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			113 lines
		
	
	
	
		
			4.1 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			113 lines
		
	
	
	
		
			4.1 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
#include "atlas.hpp"
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#include <OgreRoot.h>
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#include <OgreSceneManager.h>
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#include <OgreImage.h>
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#include <OgreTexture.h>
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#include <OgreRenderTarget.h>
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#include <OgreCamera.h>
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#include <OgreTextureUnitState.h>
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#include <OgreHardwarePixelBuffer.h>
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#include <OgreConfigFile.h>
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#include <OgreStringConverter.h>
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using namespace Ogre;
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using namespace OEngine::Render;
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void Atlas::createFromFile (const std::string& filename, const std::string& textureName, const std::string& texturePrefix)
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{
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    ConfigFile file;
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    file.load(filename, ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME, "\t:=", true);
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    Root* root = Ogre::Root::getSingletonPtr();
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    SceneManager* sceneMgr = root->createSceneManager(ST_GENERIC);
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    Camera* camera = sceneMgr->createCamera("AtlasCamera");
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    int width = StringConverter::parseInt(file.getSetting("size_x", "settings"));
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    int height = StringConverter::parseInt(file.getSetting("size_y", "settings"));
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    std::vector<Rectangle2D*> rectangles;
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    int i = 0;
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    ConfigFile::SectionIterator seci = file.getSectionIterator();
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    while (seci.hasMoreElements())
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    {
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        Ogre::String sectionName = seci.peekNextKey();
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        seci.getNext();
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        if (sectionName == "settings" || sectionName == "")
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            continue;
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        MaterialPtr material = MaterialManager::getSingleton().create("AtlasMaterial" + StringConverter::toString(i), ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
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        material->getTechnique(0)->getPass(0)->setLightingEnabled(false);
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        material->getTechnique(0)->getPass(0)->setDepthCheckEnabled(false);
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        TextureUnitState* tus = material->getTechnique(0)->getPass(0)->createTextureUnitState(texturePrefix + sectionName);
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        tus->setTextureBorderColour(ColourValue(0, 0, 0, 0));
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        Rectangle2D* rect = new Rectangle2D(true);
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        rect->setMaterial("AtlasMaterial" + StringConverter::toString(i));
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        rect->setRenderQueueGroup(RENDER_QUEUE_BACKGROUND);
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        int x = StringConverter::parseInt(file.getSetting("x", sectionName));
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        int y = StringConverter::parseInt(file.getSetting("y", sectionName));
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        TexturePtr texture = TextureManager::getSingleton().getByName(texturePrefix + sectionName);
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        if (texture.isNull())
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        {
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            std::cerr << "OEngine::Render::Atlas: Can't find texture " << texturePrefix + sectionName << ", skipping..." << std::endl;
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            continue;
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        }
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        int textureWidth = texture->getWidth();
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        int textureHeight = texture->getHeight();
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        float left = x/float(width) * 2 - 1;
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        float top = (1-(y/float(height))) * 2 - 1;
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        float right = ((x+textureWidth))/float(width) * 2 - 1;
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        float bottom = (1-((y+textureHeight)/float(height))) * 2 - 1;
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        rect->setCorners(left, top, right, bottom);
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        // Use infinite AAB to always stay visible
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        AxisAlignedBox aabInf;
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        aabInf.setInfinite();
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        rect->setBoundingBox(aabInf);
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        // Attach background to the scene
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        SceneNode* node = sceneMgr->getRootSceneNode()->createChildSceneNode();
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        node->attachObject(rect);
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        rectangles.push_back(rect);
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        ++i;
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    }
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    TexturePtr destTexture = TextureManager::getSingleton().createManual(
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                    textureName,
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                    ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
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                    TEX_TYPE_2D,
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                    width, height,
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                    0,
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                    PF_FLOAT16_RGBA,
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                    TU_RENDERTARGET);
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    RenderTarget* rtt = destTexture->getBuffer()->getRenderTarget();
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    rtt->setAutoUpdated(false);
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    Viewport* vp = rtt->addViewport(camera);
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    vp->setOverlaysEnabled(false);
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    vp->setShadowsEnabled(false);
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    vp->setBackgroundColour(ColourValue(0,0,0,0));
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    rtt->update();
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    // remove all the junk we've created
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    for (std::vector<Rectangle2D*>::iterator it=rectangles.begin();
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        it!=rectangles.end(); ++it)
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    {
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        delete (*it);
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    }
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    while (i > 0)
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    {
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        MaterialManager::getSingleton().remove("AtlasMaterial" + StringConverter::toString(i-1));
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        --i;
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    }
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    root->destroySceneManager(sceneMgr);
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}
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