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正方形と円の合成。
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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 len, int param); }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openframeworks"); ofBackground(0); ofSetCircleResolution(60); ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); int len = 300; int radius = len * 0.35; for (int x = -170; x <= 170; x += 340) { for (int y = -170; y <= 170; y += 340) { ofSetColor(64); ofNoFill(); ofDrawCircle(glm::vec2(x, y), radius); ofDrawRectangle(glm::vec2(x, y), len, len); vector<glm::vec2> vertices; for (float param = 0; param < 100; param++) { auto noise_value = ofNoise(glm::vec3(x, y, 0) + glm::vec3(this->make_point(len, param) * 0.02, ofGetFrameNum() * 0.015)); if (noise_value < 0.5) { vertices.push_back(this->make_point(len, param)); } else if (noise_value > 0.6) { vertices.push_back(glm::normalize(this->make_point(len, param)) * radius); } else { vertices.push_back(glm::normalize(this->make_point(len, param)) * radius + (this->make_point(len, param) - glm::normalize(this->make_point(len, param)) * radius) * ofMap(noise_value, 0.5, 0.6, 1, 0)); } } ofSetColor(255); ofFill(); for (auto& vertex : vertices) { vertex += glm::vec2(x, y); ofDrawCircle(vertex, 2); } ofNoFill(); ofBeginShape(); ofVertices(vertices); ofEndShape(true); } } } //-------------------------------------------------------------- glm::vec2 ofApp::make_point(int len, int param) { param = param % 100; if (param < 25) { return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5); } else if (param < 50) { return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5)); } else if (param < 75) { return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5); } else { return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5)); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |