How to make the actor rotate from corner

justpro5

Hi mates
Please what is the way for the actor to be rotated from the corner rather than use transparent?

justpro5

hi tshirtbooth
Thanks for your reply
I really found that UtopianGame did it in his game bumps.
I hope that he tells us how he did it.

calvin9403

rotate form corner? what do you mean?

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http://www.gamesaladforum.com/

calvin9403

he can try animate

scitunes

I assume that someone with better math skills than me could use trig to do what you are trying to do. You could use sin and cos to make an actor rotate around the bottom edge center pretty easily. Not sure about bottom corner, though.

hdeanda

Try this quick dirty example:

Add to landscape scene:

white square actor size width 75, height 75

rotate manually to 45 degrees

Add behavior Constrain Attribute

constrain attribute: self.Position.X To: 40*cos(self.Time*180%360)+240

Add behavior Constrain Atrribute

constrain attribute: self.Position.Y To: 40*sin(self.Time*180%360)+160

Add Rotate Behavior

direction: Counter Clockwise
speed: 180

The 240 and 160 in the above constrains are the (x,y) center of rotation and can be moved with everything still rotating at the "corner".

Refer also to "How do I make an actor move in a perfect circle?" in GameSalad's How To section for more on the variables.

justpro5

Thanks all for sharing ,
Hdeanda I tried your example ,but it still rotate from the middle.Please can you do it and send attachment?

justpro5

tshirtbooth
please check the UtopianGame "bumps" . I bought the game for checking this . It works .
tshirtbooth if I use transparent will the actor hit the ball also if the ball collide with the transparent side or not . If yes this is not happened with the UtopianGame bumps.

Asymptoteell

Here's what I think you'll have to do:

1. Make your actor rotate normally from center.

2. Make your actor move in a circle (http://gamesalad.com/wiki/how_tos:gsc_circular_movement) with a radius of 1/2 the actor's diagonal length (use pythagorean's theorm) and make it move at the same speed it's rotating at (you'll have to tweak it)

I'll try making a demo.

Asymptoteell

hdeanda

Asymptoteell said:
Here's what I think you'll have to do:

1. Make your actor rotate normally from center.

2. Make your actor move in a circle (http://gamesalad.com/wiki/how_tos:gsc_circular_movement) with a radius of 1/2 the actor's diagonal length (use pythagorean's theorm) and make it move at the same speed it's rotating at (you'll have to tweak it)

I'll try making a demo.

Asymptoteell

exactly The square will "orbit" a point that is the same distance from it's center to a corner while rotating at the same speed of its orbit.

Asymptoteell

I got a working one. You can suit it to your needs by changing the rotational speed (what it's constrained to) Also, the last number in the constraints for positions X and Y should be the positions X and Y of the corner.
http://gamesalad.com/ontheappstore/22704
Hope it helps.

Asymptoteell

tenrdrmer

Asymptoteell said:
I got a working one. You can suit it to your needs by changing the rotational speed (what it's constrained to) Also, the last number in the constraints for positions X and Y should be the positions X and Y of the corner.
http://gamesalad.com/ontheappstore/22704
Hope it helps.

Asymptoteell

Very nice.

yet another bit of proof anything can be done with math. Man I wish I didn't sleep/skip trig both times I took it in High School.

Great work Asymptoteell

Asymptoteell

Thanks, tendrmer. Is there a reason it isn't working on my computer online? Do I need to update the web thing?

tenrdrmer

I think the whole web thing is down I have noticed it on anything I have tried over the last week. it was actually down before the update.

I got your demo by searching the name in GameSalads Dashboard.

Asymptoteell

Thanks, tendrmer. Just wanted to make sure it wasn't my problem.

justpro5

Asymptoteell said:
I got a working one. You can suit it to your needs by changing the rotational speed (what it's constrained to) Also, the last number in the constraints for positions X and Y should be the positions X and Y of the corner.
http://gamesalad.com/ontheappstore/22704
Hope it helps.

Asymptoteell

How to download your demo please?

Asymptoteell

I havent downloaded anything since they updated the website. Anyone know?

calvin9403

just search it when you open GS

Asymptoteell

Oh yeah. I forgot you can do that now.

justpro5

Asymptoteell

Great Gob ... Thanks really very much.

calvin9403
thanks for clarification

Asymptoteell

Happy to help. If you need anything else, just ask.