Rotate Image

[TomaHawK]

Hi,

I'd like to know how to rotate an image A and then, with copyPixels,
insert it into image B, is this possible?

If you have any function/method done that rotates an image a certain
number of degrees please post it.

I think this is done using quads, but I'm having trouble to do it
right.

[JB]

of course, multiples of 90 degrees are a breeze to do with quads.

a cheat for other angles, for those trig impaired types, is to have
director do the rotation to quad conversion, on stage.

1. make a 3x3 pixel bitmap member, with centered regpoint.

2. place on stage, make inviible using ink, blend v,isibility or
location proeperty. This is the invisible 'survey sprite'

whan about to do copybits

a. set the rect of the invisible survey sprite to the destination rect
updatestage

b. set the rotation of the sprite to desired angle.

c. get the resulting quad of the sprite, apply this quad to copybits
destination, might need an ink or mask parameter to hide encloding rect
edges.

[TomaHawK]

Thank you for input, but as I'm not an imaging Lingo expert I don't
get much of it :(

Do you have anything already done that you can post?
That would be of a great help.

Thanks

On Sun, 24 Aug 2003 16:17:35 -0700, JB <lingoguy@sbcglobal.net> wrote:

>of course, multiples of 90 degrees are a breeze to do with quads.
>
>a cheat for other angles, for those trig impaired types, is to have
>director do the rotation to quad conversion, on stage.
>
>1. make a 3x3 pixel bitmap member, with centered regpoint.
>
>2. place on stage, make inviible using ink, blend v,isibility or
>location proeperty. This is the invisible 'survey sprite'
>
> whan about to do copybits
>
>a. set the rect of the invisible survey sprite to the destination rect
> updatestage
>
>b. set the rotation of the sprite to desired angle.
>
>c. get the resulting quad of the sprite, apply this quad to copybits
>destination, might need an ink or mask parameter to hide encloding rect
>edges.

[[Not Responding] webforumsuser@macromedia.com]

on rectToQuad(r)
return [\
point(r[1],r[2]),\
point(r[3],r[2]),\
point(r[1],r[4]),\
point(r[3],r[4])\
]
end

on getAngle(p0,p1)
y = p1[2] - p0[2] + 0.000001
x = p1[1] - p0[1] + 0.000001
if(y < 0 and x > 0) then beta = 360
if(y > 0 and x > 0) then beta = 0
if(x < 0) then beta = 180
return atan(y/x) * 180/pi + beta
end

on rotatePointTo (p0,p1,angle)
radius = sqrt((p0[1] - p1[1])*(p0[1] - p1[1]) + (p0[2] - p1[2])*(p0[2] - p1[2]))
return point(cos(angle*pi/180)*radius + p0[1],sin (angle*pi/180)*radius + p0[2])
end

on rotatePointBy (p0,p1,angle)
return rotatePointTo (p0,p1,angle + getAngle(p0,p1))
end

[D.Reefus webforumsuser@macromedia.com]

i'm not sure about the superimposition of pics, but to just simply rotate an image/sprite, go to property inspector and be sure that the entire window is opened up at the bottom so that it shows your x,y coordinates etc., and to rotate merely change the number in the 3rd box down from the left in the drop down window (just under your y coordinate, has a little arrow in a circle next to box).....this will rotate your image and also note that you can use negative numbers.....please let me know if this helped.....i wish i could help somebody, i wish i could get helped !...

[Eberlini webforumsuser@macromedia.com]

Kinda hard to understand what you mean exactly...but here goes nothing...

on enterFrame me

repeat while sprite(X).blend > 0

sprite(X).rotate = sprite(X).rotate + Y
sprite(X).blend = sprite(X).blend - N
updateStage

end repeat

end

This will rotate "sprite X" (X being the number of your sprite of course) along with changing the blend (opacity) of it as well by rotation increments of Y and opacity decrements of N until sprite X is completely transparent. Theres probably a good measure of rotation degrees combined with the level of opacity, but I'm too lazy to do the math for ya. Hope this is something you can use....I never used copyPixels() before I'm sure you can do some kind of member swaping method of some kind.

[Emil RT webforumsuser@macromedia.com]

Hi there,

I'm rotating an image in director via Lingo.
The thing is that the image looks pretty "jagged" after the rotation.
I've tried with booth png and jpg.

Can I come around this?

/Emil

[Andrew Morton]

You could use Effector Set I from
[url]http://www.medialab.com/products/EffectorSets.htm[/url]
Or have the original rather larger than the image you want displayed and use
copyPixels with quads to shrink and rotate the image.
Or make the shape as a vector shape.

You can search in the advanced groups search at groups.google.com for previous
posts on the above subjects.

Andrew