1. <pre>
2. <?php
3. /**
4. * @author Andrii Kasian
5. */
7. $captcha = new Captcha4d();
8. $captcha->render();
11. class Captcha4d{
12. const CHARS = 'WEafRTYIPAGHJKXBNM3479j';
13. protected $hypot = 5;
14. protected $image = null;
15. protected $_sin = array();
16. protected $text = '';
18. public function __construct()
19. {
20. $this->time = microtime(true);
21. $this->generateCode();
23. }
24. protected function generateCode()
25. {
26. $chars = self::CHARS;
27. for($i =; $i<3; $i++){
28. $this->text .= $chars{ mt_rand(,22)};
29. }
30. }
32. public function getText()
33. {
34. return $this->text;
35. }
36. protected function getProection($x, $y, $z)
37. {
39. $xx = 0.70710;
40. $xz = ;
41. $xy = 0.70710;
43. $yx = 0.40824;
44. $yz = 0.81649;
45. $yy = -0.40824;
47. $cx = $xx*$x + $xy*$y + $xz*$z - 5;
48. $cy = $yx*$x + $yy*$y + $yz*$z + 20;
49. return array(
50. 'x' => $cx * $this->hypot,
51. 'y' => $cy * $this->hypot
52. );
53. }
55. function zFunction($x,$y){
56. $z = imagecolorat($this->image,$y/2,$x/2)>?3:;
57. if( $z != ){
58. $z += -2+ 2*
59. $this->_sin[($x+$this->startX)%30]
60. *
61. $this->_sin[($y+$this->startY)%30];
62. }
63. $z += mt_rand(,30)/50;
64. return $z;
65. }
66. public function render()
67. {
68. $xx = 30;
69. $yy = 60;
71. $animation = new Imagick();
72. $animation->setFormat( "gif" );
74. $cw = new ImagickPixel("white");
75. $cb = new ImagickPixel("#000000");
77. $this->image = imageCreateTrueColor(100, 20);
79. $whiteColor = imageColorAllocate($this->image,255,255,255);
80. imageFilledRectangle($this->image,,,$yy * $this->hypot , $xx * $this->hypot, $whiteColor);
81. $textColor = imageColorAllocate($this->image,,,);
82. imageString($this->image, 5, 3, , $this->text, $textColor);
84. $cof = 2*3.141592654/$xx;
85. for($x = ; $x < $xx + 1; $x++){
86. $this->_sin[$x] = sin($x*$cof);
87. }
88. $this->startX = mt_rand(,$xx);
89. $this->startY = mt_rand(,$yy);
91. $draw = new ImagickDraw();
92. $countFrame = 25;
94. for ( $i = ; $i < $countFrame; $i++ ) {
95. $this->startX += $xx / $countFrame;
97. $coordinates = array();
98. for($x = ; $x < $xx + 1; $x++){
99. for($y = ; $y < $yy + 1; $y++){
100. $coordinates[$x][$y] = $this->getProection($x,$y,$this->zFunction($x,$y));
101. }
102. }
104. $animation->newImage( $yy * $this->hypot , $xx * $this->hypot, $cw);
106. $im = new ImagickDraw();
107. $im->setFillColor($cw);
108. $im->setStrokeColor($cb);
109. $im->setStrokeAntialias(true);
110. for($x = ; $x < $xx; $x++){
111. for($y = ; $y < $yy; $y++){
112. $coord = array();
113. $coord[] = $coordinates[$x][$y];
114. $coord[] = $coordinates[$x+1][$y];
115. $coord[] = $coordinates[$x+1][$y+1];
116. $coord[] = $coordinates[$x][$y+1];
118. $im->polygon($coord);
119. }
120. }
121. $animation->drawImage($im);
122. $animation->setImageDelay( 100/$countFrame );
123. }
125. header( "Content-Type: image/gif" );
126. echo $animation->getImagesBlob();die();
127. }
128. }