rotate, other coordinates?
up vote
-2
down vote
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I want to rotate .. 45 degrees, but the wrong coordinates are returned.
Perhaps a translation or transformation of coordinates is required ?
use strict; use warnings;
use Math::Trig;
my $width = 3;
my $height = 3;
my $radians = 45 * (pi / 180);
my $center = 1.5;
for my $w(0..$width -1){
for my $h(0..$height -1){
my $x = int($center + ($h - $center) * cos($radians) + ($w - $center) * sin($radians));
my $y = int($center - ($h - $center) * sin($radians) + ($w - $center) * cos($radians));
print "$x:$yn";
}
}
need to
1:0
0:0
0:1
2:0
1:1
0:2
2:1
2:2
1:2
returns
0:1
0:0
0:0
0:2
0:1
1:0
0:2
1:2
2:1
perl rotation
edited Nov 22 at 13:33
ikegami
260k11174394
asked Nov 22 at 11:13
usr13
2213
|
show 2 more comments
up vote
-2
down vote
favorite
I want to rotate .. 45 degrees, but the wrong coordinates are returned.
Perhaps a translation or transformation of coordinates is required ?
use strict; use warnings;
use Math::Trig;
my $width = 3;
my $height = 3;
my $radians = 45 * (pi / 180);
my $center = 1.5;
for my $w(0..$width -1){
for my $h(0..$height -1){
my $x = int($center + ($h - $center) * cos($radians) + ($w - $center) * sin($radians));
my $y = int($center - ($h - $center) * sin($radians) + ($w - $center) * cos($radians));
print "$x:$yn";
}
}
need to
1:0
0:0
0:1
2:0
1:1
0:2
2:1
2:2
1:2
returns
0:1
0:0
0:0
0:2
0:1
1:0
0:2
1:2
2:1
perl rotation
edited Nov 22 at 13:33
ikegami
260k11174394
asked Nov 22 at 11:13
usr13
2213
1
$textis irrelevant to the question. What output do you expect?
– choroba
Nov 22 at 11:25
from 123456789 to 412753896
– usr13
Nov 22 at 12:01
1
It outputs things like0:1or2:1, the $text is not used at all.
– choroba
Nov 22 at 12:05
OK, how do move the text from the angle? here is not a complete code, I cut it
– usr13
Nov 22 at 12:14
What are you trying to compute? What formula are you using?
– choroba
Nov 22 at 13:53
|
show 2 more comments
up vote
-2
down vote
favorite
up vote
-2
down vote
favorite
I want to rotate .. 45 degrees, but the wrong coordinates are returned.
Perhaps a translation or transformation of coordinates is required ?
use strict; use warnings;
use Math::Trig;
my $width = 3;
my $height = 3;
my $radians = 45 * (pi / 180);
my $center = 1.5;
for my $w(0..$width -1){
for my $h(0..$height -1){
my $x = int($center + ($h - $center) * cos($radians) + ($w - $center) * sin($radians));
my $y = int($center - ($h - $center) * sin($radians) + ($w - $center) * cos($radians));
print "$x:$yn";
}
}
need to
1:0
0:0
0:1
2:0
1:1
0:2
2:1
2:2
1:2
returns
0:1
0:0
0:0
0:2
0:1
1:0
0:2
1:2
2:1
perl rotation
edited Nov 22 at 13:33
ikegami
260k11174394
asked Nov 22 at 11:13
usr13
2213
I want to rotate .. 45 degrees, but the wrong coordinates are returned.
Perhaps a translation or transformation of coordinates is required ?
use strict; use warnings;
use Math::Trig;
my $width = 3;
my $height = 3;
my $radians = 45 * (pi / 180);
my $center = 1.5;
for my $w(0..$width -1){
for my $h(0..$height -1){
my $x = int($center + ($h - $center) * cos($radians) + ($w - $center) * sin($radians));
my $y = int($center - ($h - $center) * sin($radians) + ($w - $center) * cos($radians));
print "$x:$yn";
}
}
need to
1:0
0:0
0:1
2:0
1:1
0:2
2:1
2:2
1:2
returns
0:1
0:0
0:0
0:2
0:1
1:0
0:2
1:2
2:1
perl rotation
perl rotation
edited Nov 22 at 13:33
ikegami
260k11174394
asked Nov 22 at 11:13
usr13
2213
edited Nov 22 at 13:33
ikegami
260k11174394
asked Nov 22 at 11:13
usr13
2213
edited Nov 22 at 13:33
ikegami
260k11174394
edited Nov 22 at 13:33
ikegami
260k11174394
edited Nov 22 at 13:33
ikegami
260k11174394
260k11174394
asked Nov 22 at 11:13
usr13
2213
asked Nov 22 at 11:13
usr13
2213
asked Nov 22 at 11:13
usr13
2213
2213
1
$textis irrelevant to the question. What output do you expect?
– choroba
Nov 22 at 11:25
from 123456789 to 412753896
– usr13
Nov 22 at 12:01
1
It outputs things like0:1or2:1, the $text is not used at all.
– choroba
Nov 22 at 12:05
OK, how do move the text from the angle? here is not a complete code, I cut it
– usr13
Nov 22 at 12:14
What are you trying to compute? What formula are you using?
– choroba
Nov 22 at 13:53
|
show 2 more comments
1
$textis irrelevant to the question. What output do you expect?
– choroba
Nov 22 at 11:25
from 123456789 to 412753896
– usr13
Nov 22 at 12:01
1
It outputs things like0:1or2:1, the $text is not used at all.
– choroba
Nov 22 at 12:05
OK, how do move the text from the angle? here is not a complete code, I cut it
– usr13
Nov 22 at 12:14
What are you trying to compute? What formula are you using?
– choroba
Nov 22 at 13:53
1
1
$text is irrelevant to the question. What output do you expect?– choroba
Nov 22 at 11:25
$text is irrelevant to the question. What output do you expect?– choroba
Nov 22 at 11:25
from 123456789 to 412753896
– usr13
Nov 22 at 12:01
from 123456789 to 412753896
– usr13
Nov 22 at 12:01
1
1
It outputs things like
0:1 or 2:1, the $text is not used at all.– choroba
Nov 22 at 12:05
It outputs things like
0:1 or 2:1, the $text is not used at all.– choroba
Nov 22 at 12:05
OK, how do move the text from the angle? here is not a complete code, I cut it
– usr13
Nov 22 at 12:14
OK, how do move the text from the angle? here is not a complete code, I cut it
– usr13
Nov 22 at 12:14
What are you trying to compute? What formula are you using?
– choroba
Nov 22 at 13:53
What are you trying to compute? What formula are you using?
– choroba
Nov 22 at 13:53
|
show 2 more comments
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1
$textis irrelevant to the question. What output do you expect?– choroba
Nov 22 at 11:25
from 123456789 to 412753896
– usr13
Nov 22 at 12:01
1
It outputs things like
0:1or2:1, the $text is not used at all.– choroba
Nov 22 at 12:05
OK, how do move the text from the angle? here is not a complete code, I cut it
– usr13
Nov 22 at 12:14
What are you trying to compute? What formula are you using?
– choroba
Nov 22 at 13:53