfloat)w/(GLfloat)h, 1.0, 60.0);

    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();
    gluLookAt(0,0,25,0,0,0,0,1,0);
}

void key( unsigned char key, int x, int y)
{
    if ( key=='q' || key=='Q' || key == 27) halt(false);
    if ( key=='a' || key=='A' ) { cur_direction--; if (cur_direction<0) cur_direction+=direction_parts;}
    if ( key=='s' || key=='S' ) { cur_direction++; if (cur_direction==direction_parts) cur_direction=0;}
    if ((key=='z' || key=='Z') && (distance<58.) ) distance+=0.25;
    if ((key=='x' || key=='X') && (distance>3.) ) distance-=0.25;
    if ( key=='r' || key=='R' ) { cur_direction=0; distance=4.;}
}

const int move[4][2]={{-1,0},{0,-1},{1,0},{0,1}};
const int move_key[4] = {GLUT_KEY_UP, GLUT_KEY_LEFT, GLUT_KEY_DOWN, GLUT_KEY_RIGHT };
bool good_move(int z, int x){
    return (0<=z && 0<=x && z<map.z && x<map.x && data[z][x]!='x');
}

void keys( int key, int x, int y)
{
    if (player.isGo) return;
    int dir=int(((direction_parts-cur_direction-1)/double(direction_parts))*4.+0.5);
    for (int i=0; i<4; i++)
        if ( key == move_key[i] ) {
            int newz=player.z+move[(dir+i)%4][0];
            int newx=player.x+move[(dir+i)%4][1];
            if (good_move(newz,newx)) {
                player.isGo=true;
                player.dz+=move[(dir+i)%4][0];
                player.dx+=move[(dir+i)%4][1];
                myLen++;
            }
        }
}

void genMap(void);

int main (int argc, char** argv)
{
    genMap();
    glutInit(&argc,argv);
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
    glutInitWindowSize(1024,768);

    glWin = glutCreateWindow("SuperSDG 2");
    init();

    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutKeyboardFunc(key);
    glutSpecialFunc(keys);
    glutIdleFunc(animate);

    localTexture = auxDIBImageLoad(L"1.bmp");
    glGenTextures (1,&textureId);
    glBindTexture (GL_TEXTURE_2D,textureId);
    glPixelStorei (GL_UNPACK_ALIGNMENT,1);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,GL_REPEAT);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,GL_REPEAT);
    gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGB, localTexture->sizeX, localTexture->sizeY, GL_RGB, GL_UNSIGNED_BYTE, localTexture->data);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    localFloor = auxDIBImageLoad(L"2.bmp");
    glGenTextures (1,&texFloor);
    glBindTexture (GL_TEXTURE_2D,texFloor);
    glPixelStorei (GL_UNPACK_ALIGNMENT,1);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,GL_REPEAT);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,GL_REPEAT);
    gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGB, localFloor->sizeX, localFloor->sizeY, GL_RGB, GL_UNSIGNED_BYTE, localFloor->data);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    glutFullScreen();
    glutMainLoop();
    return 0;
}

int step(int y, int x)
{
    int res=0;
    if ((data[y][x]=='x')) res++;
    if ((y<mm)&&(data[y+1][x]=='x')) res++;
    if ((y>0 )&&(data[y-1][x]=='x')) res++;
    if ((x<mm)&&(data[y][x+1]=='x')) res++;
    if ((x>0 )&&(data[y][x-1]=='x')) res++;
    return res;
}

int stepC(int y, int x)
{
    int res=0;
    if ((cp[y][x]=='x')) res++;
    if ((y<mm)&&(cp[y+1][x]=='x')) res++;
    if ((y>0 )&&(cp[y-1][x]=='x')) res++;
    if ((x<mm)&&(cp[y][x+1]=='x')) res++;
    if ((x>0 )&&(cp[y][x-1]=='x')) res++;
    return res;
}

void DataToCp(void)
{
    for(int j=1;j<=mm;j++)
        for (int i=1;i<=mm;i++)
            cp[j][i]=data[j][i];
}

