Problem with aligning mesh to world (normals)

BlitzMax Forums/MiniB3D Module/Problem with aligning mesh to world (normals)

Robert Cummings

(Posted 2010) [#1]

Hi,

I have a round ish world like super mario galaxy, and my little man needs to basically align to whatever he walks on. I use linepick from the little man to the middle of the world then move him to the middle of the world. This works but I can't figure out how to align him to it and AlignToVector simply isn't working...

I searched the forums and AlignToVector isn't implimented in minib3d (I will be using iMini eventually)

So does anyone have the basic code to align a mesh pitch and yaw, to normals?

Thanks a lot

Robert Cummings

(Posted 2010) [#2]

This is exactly what I want to do (click to play flash demo)

http://pv3d.org/2008/11/29/using-slerp-to-move-around-a-sphere/

Problem is I can't really use quats or custom code as I need to make the pc/mac version compatible with iminib3d...

Last edited 2010

jkrankie

(Posted 2010) [#3]

http://www.gamasutra.com/view/feature/3593/games_demystified_super_mario_.php

b3d code included on seconde page!

Robert Cummings

(Posted 2010) [#4]

hi,

my own code is almost identical, except AlignToVector does not work in iminiB3D so i need to demystify aligntovector :)

thanks for the post though, it proves I am on the right track!

Robert Cummings

(Posted 2010) [#5]

Just need to get a simple version of AlignToVector (2) working on C++ and blitzmax (which means no hacked stuff with matrixes)

This is what I have:

Function Align(entity:TEntity, vx:Float, vy:Float, vz:Float)
	Local pitch#=Abs(EntityPitch(entity))
	Local yaw#=Abs(EntityYaw(entity))

	Local dest_pitch#=Abs(ATan2(vz#,vy#))
	Local dest_roll#=Abs(-ATan2(vx#,vy#))

	RotateEntity(entity, pitch#, yaw#, roll#)
End Function

But unfortunately at upside down angles it has wrong normals or something as it flips. Help please?

Last edited 2010

jkrankie

(Posted 2010) [#6]

Ah, well maybe Warners minib3d version will help? It's got matrices and aligntovector as i recall. It's in the code archives i think.

Cheers
Charlie

Robert Cummings

(Posted 2010) [#7]

Here is si's version but its broken/borked when upside down of the planetoid.

http://www.blitzbasic.com/Community/posts.php?topic=65425