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noise to bar graph.
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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) {}; float noise_param; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetColor(39); ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER); this->noise_param = ofRandom(1000); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { int x_span = 10; int y_span = 180; int height = 60; for (int x = x_span * 3; x <= ofGetWidth() - x_span * 3; x += x_span) { for (int y = y_span; y < ofGetHeight(); y += y_span) { auto noise_value = ofNoise(x * 0.02, y * 0.02, this->noise_param); if (noise_value < 0.5) { ofDrawRectangle(glm::vec2(x, y - ofMap(noise_value, 0, 0.5, height * 0.5, 0)), x_span * 0.8, ofMap(noise_value, 0, 0.5, height, 0)); } else { ofDrawRectangle(glm::vec2(x, y + ofMap(noise_value, 0.5, 1, 0, height * 0.5)), x_span * 0.8, ofMap(noise_value, 0.5, 1, 0, height)); } } } if (ofGetFrameNum() % 60 < 45) { this->noise_param += ofMap(ofGetFrameNum() % 60, 0, 45, 0.05, 0); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |