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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(float theta); ofEasyCam cam; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); vector<ofColor> base_color_list; ofColor color; vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c }; for (auto hex : hex_list) { color.setHex(hex); base_color_list.push_back(color); } int color_index = 0; for (auto scale = 1; scale < 20; scale += 1) { ofMesh face, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); vector<glm::vec2> vertices; auto param = (ofGetFrameNum() * 3 + scale * 20) % 720; for (auto deg = 0; deg < 360; deg += 1) { if (param < 360) { if (deg < param) { vertices.push_back(this->make_point(deg * DEG_TO_RAD) * scale); } } else { if (deg > param - 360) { vertices.push_back(this->make_point(deg * DEG_TO_RAD) * scale); } } } for (auto& vertex : vertices){ face.addVertex(glm::vec3(vertex, -15)); face.addVertex(glm::vec3(vertex, 15)); line.addVertex(glm::vec3(vertex, -15)); line.addVertex(glm::vec3(vertex, 15)); if (vertex != vertices.front()) { face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 4); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4); line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 4); } face.addColor(base_color_list[color_index]); face.addColor(base_color_list[color_index]); line.addColor(ofColor(39)); line.addColor(ofColor(39)); } line.addIndex(0); line.addIndex(1); line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2); face.draw(); line.drawWireframe(); color_index = (color_index + 1) % base_color_list.size(); } this->cam.end(); } //-------------------------------------------------------------- //Reference by https://twitter.com/shiffman/status/1095764239665512453 glm::vec2 ofApp::make_point(float theta) { float x = 16 * (pow(sin(theta), 3)); float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta); return glm::vec2(x, -y); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |