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角度ごとに半径を計算。Radius = BaseRadius + (1 + NoiseValue) ^ N
Calculate radius for each angle. Radius = BaseRadius + (1 + NoiseValue) ^ N
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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 location; float percent; float noise_seed; float noise_scale; ofColor color; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetBackgroundAuto(false); ofSetColor(39); this->location = glm::vec2(ofRandom(ofGetWidth() * 0.2, ofGetWidth() * 0.8), ofRandom(ofGetHeight() * 0.2, ofGetHeight() * 0.8)); this->percent = 0.0; this->noise_seed = ofRandom(10000); this->noise_scale = ofRandom(3, 8); this->color.setHsb(ofRandom(255), 230, 255); } //-------------------------------------------------------------- void ofApp::update() { if (this->percent < 1.0) { this->percent += 0.15; } else { this->location = glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight())); this->percent = 0.f; this->noise_seed = ofRandom(10000); this->noise_scale = ofRandom(3, 8); this->color.setHsb(ofRandom(255), ofRandom(100, 255), ofRandom(200, 255)); } } //-------------------------------------------------------------- void ofApp::draw() { float base_radius = 80; ofPushMatrix(); ofTranslate(this->location); vector<glm::vec2> vertices; for (int i = 0; i < 3600; i++) { float deg = i * 0.1; auto noise_point = glm::vec2(cos(deg * DEG_TO_RAD), sin(deg * DEG_TO_RAD)); auto noise_value = ofNoise(this->noise_seed, noise_point.x * this->noise_scale, noise_point.y * this->noise_scale); float grow_radius = base_radius + pow((1 + noise_value), 7) * this->percent; auto point = glm::vec2(grow_radius * cos(deg * DEG_TO_RAD), grow_radius * sin(deg * DEG_TO_RAD)); vertices.push_back(point); } ofSetColor(this->color); ofBeginShape(); ofVertices(vertices); ofEndShape(); ofPopMatrix(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |