Tag Archive | Game

Getting used to Ogre 3D

I’ve been using Ogre for a few days now, just going through the tutorials on the website and messing around, and I really like it. After the pain of programming a uni project directly in OpenGL, I was kind of dreading how much work it would be just to get a model into a real-time renderer. As an analogy, imagine wanting to cook a nice meal, and having to build the oven first – you know what you want the oven to be able to do, but actually going about it is a slow and painful process.

However, with Ogre 3D, the oven is built for you! If I don’t want to, I never need to go into quaternion maths, building a scene hierarchy system, frame listeners or any of the other complex engine necessities. After years of using 3dsmax, I found the Ogre workflow really simple and straightforward. There are lots of nice features and it seems robust. It is not too bloated in my opinion either – although the set-up process was rather long. The tutorials on the wiki website are really easy to read and learn from, although one was unable to compile on my computer. http://www.ogre3d.org/tikiwiki/tiki-index.php?page=Tutorials

Here are some screenshots of the demo scene I just made (having done Tutorials 1-6), using some example media and my own ships/ space-station:

You can read the code I wrote to create the scene shown in the screenshots here: http://www.evernote.com/shard/s121/sh/58d7c731-1507-4e4d-9e3d-8c9b14ef2005/71b5b5d250ca72c7173b8478e5b66395 – there’s exponential fog, texture shadows, a spotlight, a skydome, and some C++ structures like for loops to get me back into the flow! If you know some C++ and are somewhat familiar with making 3D graphics, I think the code’s pretty short and easy to read.

The structure of getting models into the engine takes some getting used to. There is a human-readable .scene file (which can be exported from Max, Maya, Blender, etc) and a dotSceneParser class. What this means is that scenes can be altered from within the .scene file, .mesh files and .material files without you having to recompile the source code. It’s amazing that you can use Max as your game editor almost, placing lights and objects, without having to constantly recompile your C++ code!

Here’s a screenshot of the “Easy Ogre Exporter” open-source Max plugin, http://www.ogre3d.org/tikiwiki/Easy+Ogre+Exporter, which is a really nice and simple way to get max scenes into the .scene format:

I had a really enjoyable few days taking it slow and learning all about Ogre – I don’t want to get disenfranchised by jumping in to making the game too quickly and doing everything wrong. Also I bought a load of expensive computer parts to make a new system, which will speed some things up a lot compared to working on my laptop – compiling and running the game takes about a minute, and those minutes sure add up. Hopefully I’ll start making the actual game soon though.

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The first step in a long journey!

Hello.

This blog is an account of developing a 3D PC game. I intend to work on it (the blog and the game) over the summer, which for me starts in 3 weeks when my exams finish. Blog posts will probably not be regular – hopefully that will be due to my addiction to developing the game rather than a lack of progress!

The game is a smuggling in space simulation. The majority of the game will be flying a spaceship in 3rd person. The controls will be keyboard and mouse based, and intricate enough to be enjoyable to fly and fight. Visual design will be semi-realistic futuristic (like mass effect, star wars, sins of a solar empire) but as I am only one person, the 3d art quality may have to be sacrificed to allow me to concentrate on programming.

The programming will take up the majority of this blog and my time. I would like to use C++, but regarding game engines/ APIs, I haven’t made a choice yet. I am tempted to write systems implementing OpenGL, but this may be too much work, so I will look at other engines as well. I don’t have much experience at all, and am trying to get to grips with this book, which is fantastic but a slow read for me: http://www.amazon.com/Game-Programming-Gems-Series-v/dp/1584502339.

Please get in touch if you have anything to say, including ideas for features, opinions, or just telling me I’m doing it wrong! Thanks for checking this out,

Patrick