void fill (int y,int x,Tpos *v, int *l)
{
    int st=1,en=0;
    int G[mm*mm],Ll[mm*mm];
    G[0]=y*mm+x; Ll[0]=0;
    cp[y][x]='x';
    while (st!=en)
    {
        if ((G[en]%mm+1<mm)&&(cp[(int)G[en]/mm][G[en]%mm+1]=='.'))
        {
            G[st]=G[en]+1;
            Ll[st]=Ll[en]+1;
            cp[(int)G[st]/mm][G[st]%mm]='x';
            st++;
        }
        if ((G[en]%mm-1>0)&&(cp[(int)G[en]/mm][G[en]%mm-1]=='.'))
        {
            G[st]=G[en]-1;
            Ll[st]=Ll[en]+1;
            cp[(int)G[st]/mm][G[st]%mm]='x';
            st++;
        }
        if ((((int)G[en]/mm)+1<mm)&&(cp[((int)G[en]/mm)+1][G[en]%mm]=='.'))
        {
            G[st]=G[en]+mm;
            Ll[st]=Ll[en]+1;
            cp[(int)G[st]/mm][G[st]%mm]='x';
            st++;
        }
        if ((((int)G[en]/mm)-1>0)&&(cp[((int)G[en]/mm)-1][G[en]%mm]=='.'))
        {
            G[st]=G[en]-mm;
            Ll[st]=Ll[en]+1;
            cp[(int)G[st]/mm][G[st]%mm]='x';
            st++;
        }
        en++;
    }
    int rnd=rand()%5+1;
    (*v).x =(int) G[en-rnd] % mm;
    (*v).y =(int) G[en-rnd] / mm;
    *l=Ll[en-rnd];
}

bool isGood(Tpos a)
{
    DataToCp();
    int k=0,i,j,lt;
    Tpos temp;
    cp[a.y][a.x]='x';
    if ((step(a.y,a.x)>3)||(step(a.y+1,a.x)>3)||(step(a.y-1,a.x)>3)||(step(a.y,a.x+1)>3)||(step(a.y,a.x-1)>3))
        return false;
    for(j=1;j<=m;j++)
        for(i=1;i<=m;i++)
            if (cp[j][i]=='.')
            {
                if (k>0)
                    return false;
                fill(j,i,&temp,&lt);
                k++;
            }
    return true;
}

void genMap()
{
    int i,j;
    map.x=m+2; map.z=m+2;
    printf("Loading... Please Wait.\n");
    srand( (unsigned)time( NULL ) );
    for (j=0;j<map.z;j++)
        for (i=0;i<map.x;i++)
        {
            if ((i==0)||(j==0)||(i==map.x-1)||(j==map.z-1))
                data[j][i]='x';
                else
                data[j][i]='.';
        }

    int k=0;
    Tpos t;
    while (k<(int)m*m/2.5)
    {
        t.x = rand()%mm+1;
        t.y = rand()%mm+1;
        if ((data[t.y][t.x]=='.')&&(isGood(t)))
        {
            data[t.y][t.x]='x';
            k++;
        }
    }
    for (j=1;j<=m;j++)
        for (i=1;i<=m;i++)
            if ((data[j][i]=='x')&&(step(j,i)>3))
            {
                data[j][i]='.';
            }
    for (j=1;j<=m;j++)
        for (i=1;i<=m;i++)
            if ((data[j][i]=='.')&&(step(j,i)<2))
            {
                t.x = i; t.y=j;
                if (isGood(t))
                    data[j][i]='x';
            }

    Tpos ps[11]; k=0;
    while (k<=10)
    {
        t.x = rand()%mm+1;
        t.y = rand()%mm+1;
        if (data[t.y][t.x]=='.')
        {
            ps[k]=t;
            k++;
        }
    }
    k=rand()%11;
    player.x=ps[k].x;
    player.z=ps[k].y;
    DataToCp();
    fill(ps[k].y,ps[k].x,&t,&pathLen);
    ex.x=t.x;
    ex.z=t.y;

    printf("Loading complete.\n");
}

void halt(bool f)
{
        glutDestroyWindow(glWin);
        printf("-----------------------------------------------------\n");
        printf("#                    SuperSDG 2.2                   #\n");
        if (f==true)
        {
        printf("-----------------------------------------------------\n");
        printf("# The shortest path %d.                            #\n",pathLen);
        printf("# Your path %d.                                    #\n",myLen);
        printf("# Congratulate you passed the game.                 #\n");
            if (  1.2*pathLen >= myLen )
            {
                printf("-----------------------------------------------------\n");
                printf("#     YOU ONE OF THE BEST PLAYER OF THE WORLD.      #\n");
            }
        }
        printf("-----------------------------------------------------\n");
        printf("# Developers:                                       #\n");
        printf("#        Ravent     - programmer.                   #\n");
        printf("# Series found:                                     #\n");
        printf("#        Ravent     - Sergey Tihon                  #\n");
        printf("#        MasterZerg - Dima   Rudol                  #\n");
        printf("-----------------------------------------------------\n");
        printf("#          Copyright (c) Ravent 2002-2008.          #\n");
        printf("#               All rights reserved                 #\n");
        printf("-----------------------------------------------------\n");
        getch();
        exit(0);
}