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四角形の線上座標を0-100までの引数を元に生成する関数を用意。
ノイズ関数で引数を弄って、生成された座標を結んで不完全な四角形(たまに三角形)を生成しています。
I created method of generate coordinate of rectangle.
Generated coordinate connect with lines.
[ Source ]
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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(39); ofSetColor(239); ofNoFill(); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { int size = 144; for (int x = size * 0.5; x < ofGetWidth(); x += size) { for (int y = size * 0.5; y < ofGetHeight(); y += size) { float noise_seed_1 = ofRandom(1000); float noise_seed_2 = ofRandom(1000); for (int i = 0; i < 10; i++) { int start_param = ofMap(ofNoise(noise_seed_1, (ofGetFrameNum() + i) * 0.005), 0, 1, 0, 100); int end_param = start_param + ofMap(ofNoise(noise_seed_2, (ofGetFrameNum() + i) * 0.005), 0, 1, 25, 85); ofBeginShape(); for (int param = start_param; param < end_param; param++) { ofVertex(this->make_point(size * 0.95, param) + glm::vec2(x, y)); } 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()); } |