/***************************************************************************************/ // // THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE // ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF // SUCH DAMAGE. // /***************************************************************************************/ #include #include #include #include #include #include int MX, MY; int MC; /* max color */ void init( void ) { int gd = 0, gm = VGALO; initgraph( &gd, &gm, getenv( "BGI" )); } void initPalette( void ) { int i; for( i = 0; i < 32; i++ ) setrgbpalette( i, i*8, 0, 252-i*8 ); for( i = 32; i < 64; i++ ) setrgbpalette( i, 252 - ( i - 32 ) * 8, ( i - 32 ) * 8, 0 ); setrgbpalette( 20, 177, 0, 144 ); setrgbpalette( 0, 15, 15, 15 ); } void scrollPalette( void ) { int i; char rgbpal[ 256 ][3]; for( i = 0; i < 32; i++ ) rgbpal[ i ][ 0 ] = i*8 , rgbpal[ i ][ 1 ] = 0 , rgbpal[ i ][ 2 ] = 252-i*8 ; for( i = 32; i < 64; i++ ) rgbpal[ i ][ 0 ] = 252 - ( i - 32 ) * 8, rgbpal[ i ][ 1 ] = ( i - 32 ) * 8, rgbpal[ i ][ 2 ] = 0 ; rgbpal[ 20 ][ 0 ] = 177, rgbpal[ 20 ][ 1 ] = 0, rgbpal[ 20 ][ 2 ] = 144 ; rgbpal[ 0 ][ 0 ] = 15, rgbpal[ 20 ][ 1 ] = 15, rgbpal[ 20 ][ 2 ] = 15 ; while( ! kbhit()) { char tmpr = rgbpal[0][0], tmpg = rgbpal[0][1], tmpb = rgbpal[0][2]; for( i = 0 ; i < 64; i++ ) setrgbpalette( i, rgbpal[i][0], rgbpal[ i ][ 2 ], rgbpal[ i ][ 2 ]); for( i = 0; i < 63; i++ ) rgbpal[ i ][ 0 ] = rgbpal[ i+1 ][ 0 ], rgbpal[ i ][ 1 ] = rgbpal[ i+1 ][ 1 ], rgbpal[ i ][ 2 ] = rgbpal[ i+1 ][ 2 ]; rgbpal[ 63 ][ 0 ] = tmpr, rgbpal[ 63 ][ 1 ] = tmpg, rgbpal[ 63 ][ 2 ] = tmpb; } } void saveScreen( void ) { int i; #define N 4 unsigned size = imagesize( 0, 0, MX, MY / N ); char far *p, *nm, nnm[ 80 ]; FILE *f; nm = ( char * )malloc( 80 ); tmpnam( nm ); p = ( char * )malloc( size ); if(( f = fopen( nm, "wb" )) == NULL ) printf( "Unable to open file\n" ), exit( -2 ); for( i = 0; i < N; i ++) { getimage( 0, i * MY / N + 1 , MX, ( i + 1 ) * MY / N, p ); fwrite(( void * )p, sizeof( char ), size, f ); } fclose( f ); free(( void * )p ); closegraph(); printf( "Enter new name for saved screen:" ); cscanf( "%79s", nnm ); if( rename( nm, nnm ) == -1 ) { printf( "\n\nRename failed: " ); printf( "%s", strerror( errno )); } else puts( "\n\nRename successful " ); puts( "ESC to continue" ); while( getch() != '\x1b' ) ; init(); } void restoreScreen( void ) { int i; unsigned size = imagesize( 0, 0, MX, MY / N ); char *p, nm[80]; FILE *f; closegraph(); printf( "Enter name for saved screen:" ); cscanf( "%79s", nm ); if(( f = fopen( nm, "rb" )) == NULL ) printf( "Unable to open file\n" ), exit( -2 ); p = ( char * )malloc( size ); init(); for( i = 0; i < N; i++ ) { fread( p, sizeof( char ), size, f ); putimage( 0, i * MY / 4 + 1 , p, COPY_PUT ); } fclose( f ); initPalette(); getch(); free( p ); #undef N } void mandel( int nx, int ny, /* screen size */ long double xmin, long double xmax, /* min and max on x axis */ long double ymin, long double ymax, /* min and max on y axis */ unsigned maxiter ) { short ix, iy; unsigned iter; long double cx, cy; long double x, y, x2, y2, temp; char s[80]; sprintf( s, "%8.7Lg L=%8.7Lg %8.7Lg L=%8.7Lg N <%d", xmin, xmax - xmin, ymin, ymax - ymin, maxiter ); setcolor( MC ); outtextxy( 100, ny - 10, s ); for( iy = 0; iy < ny - 12; iy ++ ) { if( kbhit()) return; cy = ymin + iy * ( ymax - ymin ) / ( ny - 1 ); setfillstyle( SOLID_FILL, MC ); bar( 1, ny - 10, 70, ny ); setcolor( 0 ); sprintf( s, "%8.7Lg", cy ); outtextxy( 1, ny - 8, s ); for( ix = 0; ix < nx; ix ++ ) { cx = xmin + ix * ( xmax - xmin ) / ( nx - 1 ); x = y = x2 = y2 = 0.0; iter = 0; while( iter < maxiter && ( x2 + y2 ) < 4.0 /* 10000.0 ??? */ ) { temp = x2 - y2 + cx; y = 2 * x * y + cy; x = temp; x2 = x * x; y2 = y * y; iter++; } putpixel( ix, iy, iter ); } } } void back( void ) { int i, j, k = 0; for( j = 6; j < MY-16; j += MY / 16 ) for( i = 8; i < MX-16; i += MX / 16 ) setfillstyle( SOLID_FILL, k++ ), bar( i, j, i - 3 + MX / 16 , j - 3 + MY / 16 ); } void main( void ) { int r, sizex, sizey, posx, posy; long double xm, xM, ym, yM, sizexr, sizeyr; char s[ 80 ]; init(); MX = getmaxx(), MY = getmaxy(), MC = getmaxcolor(), setcolor( MC ), rectangle( 0, 0, MX, MY ); setwritemode( 1 ); /* xor */ back(); initPalette(); xm = -2.0; xM = 0.5; ym = -1.25; yM = 1.25; posx = MX / 2; posy = MY / 2; sizex = ( int )( sizexr = MX / 10 ); sizey = ( int )( sizeyr = MY / 10 ); setcolor( MC ); rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); setwritemode( 1 ); do { switch( r = getch()) { case '4' : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); posx -= 5; rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; case '6' : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); posx += 5; rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; case '8' : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); posy -= 5; rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; case '2' : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); posy += 5; rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; case '+' : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); sizex = ( int )( sizexr *= 1.1 ); sizey = ( int )( sizeyr *= 1.1 ); rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; case '-' : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); sizex = ( int )( sizexr *= 0.909 ); sizey = ( int )( sizeyr *= 0.909 ); rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; case 13 : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); { long double tmp = xm; xm = xm + ( posx - sizex ) * ( xM - xm ) / ( MX ); xM = tmp + ( posx + sizex ) * ( xM - tmp) / ( MX); tmp = ym; ym = ym + ( posy - sizey ) * ( yM - ym ) / ( MY ); yM = tmp + ( posy + sizey ) * ( yM - tmp) / ( MY ); } cleardevice(); while( kbhit()) getch(); setwritemode( 0 ); /* OR */ mandel( MX, MY, xm, xM, ym, yM, min( ( unsigned )( 64.0 * ( 1.0 + fabs( log( fabs( xM - xm ))))), 250 ) ); while( kbhit()) getch(); /* !!! */ setwritemode( 1 ); /* XOR */ posx = MX / 2; posy = MY / 2; sizex = ( int )( sizexr = MX / 10 ); sizey = ( int )( sizeyr = MY / 10 ); setcolor( MC ); rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; case 'p' : scrollPalette(); break; case 's' : saveScreen(); setwritemode( 1 ); break; case 'r' : restoreScreen(); setwritemode( 1 ); continue; default : rectangle( posx - sizex, posy - sizey, posx + sizex, posy + sizey ); break; } setfillstyle( SOLID_FILL, MC ); bar( 0, 0, 400, 12 ); setcolor( 0 ); sprintf( s, "%8.7Lg %8.7Lg %8.7Lg %8.7Lg ", xm + ( posx - sizex ) * ( xM - xm ) / ( MX ), xm + ( posx + sizex ) * ( xM - xm ) / ( MX ), ym + ( posy - sizey ) * ( yM - ym ) / ( MY ), ym + ( posy + sizey ) * ( yM - ym ) / ( MY ) ); outtextxy( 1, 1, s ); setcolor( MC ); } while( r != '\x1b' ); closegraph(); puts( "**** That's all folks ! ****" ); getch(); }