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伸びる矢印たち。
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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) {}; void draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor fill_color, ofColor no_fill_color); vector<glm::vec2> location_list; vector<glm::vec2> direction_list; vector<glm::vec2> target_list; vector<ofColor> color_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(3); } //-------------------------------------------------------------- void ofApp::update() { // 配色デザイン ビビッドブルー P144 vector<ofColor> color_palette; color_palette.push_back(ofColor(18, 85, 163)); color_palette.push_back(ofColor(0, 165, 231)); color_palette.push_back(ofColor(93, 177, 186)); color_palette.push_back(ofColor(44, 121, 191)); color_palette.push_back(ofColor(136, 185, 79)); color_palette.push_back(ofColor(246, 221, 80)); color_palette.push_back(ofColor(200, 59, 57)); if (ofGetFrameNum() % 2 == 0) { glm::vec2 location; glm::vec2 direction; glm::vec2 target; int r = ofRandom(4); if (r == 0) { location = glm::vec2(ofRandom(0, ofGetWindowWidth()), -30); direction = glm::vec2(0, 10); target = location + direction; } if (r == 1) { location = glm::vec2(ofRandom(0, ofGetWindowWidth()), 750); direction = glm::vec2(0, -10); target = location + direction; } if (r == 2) { location = glm::vec2(-30, ofRandom(0, ofGetWindowHeight())); direction = glm::vec2(10, 0); target = location + direction; } if (r == 3) { location = glm::vec2(750, ofRandom(0, ofGetWindowHeight())); direction = glm::vec2(-10, 0); target = location + direction; } this->location_list.push_back(location); this->direction_list.push_back(direction); this->target_list.push_back(target); int color_index = ofRandom(color_palette.size()); this->color_list.push_back(color_palette[color_index]); } for (int i = 0; i < this->location_list.size(); i++) { this->target_list[i] += this->direction_list[i]; } while (this->location_list.size() > 1000) { this->location_list.erase(this->location_list.begin()); this->direction_list.erase(this->direction_list.begin()); this->target_list.erase(this->target_list.begin()); this->color_list.erase(this->color_list.begin()); } } //-------------------------------------------------------------- void ofApp::draw() { for (int i = 0; i < this->location_list.size(); i++) { this->draw_arrow(this->location_list[i], this->target_list[i], 30, this->color_list[i], ofColor(255)); } } //-------------------------------------------------------------- void ofApp::draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor fill_color, ofColor no_fill_color) { auto angle = std::atan2(target.y - location.y, target.x - location.x); auto distance = glm::distance(target, location); ofPushMatrix(); ofTranslate(target); ofSetColor(fill_color); ofFill(); ofBeginShape(); ofVertex(glm::vec2(size * cos(angle), size * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5))); ofEndShape(); ofBeginShape(); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5); ofEndShape(); ofSetColor(no_fill_color); ofNoFill(); ofBeginShape(); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5))); ofVertex(glm::vec2(size * cos(angle), size * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5))); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5); ofEndShape(); ofBeginShape(); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5); ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5 - glm::vec2(distance * cos(angle), distance * sin(angle))); ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.5); ofEndShape(); ofPopMatrix(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |