imageaffinematrixconcat 
RETURN the concatenation of two affine transformation matrices, what is useful if multiple transformations should be applied to the same image in one go.
AFFINE
is a geometric transformation operation involving MATRICES, covering both, 2D and 3D environment.
Transformations are often used in linear algebra and computer graphics.
In geometric transformations of images, the pixel coordinate is mapped.
This means that, each pixel is localized by two coordinates, in the rectangular domain of the image.
Without going into more details about pixel mapping, let's get to what really matters: the AFFINE transformations.
There are several classes of pixel mapping, one is called AFFINE.
AFFINE transformations include: scaling, rotation, shearing and translation.
<?php
array|false imageaffinematrixconcat ( array $matrix1, array $matrix2 )
where,
$matrix1 = An ARRAY of affine transformation matrix
with keys 0 to 5 and float values
$matrix2 = An ARRAY of affine transformation matrix
with keys 0 to 5 and float values
?>
$matrix1
An AFFINE ARRAY with keys 0 to 5 and FLOAT values.
| KEYS |
MEANING |
| 0 |
arr1_0x |
| 1 |
arr1_1x |
| 2 |
arr1_2y |
| 3 |
arr1_3y |
| 4 |
arr1_4 |
| 5 |
arr1_5 |
| ed48 |
$matrix2
An AFFINE ARRAY with keys 0 to 5 and FLOAT values.
| KEYS |
MEANING |
| 0 |
arr2_0x |
| 1 |
arr2_1x |
| 2 |
arr2_2y |
| 3 |
arr2_3y |
| 4 |
arr2_4 |
| 5 |
arr2_5 |
| ed48 |
RETURNED VALUES
| RETURNED ARRAY INDEX |
MEANING |
| 0 |
a |
| 1 |
b |
| 2 |
c |
| 3 |
d |
| 4 |
x |
| 5 |
y |
| ed48 |
This function returns
FALSE on failure.
EXERCISE
<?php
echo 'PHP VERSION: ' . PHP_VERSION . '<br><br>';
$dest_img = "png/PNG 088 01 0.png";
$dest_aff1 = "png/PNG 088 01 1.png";
$dest_aff2 = "png/PNG 088 01 2.png";
$dest_conci = "png/PNG 088 01 3.png";
$dest_concj = "png/PNG 088 01 4.png";
$dest_conc = "png/PNG 088 01 5.png";
$arr_clip = [ 'x' => 90, 'y' => 80,
'width' => 200, 'height' => 150 ];
$arr_affi = [ '0' => -1, '1' => 0, '2' => 0,
'3' => -0.5, '4' => 0, '5' => 0 ];
$arr_affj = [ '0' => 1, '1' => 0, '2' => 0,
'3' => 2, '4' => 0, '5' => 0 ];
$id_base = imagecreatetruecolor(300,300);
imageantialias($id_base, 1);
$colorln = imagecolorallocate($id_base, 255, 255, 0);
$colorfl = imagecolorallocate($id_base, 255, 255, 0);
$star = [ 191,90, 209,142, 264,143,
220,177, 236,230, 191,199,
146,231, 161,177, 119,143,
172,143, 191,90 ];
$starv = 11;
$polystar = imagepolygon($id_base, $star, $starv, $colorln);
$polystarfl =
imagefilledpolygon($id_base, $star, $starv, $colorfl);
// yellowstar
imagepng($id_base, $dest_img);
$id_affi = imageaffine($id_base, $arr_affi, $arr_clip);
// yellowstar1
imagepng($id_affi, $dest_aff1);
echo $dest_img;
// yellowstar2
$id_affj = imageaffine($id_base, $arr_affj, $arr_clip);
imagepng($id_affj, $dest_aff2);
// yellowstar3
$arr_conc = imageaffinematrixconcat($arr_affi, $arr_affj);
$id_conci = imageaffine($id_base, $arr_conc, $arr_clip);
imagepng($id_conci, $dest_conci);
// yellowstar4
$id_concj = imageaffine($id_base, $arr_conc, $arr_clip);
imagepng($id_concj, $dest_concj);
// yellowstar5
$id_conc = imageaffine($id_base, $arr_conc);
imagepng($id_conc, $dest_conc);
?>
<br><br><img src="<?php echo
$dest_img; ?>" alt="<?php echo $dest_img; ?>">
<br><br><br>
<?php
echo $dest_aff1 . '<br><br>';
print_r($arr_affi);
echo '<br>';
print_r($arr_clip); ?>
<br><br><img src="<?php echo
$dest_aff1; ?>" alt="<?php echo $dest_aff1; ?>">
<br><br><br>
<?php
echo $dest_aff2 . '<br><br>';
print_r($arr_affj);
echo '<br>';
print_r($arr_clip); ?>
<br><br><img src="<?php echo
$dest_aff2; ?>" alt="<?php echo $dest_aff2; ?>">
<br><br><br>
<?php echo $dest_conci . '<br><br>';
print_r($arr_conc);
echo '<br>';
print_r($arr_clip); ?>
<br><br><img src="<?php echo
$dest_conci; ?>" alt="<?php echo $dest_conci; ?>">
<br><br><br>
<?php echo $dest_concj . '<br><br>';
print_r($arr_conc);
echo '<br>';
print_r($arr_clip); ?>
<br><br><img src="<?php echo
$dest_concj; ?>" alt="<?php echo $dest_concj; ?>">
<br><br><br>
<?php echo $dest_conc . '<br><br>';
print_r($arr_conc); ?>
<br><br><img src="<?php echo
$dest_conc; ?>" alt="<?php echo $dest_conc; ?>">
<br><br>
RESULT PNG 088 01 0.png
PNG 088 01 1.pngArray
(
[0] => -1
[1] => 0
[2] => 0
[3] => -0.5
[4] => 0
[5] => 0
)
Array
(
[x] => 90
[y] => 80
[width] => 200
[height] => 150
)
PNG 088 01 2.pngArray
(
[0] => 1
[1] => 0
[2] => 0
[3] => 2
[4] => 0
[5] => 0
)
Array
(
[x] => 90
[y] => 80
[width] => 200
[height] => 150
)
PNG 088 01 3.pngArray
(
[0] => -1
[1] => 0
[2] => 0
[3] => -1
[4] => 0
[5] => 0
)
Array
(
[x] => 90
[y] => 80
[width] => 200
[height] => 150
)
PNG 088 01 4.pngArray
(
[0] => -1
[1] => 0
[2] => 0
[3] => -1
[4] => 0
[5] => 0
)
Array
(
[x] => 90
[y] => 80
[width] => 200
[height] => 150
)
PNG 088 01 5.pngArray
(
[0] => -1
[1] => 0
[2] => 0
[3] => -1
[4] => 0
[5] => 0
)
