RE: [Algorithms] Creating the world matrix

[Steve W. <Ste...@im...>]

> From: Aldo . [mailto:al...@ho...]
>
> I'm looking for a fast way to create the world matrix from 
> the values of pitch, yaw, roll and position(and scaling factor, perhaps), 
> without using a matrix operation for each value.
> I would like to avoid do the folowing
> 
> WorldMatrix = MatrixIdentity();
> 
> MatrixScale(WorldMatrix, scale);
> 
> MatrixTranslate(WorldMatrix, position);
> 
> MatrixRotateX(WorldMatrix, pitch);
> MatrixRotateY(WorldMatrix, yaw);
> MatrixRotateZ(WorldMatrix, roll);
> 
> SetWorldMatrix(WorldMatrix);
> 

In the DirectX help Index select: 3-D Transformations.  It has details on
the matrices used for each method you list. If you want to hard code it into
your app to eliminate un-necessary operations then you'll want to break each
transform operation down to it's components and do the math.

R&R