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クリエイティブ・コーディング・ちょうちょ。
Butterfly.
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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) {}; ofEasyCam cam; 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); ofNoFill(); ofSetLineWidth(2); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotate(45); for (int i = 0; i < 2; i++) { for (int len = 50; len < 250; len += 25) { vector<glm::vec3> vertices; for (int param = 0; param < 100; param++) { auto location = glm::vec3(this->make_point(len, param), 0) + glm::vec3(len * 0.5, len * -0.5, 0); auto distance = glm::length(location); auto angle_y = ofMap(sin(distance * 0.008 + ofGetFrameNum() * 0.02), -1, 1, -PI * 0.2, PI * 0.2); auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(1, 1, 0)); location = glm::vec4(location, 0) * rotation_y; vertices.push_back(location); } ofBeginShape(); ofVertices(vertices); ofEndShape(true); } ofRotate(180); } this->cam.end(); } //-------------------------------------------------------------- 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()); } |