Hi,
unfortunately, that did not help. :-(
my driver (I think, you mean the graphics driver) is the latest nvidia
driver.
I found in another forum a hint, that rendering to float textures might
only work, if the texture format is set to
GL_FLOAT_RGBA32_NV. But OpenSG 1.6 can't handle this. Now I use
OSG_FLOAT32_IMAGEDATA for the image and GL_RGBA32F_ARB for the texture.
Is there perhaps another way to solve my problem?
bye
Oliver
Dirk Reiners schrieb:
Hi Oliver,
On Thu, 2005-10-06 at 18:16 +0200, Oliver Kutter wrote:
Hi all,
I want to do some general purpose computation with shader and want to do
some render-to-texture. The result texture is a 16bit float or 32bit
float texture. I use a framebuffer object which holds the float texture
to render to. Can I render float values to that texture with a shader?
Now, when I want the shader to store a value into the texture (with
gl_FragColor), which is much bigger than 1.0 (e.g. 50.0), the result in
the texture is only 1.0 and not 50.0!
Can anyone help me?
By default OpenGL clamps colors to [0..1]. The ARB_color_buffer_float
extensions adds a new function glClampColorARB(), that can be used to
explicitly turn it on and off. But the spec says that by default only
colors for fixed-point buffers are clamped.
It sounds like that's not what you're seeing, so maybe your driver has a
problem there (or you're not actually getting a float FBO). You can try
setting it explicitly using that function, and see if that helps.
Yours
Dirk
-------------------------------------------------------
This SF.Net email is sponsored by:
Power Architecture Resource Center: Free content, downloads, discussions,
and more. http://solutions.newsforge.com/ibmarch.tmpl
_______________________________________________
Opensg-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensg-users
-------------------------------------------------------
This SF.Net email is sponsored by:
Power Architecture Resource Center: Free content, downloads, discussions,
and more. http://solutions.newsforge.com/ibmarch.tmpl
_______________________________________________
Opensg-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensg-users
