hello.
i have a question.
billboard does a transformation to a geometry, so it always faces the camera.
mm… this might be a silly question, but is there something like a billboard for a texture?
wouldn´t it be nice, to have an object with an arbitrary surface in the world, and the texture always faces the camera?
in cinema4d there is this thing called frontal mapping.
is there something like this in vvvv?
thanks
aiv
it’s possible, but it’s really tricky shader technique stored in here http://vvvv.org/documentation/how-to-project-on-3d-geometry
what about sprite-(dx9) in conjunction with billboard? or do i understand your needs?
@anthokio: which shader technique are you referring to? i cannot find any shader techniques descibed there.
@dEp: sprite doesn´t handle the geometry though… the idea would be to texture a mesh, and in specific perspective (ViewTransform or ProjectionTransform) the texture would look undistorted. imagine a textured pyramide, and you look at it from above. the idea is that you see your undistorted texture.
it seems to be quite a mathematical thing. or maybee it will come down to homography…
http://vvvv.org/tiki-download_file.php?fileId=1843 projected texture
this shader is awesome. it is very tricky though, but it does the trick.
thank you again antokhio.
i actually knew this example, but apparently i didn’t pay attention to all the details. i never stop learning.
also see Projector (EX9.Effect)
very nice.