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狭い道。
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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 mouseEntered(int x, int y) {}; void mouseExited(int x, int y) {}; void windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; void draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor color); float noise_param; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(39); this->noise_param = ofRandom(1000); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); if (ofGetFrameNum() % 50 < 25) { this->noise_param += ofMap(ofGetFrameNum() % 25, 0, 25, 0.15, 0); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); auto big_radius = 330; auto small_radius = 180; auto len = 90; for (int deg = 0; deg < 360; deg += 4) { auto l = ofMap(ofNoise(cos(deg * DEG_TO_RAD) * 4, sin(deg * DEG_TO_RAD) * 4, this->noise_param), 0, 1, 0, len); auto location = glm::vec2(big_radius * cos(deg * DEG_TO_RAD), big_radius * sin(deg * DEG_TO_RAD)); auto target = glm::vec2((big_radius - l) * cos(deg * DEG_TO_RAD), (big_radius - l) * sin(deg * DEG_TO_RAD)); this->draw_arrow(location, target, 8, ofColor(39)); l = len - l; location = glm::vec2(small_radius * cos(deg * DEG_TO_RAD), small_radius * sin(deg * DEG_TO_RAD)); target = glm::vec2((small_radius + l) * cos(deg * DEG_TO_RAD), (small_radius + l) * sin(deg * DEG_TO_RAD)); this->draw_arrow(location, target, 8, ofColor(39)); } ofFill(); for (int i = 0; i < 40; i++) { auto deg = ofGetFrameNum() * 2.88 + i * 2; auto l = ofMap(ofNoise(cos(deg * DEG_TO_RAD) * 4, sin(deg * DEG_TO_RAD) * 4, this->noise_param), 0, 1, 0, len); auto radius = big_radius - l - 30; auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); ofDrawCircle(location, ofMap(i, 0, 40, 1, 3)); } /* // ffmpeg -i img_%04d.jpg aaa.mp4 int start = 150; if (ofGetFrameNum() > start) { std::ostringstream os; os << std::setw(4) << std::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); } } */ } //-------------------------------------------------------------- void ofApp::draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor color) { auto angle = std::atan2(target.y - location.y, target.x - location.x); auto distance = glm::distance(target, location); ofPushMatrix(); ofTranslate(target); ofSetColor(color); ofFill(); ofBeginShape(); ofVertex(glm::vec2(size * cos(angle), size * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5))); ofEndShape(); ofBeginShape(); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5); ofEndShape(); ofSetColor(239); ofNoFill(); ofBeginShape(); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5))); ofVertex(glm::vec2(size * cos(angle), size * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5); ofEndShape(); ofBeginShape(); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5); ofEndShape(); ofPopMatrix(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/cb2b2bb5920996842da68704c46e8a74fd814e0b