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輪切り。
Circle split.
[ Source ]
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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) {}; vector<glm::vec2> location_list; vector<float> noise_seed_list; vector<int> deg_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetColor(39); for (int x = -300; x <= 300; x += 100) { for (int y = -300; y <= 300; y += 100) { this->location_list.push_back(glm::vec2(x, y)); this->noise_seed_list.push_back(ofRandom(1000)); } } this->deg_list = {10, 15, 18, 30, 36, 72, 90, 120, 180}; } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); int anime_rate = 90; auto param = ofGetFrameNum() % anime_rate; int radius = 15; if (param == 0) { for (int i = 0; i < this->location_list.size(); i++) { this->noise_seed_list[i] = ofRandom(1000); } } for (int i = 0; i < this->location_list.size(); i++) { ofPushMatrix(); ofTranslate(this->location_list[i]); int deg_span = this->deg_list[(int)ofMap(ofNoise(this->noise_seed_list[i]), 0, 1, 1, this->deg_list.size())]; for (int deg_start = 0; deg_start < 360; deg_start += deg_span) { auto source_location = glm::vec2(radius * cos(deg_start * DEG_TO_RAD), radius * sin(deg_start * DEG_TO_RAD)); auto add_radius = radius * 1.5; auto anime_param = 0.f; if (param > anime_rate * 0.4 && param <= anime_rate * 0.5) { anime_param = ofMap(param, anime_rate * 0.4, anime_rate * 0.5, 0, 1); } else if (param > anime_rate * 0.5 && param <= anime_rate * 0.9) { anime_param = 1; } else if (param > anime_rate * 0.9 && param <= anime_rate) { anime_param = ofMap(param, anime_rate * 0.9, anime_rate, 1, 0); } auto noise_location = glm::vec2(anime_param * add_radius * cos(deg_start * DEG_TO_RAD), anime_param * add_radius * sin(deg_start * DEG_TO_RAD)); vector<glm::vec2> out, in; for (int deg = deg_start - deg_span * 0.5; deg <= deg_start + deg_span * 0.5; deg++) { in.push_back(noise_location + glm::vec2((radius - 3) * cos(deg * DEG_TO_RAD), (radius - 3) * sin(deg * DEG_TO_RAD))); out.push_back(noise_location + glm::vec2((radius + 3) * cos(deg * DEG_TO_RAD), (radius + 3) * sin(deg * DEG_TO_RAD))); } if (param < anime_rate * 0.4) { ofSetColor(239); } else if (param < anime_rate * 0.5) { ofSetColor(ofMap(param, anime_rate * 0.4, anime_rate * 0.5, 239, 39)); } else if (param < anime_rate * 0.9) { ofSetColor(39); } else { ofSetColor(ofMap(param, anime_rate * 0.9, anime_rate, 39, 239)); } ofDrawLine(glm::vec2(), source_location + noise_location); ofSetColor(39); ofBeginShape(); ofVertices(in); reverse(out.begin(), out.end()); ofVertices(out); ofEndShape(true); } ofPopMatrix(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |