Re: [osg-users] Texture wrapping for a geometry object
Hi Robert thanks a lot, I got it from this mailing list message: http://www.mail-archive.com/osg-us...@openscenegraph.net/msg11209.html I will try the texture coordinates scaling. But just for interesting, how would the texture matrix work, do you have some basic code snippet? Regards Dominic Robert Osfield schrieb: Hi Dominc, I don't know where you might have got the impression that you can't set up texture repeats with geometry - you just using texture coordinates beyond the 0.0 to 1.0 range and you'll get repeats. Another way is to use a texture matrix to up the tex coords from 0.0 to 1.0 range to what you want. Robert. On Sun, Nov 22, 2009 at 3:28 PM, Dominic Stalder dominic.stal...@bluewin.ch wrote: Hi there I would like to wrap (repeated) my texture image on a geometry object. I read somewhere, that this is not possible directly on the geometry, but how can I do it otherwise? Here is my code: /* * creates the ground geometry */ // creates the vertices array ref_ptrVec3Array verticesGround = new Vec3Array; verticesGround-push_back(Vec3(-WORLD_INFINITY, 0.0, -WORLD_INFINITY)); // back left verticesGround-push_back(Vec3(WORLD_INFINITY, 0.0, -WORLD_INFINITY)); // back right verticesGround-push_back(Vec3(WORLD_INFINITY, 0.0, WORLD_INFINITY)); // front right verticesGround-push_back(Vec3(-WORLD_INFINITY, 0.0, WORLD_INFINITY)); // front left // creates the normal array ref_ptrVec3Array normalsGround = new Vec3Array; normalsGround-push_back(Vec3(0.0, 1.0, 0.0)); // creates the texture coordinates array ref_ptrVec2Array texCoordGround = new Vec2Array; texCoordGround-push_back(Vec2(0.0, 0.0)); texCoordGround-push_back(Vec2(1.0, 0.0)); texCoordGround-push_back(Vec2(1.0, 1.0)); texCoordGround-push_back(Vec2(0.0, 1.0)); // loads the texture image ref_ptrImage imgGrass = osgDB::readImageFile(Utilities::filePath(res/osg/grass.png).toStdString()); // attaches the image to the texture ref_ptrTexture2D texGround = new Texture2D; texGround-setDataVariance(Object::DYNAMIC); texGround-setWrap(Texture::WRAP_S, Texture::REPEAT); texGround-setWrap(Texture::WRAP_T, Texture::REPEAT); texGround-setImage(imgGrass.get()); // releases the image after applying texGround-setUnRefImageDataAfterApply(true); // creates the geometry ref_ptrGeometry geomGround = new Geometry; geomGround-setVertexArray(verticesGround.get()); geomGround-setNormalArray(normalsGround.get()); geomGround-setTexCoordArray(0, texCoordGround.get()); // adds the primitive set to the geometry geomGround-addPrimitiveSet(new DrawArrays(PrimitiveSet::QUADS, 0, 4)); // enables all the necessary states for the ground geometry node ref_ptrStateSet stateGroundGeometry = geomGround-getOrCreateStateSet(); stateGroundGeometry-setTextureAttributeAndModes(0, texGround.get(), StateAttribute::ON); // creates the geode ref_ptrGeode geoGround = new Geode; geoGround-addDrawable(geomGround.get()); Thanks a lot in advance! Best regards Dominic ___ 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 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Texture wrapping for a geometry object
On 23/11/09 10:09 AM, Dominic Stalder wrote: I will try the texture coordinates scaling. But just for interesting, how would the texture matrix work, do you have some basic code snippet? osg::TexMat provides a matrix and any texture coordinates you specify will be multiplied by that. The matrix can translate, scale, and rotate the texture coordinates. For example if you specify a x2 scaling matrix and the texture coordinates are 0..1 then that has the same effect as if you specified texture coordinates 0..2. Hope this helps, /ulrich ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Texture wrapping for a geometry object
Hi everybody thanks for the help. It's really that easy, but I didn't see the hint ;-) Sorry for that. Now I just set the value of the geometry width instead just 1.0. Cheers, Dominic -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20132#20132 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Texture wrapping for a geometry object
Hi Dominc, I don't know where you might have got the impression that you can't set up texture repeats with geometry - you just using texture coordinates beyond the 0.0 to 1.0 range and you'll get repeats. Another way is to use a texture matrix to up the tex coords from 0.0 to 1.0 range to what you want. Robert. On Sun, Nov 22, 2009 at 3:28 PM, Dominic Stalder dominic.stal...@bluewin.ch wrote: Hi there I would like to wrap (repeated) my texture image on a geometry object. I read somewhere, that this is not possible directly on the geometry, but how can I do it otherwise? Here is my code: /* * creates the ground geometry */ // creates the vertices array ref_ptrVec3Array verticesGround = new Vec3Array; verticesGround-push_back(Vec3(-WORLD_INFINITY, 0.0, -WORLD_INFINITY)); // back left verticesGround-push_back(Vec3(WORLD_INFINITY, 0.0, -WORLD_INFINITY)); // back right verticesGround-push_back(Vec3(WORLD_INFINITY, 0.0, WORLD_INFINITY)); // front right verticesGround-push_back(Vec3(-WORLD_INFINITY, 0.0, WORLD_INFINITY)); // front left // creates the normal array ref_ptrVec3Array normalsGround = new Vec3Array; normalsGround-push_back(Vec3(0.0, 1.0, 0.0)); // creates the texture coordinates array ref_ptrVec2Array texCoordGround = new Vec2Array; texCoordGround-push_back(Vec2(0.0, 0.0)); texCoordGround-push_back(Vec2(1.0, 0.0)); texCoordGround-push_back(Vec2(1.0, 1.0)); texCoordGround-push_back(Vec2(0.0, 1.0)); // loads the texture image ref_ptrImage imgGrass = osgDB::readImageFile(Utilities::filePath(res/osg/grass.png).toStdString()); // attaches the image to the texture ref_ptrTexture2D texGround = new Texture2D; texGround-setDataVariance(Object::DYNAMIC); texGround-setWrap(Texture::WRAP_S, Texture::REPEAT); texGround-setWrap(Texture::WRAP_T, Texture::REPEAT); texGround-setImage(imgGrass.get()); // releases the image after applying texGround-setUnRefImageDataAfterApply(true); // creates the geometry ref_ptrGeometry geomGround = new Geometry; geomGround-setVertexArray(verticesGround.get()); geomGround-setNormalArray(normalsGround.get()); geomGround-setTexCoordArray(0, texCoordGround.get()); // adds the primitive set to the geometry geomGround-addPrimitiveSet(new DrawArrays(PrimitiveSet::QUADS, 0, 4)); // enables all the necessary states for the ground geometry node ref_ptrStateSet stateGroundGeometry = geomGround-getOrCreateStateSet(); stateGroundGeometry-setTextureAttributeAndModes(0, texGround.get(), StateAttribute::ON); // creates the geode ref_ptrGeode geoGround = new Geode; geoGround-addDrawable(geomGround.get()); Thanks a lot in advance! Best regards Dominic ___ 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
