hello!
I m new with openSG.so i apply a 640*480 texture on a 64*40 plane....so i must
respecify the texture coordinates(the 640*480 image will be "transformated"
by openSG in a 1024*512 image...I think).But the result is an image wich is
symetric by a diagonal of my plane...The image is red with a yellow line on the
top,so in the result,the line is on the diagonal.
Can someone tell me what i made wrong?
GeometryPtr Plan= makePlaneGeo (64,48,1,1);
(...)
img = Image::create();
img->set(Image::OSG_RGBA_PF,640,480,1, 1, 0, 0, tab_rgba);
texc = TextureChunk::create();
blendc = BlendChunk::create();
cmat = ChunkMaterial::create();
beginEditCP(texc);
texc->setImage (img);
texc->setScale (false);
endEditCP(texc);
beginEditCP(blendc);
blendc->setSrcFactor ( GL_SRC_ALPHA );
blendc->setDestFactor ( GL_ONE_MINUS_SRC_ALPHA );
endEditCP(blendc);
beginEditCP(cmat);
cmat->addChunk(texc);
cmat->addChunk(blendc);
endEditCP(cmat);
//So,I respecify the texture coordinates
//because the 640*480 image will be "transformated"
//by openSG in a 1024*512 image...iI think
GeoTexCoords2fPtr texcoords = GeoTexCoords2f::create();
beginEditCP(texcoords);
texcoords->addValue(Vec2f(0,0));
texcoords->addValue(Vec2f(640.0/1024.0,480.0/512.0));
texcoords->addValue(Vec2f(0,480.0/512.0));
texcoords->addValue(Vec2f(640.0/1024.0,0));
endEditCP(texcoords);
beginEditCP(Plan);
Plan->setTexCoords(texcoords);
Plan->setMaterial(cmat);
endEditCP(Plan);
(...)
thank you in advance
Olivier
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