本帖最后由 523066680 于 2016-7-1 18:42 编辑
来自 http://迷路.jp 的图片
ありがとう「迷路.jp」2周年の迷路
以下图片,另存为 2.bmp
没看过相关算法书籍,自己写的,算法也非全自动,需要自己指定入口(那些专搞图形的家伙可以做
到自动锚定红色箭头和蓝色箭头),我的代码经过暴力调节使其恰好能跑出去(真是弱爆了 。。。
下面三个变量指定入口坐标和初始方向
state $ox = 137;
state $oy = 500 - 451;
state $ang = 70.0/360.0 * $PIx2;
此外运行还需要 OpenGL 模块的支持 ( ppm install opengl )
如果您真的搭建环境并运行了程序,按a b c d获得不同的速度
效果演示:
顺便推销一下论坛 http://www.open-gl.org/ 正在改版中 。。。
验证问题答案分别是 'float' 'open-gl.org' '12' 和 '多边形'- =info
- Code: vicyang
- Mail: 523066680@163
- Date: 2016-05
- 算法: 野生的
- =cut
-
-
- use v5.16;
- use feature "state";
- use IO::Handle;
- use OpenGL qw/ :all /;
- use OpenGL::Config;
- use Time::HiRes 'sleep','time';
-
- STDOUT->autoflush(1);
-
- use utf8;
- use Encode;
- use IO::Handle;
- STDOUT->autoflush(1);
- binmode(STDOUT, ":encoding(gbk)");
-
- our $WinID;
- our $win_x = 500;
- our $win_y = 500;
- our $PI = 3.1415927;
- our $PIx2 = $PI * 2;
-
- my $file = "2.bmp";
- my $READ;
-
- open $READ, "<:raw", $file or die "$!";
-
- my $v;
- read($READ, $v, 14, 0);
- our ($type, $bfSize, $res1, $res2, $offset) = (unpack 'SLSSL', $v);
-
- read($READ, $v, 4+4+4+2+2, 0);
- our ($headSize, $width, $height, $planes, $bitCount) = (unpack 'L3S2', $v);
-
- our $Compoments_per_pixel = $bitCount / 8;
- #有可能是RGBA,4个字节 => 32位情况下
- #有可能是RGB, 3个字节 => 24位情况下
-
- printf "文件字节数:%04x -> %d\n", $bfSize, $bfSize;
- printf "位图偏移量:%04x -> %d\n", $offset, $offset;
- printf " 宽 × 高:%d×%d\n", $width, $height;
- printf " 位图色深:%d 位\n", $bitCount;
-
- #实际宽度
- #Windows的BMP规定一个扫描行所占的字节数必须是 4字节的倍数,不足的以0填充
- my $rowLen = ($bfSize - $offset) / $height;
- my $rowCut = ($width * $Compoments_per_pixel) % 4; #RGBA的情况下自然为0
-
- #跳过文件头
- seek($READ, $offset, 0);
-
- my ($R, $G, $B);
- my $col = 0;
- my $lines = 0;
- my $j = 0;
- my @Colors;
- our %Coord;
- our @step;
- our %badway;
- our %way;
-
- =way struct
- {
- "ox oy" =>
- {
- "ang" => $ang, #当前ang
- "way" => [ratio1, ratio2, ratio3]
- }
- }
- =cut
-
- our $theVortex;
- our $delay;
- our $WRT;
- open $WRT,">:raw", "log.txt";
-
-
- while ( read( $READ, $v, $Compoments_per_pixel, 0) )
- {
- $col++;
- ($B, $G, $R) = unpack("C$Compoments_per_pixel", $v); #C4
-
- $Colors[$j++] =
- {
- 'R'=>$R/255.0,
- 'G'=>$G/255.0,
- 'B'=>$B/255.0,
- 'X'=>$col,
- 'Y'=>$lines
- };
-
- #@{$Coord{$col}{$lines}{'R','G','B'}} = ($R, $G, $B); #problem, keys => RGB
-
- $Coord{$col}{$lines} =
- {
- 'R' => $R,
- 'G' => $G,
- 'B' => $B,
- };
-
- if ($col == $width)
- {
- seek($READ, $rowCut, 1); #从当前去掉多余的填充字节
- $col = 0;
- $lines++;
- }
- }
-
- close $READ;
-
- my @xrr;
- my @yrr;
- for my $info (@Colors)
- {
- if ($info->{'R'} < 0.5 and $info->{'G'} < 0.5 and $info->{'B'} < 0.5 )
- {
- push @xrr, $info->{'X'};
- push @yrr, $info->{'Y'};
- }
- }
-
- #print join(", ", @xrr),"\n";
- #print join(", ", @yrr);
- #exit;
-
- &Main();
-
- sub display
- {
- state $times = 0;
- our $WinID;
- our %coord;
- our @step;
- our %badway;
- our %way;
-
- our $PI;
- our $PIx2;
-
- my $radDelta = $PIx2 / 50.0 ;
- my $limit = 120.0/360.0*$PIx2 ;
- my $len = 8.0;
- my $testlen = 10.0;
- my $ratio;
- my $rad;
- my $angx;
-
- my $ref;
-
- state $ox = 137;
- state $oy = 500 - 451;
- state $ang = 70.0/360.0 * $PIx2;
-
- my ($tx, $ty);
- my ($n_x, $n_y);
-
- glPushMatrix();
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glCallList($theVortex);
-
- my $flag;
-
- my $ways = 0;
- if (not defined $way{"$ox $oy"} )
- {
- LV1: for ( $ratio = -$limit; $ratio <= $limit; $ratio += $radDelta )
- {
- $angx = $ang + $ratio;
-
- $flag = linetest( $ox, $oy, $len, $angx );
- if ($flag == 1)
- {
- $ways++;
-
- #走中间线
- $rad = 0.0;
- do
- {
- $rad += $radDelta;
- }
- while ( (linetest( $ox, $oy, $testlen, $angx+$rad ) == 1) and ($rad < $PI) );
-
- $angx += $rad/2; #中间位置
- $ratio += $rad + (10.0/360.0*$PIx2); #略过这个连续区域
-
- $tx = $ox + around( $len * cos($angx) );
- $ty = $oy + around( $len * sin($angx) );
-
- glColor4f(1.0, 0.0, 1.0, 0.7);
- draw_line($ox, $oy, $tx, $ty, 1.0);
-
- push @{$way{"$ox $oy"}{'way'}},
- {
- 'angx' => $angx,
- 'tx' => $tx,
- 'ty' => $ty,
- };
- }
- }
- }
-
-
- glBlendFunc(GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glBegin(GL_LINE_STRIP);
- glColor4f(0.0, 0.2, 0.2, 0.8);
- for my $i ( 0 .. $#step )
- {
- glVertex3f( $step[$i]->[0], $step[$i]->[1], 1.0 );
- }
- glEnd();
-
-
- $ref = $way{"$ox $oy"}{'way'};
-
- if ( $#{$ref} >= 0 ) #存在多条路径的时候,存储当前节点,回退的时候用
- {
- push @step, [$ox, $oy, $ang];
- }
-
- printf "%3d %3d %7.3f times :%d step: %d ways: %d \n",
- $ox, $oy, $ang ,$times, $#step+1, $ways;
-
- #print $ref->[0]{'ty'};
- #exit;
-
- if ( $#{$ref} >= 0 )
- {
- draw_line($ox, $oy, $ref->[0]{'tx'}, $ref->[0]{'ty'}, 1.0);
-
- $ox = $ref->[0]{'tx'};
- $oy = $ref->[0]{'ty'};
- $ang = $ref->[0]{'angx'};
- shift @{$ref};
- }
- else
- {
- print "there is no way!\n";
- #pop @step;
- ($ox, $oy, $ang) = @{ $step[$#step] };
- pop @step;
- }
-
- glPopMatrix();
- glutSwapBuffers();
- $times++;
- }
-
- sub init
- {
- glClearColor(0.0, 0.0, 0.0, 1.0);
- our $t=1.0;
- our $delay;
-
- $delay = 0.1;
- glPointSize(1.0);
- glLineWidth(2.0);
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_BLEND);
- glEnable(GL_POINT_SMOOTH);
- glEnable(GL_LINE_SMOOTH);
-
- $theVortex=glGenLists(1);
- glNewList($theVortex, GL_COMPILE);
- drawbmp();
- glEndList();
- }
-
- sub drawbmp()
- {
- glBegin(GL_POINTS);
-
- for my $c (@Colors)
