GL_BLEND if the image was translucent and tested it with
OpenSceneGrpaph-Data/Images/trree0.rgba and it worked fine. The
modified file is attached.
#include <osgViewer/Viewer>
#include <osg/Texture2DArray>
#include <osgDB/ReadFile>
#include <osg/Geometry>
#include <osg/Uniform>
#include <iostream>
const char* vert =
"#version 330 compatibility\n"
"out vec4 coord;\n"
"void main() {\n"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" coord = gl_MultiTexCoord0;\n"
"}\n";
const char* frag =
"#version 330 compatibility\n"
"in vec4 coord;\n"
"out vec4 color;\n"
"uniform sampler2DArray tex;\n"
"void main() {\n"
" color = texture(tex, vec3(coord.st,0));\n"
"}\n";
int
main(int argc, char** argv)
{
osg::ArgumentParser arguments(&argc,argv);
// create a viewer:
osgViewer::Viewer viewer(arguments);
if (argc<=1) return 1;
osg::Image* image = osgDB::readImageFile(argv[1]);
osg::Texture2DArray* tex = new osg::Texture2DArray();
tex->setTextureSize(image->s(), image->t(), 1);
tex->setFilter(tex->MIN_FILTER, tex->LINEAR_MIPMAP_LINEAR);
tex->setFilter(tex->MAG_FILTER, tex->LINEAR);
tex->setImage(0, image);
osg::Geometry* geom = new osg::Geometry();
osg::Vec3Array* verts = new osg::Vec3Array();
verts->push_back(osg::Vec3(-1,-1,0));
verts->push_back(osg::Vec3( 1,-1,0));
verts->push_back(osg::Vec3( 1, 1,0));
verts->push_back(osg::Vec3(-1, 1,0));
geom->setVertexArray(verts);
osg::Vec2Array* tc = new osg::Vec2Array();
tc->push_back(osg::Vec2(0,0));
tc->push_back(osg::Vec2(1,0));
tc->push_back(osg::Vec2(1,1));
tc->push_back(osg::Vec2(0,1));
geom->setTexCoordArray(0, tc);
geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS, 0, 4));
osg::StateSet* s = geom->getOrCreateStateSet();
if (image->isImageTranslucent())
{
s->setMode(GL_BLEND, osg::StateAttribute::ON);
}
s->setTextureAttribute(0, tex);
s->addUniform(new osg::Uniform("tex",0));
osg::Shader* VS = new osg::Shader(osg::Shader::VERTEX, vert);
osg::Shader* FS = new osg::Shader(osg::Shader::FRAGMENT, frag);
osg::Program* program = new osg::Program();
program->addShader(VS);
program->addShader(FS);
s->setAttribute(program);
viewer.setSceneData(geom);
return viewer.run();
}
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
