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レインボーシャワー。
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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(25); ofSetWindowTitle("openframeworks"); ofBackground(39); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofSeedRandom(39); auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000)); int count = 25; int len = 160; float head_size = 2; ofColor color; for (int k = 0; k < count; k++) { color.setHsb(ofMap(k, 0, count, 0, 255), 130, 255); ofSetColor(color); ofMesh mesh; vector<glm::vec3> right, left; glm::vec3 last_location; float last_theta; float deg = ofMap(k, 0, count, 0, 360); float span = 0.0314; for (int i = 0; i < len; i++) { auto radius = ofMap(sin((ofGetFrameNum() + i) * span), 0, 1, 270, 330); auto next_radius = ofMap(sin((ofGetFrameNum() + i + 1) * span), 0, 1, 270, 330); auto location = glm::vec3(radius * cos((ofGetFrameNum() + i + deg) * DEG_TO_RAD), radius * sin((ofGetFrameNum() + i + deg) * DEG_TO_RAD), 0); auto next = glm::vec3(next_radius * cos((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), next_radius * sin((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), 0); auto direction = next - location; auto theta = atan2(direction.y, direction.x); right.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta + PI * 0.5), 0)); left.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta - PI * 0.5), 0)); last_location = location; last_theta = theta; } for (int i = 0; i < right.size(); i++) { mesh.addVertex(left[i]); mesh.addVertex(right[i]); } for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) { mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3); mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3); } mesh.addVertex(last_location); int index = mesh.getNumVertices(); for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) { mesh.addVertex(last_location + glm::vec3(head_size * cos(theta), head_size * sin(theta), 0)); } for (int i = index; i < mesh.getNumVertices() - 1; i++) { mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1); } mesh.draw(); } /* // ffmpeg -i img_%04d.jpg aaa.mp4 int start = 60; 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); } } */ } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/e2106e6113b077f9ac926cba7b39847c0624ab17