Race Car Movement Substitution

Merrie · October 20, 2011 at 4:50 AM

I am working on a little top down racing game but seems the default racecar movement is a bit goofed up. What movement, settings would be suggested to do a race car movement?

The car would be player controlled, and the design would be a cross country style track. Thanks!

Jacob · October 20, 2011 at 6:27 AM

Rather than be bothered to type it all out again, take a look at this: Please login to see this link.

That is how one would do a 360 degree shooting engine. For a racecar engine, it is largely the same. You would just need to replace the angle expression with some "Repeat while -> is pressed, set angle to angle+1" and so on with left. You can put those formulae into fastloops as well, so when you collide with a backdrop you can just set the velocity to velocity*-0.5, which will give a nice bouncing motion off of obstacles. Assuming you hit them straight on, that is. If you have actives you can hit, use the 180+the formula in the link I provided for angles and then set the velocity, so you'll bounce off. This can all be refined of course, and I'm willing to do a more in-depth explanation of each element if you need it.

Hope this helps!

Merrie · October 20, 2011 at 3:57 PM

Jacob thank you very much Ill work with this see what I come up with.

Merrie · October 21, 2011 at 5:13 PM

Bring this topic up again, the race car movement in MMF seems to not be working correctly. I looked up the reference on how to use it in Make Amazing Games in Minutes by Jason and when I try it the car will not move using the arrow keys. Is there additional settings I need to look at or adjust? Thanks!

Jeff · October 21, 2011 at 5:22 PM

If you make a new app
Put an active object on the screen
Set its movement to Race Car

Run it

It doesn't respond to the arrow keys?

Merrie · October 21, 2011 at 6:22 PM

Lets see here ok I made an active object, put the racecar movement on it. If you press the up arrow key it starts to move, if you press the down it comes to a stop (as its suppose to).

Turning does not seem to happen, it just goes in a little circle, but does not 'turn'. Do you need an object with animations to mimic the car turning?

Jeff · October 21, 2011 at 6:40 PM

Ah

Thats how its always been.

If you only wanted it to turn when moving forward or back you could have a couple events.

If car is stopped -- Set rotating speed to 0

If car is not stopped -- Set rotating speed to (how ever fast you want it)

Merrie · October 21, 2011 at 7:40 PM

Hum, alright let me give that a try, thanks Jeff.

Merrie · October 21, 2011 at 9:01 PM

Well no luck, I tried the race car sample from Make Amazing Games in Minutes and that runs perfect. But if I take my own race car model in and set it up like the sample I get odd behavior.

I make sure to set the initial direction to -0 right, and when I load the model I set the movement to running in the frame/graphic editor.

Only other thing I can think of to do is zip up this sample and see if the program Im having can be pinpointed.

Jeff · October 21, 2011 at 10:26 PM

Could it be the hotspot in the graphic?

Without seeing both I can't really say what the difference is but if one works and the other works differently there must be a reason.

Merrie · October 22, 2011 at 8:16 PM

Ok let me check the hotspot good point

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