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Roll walker.
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#pragma once #include "ofMain.h" class Walker { public: Walker(glm::vec2 location, ofColor color); void update(); void change_rotate(); void draw(); private: glm::vec2 rotate_location; float rotate_radius; float rotate_deg; int rotate_direction; vector<glm::vec2> log; ofColor color; }; 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) {}; ofEasyCam cam; vector<Walker> walker_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- Walker::Walker(glm::vec2 location, ofColor color) { this->log.push_back(location); this->change_rotate(); this->color = color; } //-------------------------------------------------------------- void Walker::update() { if (glm::length(this->log.back()) > 720) { this->log.clear(); auto location = glm::vec2(ofRandom(-300, 300), ofRandom(-300, 300)); this->log.push_back(location); this->change_rotate(); } auto location = this->rotate_location + glm::vec2(this->rotate_radius * cos(this->rotate_deg * DEG_TO_RAD), this->rotate_radius * sin(this->rotate_deg * DEG_TO_RAD)); this->rotate_deg += this->rotate_direction * 10; this->rotate_radius -= 0.25; this->log.push_back(location); if (this->rotate_radius < 0 || ofRandom(100) < 0.5) { this->change_rotate(); } while (this->log.size() > 150) { this->log.erase(this->log.begin()); } } //-------------------------------------------------------------- void Walker::change_rotate() { auto tmp_radius = ofRandom(30, 80); auto tmp_deg = this->rotate_deg + ofRandom(-90, 90); this->rotate_location = this->log.back() + glm::vec2(tmp_radius * cos(tmp_deg * DEG_TO_RAD), tmp_radius * sin(tmp_deg * DEG_TO_RAD)); this->rotate_deg = 180 + tmp_deg; this->rotate_radius = tmp_radius; this->rotate_direction = ofRandom(100) < 50 ? 1 : -1; } //-------------------------------------------------------------- void Walker::draw() { ofMesh mesh, frame; frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); for (int i = 0; i < this->log.size(); i++) { auto right = glm::vec3(this->log[i], -15); auto left = glm::vec3(this->log[i], 15); mesh.addVertex(right); mesh.addVertex(left); frame.addVertex(right); frame.addVertex(left); if (i > 0) { mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 2); mesh.addIndex(mesh.getNumVertices() - 4); mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 3); mesh.addIndex(mesh.getNumVertices() - 4); frame.addIndex(frame.getNumVertices() - 1); frame.addIndex(frame.getNumVertices() - 3); frame.addIndex(frame.getNumVertices() - 2); frame.addIndex(frame.getNumVertices() - 4); } mesh.addColor(color); mesh.addColor(color); frame.addColor(ofColor(239)); frame.addColor(ofColor(239)); } frame.addIndex(0); frame.addIndex(1); frame.addIndex(frame.getNumVertices() - 1); frame.addIndex(frame.getNumVertices() - 2); mesh.draw(); frame.drawWireframe(); } //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofEnableDepthTest(); ofSetLineWidth(2); vector<ofColor> base_color_list; ofColor color; vector<int> hex_list = { 0x247BA0, 0x70C1B3, 0xB2DBBF, 0xF3FFBD, 0xFF1654 }; for (auto hex : hex_list) { color.setHex(hex); base_color_list.push_back(color); } for (int i = 0; i < 20; i++) { this->walker_list.push_back(Walker(glm::vec2(ofRandom(-300, 300), ofRandom(-300, 300)), base_color_list[ofRandom(base_color_list.size())])); } } //-------------------------------------------------------------- void ofApp::update() { for (auto& walker : this->walker_list) { walker.update(); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); for (auto& walker : this->walker_list) { walker.draw(); } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |