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2重三角形。
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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) {}; glm::vec2 make_point(int radius, int deg); }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(39); ofSetLineWidth(2); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5 + 100); ofRotate(270); ofColor color; for (int radius = 180; radius <= 400; radius += 220) { ofPushMatrix(); if (radius < 400) { ofRotate(ofGetFrameNum() * 2.16 + 75); } int deg_start = radius * 0.5 + ofGetFrameNum() * 2.16; for (int deg = deg_start; deg < deg_start + 360; deg += 120) { vector<glm::vec2> vertices; for (int tmp_deg = deg; tmp_deg <= deg + 110; tmp_deg += 1) { vertices.push_back(glm::vec2(this->make_point(radius, tmp_deg))); } color.setHsb(ofMap(deg, deg_start, deg_start + 360, 0, 255), 180, 255); ofFill(); ofSetColor(ofColor(color, 64)); ofBeginShape(); ofVertices(vertices); ofEndShape(true); ofNoFill(); ofSetColor(color); ofBeginShape(); ofVertices(vertices); ofEndShape(true); } ofPopMatrix(); } /* // 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); } } */ } //-------------------------------------------------------------- glm::vec2 ofApp::make_point(int radius, int deg) { deg = deg % 360; int deg_a = (deg / 120) * 120; int deg_b = deg_a + 120; int remainder = deg % 120; int diff = deg - deg_a; auto point_a = glm::vec2(radius * cos(deg_a * DEG_TO_RAD), radius * sin(deg_a * DEG_TO_RAD)); auto point_b = glm::vec2(radius * cos(deg_b * DEG_TO_RAD), radius * sin(deg_b * DEG_TO_RAD)); auto distance = point_b - point_a; return point_a + (distance / 120) * diff; } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/9c3b1c0e9809b4ffb6db6aabf5f7c2c7a621771f