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いろんな色の線を束ねる。
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#pragma once #include "ofMain.h" class ofApp : public ofBaseApp { public: void setup(); void update(); void draw(); void keyPressed(int key) {}; void keyReleased(int key) {}; void mouseMoved(int x, int y) {}; void mouseDragged(int x, int y, int button) {}; void mousePressed(int x, int y, int button) {}; void mouseReleased(int x, int y, int button) {}; void windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; float noise_value; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(3); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->noise_value = ofRandom(1000); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); if (ofGetFrameNum() % 90 < 15) { this->noise_value += ofMap(ofGetFrameNum() % 30, 0, 15, 0.2, 0); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); for (int x = -360; x <= 360; x += 10) { for (int y = -360; y <= 360; y += 10) { vector<glm::vec2> vertices; vertices.push_back(glm::vec2(x, y)); for (int i = 0; i < 50; i++) { auto deg = ofMap(ofNoise(vertices.back().x * 0.0015, vertices.back().y * 0.0015, this->noise_value), 0, 1, -360, 360); auto vertex = vertices.back() + glm::vec2(4 * cos(deg * DEG_TO_RAD), 4 * sin(deg * DEG_TO_RAD)); vertices.push_back(vertex); } ofColor color; color.setHsb(ofRandom(0, 255), 255, 40); ofSetColor(color); ofNoFill(); ofBeginShape(); ofVertices(vertices); ofEndShape(); } } ostringstream os; os << setw(4) << setfill('0') << ofGetFrameNum(); ofImage image; image.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); image.saveImage("image/img_" + os.str() + ".jpg"); if (ofGetFrameNum() >= 30 * 20 + 1) { std::exit(1); } // > ffmpeg -i img_%04d.jpg -r 30 out.mp4 } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |