{"id":1921,"date":"2015-02-11T14:55:40","date_gmt":"2015-02-11T13:55:40","guid":{"rendered":"http:\/\/mechafatnick.co.uk\/?p=1921"},"modified":"2024-09-08T13:16:36","modified_gmt":"2024-09-08T12:16:36","slug":"fatback-makes-game-part-4","status":"publish","type":"post","link":"https:\/\/fatnickindustries.com\/Blog\/2015\/02\/11\/fatback-makes-game-part-4\/","title":{"rendered":"FatNick Makes A Game: Part 4"},"content":{"rendered":"

Crumbs! Quite a lot has happened since I popped up here with part 3<\/a>. SO let’s get stuck in.<\/p>\n

Having got something playable up and running, I decided that I needed to sort the car model out once and for all. There’s no point in carefully balancing a mess of interconnected settings if you’re then going to have to rework them from scratch by changing the proportions of the thing is there?<\/p>\n

But, with so many awesome cars in the world what do you go for? For me there was only ever one: The Toyota MR2 AW-11<\/p>\n

\"make-game\"<\/a><\/p>\n

She’s a beauty isn’t she? The major advantage of the AW11 was that I achieved one of my (minor) childhood ambitions by actually owning one for a while, so I know roughly how they handle. If you’ve got some spare cash and fancy a bit of dangerous, vaguely rusty fun I can definitely recommend them. They might not be the quickest car in the world, but they definitely make up for it in other areas. They’re rear-wheel drive too, so you can terrify your friends by pulling briskly out of side roads. HA<\/p>\n

so, where did I get the model? Well, if you’re feeling flush there are plenty of models you can buy, but I managed to track down a freebie that was given away free with a magazine about a decade ago. Hurrah!<\/p>\n

As is rapidly becoming the norm, however, things did not go exactly to plan. I Replaced the box car with the real model, Positioned everything correctly and, well:<\/p>\n

\"make<\/a>

Ready! Steady! oh.<\/p><\/div>\n

 <\/p>\n

Oops. Turns out that, while you can place the X, Y and (crucially) Z axis anywhere when you’re creating your car in a vacuum, these things matter a lot more when you’re bringing the designs into a program like Unity! I probably should have realised that there was trouble on the horizon when the MR2 was imported in a vertical lift-off-style position. Oh well.<\/p>\n

After downloading Blender (which i have no experience in whatsoever) and trying to reorient the model properly that way, I bodged a solution in Unity. The car itself is now a completely empty object, with the mesh ‘body’ applied to a child object within the car. This means the car itself is set to Unity’s X and Y axis, even if the actual body believes it’s back to front. Hurrah! The car still flipped over horrendously easily, but it ran. Though it did have a slight pull to the left.<\/p>\n

But then….Disaster. erk.<\/p>\n

<\/p>\n

Disaster Strikes! Having placed my MR2 into the action, I decided I wanted to add an extra camera into the max. As with pretty much everything in Unity, this was amazingly easy: I just dragged it onto my car object, dragged it around until it sat nicely on the bonnet, and that was that. The code to enable the code switching looked simple enough too. Essentially, I’d mapped the camera control to button “c” and, when pressed, i wanted it to enable whatever camera wasn’t and enabled and disable whatever camera was already enabled. Simple, really.<\/p>\n

With the script attached, however, things went very weird very quickly. Suddenly, none of the scripts that worked a second before would cooperate, and my shiny new camera script was blathering about an incorrect class (even though JavaScripts in Unity are automatically given a class with their name.) It would appear that my entire project file was completely broken.<\/p>\n

Given the situation, I did the worst thing anyone could probably ever do:I panicked. In my frenzied state, I tried to copy my latest backup over my live file, but ended up mixing my windows and accidentally overwriting my backup with the broken file instead. Yes folks, your author is a colossal moron.<\/p>\n

If you yourself end up in this situation, DO NOT PANIC. It turns out there is a very simple solution: just remove the script that made everything else go a bit fruity, and everything else should return to normal. Oh, and once you’re back to normal, make a back up. And then back up the back up, just to be on the safe side.<\/p>\n

\"make-agme\"<\/a>

Bonnet Cam! Hurrah<\/p><\/div>\n

With my project repaired, I set my sights for the camera script a bit higher: Why just flip between two cameras when you could move ONE camera between two points, in the manner of the rather spiffy sega classic Virtua Racing<\/a>? If it was possible in 1993, it should be possible now, damn it!<\/p>\n

Unfortunately this one turned out to be a bit trickier than I first thought, to be honest with you. I thought I could achieve it with a clever hack of the default ‘smooth follow’ script by using a key to jump between two different ‘height’ and ‘distance’ parameters. Irritatingly, however, my camera wouldn’t move smoothly between the two points, and instead, decided to just sit at a weird height high above the car. I WILL come back to this at some point, but this idea is on the back-burner for now. Instead, I’ve simply reinstated bonnet cam and mapped the cameras to buttons 1 and 2. We’re good to go!<\/p>\n

However, with the cameras set up. I still had some unfinished business with my worryingly unstable car handling. Though the anti-roll bar had worked well on the box car, for some reason my settings weren’t working with the MR2 at all. Possibly because it was significantly larger and wider.<\/p>\n

\"make<\/a>

Here are the box colliders for my MR2. I’m not sure they’re quite right.<\/p><\/div>\n

To resolve my handling problems, I tried a few things. I moved the wheels into the arches (they were sitting too far outside previously,) and altered the spring settings in the wheel colider’s suspension to make the whole thing a bit more solid. I also accidentally made an interesting discovery as far as drfit handling was concerned by messing with the sideways slip integar. I’ll definitely come back to that another day.<\/p>\n

After moving my box coliders around again (i have a feeling they’re still a bit too far\/behind the wheels) I made one final change to the center of gravity (closer to the middle, slightly lower) and I finally seem to have a drivable car again! Hurrah! I’m still not completely happy with it (I’m not sure why it pulls to the left..) but I’ve uploaded the physics test page <\/a>with my progress. Why don’t you have a play?<\/p>\n

(part 5<\/a>)<\/p>\n","protected":false},"excerpt":{"rendered":"

Crumbs! Quite a lot has happened since I popped up here with part 3. SO let’s get stuck in. Having got something playable up and running, I decided that I needed to sort the car model out once and for all. 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