[osg-users] How can I rotate a image
Hello, I would like rotate a image. Because I want to rotate the separate images from my sky box. I think it is difficult to change the texture coordinates of my sphere. I my idea is to rotate the images at the beginning. Example ::osg::Image* image = osgDB::readImageFile(c_posX.Filename); // rotate image _cubeMap-setImage(::osg::TextureCubeMap::POSITIVE_X, image); I hope someone can help me. Cheers Martin -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How can I rotate a image
what do you mean by rotating an image? Could you tell what you are actually trying to do? More info you provide more chances to get some advice -Nick 2010/9/7 Martin Großer grosser.mar...@gmx.de Hello, I would like rotate a image. Because I want to rotate the separate images from my sky box. I think it is difficult to change the texture coordinates of my sphere. I my idea is to rotate the images at the beginning. Example ::osg::Image* image = osgDB::readImageFile(c_posX.Filename); // rotate image _cubeMap-setImage(::osg::TextureCubeMap::POSITIVE_X, image); I hope someone can help me. Cheers Martin -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How can I rotate a image
Ok, also I have create a sky box like the sky box in the vertexprogramm example of osg. But in my scene the up vector is in the z direction and not in the y direction. Now I have rotate my sky box 90 degrees around the x axis. Is it understandable? But now, the images on the sky box are in the wrong orientation. For example the image in the positiv x direction is 90 degrees rotated. And I want to correct this rotation. Is it understandable? I am not sure. Cheers Martin Original-Nachricht Datum: Tue, 7 Sep 2010 14:57:24 +0400 Von: Trajce (Nick) Nikolov nikolov.tra...@gmail.com An: OpenSceneGraph Users osg-users@lists.openscenegraph.org Betreff: Re: [osg-users] How can I rotate a image what do you mean by rotating an image? Could you tell what you are actually trying to do? More info you provide more chances to get some advice -Nick 2010/9/7 Martin Großer grosser.mar...@gmx.de Hello, I would like rotate a image. Because I want to rotate the separate images from my sky box. I think it is difficult to change the texture coordinates of my sphere. I my idea is to rotate the images at the beginning. Example ::osg::Image* image = osgDB::readImageFile(c_posX.Filename); // rotate image _cubeMap-setImage(::osg::TextureCubeMap::POSITIVE_X, image); I hope someone can help me. Cheers Martin -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How can I rotate a image
Hi Martin, If you follow the vertexexample closely then then rotation can be simply added (or removed because its already there) to TexMat in TexMatCallback. Look at R matrix in TexMatCallback::operator(). Multiply this R matrix by neccessary rotation. If you don't know what rotation exactly, try 90 or -90 degrees around X, Y, Z axes. After up to 6 tries you will find the one that best suits your need. And you will learn a lot ;-) Wojtek -- From: Martin Großer grosser.mar...@gmx.de Sent: Tuesday, September 07, 2010 1:16 PM To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Subject: Re: [osg-users] How can I rotate a image Ok, also I have create a sky box like the sky box in the vertexprogramm example of osg. But in my scene the up vector is in the z direction and not in the y direction. Now I have rotate my sky box 90 degrees around the x axis. Is it understandable? But now, the images on the sky box are in the wrong orientation. For example the image in the positiv x direction is 90 degrees rotated. And I want to correct this rotation. Is it understandable? I am not sure. Cheers Martin Original-Nachricht Datum: Tue, 7 Sep 2010 14:57:24 +0400 Von: Trajce (Nick) Nikolov nikolov.tra...@gmail.com An: OpenSceneGraph Users osg-users@lists.openscenegraph.org Betreff: Re: [osg-users] How can I rotate a image what do you mean by rotating an image? Could you tell what you are actually trying to do? More info you provide more chances to get some advice -Nick 2010/9/7 Martin Großer grosser.mar...@gmx.de Hello, I would like rotate a image. Because I want to rotate the separate images from my sky box. I think it is difficult to change the texture coordinates of my sphere. I my idea is to rotate the images at the beginning. Example ::osg::Image* image = osgDB::readImageFile(c_posX.Filename); // rotate image _cubeMap-setImage(::osg::TextureCubeMap::POSITIVE_X, image); I hope someone can help me. Cheers Martin -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How can I rotate a image
so yo have a skybox model (probably a dome). and you want to render something in cube map and apply that to the skybox, correct? -Nick 2010/9/7 Martin Großer grosser.mar...@gmx.de Ok, also I have create a sky box like the sky box in the vertexprogramm example of osg. But in my scene the up vector is in the z direction and not in the y direction. Now I have rotate my sky box 90 degrees around the x axis. Is it understandable? But now, the images on the sky box are in the wrong orientation. For example the image in the positiv x direction is 90 degrees rotated. And I want to correct this rotation. Is it understandable? I am not sure. Cheers Martin Original-Nachricht Datum: Tue, 7 Sep 2010 14:57:24 +0400 Von: Trajce (Nick) Nikolov nikolov.tra...@gmail.com An: OpenSceneGraph Users osg-users@lists.openscenegraph.org Betreff: Re: [osg-users] How can I rotate a image what do you mean by rotating an image? Could you tell what you are actually trying to do? More info you provide more chances to get some advice -Nick 2010/9/7 Martin Großer grosser.mar...@gmx.de Hello, I would like rotate a image. Because I want to rotate the separate images from my sky box. I think it is difficult to change the texture coordinates of my sphere. I my idea is to rotate the images at the beginning. Example ::osg::Image* image = osgDB::readImageFile(c_posX.Filename); // rotate image _cubeMap-setImage(::osg::TextureCubeMap::POSITIVE_X, image); I hope someone can help me. Cheers Martin -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- GMX DSL SOMMER-SPECIAL: Surf Phone Flat 16.000 für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How can I rotate a image
