• permalink
• code
• show snippet

        void ofApp::setupAnim() {
    ofDisableArbTex();
    setupImage("building.png", &img, &tex);

    plane.set(width, height);
    plane.setPosition(width * 0.5, height * 0.5, 0);
    plane.setResolution(2, 2);
}

void ofApp::drawAnim() {
    ofBackground(0, 0, 0);
    ofSetColor(255, 255, 255);
    
    ofEnableBlendMode(OF_BLENDMODE_ADD);
    drawLayers();
    rotateScreen(90);
    drawLayers();
    rotateScreen(90);
    drawLayers();
    rotateScreen(90);
    drawLayers();
    ofDisableBlendMode();
    
    if(ofGetFrameNum() == 200) renderGif();
}

void ofApp::drawLayers() {
    tx0 = -0.4;
    ty0 = ofGetFrameNum() * 0.01;
    tx1 = tx0 + 1;
    ty1 = ty0 + 0.25;
    drawLayer();
    
    ty0 = -ofGetFrameNum() * 0.01;
    ty1 = ty0 + 0.25;
    drawLayer();
}

void ofApp::drawLayer() {
    plane.mapTexCoords(tx0, ty0, tx1, ty1);
    plane.mapTexCoords(tx1, ty1, tx0, ty0);
    tex.bind();
    plane.draw();
    tex.unbind();
}

void ofApp::setupImage(string file, ofImage *img, ofTexture *tex) {
    img->loadImage(file);
    *tex = img->getTextureReference();
    tex->setTextureWrap(GL_MIRRORED_REPEAT, GL_MIRRORED_REPEAT);
}

void ofApp::rotateScreen(float degrees) {
    ofTranslate(halfWidth, halfHeight, 0);
    ofRotate(90);
    ofTranslate(-halfWidth, -halfHeight, 0);
}