Hi Josef,
Hi,
I'm a new member of this list: hi everybody!
I'm working on an HDR shader program and need to acces textures in
Vertex Shader. I saw here
(http://download.nvidia.com/developer/Papers/2004/Vertex_Textures/Vertex_Textures.pdf)
that it is possible with Nvidia Extension NV_vertex_program3 available
since GeForce 6xxx.
Since I must use this Shader in OpenSG I would like to know if it will
work loading it.
just looked into the pdf if I'm not wrong this should work. Adding the
line "OPTION NV_vertex_program3;" to the vertex shader should do the trick.
Another question is: to be able to use this extension, texture has to
be bound using the standard texture calls (GL_TEXTURE_2D) but
currently only the
GL_LUMINANCE_FLOAT32_ATI and GL_RGBA_FLOAT32_ATI formats are
supported for vertex textures. Is it possible to use this format in OpenSG?
You can change the internal format of a texture with
textureChunk->setInternalFormat(GL_LUMINANCE_FLOAT32_ATI);
Andreas
Did anybody already use this extension?
--
Josef Grunig
www.blending-life.org
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