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四角形の辺の長さをノイズで変化
Noisy rectangles.
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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(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetColor(39); ofSetLineWidth(2); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { int span = 144; bool flag = true; for (int y = span * 0.5; y < ofGetHeight(); y += span) { for (int x = span * 0.5; x < ofGetWidth(); x += span) { vector<glm::vec2> vertices; int len_base = 100; for (int param = 0; param < 100; param++) { auto location = glm::vec2(x, y) + this->make_point(len_base, param); auto noise_value = ofNoise(location.x * 0.003, location.y * 0.003, ofGetFrameNum() * 0.01); int noise_len = len_base; if (noise_value > 0.7) { noise_len = ofMap(noise_value, 0.7, 1, len_base, len_base + 44); } if (noise_value < 0.3) { noise_len = ofMap(noise_value, 0, 0.3, len_base - 44, len_base); } noise_len = (noise_len / 20) * 20; vertices.push_back(glm::vec2(x, y) + this->make_point(noise_len, param)); } flag ? ofFill() : ofNoFill(); flag = !flag; 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()); } |