• permalink
• code
• show snippet

        void ofApp::setupAnim() {
    paused = true;
    numLayers = 9;
    topLayer = numLayers - 1;
    spacing = 100;
    thickness = 50;
    offset = 0;
    increment = 2;
    masker.setup(numLayers);
    //masker.toggleOverlay();
    
    image.setup("surface.png", width, height, 1, TEXTURE_OFFSET_BOTTOM_LEFT);
    image.incrementTextureOffsetY(0.5);
}

void ofApp::updateAnim(){
    incrementOffset();

    for(int i = 0; i < numLayers - 1; i++) {
        masker.beginLayer(i);
        ofBackground(ofColor(0, 0, 0, 0));
        hue = ofMap(i, 0, numLayers, 20, 140);
        ofSetColor(ofColor::fromHsb(hue, 255, 255, 240));
        rotateScreen(i * 45);
        drawLines();
        masker.endLayer(i);
        
        masker.beginMask(i);
        ofBackground(ofColor::black);
        ofSetColor(ofColor::white);
        rotateScreen(i * 45);
        rotateScreen(90);
        drawLines();
        rotateScreen(-90);
        masker.endMask(i);
    }
    
    masker.beginLayer(topLayer);
    masker.draw();
    masker.endLayer(topLayer);
    
    masker.beginMask(topLayer);
    ofSetColor(ofColor::white);
    image.incrementTextureOffsetX(0.02857142857);
    image.draw();
    rotateScreen(180);
    image.draw();
    rotateScreen(90);
    image.draw();
    rotateScreen(180);
    image.draw();
    masker.endMask(topLayer);
    
}

void ofApp::drawAnim() {
    if(ofGetFrameNum() == spacing) {
        paused = false;
    }
    ofBackground(ofColor::black);
    masker.drawLayer(topLayer);
    masker.drawOverlay();
    if(ofGetFrameNum() == spacing + (spacing / increment)) {
        renderGif();
    }
}

void ofApp::incrementOffset() {
    offset+=increment;
    if(offset >= spacing) {
        offset = 0;
    }
}

void ofApp::drawLines() {
    for(int y = -height; y < doubleHeight; y += spacing) {
        ofRect(-width, y + offset, tripleWidth, thickness);
    }
}

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