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正方形に閉じ込める。
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Random walk on twist torus. Draw by openFrameworks
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ねじりトーラスの上のランダムウォーク。
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ofApp.h
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#pragma once #include "ofMain.h" class Actor { public: Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list); void update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list); glm::vec3 getLocation(); deque<glm::vec3> getLog(); void setColor(ofColor color); ofColor getColor(); private: int select_index; int next_index; glm::vec3 location; deque<glm::vec3> 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) {}; glm::vec3 make_point(float R, float r, float u, float v); vector<glm::vec3> location_list; vector<vector<int>> next_index_list; vector<int> destination_list; vector<unique_ptr<Actor>> actor_list; ofEasyCam cam; }; |
ofApp.cpp
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#include "ofApp.h" //-------------------------------------------------------------- Actor::Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) { this->select_index = ofRandom(location_list.size()); while (true) { auto itr = find(destination_list.begin(), destination_list.end(), this->select_index); if (itr == destination_list.end()) { destination_list.push_back(this->select_index); break; } this->select_index = (this->select_index + 1) % location_list.size(); } this->next_index = this->select_index; } //-------------------------------------------------------------- void Actor::update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) { if (ofGetFrameNum() % frame_span == 0) { auto tmp_index = this->select_index; this->select_index = this->next_index; int retry = next_index_list[this->select_index].size(); this->next_index = next_index_list[this->select_index][(int)ofRandom(next_index_list[this->select_index].size())]; while (--retry > 0) { auto destination_itr = find(destination_list.begin(), destination_list.end(), this->next_index); if (destination_itr == destination_list.end()) { if (tmp_index != this->next_index) { destination_list.push_back(this->next_index); break; } } this->next_index = next_index_list[this->select_index][(this->next_index + 1) % next_index_list[this->select_index].size()]; } if (retry <= 0) { destination_list.push_back(this->select_index); this->next_index = this->select_index; } } auto param = ofGetFrameNum() % frame_span; auto distance = location_list[this->next_index] - location_list[this->select_index]; this->location = location_list[this->select_index] + distance / frame_span * param; this->log.push_front(this->location); while (this->log.size() > 60) { this->log.pop_back(); } } //-------------------------------------------------------------- glm::vec3 Actor::getLocation() { return this->location; } //-------------------------------------------------------------- deque<glm::vec3> Actor::getLog() { return this->log; } //-------------------------------------------------------------- void Actor::setColor(ofColor color) { this->color = color; } //-------------------------------------------------------------- ofColor Actor::getColor() { return this->color; } //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetColor(255); ofEnableDepthTest(); int v_span = 3; int u_span = 15; int R = 330; int r = 60; for (int v = 0; v <= 360 * 6; v += v_span) { auto z = glm::vec3(0, 0, ofMap(v, 0, 360 * 6, -360 * 3, 360 * 3)); for (int u = 0; u < 360; u += u_span) { this->location_list.push_back(this->make_point(R, r, u, v) + z); } } for (auto& location : this->location_list) { vector<int> next_index = vector<int>(); int index = -1; for (auto& other : this->location_list) { index++; if (location == other) { continue; } float distance = glm::distance(location, other); auto threshold = ofMap(glm::length(glm::vec3(location.x, location.y, 0)), R - r, R + r, 19, 21); if (distance <= threshold) { next_index.push_back(index); } } this->next_index_list.push_back(next_index); } for (int i = 0; i < 3000; i++) { this->actor_list.push_back(make_unique<Actor>(this->location_list, this->next_index_list, this->destination_list)); this->actor_list.back()->setColor(ofColor(255)); } } //-------------------------------------------------------------- void ofApp::update() { int frame_span = 10; int prev_index_size = 0; if (ofGetFrameNum() % frame_span == 0) { prev_index_size = this->destination_list.size(); } for (auto& actor : this->actor_list) { actor->update(frame_span, this->location_list, this->next_index_list, this->destination_list); } if (prev_index_size != 0) { this->destination_list.erase(this->destination_list.begin(), this->destination_list.begin() + prev_index_size); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateY(90); ofRotateZ(ofGetFrameNum() * 0.066666); for (auto& actor : this->actor_list) { ofSetColor(actor->getColor()); ofFill(); ofDrawSphere(actor->getLocation(), 2); ofNoFill(); ofBeginShape(); for (auto& l : actor->getLog()) { ofVertex(l); } ofEndShape(); } ofMesh face; int v_span = 3; int u_span = 15; int R = 330; int r = 58; for (int v = 0; v <= 360 * 6; v += v_span) { auto z = glm::vec3(0, 0, ofMap(v, 0, 360 * 6, -360 * 3, 360 * 3)); auto next_z = glm::vec3(0, 0, ofMap(v + v_span, 0, 360 * 6, -360 * 3, 360 * 3)); auto next_u = u_span; for (int u = 0; u < 360; u += u_span) { face.addVertex(this->make_point(R, r, u, v) + z); face.addVertex(this->make_point(R, r, u + u_span, v) + z); face.addVertex(this->make_point(R, r, next_u + u_span, v + v_span) + next_z); face.addVertex(this->make_point(R, r, next_u, v + v_span) + next_z); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4); next_u += u_span; } } ofSetColor(0); face.draw(); this->cam.end(); } //-------------------------------------------------------------- glm::vec3 ofApp::make_point(float R, float r, float u, float v) { // 数学デッサン教室 描いて楽しむ数学たち P.31 u *= DEG_TO_RAD; v *= DEG_TO_RAD; auto x = (R + r * cos(u)) * cos(v); auto y = (R + r * cos(u)) * sin(v); auto z = r * sin(u); return glm::vec3(x, y, z); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
Change color. Draw by openFrameworks
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色を変える。
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ofApp.h
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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) {}; ofEasyCam cam; }; |
ofApp.cpp
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetColor(255); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); if (ofGetFrameNum() % 240 < 60) { ofBackground(ofMap(ofGetFrameNum() % 240, 0, 60, 0, 255)); ofSetColor(ofMap(ofGetFrameNum() % 240, 0, 60, 255, 0)); } if(ofGetFrameNum() % 240 > 120 && ofGetFrameNum() % 240 < 180) { ofBackground(ofMap(ofGetFrameNum() % 240, 120, 180, 255, 0)); ofSetColor(ofMap(ofGetFrameNum() % 240, 120, 180, 0, 255)); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); for (int i = 0; i < 200; i++) { auto x = ofRandom(-600, 600); auto y = ofRandom(-600, 600); auto z = (int)(ofRandom(1200) + ofGetFrameNum() * 20) % 1200 - 600; ofDrawLine(glm::vec3(x, y, z), glm::vec3(x, y, z - 30)); } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |