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ループ線。
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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 frame_number; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(39); ofSetColor(200); ofNoFill(); ofSetLineWidth(2); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->frame_number = 0; } //-------------------------------------------------------------- void ofApp::update() { this->frame_number += 1; } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); for (int k = 0; k < 15; k++) { ofRotate(24); vector<glm::vec2> vertices; for (int i = 0; i < 80; i++) { auto radius = ofMap(sin((this->frame_number + i) * DEG_TO_RAD * 1.44), -1, 1, 100, 300); auto deg = (this->frame_number + i) * 3; auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); radius = ofMap(sin((this->frame_number + i + 1) * DEG_TO_RAD * 1.44), -1, 1, 100, 300); deg = (this->frame_number + i + 1) * 3; auto next = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); ofSetLineWidth(ofMap(i, 0, 80, 0.1, 2.5)); ofDrawLine(location, next); } } /* int start = 300; 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()); } |