ofxPiMapper/example-fboTexture/src/ofApp.cpp

#include "ofApp.h"

void ofApp::setup()
{
    bShowInfo = false;
    
    // check if the surfaces.xml file is there
    // if not - load defaultSurfaces.xml
    if ( ofFile::doesFileExist("surfaces.xml") ) {
        surfaceManager.loadXmlSettings("surfaces.xml");
    } else {
        surfaceManager.loadXmlSettings("defaultSurfaces.xml");
    }
    
    // Pass the surface manager to the mapper graphical user interface
    gui.setSurfaceManager( &surfaceManager );
    
    // Create FBO
    fbo = new ofFbo();
    fbo->allocate( 500, 500 );
    setFboAsTexture();
    
    // Genereate rects
    int numRects = 20; // change this to add more or less rects
    for ( int i=0; i<numRects; i++ ) {
        rects.push_back( ofRectangle(0, ofRandom(fbo->getHeight()), fbo->getWidth(), ofRandom(20)) );
        rectSpeeds.push_back( (1.0f + ofRandom(5)) );
    }
}

void ofApp::update()
{
    // Move rects
    for ( int i=0; i<rects.size(); i++ ) {
        rects[i].y += rectSpeeds[i];
        if ( rects[i].y > fbo->getHeight() ) {
            rects[i].y = -rects[i].getHeight();
        }
    }
    
    // Fill FBO
    fbo->begin();
    ofClear(0);
    ofBackground(0);
    ofSetColor(255);
    for ( int i=0; i<rects.size(); i++ ) {
        ofRect( rects[i] );
    }
    fbo->end();
}

void ofApp::draw()
{
    // Draw the piMapper GUI
    gui.draw();
    
    if ( bShowInfo ) {
        // Draw instructions
        stringstream ss;
        ss << "There are 4 modes:\n\n";
        ss << " 1. Presentation mode\n";
        ss << " 2. Texture mapping mode\n";
        ss << " 3. Projection mapping mode\n";
        ss << " 4. Source selection mode\n\n";
        ss << "You can switch between the modes by using <1>, <2>, <3> and <4> keys on the keyboard.\n\n";
        ss << "Press <r> or <n> to add random or normal surface.\n";
        ss << "Press <q> to add a new quad surface.\n";
        ss << "Press <s> to save the composition.\n";
        ss << "Press <f> to toggle fullscreen.\n";
        ss << "Press <a> to reassign the fbo texture to the first surface\n";
        ss << "Hit <i> to hide this message.";
        
        ofDrawBitmapStringHighlight(ss.str(), 10, 20, ofColor(0,0,0,100), ofColor(255,255,255,200));
    }
}

void ofApp::exit()
{
    // Clear FBO from mem
    delete fbo;
}

void ofApp::keyPressed(int key)
{
	cout << "Key pressed: " << static_cast<char>(key) << endl;
    
    switch (key) {
        case '1': gui.setMode(ofxGuiMode::NONE); break;
        case '2': gui.setMode(ofxGuiMode::TEXTURE_MAPPING); break;
        case '3': gui.setMode(ofxGuiMode::PROJECTION_MAPPING); break;
        case '4': gui.setMode(ofxGuiMode::SOURCE_SELECTION); break;
        case 'i': bShowInfo = !bShowInfo; break;
        case 'r': addRandomSurface(); break;
        case 'q': addQuadSurface(); break;
        case 'n': addSurface(); break;
        case 'f': ofToggleFullscreen(); break;
        case 's': surfaceManager.saveXmlSettings("surfaces.xml"); break;
        case 'a': setFboAsTexture(); break;
        case OF_KEY_BACKSPACE: surfaceManager.removeSelectedSurface(); break;
        default: break;
    }
}

void ofApp::addRandomSurface()
{
    int surfaceType = ofxSurfaceType::TRIANGLE_SURFACE;
    vector<ofVec2f> vertices;
    vertices.push_back( ofVec2f( ofRandomWidth(), ofRandomHeight() ) );
    vertices.push_back( ofVec2f( ofRandomWidth(), ofRandomHeight() ) );
    vertices.push_back( ofVec2f( ofRandomWidth(), ofRandomHeight() ) );
    vector<ofVec2f> texCoords;
    texCoords.push_back( ofVec2f( ofRandomuf(), ofRandomuf() ) );
    texCoords.push_back( ofVec2f( ofRandomuf(), ofRandomuf() ) );
    texCoords.push_back( ofVec2f( ofRandomuf(), ofRandomuf() ) );
    surfaceManager.addSurface(surfaceType, vertices, texCoords);
    
    // select this surface right away
    surfaceManager.selectSurface(surfaceManager.size()-1);
}

void ofApp::addQuadSurface()
{
    int surfaceType = ofxSurfaceType::QUAD_SURFACE;
    vector<ofVec2f> vertices;

    int border = 50;
    vertices.push_back( ofVec2f(border, border) );
    vertices.push_back( ofVec2f(border, ofGetHeight() - border) );
    vertices.push_back( ofVec2f(ofGetWidth() - border, ofGetHeight() - border) );
    vertices.push_back( ofVec2f(ofGetWidth() - border, border) );

    vector<ofVec2f> texCoords;
    texCoords.push_back( ofVec2f(ofVec2f(0.0f, 0.0f)) );
    texCoords.push_back( ofVec2f(ofVec2f(1.0f, 0.0f)) );
    texCoords.push_back( ofVec2f(ofVec2f(1.0f, 1.0f)) );
    texCoords.push_back( ofVec2f(ofVec2f(0.0f, 1.0f)) );

    surfaceManager.addSurface(surfaceType, vertices, texCoords);
    
    // select this surface right away
    surfaceManager.selectSurface(surfaceManager.size()-1);
}

void ofApp::addSurface()
{
    int surfaceType = ofxSurfaceType::TRIANGLE_SURFACE;
    vector<ofVec2f> vertices;
    vertices.push_back( ofVec2f( (float)ofGetWidth()/2.0f, 0.0f ) );
    vertices.push_back( ofVec2f( (float)ofGetWidth(), (float)ofGetHeight() ) );
    vertices.push_back( ofVec2f( 0.0f, (float)ofGetHeight() ) );
    vector<ofVec2f> texCoords;
    texCoords.push_back( ofVec2f( 0.5f, 0.0f ) );
    texCoords.push_back( ofVec2f( 1.0f, 1.0f ) );
    texCoords.push_back( ofVec2f( 0.0f, 1.0f ) );
    surfaceManager.addSurface(surfaceType, vertices, texCoords);
    
    // select this surface right away
    surfaceManager.selectSurface(surfaceManager.size()-1);
}

void ofApp::setFboAsTexture()
{
    surfaceManager.getSurface(0)->setTexture( &fbo->getTextureReference() );
}