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多角形。
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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_param; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(39); ofSetColor(239); ofNoFill(); ofSetLineWidth(1.5); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); if (ofGetFrameNum() % 50 < 30) { this->noise_param += ofMap(ofGetFrameNum() % 50, 0, 30, 0.1, 0); } } //-------------------------------------------------------------- void ofApp::draw() { auto deg_span = 60; for (int x = 90; x < ofGetWindowWidth(); x += 180) { for (int y = 90; y < ofGetWindowHeight(); y += 180) { vector<glm::vec2> vertices_1; vector<glm::vec2> vertices_2; auto base_radius = 40; auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000)); auto deg_start = ofMap(ofNoise(ofRandom(1000), this->noise_param), 0, 1, -360, 360); auto deg_span = 360 / (int)ofRandom(3, 6); for (int deg = deg_start; deg < deg_start + 360; deg += deg_span) { auto noise_radius = ofMap(ofNoise(noise_seed.y, this->noise_param), 0, 1, 0, 80); auto noise_deg = ofMap(ofNoise(noise_seed.x, this->noise_param), 0, 1, -360, 360); auto base = glm::vec2(x + base_radius * cos(deg * DEG_TO_RAD), y + base_radius * sin(deg * DEG_TO_RAD)); auto target = glm::vec2(x + noise_radius * cos((deg + noise_deg) * DEG_TO_RAD), y + noise_radius * sin((deg + noise_deg) * DEG_TO_RAD)); vertices_1.push_back(base); vertices_2.push_back(target); ofDrawLine(base, target); } ofBeginShape(); ofVertices(vertices_1); ofEndShape(true); ofBeginShape(); ofVertices(vertices_2); ofEndShape(true); } } /* int start = 100; if (ofGetFrameNum() > start) { ostringstream os; os << setw(4) << setfill('0') << ofGetFrameNum() - start; ofImage image; image.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); image.saveImage("image/cap/img_" + os.str() + ".jpg"); if (ofGetFrameNum() - start >= 25 * 20) { std::exit(1); } } */ } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |