thats why use classes, but if you dont want to go the easy way use unions. There the same things as structs & records but at runtime you can select the feilds. Ie three points or four!
Computer Science Canada Array field of Type |
| Author: | Saad [ Tue May 15, 2007 9:45 pm ] | ||
| Post subject: | Array field of Type | ||
I've been working on a 3D engine and i have all the base procesdures. I have to problems 1. in
Is there a way to change between 3/4 so i can use triangles or quads 2. In a raw file are the vertices based on 4 point polygon or 3 point polygon? Edit: Also to prove im not asking for help on my hw i have attached a simple cube render, use the w a s d keys to rotate Thnx a100 |
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| Author: | DIIST [ Wed May 16, 2007 7:44 pm ] |
| Post subject: | Re: Array field of Type |
thats why use classes, but if you dont want to go the easy way use unions. There the same things as structs & records but at runtime you can select the feilds. Ie three points or four! |
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| Author: | Cervantes [ Wed May 16, 2007 8:46 pm ] |
| Post subject: | RE:Array field of Type |
If you want to work with triangles or quadrilaterals, then the easiest solution would probably be to simply use an array from 1 to 4 like you have, and just ignore the last data point if you want to use triangles. You could include a boolean to determine whether to use a triangle or not. Or better yet, just include an integer variable into your Polygon type that represents the number of vertices. This is a bit wasteful of resources, yes, but if you're only using 3 or 4 sided polygons, it's probably not too terrible. But if you want to squeeze resource management, you should just make two different types. However, thuvs suggestions are great--better. Classes would definitely be good: you could probably make triangle and quadrilateral classes inherit from a generic polygon class. Or, unions sound like they would do very well. I've never seen union used before! It'd be cool if it got put to use. |
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