In this part of the tutorial, I will be showing you how to extend the track and create all of the loops, twists, and turns that make a roller coaster a ride instead of just a flat track.
This is the finished result of this tutorial:
First, let's add a Path Curve (Shift A - Curve - Path). Now go into Edit Mode (Tab), and move the vertices over to the right a little bit (G - X - 2). Tab back into Object Mode, and select the roller coaster track piece (Right Click). Scale it down (S - 0.25), and click on the Modifiers button on the right.
Select 'Add Modifier' and choose 'Array' from the drop-down menu. Under 'Relative Offset' set the X value to 0, and the Z value to 1. You'll now notice that if you raise the 'Count' number, the track will get longer. This is what we want, but right now the mesh won't deform with the path curve. To fix this, add a Curve Modifier on your track. Under 'Object', type in the name of your curve (or click on the box, and select your curve from the drop-down menu). Your Modifier setup should now look like this:
Now if we select our path curve (Right Click the Curve), go into Edit Mode (Tab), right click one of the vertices to select it, and move it around (G), the track should follow it. You can mess around with it for a little while, but don't stretch it too far, or it will mess up the mesh.
Now modify your path Curve to create the track. Remember, Right Click to select, G to move, R to rotate, E to extrude. Don't just move it around in the top view (7); make sure you view it from the front (1) and side views (3) as well. Keep in mind that we're working with 3 dimensions, not 2. Once you're finished, simply raise the Count on the Array Modifier until you have enough track pieces on. You may need to resize the track pieces a little in order for them to fit well on the track.
And that's all for this part of the tutorial! Congrats on completing it, and I hope you'll read the rest of the series when the other parts come out. If you have any questions, comments, or problems, post them in the comments below. Thanks for reading!