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ベジェ曲線の勉強。
Studying the Bezier Curve.
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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(30); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetColor(39); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { int radius = 80; int deg_span = 30; for (int x = 200; x <= ofGetWidth(); x += 320) { for (int y = 200; y <= ofGetHeight(); y += 320) { for (int deg = 0; deg < 360; deg += deg_span) { int next_deg = deg + deg_span; float noise_param = ofMap(ofNoise(glm::vec3( x + cos(deg * DEG_TO_RAD), y + sin(deg * DEG_TO_RAD), ofGetFrameNum() * 0.02)), 0, 1, 0, 2); float next_noise_param = ofMap(ofNoise(glm::vec3( x + cos((deg + deg_span) * DEG_TO_RAD), y + sin((deg + deg_span) * DEG_TO_RAD), ofGetFrameNum() * 0.02)), 0, 1, 2, 0); vector<glm::vec2> vertices; vertices.push_back(glm::vec2( x + radius * cos(deg * DEG_TO_RAD), y + radius * sin(deg * DEG_TO_RAD))); vertices.push_back(glm::vec2( x + (radius * noise_param) * cos((deg + deg_span * 0.25) * DEG_TO_RAD), y + (radius * noise_param) * sin((deg + deg_span * 0.25) * DEG_TO_RAD))); vertices.push_back(glm::vec2( x + (radius * next_noise_param) * cos((next_deg - deg_span * 0.25) * DEG_TO_RAD), y + (radius * next_noise_param) * sin((next_deg - deg_span * 0.25)* DEG_TO_RAD))); vertices.push_back(glm::vec2( x + radius * cos(next_deg * DEG_TO_RAD), y + radius * sin(next_deg * DEG_TO_RAD))); ofNoFill(); ofSetLineWidth(2); ofBeginShape(); ofVertex(vertices[0]); ofBezierVertex(vertices[1], vertices[2], vertices[3]); ofEndShape(); ofFill(); for (auto& vertex : vertices) { ofDrawCircle(vertex, 1.5); } ofSetLineWidth(1); ofDrawLine(vertices[0], vertices[1]); ofDrawLine(vertices[3], vertices[2]); } } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |