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How to rotate an img based on a reference point?
Posted: Sun Oct 10, 2010 4:26 pm
by weilies
I realized the love framework always based on point 0,0
Imagine I loaded arrow up image and rotate 30 degree, the rotation point suppose to based on the bottom of the img and not 0, 0 of the img
Re: How to rotate an img based on a reference point?
Posted: Sun Oct 10, 2010 4:32 pm
by Robin
Look at
http://love2d.org/wiki/love.graphics.draw
The last two parameters, ox and oy are the origin offset, around that point are images rotated.
When in doubt, read the wiki.
Re: How to rotate an img based on a reference point?
Posted: Sun Oct 10, 2010 5:19 pm
by zac352
Then there's doing it manually...
Code: Select all
local angle;
local x,y;
local ox,oy;
local a,b=math.sin(angle),math.cos(angle) --Trig ftw.
local rx,ry=x+a*ox,y+a*oy;
If that doesn't work, blame my sugar rush from just drinking a LOT of pepsi.
Re: How to rotate an img based on a reference point?
Posted: Sun Oct 10, 2010 5:48 pm
by Robin
zac, please don't do that.
weilies: you can ignore zac's post.
Re: How to rotate an img based on a reference point?
Posted: Sun Oct 10, 2010 6:03 pm
by zac352
Robin wrote:zac, please don't do that.
weilies: you can ignore zac's post.
I'm sowwy.
I couldn't help it.
