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ベジェ曲線で円を描く。
Draw a circle with Bezier curves.
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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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetColor(39); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { int radius = 100; float handle_len = radius * 0.5522; int number_of_location = 4; int deg_span = 360 / number_of_location; for (int x = 200; x <= ofGetWidth(); x += 320) { for (int y = 200; y <= ofGetHeight(); y += 320) { vector<glm::vec2> location_list; vector<float> deg_list; for (int deg = 0; deg < 360; deg += deg_span) { location_list.push_back(glm::vec2(x + radius * cos(deg * DEG_TO_RAD), y + radius * sin(deg * DEG_TO_RAD))); deg_list.push_back(deg + 90); } for (int i = 0; i < location_list.size(); i++) { deg_list[i] += ofMap(ofNoise(glm::vec3(location_list[i], ofGetFrameNum() * 0.01)), 0, 1, -180, 180); } ofNoFill(); ofSetLineWidth(2); ofBeginShape(); for (int i = 0; i < location_list.size(); i++) { int n = (i + 1) % location_list.size(); ofVertex(location_list[i]); ofBezierVertex( location_list[i] + glm::vec2(handle_len * cos(deg_list[i] * DEG_TO_RAD), handle_len * sin(deg_list[i] * DEG_TO_RAD)), location_list[n] + glm::vec2(handle_len * cos((deg_list[n] + 180) * DEG_TO_RAD), handle_len * sin((deg_list[n] + 180) * DEG_TO_RAD)), location_list[n]); } ofEndShape(); ofFill(); ofSetLineWidth(0.5); for (int i = 0; i < location_list.size(); i++) { ofDrawCircle(location_list[i], 5); ofDrawCircle(location_list[i] + glm::vec2(handle_len * cos(deg_list[i] * DEG_TO_RAD), handle_len * sin(deg_list[i] * DEG_TO_RAD)), 3); ofDrawCircle(location_list[i] + glm::vec2(handle_len * cos((deg_list[i] + 180) * DEG_TO_RAD), handle_len * sin((deg_list[i] + 180) * DEG_TO_RAD)), 3); ofDrawLine(location_list[i], location_list[i] + glm::vec2(handle_len * cos(deg_list[i] * DEG_TO_RAD), handle_len * sin(deg_list[i] * DEG_TO_RAD))); ofDrawLine(location_list[i], location_list[i] + glm::vec2(handle_len * cos((deg_list[i] + 180) * DEG_TO_RAD), handle_len * sin((deg_list[i] + 180) * DEG_TO_RAD))); } } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |