Yes. I finally get it. My professor went in some detail with all of
your explanation and it makes sense. Thank you.
This thread can be closed now.
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No, but its upper left corner is consistently being kept at (20,20),
as the code asks.
If you were to write
(underlay (rotate ang TRI) BACKGROUND)
in the body of render, you'd see the triangle also wiggling in this
way, but that's because the center of the bounding box is being kept
in a fixed
OK. Here is what I am trying to do.
The game screenshot:
http://img829.imageshack.us/img829/4864/65490383.jpg
I am trying to rotate the guy's arm by the dynamic degree denoted on the
bottom-left corner of the screen. I just have to center the rotated image.
How would I go about doing that?
Com
@Robby Findler : I see what you mean. But in this example given by Paul
Ojanen
(require 2htdp/image)
(require 2htdp/universe)
(define BACKGROUND (rectangle 100 100 "outline" "white"))
(define TRI (triangle 35 "solid" "blue"))
(define (render ang)
(place-image (rotate ang TRI) 20 20 BACKGROUND))
Woah...so many good responses...thank you all
Now give me some time to read all of this and try to understand before I ask
another question.
NOTE: This topic is not yet closed. I will get back with a response in a
bit. Gotta ask my professor some questions as well.
Paul Ojanen's reply outlined t
ly 19, 2010 5:52 PM
> To: Eugene Wallingford
> Cc: users@racket-lang.org
> Subject: Re: [racket] rotate an image using 2htdp/image
>
> Well, the 2htdp/image library does not work like that. If you overlay
> and the rotate then your background will be roated. If you rotate and
"solid" "blue"
(big-bang 1 (on-tick add1) (on-draw render))
-Paul
_
From: users-boun...@racket-lang.org [mailto:users-boun...@racket-lang.org]
On Behalf Of Mathew Kurian
Sent: Monday, July 19, 2010 4:38 PM
To: users@racket-lang.org
Subject: [racket] rot
But these are two orthogonal questions:
-- rotating an image
-- placing an image in a "constrained" background
Shouldn't they be provided by two distinct functions?
On Jul 19, 2010, at 5:32 PM, Eugene Wallingford wrote:
>
>>> Just want to clear up thingsthe how can adjust the pinho
Well, the 2htdp/image library does not work like that. If you overlay
and the rotate then your background will be roated. If you rotate and
then overlay the you may place things in different (relative)
positions but you still don't get any different behavior by rotating
around different points.
Ma
> > Just want to clear up thingsthe how can adjust the pinhole or the
> > rotation center?
>
> There is no pinhole. My earlier reply was trying to tell you that this
> question does not make sense.
Perhaps Matthew is concerned not so much with the
resulting orientation of the image
On Mon, Jul 19, 2010 at 3:37 PM, Mathew Kurian wrote:
>
>
>
> Just want to clear up thingsthe how can adjust the pinhole or the
> rotation center?
There is no pinhole. My earlier reply was trying to tell you that this
question does not make sense.
Go get a rectangle (maybe a plate in your ho
Just want to clear up thingsthe how can adjust the pinhole or the
rotation center?
And Stephen Bloch, can you explain in a bit more detail...seems like that
is exactly what i am looking for...but i am having challenging understanding
the concept.
I am making trying to make a shooter game and
On Jul 19, 2010, at 11:54 AM, Mathew Kurian wrote:
> I am trying to rotate an image around a certain point. Using the 2htdp/image
> and its rotate function, it seems to be rotating the image.
>
> But what is it rotating around?
In a sense, it's the center (more precisely, the center of the b
There is no difference between rotating an image around different
points in the image. (Give it a try and see!)
Robby
On Mon, Jul 19, 2010 at 10:54 AM, Mathew Kurian wrote:
> Hi guys,
>
> Hope you all having a great day.
>
> I got a question for you all.
>
> I am trying to rotate an image around
Hi guys,
Hope you all having a great day.
I got a question for you all.
I am trying to rotate an image around a certain point. Using the 2htdp/image
and its rotate function, it seems to be rotating the image.
But what is it rotating around?
I appreciate all your help.
Thank you.
MK
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