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グラデーション・円弧。
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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); ofSetLineWidth(2); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { int span = 0; for (int x = 90; x < ofGetWindowWidth(); x += 180) { for (int y = 90; y < ofGetWindowHeight(); y += 180) { ofPushMatrix(); ofTranslate(x, y); auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000)); ofColor color; for (int radius = 30; radius < 75; radius += 3) { ofMesh face, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); int start_deg = ofMap(ofNoise(noise_seed.x, radius * 0.02 + ofGetFrameNum() * 0.01), 0, 1, -360, 360); int deg_len = 30; color.setHsb((int)(ofMap(radius, 30, 75, 0, 255) + span) % 255, 255, 255); face.addVertex(glm::vec3()); face.addColor(ofColor(color, 128)); for (int deg = start_deg; deg < start_deg + deg_len; deg += 1) { face.addVertex(glm::vec3() + glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0)); face.addColor(ofColor(color, 64)); line.addVertex(glm::vec3() + glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0)); line.addColor(color); if (deg != start_deg) { face.addIndex(0); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2); } } face.draw(); line.draw(); } ofPopMatrix(); span += 20; } } /* int start = 50; 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()); } |