• Advertisement


This topic is now archived and is closed to further replies.

Billboard-Camera alignment matrices (a problem relating to them...)

This topic is 5408 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I know I can use the inverse of my view matrix to keep my billboard poly''s perfectly aligned towards the camera in my scene, but what do I do if I only want to keep the facing pointed at the camera, without rotating the billboard along its edges - i.e. if the camera spins then the billboard will seem rotated on 2-dimensions to the user, but the image will always be visible. I need to do this because my game is a space sim, so if an explosion animation is playing I want it to always face the player, but obviously if they did something like fly in a spin towards it the explosion animation should not remain perfectly orientated to their point of view. What kind of matrix should I be using for this, or what changes should I be making to the matrix I have (i.e. the inverse of the view matrix - yes I do know and do use the transpose to save on the cost of calculating a determinant)? Any help is greatly appreciated. ##UnknownPlayer##

Share this post

Link to post
Share on other sites

  • Advertisement