::ABSOLUTE_RF);
camera-setName(ENVIRONMENT_CAMERA);
camera-setUpdateCallback( new UpdateEnvironmentCameraNodeCallback(
id[osg::TextureCubeMap::POSITIVE_Y].first,
id[osg::TextureCubeMap::POSITIVE_Y].second,
mViewer-getView(0)-getCamera()) );
mEnvironmentGroup-addChild(camera);
}
// back face
{
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setViewport(new osg::Viewport(0, 0, tex_width, tex_height));
camera-addChild(mSilverLiningGroup.get());
camera-setAllowEventFocus(false);
camera-setProjectionMatrixAsPerspective(90.0f, 1.0, 1, range);
camera-setViewMatrixAsLookAt(osg::Vec3(0,0,0),id[osg::TextureCubeMap::NEGATIVE_Y].first,id[osg::TextureCubeMap::NEGATIVE_Y].second);
camera-setRenderTargetImplementation(renderTargetImplementation);
camera-attach(osg::Camera::COLOR_BUFFER, mEnvironmentCubeMap.get(),
0, osg::TextureCubeMap::NEGATIVE_Y);
camera-setUserData(mViewer-getView(0)-getCamera()-getUserData());
camera-setRenderOrder(osg::Camera::PRE_RENDER);
camera-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
camera-setCullingActive(false);
camera-setClearMask(0);
camera-setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera-setName(ENVIRONMENT_CAMERA);
camera-setUpdateCallback( new UpdateEnvironmentCameraNodeCallback(
id[osg::TextureCubeMap::NEGATIVE_Y].first,
id[osg::TextureCubeMap::NEGATIVE_Y].second,
mViewer-getView(0)-getCamera()) );
mEnvironmentGroup-addChild(camera);
}
// top face
{
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setViewport(new osg::Viewport(0, 0, tex_width, tex_height));
camera-addChild(mSilverLiningGroup.get());
camera-setAllowEventFocus(false);
camera-setProjectionMatrixAsFrustum(-1.0,1.0,-1.0,1.0,1.0,range);
camera-setViewMatrixAsLookAt(osg::Vec3(0,0,0),id[osg::TextureCubeMap::POSITIVE_Z].first,id[osg::TextureCubeMap::POSITIVE_Z].second);
camera-setRenderTargetImplementation(renderTargetImplementation);
camera-attach(osg::Camera::COLOR_BUFFER, mEnvironmentCubeMap.get(),
0, osg::TextureCubeMap::POSITIVE_Z);
camera-setUserData(mViewer-getView(0)-getCamera()-getUserData());
camera-setRenderOrder(osg::Camera::PRE_RENDER);
camera-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
camera-setCullingActive(false);
camera-setClearMask(0);
camera-setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera-setName(ENVIRONMENT_CAMERA);
camera-setUpdateCallback( new UpdateEnvironmentCameraNodeCallback(
id[osg::TextureCubeMap::POSITIVE_Z].first,
id[osg::TextureCubeMap::POSITIVE_Z].second,
mViewer-getView(0)-getCamera()) );
mEnvironmentGroup-addChild(camera);
}
// bottom face
{
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setViewport(new osg::Viewport(0, 0, tex_width, tex_height));
camera-addChild(mSilverLiningGroup.get());
camera-setAllowEventFocus(false);
camera-setProjectionMatrixAsFrustum(-1.0,1.0,-1.0,1.0,1.0,range);
camera-setViewMatrixAsLookAt(osg::Vec3(0,0,0),id[osg::TextureCubeMap::NEGATIVE_Z].first,id[osg::TextureCubeMap::NEGATIVE_Z].second);
camera-setRenderTargetImplementation(renderTargetImplementation);
camera-attach(osg::Camera::COLOR_BUFFER, mEnvironmentCubeMap.get(),
0, osg::TextureCubeMap::NEGATIVE_Z);
camera-setUserData(mViewer-getView(0)-getCamera()-getUserData());
camera-setRenderOrder(osg::Camera::PRE_RENDER);
camera-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
camera-setCullingActive(false);
camera-setClearMask(0);
camera-setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera-setName(ENVIRONMENT_CAMERA);
camera-setUpdateCallback( new UpdateEnvironmentCameraNodeCallback(
id[osg::TextureCubeMap::NEGATIVE_Z].first,
id[osg::TextureCubeMap::NEGATIVE_Z].second,
mViewer-getView(0)-getCamera()) );
mEnvironmentGroup-addChild(camera);
}
mScene-addChild( mEnvironmentGroup.get() );
-Nick
On Tue, Sep 7, 2010 at 3:41 PM, Wojciech Lewandowski
lewandow...@ai.com.plwrote:
Hi Martin,
If you follow the vertexexample closely then then rotation can be simply
added (or removed because its already there) to TexMat in TexMatCallback.
Look at R matrix in TexMatCallback::operator(). Multiply this R matrix by
neccessary rotation. If you don't know what rotation exactly, try 90 or -90
degrees around X, Y, Z axes. After up to 6 tries you will find the one that
best suits your need. And you will learn a lot ;-)
Wojtek
--
From: Martin Großer grosser.mar...@gmx.de
Sent: Tuesday, September 07, 2010 1:16 PM
To: OpenSceneGraph Users osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] How can I rotate a image
Ok, also I have create a sky box like the sky box in the vertexprogramm
example of osg. But in my scene the up vector is in the z direction and not
in the y direction. Now I have rotate my sky box 90 degrees around the x
axis.
Is it understandable?
But now, the images on the sky box
