Hi.
I need to use an buffer to update a texture. I can do it but the bad point is
that my item is a full collored Quad and not an image. The color is the first
color of my buffer.
i can change every things but not the buffer, i receive it as a <unsigned
char*> and i know the width and the height. Is it RGB mode, no alpha.
Could you help me? thanks you a lot !
This is my code to create items:
Code:
//objets from my class
osg::Texture2D* texture_;
//Constructor
osg::Image* im = new osg::Image;
im->allocateImage(1024 , 1024, 1 , GL_RGB, GL_UNSIGNED_BYTE);
texture_ = new osg::Texture2D;
texture_->setDataVariance(osg::Object::DYNAMIC);
texture_->setImage(im);
osg::ref_ptr<osg::Vec3Array> vertex_ = new osg::Vec3Array;
osg::Geometry * g = new osg::Geometry;
g->setVertexArray( vertex_.get() );
float x = 512;
static float zFar = -10000;
vertex_->push_back( osg::Vec3( -x , -x , zFar ) );
vertex_->push_back( osg::Vec3( x , -x , zFar ) );
vertex_->push_back( osg::Vec3( x , x , zFar ) );
vertex_->push_back( osg::Vec3( -x , x , zFar ) );
g->addPrimitiveSet(new osg::DrawArrays( osg::PrimitiveSet::QUADS, 0, 4 ) );
stateset_ = g->getOrCreateStateSet();
stateset_->setTextureAttributeAndModes(0, texture_, osg::StateAttribute::ON);
stateset_->setMode(GL_BLEND,osg::StateAttribute::ON);
stateset_->setRenderingHint(osg::StateSet::OPAQUE_BIN);
osg::Geode* geode = new osg::Geode;
geode->addDrawable(g);
texture_->setImage(im);
This is my code to update texture: (simplified)
Code:
void Background::majTexture(unsigned char* newValue)
{
memcpy(texture_->getImage()->data(), newValue, 1024 * 1024 * 3);
//1024 * 1024 * 3 = height * weight * number of composant for one pixel
}
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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=27008#27008
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