- {
- glColor4f( @$c{'R','G','B'}, 1.0 );
- glVertex3f( $c->{'X'}, $c->{'Y'}, 0.0);
- }
- glEnd();
- }
-
- sub idle
- {
- sleep $delay;
- glutPostRedisplay();
- }
-
- sub Reshape
- {
- our $width;
- our $height;
- glViewport(0.0, 0.0, $win_x, $win_y);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0.0, 500.0, 0.0, 500.0, 0.0,200.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- gluLookAt(0.0,0.0,100.0,0.0,0.0,0.0, 0.0,1.0,100.0);
- }
-
- sub hitkey
- {
- our $WinID;
- our %badway;
-
- my $keychar = lc(chr(shift));
- given ( $keychar )
- {
- when (/q/i) { glutDestroyWindow($WinID); dump_data( \%badway, "batway.txt" ); }
- when (/a/i) { $delay = 2.0; }
- when (/b/i) { $delay = 1.0; }
- when (/c/i) { $delay = 0.5; }
- when (/d/i) { $delay = 0.01; }
- when (/f/i) { glutPostRedisplay() }
- }
- }
-
- sub mouse
- {
- our %Coord;
- my (undef, undef, $x, $y) = @_;
-
- printf "Position %d %d, Color: %d %d %d\n",
- $x, $y,
- $Coord{$x}{500-$y}{'R'},
- $Coord{$x}{500-$y}{'G'},
- $Coord{$x}{500-$y}{'B'},
- ;
- }
-
- sub Main
- {
- glutInit();
- glutInitDisplayMode( GLUT_DEPTH | GLUT_RGBA | GLUT_DOUBLE );
- glutInitWindowSize($win_x, $win_y);
- glutInitWindowPosition(1,1);
- our $WinID = glutCreateWindow("title");
- &init();
- glutDisplayFunc(\&display);
- glutReshapeFunc(\&Reshape);
- glutKeyboardFunc(\&hitkey);
- glutMouseFunc(\&mouse);
- glutIdleFunc(\&idle);
- glutMainLoop();
- }
-
- =Function
- =cut
-
- sub around
- {
- my $num = shift;
- my $n = int($num);
-
- if ( $num - $n >= 0.5)
- {
- return $n + 1;
- }
- else
- {
- return $n;
- }
- }
-
- sub dump_data
- {
- use Data::Dumper;
- my ($hashref, $file) = @_;
-
- open WRT, ">:raw:crlf", $file or warn "$!";
- print WRT Data::Dumper->Dump([$hashref], ['*badway']);
- close WRT;
-
- no YAML;
- }
-
- sub linetest
- {
- our %coord;
- my ($ox, $oy, $len, $angx) = @_;
- my $ref;
- my $flag;
- my $tx;
- my $ty;
-
- $flag = 1;
- for my $test (1 .. $len+1)
- {
- for my $w ( -1..1 )
- {
- $tx = $ox + around( $test * cos( $angx ) - $w * sin( $angx) );
- $ty = $oy + around( $w * cos( $angx ) + $test * sin ($angx) );
-
-
- if ($ty < 0 or $tx < 0)
- {
- die "What?\n"
- }
-
- $ref = $Coord{ $tx }{ $ty };
-
- if ( $ref->{'R'} < 150 and $ref->{'G'} < 150 and $ref->{'B'} < 150 )
- {
- $flag = 0;
- }
- else
- {
- # glColor4f(0.5, 0.0, 0.5, 1.0);
- # glBegin(GL_LINES);
- # glVertex3f( $ox, $oy, 0.5);
- # glVertex3f( $tx, $ty, 0.5);
- # glEnd();
- }
- }
- }
-
- return $flag;
- }
-
- sub draw_line
- {
- my ($ox, $oy, $tx, $ty, $z) = @_;
- glBegin(GL_LINES);
- glVertex3f( $ox, $oy, $z);
- glVertex3f( $tx, $ty, $z);
- glEnd();
- }
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