Hi Johannes,
I may be wrong but I have read Texture2DArry spec recently and I remember
that clamp to border is not fully supported by this extension. Google and
Look at Texture2DArray extension spec. You may need to switch to clamp to
edge.
Cheers,
Wojtek
--------------------------------------------------
From: "Johannes Schüth" <[email protected]>
Sent: Sunday, October 04, 2009 11:19 PM
To: <[email protected]>
Subject: [osg-users] Texture Wrapping Texture2DArray (Clamping doesn't work)
Hi,
i have just changed my code to use Texture2DArray instead of texture2D's.
I works fine but i have one problem. My texture is not clamped to the
border.
This is my code:
Texture2DArray:
Code:
osg::Texture2DArray* textureArray = new osg::Texture2DArray;
textureArray->setFilter(osg::Texture2DArray::MIN_FILTER,osg::Texture2DArray::LINEAR);
textureArray->setFilter(osg::Texture2DArray::MAG_FILTER,osg::Texture2DArray::LINEAR);
textureArray->setWrap(osg::Texture::WRAP_S,
osg::Texture::CLAMP_TO_BORDER);
textureArray->setWrap(osg::Texture::WRAP_T,
osg::Texture::CLAMP_TO_BORDER);
textureArray->setWrap(osg::Texture::WRAP_R,
osg::Texture::CLAMP_TO_BORDER);
Vertex Shader:
Code:
varying vec4 vPos;
void main()
{
vPos = gl_Vertex;
gl_Position = ftransform();
gl_FrontColor = gl_Color;
}
Fragment Shader:
Code:
#version 120
#extension GL_EXT_gpu_shader4 : enable
uniform sampler2DArray projectionMaps;
varying vec4 vPos;
void main()
{
vec4 coords = gl_TextureMatrix[5] * vPos;
vec4 dividedCoord = coords / coords.w ;
vec4 color = texture2DArray(projectionMaps,
vec3((dividedCoord.st*vec2(0.5,0.5)+vec2(0.5,0.5)), 1));
gl_FragColor=color* gl_Color;
}
I add two images and one custom TexMat.
Is there a special way to enable clamping or might this be a bug in any
form?
Thank you!
Cheers,
Johannes
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=17857#17857
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