Sonic 1 Special stage

Good afternoon all!

Hope this is the right place to post this. I have been trying to emulate Sonic 1's rotating special stage for a while now. I, for the life of me, cannot do it. I've gotten to the point where it sort of works, but the blocks start to "fall apart" due to, what I am assuming, the decimal points not being far enough out. I will upload my attempt later this afternoon if anyone wants to take a crack at it.

Here is what I am trying to do.

https://www.youtube.com/watch?v=JuglWOHxNQs

Any help or suggestions would be great! Or, if its even possible :)

EDIT: I might note that the difficulty comes around the fact that the stage rotates around the Sonic object itself. It isn't just rotating in a circle at one certain point. That's where the trouble for me is coming.

It almost looks like you answered your own question.

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It isn't just rotating in a circle at one certain point.

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So, what you'd have to do is constantly set that point to your character. Set initial points for everything and have an offset for when you move around.

Be sure to share your progress. :)

Ive attached my testing. Please ignore the really messing events, as its just a lot of "lets see what works quick" :)

Pressing and holding S will show you the mess.

I suggest checking out the Satellites Example here: http://www.castles-of-britain.com/mmfexamples-s.htm

That at least covers the idea of objects moving around a central point without using an extension. Start from there and see if you can cook something up. ;)

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Originally Posted by raxabit

I suggest checking out the Satellites Example here: http://www.castles-of-britain.com/mmfexamples-s.htm

That at least covers the idea of objects moving around a central point without using an extension. Start from there and see if you can cook something up. ;)

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I appreciate the feedback, but I already have the basic concept of rotating something around a central object (If you see the third or fourth frame in my example posted). The difficulty lies around recalculating the distance needed to rotate between Sonic and the stage itself. I'm still not convinced its possible in Fusion.

One thing to try would be to create the stage as 1 image and import as an active object. Set the collision to the object and make it's hotspot centered. Set an alterable value that goes between 2 numbers based on when/if you hit the "R" object.

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Originally Posted by Warmachine

One thing to try would be to create the stage as 1 image and import as an active object. Set the collision to the object and make it's hotspot centered. Set an alterable value that goes between 2 numbers based on when/if you hit the "R" object.

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What most don't notice is the stage doesn't just "rotate in circle". It rotates around the sonic object itself. Watch very closely. The focal point is sonic, and everything rotates around him. Its not as simple as rotating it around the middle of the stage. Its rather difficult to program. Naka was a genius :(

Double post -- please remove

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Originally Posted by Hezmania

I appreciate the feedback, but I already have the basic concept of rotating something around a central object (If you see the third or fourth frame in my example posted). The difficulty lies around recalculating the distance needed to rotate between Sonic and the stage itself. I'm still not convinced its possible in Fusion.

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I think it is possible, but perhaps difficult. Instead of moving Sonic through everything, I'm going to try moving everything around Sonic. Hopefully there will be results between tonight and tomorrow.

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Originally Posted by Warmachine

One thing to try would be to create the stage as 1 image and import as an active object. Set the collision to the object and make it's hotspot centered. Set an alterable value that goes between 2 numbers based on when/if you hit the "R" object.

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An active image allows for hot spot changes, but would leave you dead in the water for interaction. Each wall block has to be interactive.

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Originally Posted by raxabit

I think it is possible, but perhaps difficult. Instead of moving Sonic through everything, I'm going to try moving everything around Sonic. Hopefully there will be results between tonight and tomorrow.



An active image allows for hot spot changes, but would leave you dead in the water for interaction. Each wall block has to be interactive.

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I had very little luck with having the objects move around sonic, BUT I think its key. I'm hoping you have better luck than I did. It seems to be quite the challenge :)

Sorry for the double post. Attached a more basic example of what I'm trying to get. Run the frame, press 1 once, then hold 2 and 3 together. You'll see the rotation. Quit holding the keys and then use the arrow keys to move the ball close to one of the red balls. Then press 1 once again, and hold 2 and 3 together. You'll see how the focus point of the rotation changes. Basically this, on a larger scale.

Sorry for going dark. It has been a busy week!

This is impressive. It even works if you make different shapes with the red circles. Looks like you figured out quite a bit.

So, what's the issue now? Interaction? Navigation? :o

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Originally Posted by raxabit

Sorry for going dark. It has been a busy week!

This is impressive. It even works if you make different shapes with the red circles. Looks like you figured out quite a bit.

So, what's the issue now? Interaction? Navigation? :o

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Thanks!

The problem is that the process breaks apart after a while. It doesn't keep its "Shape" if that makes sense. Once a full rotation is done (after moving your position a few times) they are misaligned. Multiply that by more rotations and the more out of alignment they get.

Attachment 26906

I can't even get through a full rotation without the blocks becoming completely broken apart. My guess is that the math is not exact enough between the recalculations.

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Originally Posted by Hezmania

Thanks!

The problem is that the process breaks apart after a while. It doesn't keep its "Shape" if that makes sense. Once a full rotation is done (after moving your position a few times) they are misaligned. Multiply that by more rotations and the more out of alignment they get.

Attachment 26906

I can't even get through a full rotation without the blocks becoming completely broken apart. My guess is that the math is not exact enough between the recalculations.

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I won't be able to check until tomorrow at the earliest, but did you set it up for floating point numbers?

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Originally Posted by raxabit

I won't be able to check until tomorrow at the earliest, but did you set it up for floating point numbers?

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Dumb question, but how do I check? I'm using alterable values for this. I assumed it had a limit to floating numbers.

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Originally Posted by Hezmania

Dumb question, but how do I check? I'm using alterable values for this. I assumed it had a limit to floating numbers.

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See if you have a decimal in your stuff. If not, multiply everything by 1.0. It turns out that you didn't, but adding it in didn't make a difference.

I've been working on a project that does radius stuff for a stage selection screen. Things would gradually lose their place the more they would rotate. My solution was to have the angle snap back to zero if the angle was greater than 360 - rotation speed. Try something like that.

Edit: Forgot to add that you have to be exact in your rotation speed. Something that can be multiplied by an integer to reach 360.

Instead of using "orbit" rotation, you most likely need some form of 2d transformation:

https://academo.org/demos/rotation-about-point/
https://www.tutorialspoint.com/compu...sformation.htm

A quick example of the math:

Attachment 26923

you'll need to adjust how the origin is calculated to suit your needs.

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Originally Posted by casleziro

A quick example of the math:

Attachment 26923

you'll need to adjust how the origin is calculated to suit your needs.

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This looks interesting. It's going to be fun messing around with it. :pacman:

anyone have the correct surface.mfx file for that tutorial? Mines saying I need the unicode version even though I have it.

the surface isn't relevant to the example: Attachment 26996

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Originally Posted by casleziro

the surface isn't relevant to the example: Attachment 26996

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This MIGHT work, moving the stage around the object opposed to him moving around the stage. Ill post back seeing what I find.

I feel like I'm SO CLOSE. I didn't modify much from the example casleziro provided. But Its closer. When the object moves, the stage seems to do some wonky stuff when in any degree but 0. I attached my progress.