Hi Robert
thanks a lot, I got it from this mailing list message:
http://www.mail-archive.com/[email protected]/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
<[email protected]> 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_ptr<Vec3Array> 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_ptr<Vec3Array> normalsGround = new Vec3Array;
normalsGround->push_back(Vec3(0.0, 1.0, 0.0));
// creates the texture coordinates array
ref_ptr<Vec2Array> 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_ptr<Image> imgGrass =
osgDB::readImageFile(Utilities::filePath("res/osg/grass.png").toStdString());
// attaches the image to the texture
ref_ptr<Texture2D> 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_ptr<Geometry> 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_ptr<StateSet> stateGroundGeometry = geomGround->getOrCreateStateSet();
stateGroundGeometry->setTextureAttributeAndModes(0, texGround.get(),
StateAttribute::ON);
// creates the geode
ref_ptr<Geode> geoGround = new Geode;
geoGround->addDrawable(geomGround.get());
Thanks a lot in advance!
Best regards
Dominic
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