rotation

[hog]

Does anyone have any pointers, help on how to rotate in 3d?

Problem:

I have a square made of 2 primitives and can successfully display them with a texture of a walking man.

I want to be able to simply rotate the square clockwise but can't seem to suss it. The SDK help is of little or no use???

 

[Darc]

you need to use Matrices,

d3dDevice.Transform.World = RotateY(angle)
d3dDevice.Transform.World = RotateX(angle)
d3dDevice.Transform.World = RotateZ(angle)

Those will rotate the object around the origin but they are absolute in that if angle doesn't change, neither will the rotation, so do something like:

Public Const Speed As Long = 2000 'Decrease SPEED to go faster

Dim angle As Single = PI / SPEED 

Private Sub DoMatrices()
    d3dDevice.Transform.World = Matrix.Identity
    d3dDevice.Transform.World = Matrix.RotateZ(angle)
    angle += PI / SPEED
End Sub

now just call that everytime before you draw

 

[hog]

Nice

A great sample, thnx Darc

 

[Darc]

np