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Is the world matrix called for every scene object?

Started by MarauderX Aug 2, 2006 at 2:22 PM 1 replies 650+ views

Original Post

Aug 2, 2006 at 2:22 PM

I don't know if this is the right place to ask this question, but I'll try anyway.:) I'm using VC++ and Direct3D to create a scene. I read some documents about the projection, view and world matrices, but they confuse me sometimes. There for I want to ask this question: If there are 100 objects in a scene (a few walls, a few chairs, etc.), do I really set the world matrix just before each object so it will be drawn at the location represented by the world matrix? That way I will set the world matrix 100 times per frame, right?

haegarr

Aug 2, 2006 at 2:51 PM

Usually you will set 100 different world matrices for 100 walls each one given in a different local co-ordinate sytem. If you have, say, 4 walls building up a room, and the 4 walls are all given in the same co-ordinate system (e.g. the one of the room), then you need to set-up the belonging world matrix once (but only if you render the 4 wall consecutively, say without any geometry in-between that is given in another local co-ordinate system).

MarauderX

Aug 2, 2006 at 2:58 PM

Thank you very much.

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