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矢印チェイン。
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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) {}; void draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor color); }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(39); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); auto noise_seed = ofRandom(1000); int radius_span = 60; for (int radius = 0; radius <= 600; radius += radius_span) { vector<glm::vec2> vertices; for (int deg = 0; deg < 360; deg += 120) { auto noise_deg_1 = ofMap(ofNoise(noise_seed, radius * 0.001 - ofGetFrameNum() * 0.005), 0, 1, -270, 270); auto noise_deg_2 = ofMap(ofNoise(noise_seed, (radius + radius_span) * 0.001 - ofGetFrameNum() * 0.005), 0, 1, -270, 270); auto location_1 = glm::vec2(radius * cos((deg + noise_deg_1) * DEG_TO_RAD), radius * sin((deg + noise_deg_1) * DEG_TO_RAD)); auto location_2 = glm::vec2((radius + radius_span) * cos((deg + noise_deg_2) * DEG_TO_RAD), (radius + radius_span) * sin((deg + noise_deg_2) * DEG_TO_RAD)); this->draw_arrow(location_2, location_1, 18, ofColor(255)); vertices.push_back(location_1); } /* ofNoFill(); ofSetLineWidth(0.75); ofSetColor(139); ofBeginShape(); ofVertices(vertices); ofEndShape(true); */ } /* int start = 275; 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); } } */ } //-------------------------------------------------------------- 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 translate_location = target - glm::vec2(size * 1.5 * cos(angle), size * 1.5 * sin(angle)); auto distance = glm::distance(translate_location, location); ofPushMatrix(); ofTranslate(translate_location); ofSetColor(color); ofFill(); ofBeginShape(); ofVertex(glm::vec2(size * cos(angle), size * sin(angle))); ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5))); ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5))); ofEndShape(); ofBeginShape(); ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)) * 0.25); ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)) * 0.25); ofEndShape(); ofPopMatrix(); ofDrawCircle(location, 5); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |