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ノイズの引数の値を大きく変化させたり少しだけ変化させたりする。
Vary the value of the noise argument significantly or slightly.
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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) {}; int gon; vector<float> gap_list; vector<ofColor> color_list; float noise_param; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(0); ofSetLineWidth(1); this->gon = 10; for (auto i = 0; i < this->gon; i++) { this->gap_list.push_back(0); } } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); if (ofGetFrameNum() % 120 < 45) { this->noise_param += ofMap(ofGetFrameNum() % 60, 0, 45, 0.045, 0.001); } else { this->noise_param += 0.001; } for (auto& gap : this->gap_list) { gap = ofMap(ofNoise(ofRandom(1000), this->noise_param), 0, 1, 0.01, 0.5); } } //-------------------------------------------------------------- void ofApp::draw() { ofPushMatrix(); ofTranslate(ofGetWindowSize() * 0.5); ofRotate(this->noise_param * RAD_TO_DEG * 10); auto radius = 600; int deg_span = 360 / this->gon; vector<glm::vec2> vertices; auto first = true; while (true) { if (first) { for (auto deg = 0; deg < 360; deg += deg_span) { vertices.push_back(glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD))); } first = false; } else { vector<glm::vec2> tmp; for (auto k = 0; k < vertices.size(); k++) { tmp.push_back(vertices[k] + (vertices[(k + 1) % vertices.size()] - vertices[k]) * this->gap_list[k]); } vertices = tmp; } ofSetColor(ofMap(glm::distance(vertices[0], vertices[1]), 300, 1, 0, 255)); ofNoFill(); ofBeginShape(); ofVertices(vertices); ofEndShape(true); if (glm::distance(vertices[0], vertices[1]) < 1) { break; } } ofPopMatrix(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |