[ros-users] Dynamic Texture Loading in RVIZ, Dynamic Textures using OGRE

[Josh Faust]

On Fri, Apr 2, 2010 at 2:35 PM, Osiloke Emoekpere <osiloke_e at skuuled.com>wrote:

> Hi,
> *@josh ->* thanks for your reply and sorry for the caps
> Sorry if i appeared to come out strong, i was only trying to highlight the
> part i wanted
> to focus on (did not know i was offending anyone).  The caps thing was of
> no relevance to the
> tone of "my voice".
>

No worries, all caps is usually frowned upon on mailing lists/forums/etc.,
now you know.


>
> i really like the operating system and i'm in the process of loving it.
>
>
Glad to hear it :)


>
>

> like so
> in shape_marker.cpp
> The dummy image is created when shape_marker is created in the constructor
>
>  std::stringstream ss;
> ss << "SHAPETEX-h" << name;
> texName = ss.str();
>  empty_image_.load("no_image.png",
> Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
> * **// Create the texture*
> *     ** **texture_ = Ogre::TextureManager::getSingleton().createManual(*
> * **texName, // name*
> * **Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,*
> * **Ogre::TEX_TYPE_2D,      // type*
> * **256, 256,         // width & height*
> * **0,                // number of mipmaps*
> * **empty_image_.getFormat(),     // pixel format*
> * **Ogre::TU_DYNAMIC_WRITE_ONLY_DISCARDABLE);      // usage; should be
> TU_DYNAMIC_WRITE_ONLY_DISCARDABLE for*
>
> In order to load the image into the texture and then apply it to the shapes
> material,
> i do the following
>
> PLEASE NOTE:
> I also tried the blitfromemory to copy the image data to the texture
> (resulted in some garbled results and later caused a seg error)
>
>
> void ShapeMarker::setTexture(const Ogre::Image &img)
> {
>         //I first deleted the existing texture if there was any
> if (!texture_.isNull())
>   {
>
> Ogre::TextureManager::getSingleton().remove((Ogre::ResourcePtr&)texture_);
>   texture_.setNull();
>  }
> texture_ = Ogre::TextureManager::getSingleton().loadImage(texName,
> Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,img);
>        //Then loaded the texture like so
>        //texture_(new Ogre::Texture());
> textured_=true;
>          /// Testing. Apply Texture to Shape, i may be wrong here
> Ogre::TexturePtr text_or(tex); //i thought copying it makes a difference
>  Ogre::MaterialPtr material_ = *shape_->getMaterial();//get material of
> already existing shape*
> material_->getTechnique(0)->getPass(0)->removeAllTextureUnitStates();
>
> material_->getTechnique(0)->getPass(0)->createTextureUnitState(text_or->getName());
> ROS_INFO("Texture Applied %s", text_or->getName().c_str());
> }
>
> So these where the steps i took to try and create my system
> Any input and criticisms would be highly appreciated.
>

I don't see anything blatantly wrong after a quick look through the code.
Does the "no image" texture also not show up, or just the dynamic one?

If the "no image" texture also doesn't show up, the mesh you're using for
the plane (are you just using a really flat box?) probably doesn't have
texture coordinates on it -- you'd have to add them in a 3d modeling program
or generate coordinates after it's loaded.

Josh
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