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四角いプロペラ
Square propeller.
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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 mouseEntered(int x, int y) {}; void mouseExited(int x, int y) {}; 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); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { auto span = 180; auto len = 150; auto width = 5; for (int x = span * 0.5; x < ofGetWidth(); x += span) { for (int y = span * 0.5; y < ofGetHeight(); y += span) { ofPushMatrix(); ofTranslate(x, y); int n = ofRandom(3, 8); for (int i = 0; i < n; i++) { auto param_start = (int)(ofRandom(50) + ofGetFrameNum() * ofRandom(0.5, 1)) % 100; vector<glm::vec2> vertices, sub_vertices;; for (int param = param_start; param <= param_start + width; param++) { vertices.push_back(this->make_point(len, param)); } param_start = param_start + 50; for (int param = param_start; param <= param_start + width; param++) { sub_vertices.push_back(this->make_point(len, param)); } reverse(sub_vertices.begin(), sub_vertices.end()); auto color_value = ofRandom(39, 239); ofFill(); ofSetColor(color_value); ofBeginShape(); ofVertices(vertices); ofVertices(sub_vertices); ofEndShape(true); ofNoFill(); ofSetColor(ofMap(color_value, 39, 239, 239, 39)); ofBeginShape(); ofVertices(vertices); ofVertices(sub_vertices); ofEndShape(true); } ofPopMatrix(); } } } //-------------------------------------------------------------- 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()); } |