Scratch
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#1 2011-09-04 10:27:07
Turn around a certain point
A cool feature to be added to Scratch that could help 3d projects: a block that sets the sprite center to a certain point.
Example:
Set center to(x;y)
turn 15 degrees
thus you could make 3d racing game!
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#2 2011-09-04 10:48:49
Re: Turn around a certain point
I think that the idea here is to be able to adjust the center of a sprite's costume with a block while the project is running? I think that would be rather useful in some cases - it would certainly reduce the need for trigonometry.
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#3 2011-09-04 13:23:20
Re: Turn around a certain point
Harakou wrote:
I think that the idea here is to be able to adjust the center of a sprite's costume with a block while the project is running? I think that would be rather useful in some cases - it would certainly reduce the need for trigonometry.
Yes exactly
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#4 2011-09-04 19:19:56
Re: Turn around a certain point
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#5 2011-09-04 20:04:08
- Trekkie210
- Scratcher
- Registered: 2010-08-04
- Posts: 500+
Re: Turn around a certain point
Isn't it already possible with Trig?
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#6 2011-09-04 20:19:45
Re: Turn around a certain point
Trekkie210 wrote:
Isn't it already possible with Trig?
Some people don't know trig...
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#7 2011-09-05 08:36:55
- hello12345678910
- Scratcher
- Registered: 2009-07-11
- Posts: 100+
Re: Turn around a certain point
Sorry to disappoint you, But this won't work.
See, If you have a sprite with the center at the middle,
[ . ]
And change it 5 to the left,
. [ . ]
This would make it rotate around the point, but would screw up the entire movement system. A better approach would be to have a whole new block,
| rotate [ ] degrees around x: [ ] y: [ ] |
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#8 2011-09-05 09:25:44
Re: Turn around a certain point
I like hello12345678910's idea about the movement block. 
I agree the movement system would be terribly messed up.
It is already possible with trigonometry, but not everybody knows a whole lot about it, especially at the Scratch age.
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#9 2011-09-05 12:17:07
Re: Turn around a certain point
hello12345678910 wrote:
Sorry to disappoint you, But this won't work.
See, If you have a sprite with the center at the middle,
[ . ]
And change it 5 to the left,
. [ . ]
This would make it rotate around the point, but would screw up the entire movement system. A better approach would be to have a whole new block,
| rotate [ ] degrees around x: [ ] y: [ ] |
Ah, you do have a point. The sprite would seem to move as soon as you changed the costume center.
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#10 2011-09-05 13:01:56
Re: Turn around a certain point
Harakou wrote:
hello12345678910 wrote:
Sorry to disappoint you, But this won't work.
See, If you have a sprite with the center at the middle,
[ . ]
And change it 5 to the left,
. [ . ]
This would make it rotate around the point, but would screw up the entire movement system. A better approach would be to have a whole new block,
| rotate [ ] degrees around x: [ ] y: [ ] |Ah, you do have a point. The sprite would seem to move as soon as you changed the costume center.
Yes, probably this is a better idea.
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