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波打つ四角。
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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(255); ofSetColor(0); ofSetLineWidth(2); ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); int len = 450; for (int param = 0; param <= 100; param++) { auto noise_value = ofNoise((this->make_point(len, param).x + this->make_point(len, param + 1).x) * 0.05 + ofGetFrameNum() * 0.05); auto y = 0; if (noise_value < 0.35) { y = ofMap(noise_value, 0, 0.35, len * -0.75, 0); } if (noise_value > 0.65) { y = ofMap(noise_value, 0.65, 1, 0, len * 0.75); } ofDrawLine(this->make_point(len, param) + glm::vec2(0, y) , this->make_point(len, param + 1) + glm::vec2(0, y)); ofDrawRectangle(this->make_point(len, param) + glm::vec2(0, y), 6, 6); ofDrawRectangle(this->make_point(len, param + 1) + glm::vec2(0, y), 6, 6); } } //-------------------------------------------------------------- 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()); } |