Difference between revisions of "Creating a sub image"
From CEGUI Wiki - Crazy Eddie's GUI System (Open Source)
m (CodeSnippets/CreateSubImage moved to CreateSubImage) |
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| − | + | {{VersionBadge|0.5}} {{VersionBadge|0.6}} {{VersionBadge|0.7}} | |
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| − | < | + | I found that it might be useful to be able to create a subimage from an image. Say for instance u have a minimap created from a file, and you want to be able to zoom it. For this purpose it's best to use a subimage from the map. Basically this code can be used to complete that task: |
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| + | <source lang="cpp"> | ||
//this function is just called to show the imageloading from a file, and selecting a subpart of the image | //this function is just called to show the imageloading from a file, and selecting a subpart of the image | ||
void GUIHud::createMMap() | void GUIHud::createMMap() | ||
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/*this function replaces the image with the new coordinates passed with it, which selects a subimage, | /*this function replaces the image with the new coordinates passed with it, which selects a subimage, | ||
| − | + | and replaces the given image with the newly created one */ | |
createSubImage("ExampleImageSet","Base",CEGUI::Point(0.0f,0.0f),CEGUI::Size(texture->getWidth()-512,texture->getHeight()-512),CEGUI::Point(0.0f,0.0f)); | createSubImage("ExampleImageSet","Base",CEGUI::Point(0.0f,0.0f),CEGUI::Size(texture->getWidth()-512,texture->getHeight()-512),CEGUI::Point(0.0f,0.0f)); | ||
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curr_imageset->defineImage(imageName,start,size,offset); | curr_imageset->defineImage(imageName,start,size,offset); | ||
} | } | ||
| − | </ | + | </source> |
this code was written with Ogre, but the main lines of it should be clear i think. | this code was written with Ogre, but the main lines of it should be clear i think. | ||
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| + | [[Category:HowTo]] | ||
Latest revision as of 23:55, 3 March 2011
Written for CEGUI 0.5
Works with versions 0.5.x (obsolete)
Written for CEGUI 0.6
Works with versions 0.6.x (obsolete)
Written for CEGUI 0.7
Works with versions 0.7.x (obsolete)
I found that it might be useful to be able to create a subimage from an image. Say for instance u have a minimap created from a file, and you want to be able to zoom it. For this purpose it's best to use a subimage from the map. Basically this code can be used to complete that task:
//this function is just called to show the imageloading from a file, and selecting a subpart of the image void GUIHud::createMMap() { //load in a file, replace with your own file CEGUI::Texture* texture = mGUIRenderer->createTexture("Ground1.bmp"); //create a new imageset with an image that spans the entire texture CEGUI::Imageset* set = CEGUI::ImagesetManager::getSingleton().createImageset((CEGUI::utf8*)"ExampleImageSet",texture); set->defineImage("Base",CEGUI::Point(0.0f,0.0f),CEGUI::Size(texture->getWidth(),texture->getHeight()),CEGUI::Point(0.0f,0.0f)); //create a new window for this stuff and link the created image to it CEGUI::StaticImage* renderTarget = (CEGUI::StaticImage*)CEGUI::WindowManager::getSingleton().createWindow((CEGUI::utf8*)"SEM/StaticImage", (CEGUI::utf8*)"BaseWindow"); renderTarget->setSize(CEGUI::Size(0.3f, 0.4f)); CEGUI::WindowManager::getSingleton().getWindow((CEGUI::utf8*)topElement)->addChildWindow(renderTarget); renderTarget->setPosition(CEGUI::Point(0.6, 0.6)); renderTarget->setImage(&set->getImage((CEGUI::utf8*)"Base")); /*this function replaces the image with the new coordinates passed with it, which selects a subimage, and replaces the given image with the newly created one */ createSubImage("ExampleImageSet","Base",CEGUI::Point(0.0f,0.0f),CEGUI::Size(texture->getWidth()-512,texture->getHeight()-512),CEGUI::Point(0.0f,0.0f)); //should not be necessary, if anything weird appears try redrawing the image //renderTarget->requestRedraw(); } //this function replaces the image in the given imageset with the new coordinates that are passed with this function void GUIHud::createSubImage(CEGUI::String imageSetName,CEGUI::String imageName, CEGUI::Point start, CEGUI::Size size,CEGUI::Point offset) { CEGUI::Imageset* curr_imageset = CEGUI::ImagesetManager::getSingleton().getImageset(imageSetName); CEGUI::Texture* texture = curr_imageset->getTexture(); curr_imageset->undefineImage(imageName); curr_imageset->defineImage(imageName,start,size,offset); }
this code was written with Ogre, but the main lines of it should be clear i think.
