Car (Sprite) follows (or moves on) the way (path)?

[gameZero]

Hi.

The first thing I want to say is, that I searched the web for this solution, but I found nothing that is good, that can I use.
Maybe I searched with wrong keywords.

On the image you can see a car and a way. I will now, that the car (sprite) follows (or moves on) this way (path).
I made this "way" with Inkscape. I can save the "way" as .svg to get the path.
The car is following the path and changing his direction.



for example the .svg file:

Code: Select all

...
<path
   style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
   d="m 196.47467,414.45085 ... etc."
   id="path2985"
   inkscape:connector-curvature="0" />
...

Has someone a good solution for that?
What are the good keywords for that?

Thank you.

[just4phil]

hi
check the following link and ask the developer of that great game (i play it all day long

http://www.badlogicgames.com/forum/viewtopic.php?f=16&t=7334

cu
phil

[gameZero]

It looks like the Point version.

[Pinkie Swirl]

Search for bèzier curves.

Something like this: http://gamedev.stackexchange.com/questions/5373/moving-ships-between-two-planets-along-a-bezier-missing-some-equations-for-acce

[gameZero]

bèzier curves -> This is one of the keywords that i was looking for. I will search for that and read it.

If somebody has additional good keywords.... Please let us know. Thank you.

[Digoots]

is this any help?

http://www.ijmlc.org/papers/82-A1090.pdf

[gameZero]

It looks like "Waypoint" tutorial.

Page 3 of the .pdf file looks like this: (For someone who needs that. It's flash)
http://www.emanueleferonato.com/2010/06/28/create-a-flash-racing-game-tutorial-artificial-intelligence/

There is a flash animation.

[gameZero]

It's unbelievable that I can't find nothing. I thought that this path thing is important for some game developers.

The best useful thing is still now the Link from "Pinkie Swirl". One of the best part of this tutorial is this here.

This solution is good, because of the speed. The car has than the same speed at the curves.

I tried to do that with inkscape. But without success. I mean, I can draw curves. The problem is, that i can't make the curve nodes distances like in the picture.


There also must be a program for that. I mean making the same distance.

And there must be a simple and perfect solution for that.

[Pinkie Swirl]

In the link i gave you is stated, that you compute these points in your game. So load the curves, then compute the points, save those points and move your cars along this points.

[gameZero]

Yes, I think that's the only way.

I wanted to make it easier.
1. Draw the path with inkscape
2. Save the path
3. Car follows the path