I am a computer engineering/applied computer science student in his final year. My main focus is software design and implementation ('programming'), but I also have hobby-experience doing some Blender 3D modeling and level design for various games!

Report article RSS Feed Adventures in the world of Unreal

Posted by Metalspy on Aug 13th, 2013

The last couple of weeks I have been busy learning how to work with UnrealScript/UDK. Yesterday I have made a 'simple' "place an object where you click" testmechanic. I write 'simple' between quotes because it took me quite a while before I understood what the values I was working with actually meant. For those familiar with UnrealScript: I wasn't sure what the Canvas.DeProject function out-params, WorldOrigin and WorldDirection, were supposed to be/do, which made doing a decent Trace impossible. Thinking my world's orientation was different than it actually was didn't help too much either when I was trying to figure out what I was doing wrong. Anyway, here are three screenshots showing the progress I made yesterday, because after hours and hours staring at the debug-log I am proud of what I eventually have accomplished, even though it is nothing too fancy or original.

First try - a mess!
1. First results - Clicking all over the screen resulted only in different rotations of the placed object, the object is always placed at coordinates (0,0,0). Still not sure why the rotation changed, I didn't set it anywhere myself..

Better, but not quite there yet
2. This looks better, but the only way to change the location of the object-creation was by moving around the camera: the object always spawned at the center of the camera, no matter where on the screen I clicked.

Final result
3. Final result - The objects are placed exactly where I click, as demonstrated by the mousecursor and the object at the same location.

I probably could have downloaded the code from the internet, but I did create and figure this out all by myself because it is supposed to be a learning experience. Downloading code != learning.

That was all for today to be honest. Just being glad I solved the problem and sharing it with the world! :) I will probably post some more about this UDK project in the future, because believe it or not: this is me working towards an actual game prototype (and preparing for my internship, where I will be using UDK as well).

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