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ofxBox2のポリゴンで矢印を描く。
Draw an arrow with the ofxBox2 polygon.
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#pragma once #include "ofMain.h" #include "ofxBox2d.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) {} ofxBox2d box2d; vector<ofColor> base_color_list; vector<glm::vec2> noise_param_list; vector<shared_ptr<ofxBox2dPolygon>> polygon_list; vector<float> polygon_life_list; vector<ofColor> polygon_color_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetLineWidth(2); this->box2d.init(); this->box2d.setGravity(0, 30); this->box2d.createBounds(); this->box2d.setFPS(60); this->base_color_list.push_back(ofColor(39)); for (int i = 0; i < 2; i++) { this->noise_param_list.push_back(glm::vec2(ofRandom(1000), ofRandom(1000))); } } //-------------------------------------------------------------- void ofApp::update() { if(ofGetFrameNum() % 10 == 0) { for (int i = 0; i < this->noise_param_list.size(); i++) { auto location = glm::vec2( ofMap(ofNoise(this->noise_param_list[i].x, ofGetFrameNum() * 0.008), 0, 1, 100, 620), ofMap(ofNoise(this->noise_param_list[i].y, ofGetFrameNum() * 0.008), 0, 1, 100, 360)); auto target = glm::vec2( ofMap(ofNoise(this->noise_param_list[i].x, (ofGetFrameNum() + 1) * 0.008), 0, 1, 100, 620), ofMap(ofNoise(this->noise_param_list[i].y, (ofGetFrameNum() + 1) * 0.008), 0, 1, 100, 360)); auto size = 30; auto angle = std::atan2(target.y - location.y, target.x - location.x); int color_index = ofRandom(this->base_color_list.size()); vector<glm::vec2> vertices; vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25); vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5))); vertices.push_back(location + glm::vec2(size * cos(angle), size * sin(angle))); vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5))); vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25); vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25); vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5); vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5); vertices.push_back(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25); auto polygon = make_shared<ofxBox2dPolygon>(); polygon->addTriangle(vertices[0], vertices[1], vertices[2]); polygon->setPhysics(1.0, 0.7, 0.3); polygon->create(box2d.getWorld()); this->polygon_list.push_back(move(polygon)); this->polygon_life_list.push_back(128); this->polygon_color_list.push_back(this->base_color_list[color_index]); polygon = make_shared<ofxBox2dPolygon>(); polygon->addTriangle(vertices[0], vertices[2], vertices[4]); polygon->setPhysics(1.0, 0.7, 0.3); polygon->create(box2d.getWorld()); this->polygon_list.push_back(move(polygon)); this->polygon_life_list.push_back(128); this->polygon_color_list.push_back(this->base_color_list[color_index]); polygon = make_shared<ofxBox2dPolygon>(); polygon->addTriangle(vertices[4], vertices[2], vertices[3]); polygon->setPhysics(1.0, 0.7, 0.3); polygon->create(box2d.getWorld()); this->polygon_list.push_back(move(polygon)); this->polygon_life_list.push_back(128); this->polygon_color_list.push_back(this->base_color_list[color_index]); polygon = make_shared<ofxBox2dPolygon>(); polygon->addTriangle(vertices[5], vertices[6], vertices[7]); polygon->setPhysics(1.0, 0.7, 0.3); polygon->create(box2d.getWorld()); this->polygon_list.push_back(move(polygon)); this->polygon_life_list.push_back(128); this->polygon_color_list.push_back(this->base_color_list[color_index]); polygon = make_shared<ofxBox2dPolygon>(); polygon->addTriangle(vertices[5], vertices[7], vertices[8]); polygon->setPhysics(1.0, 0.7, 0.3); polygon->create(box2d.getWorld()); this->polygon_list.push_back(move(polygon)); this->polygon_life_list.push_back(128); this->polygon_color_list.push_back(this->base_color_list[color_index]); } } for (int i = this->polygon_list.size() - 1; i > -1; i--) { this->polygon_life_list[i] -= 1; if (this->polygon_life_list[i] < 0) { this->polygon_list[i]->destroy(); this->polygon_list.erase(this->polygon_list.begin() + i); this->polygon_life_list.erase(this->polygon_life_list.begin() + i); this->polygon_color_list.erase(this->polygon_color_list.begin() + i); } } this->box2d.update(); } //-------------------------------------------------------------- void ofApp::draw() { ofNoFill(); ofSetColor(39); for (int i = 0; i < this->noise_param_list.size(); i++) { auto location = glm::vec2( ofMap(ofNoise(this->noise_param_list[i].x, ofGetFrameNum() * 0.008), 0, 1, 100, 620), ofMap(ofNoise(this->noise_param_list[i].y, ofGetFrameNum() * 0.008), 0, 1, 100, 360)); auto target = glm::vec2( ofMap(ofNoise(this->noise_param_list[i].x, (ofGetFrameNum() + 1) * 0.008), 0, 1, 100, 620), ofMap(ofNoise(this->noise_param_list[i].y, (ofGetFrameNum() + 1) * 0.008), 0, 1, 100, 360)); auto size = 30; auto angle = std::atan2(target.y - location.y, target.x - location.x); ofSetColor(39); ofNoFill(); ofBeginShape(); ofVertex(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25); ofVertex(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5))); ofVertex(location + glm::vec2(size * cos(angle), size * sin(angle))); ofVertex(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5))); ofVertex(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25); ofEndShape(); ofBeginShape(); ofVertex(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25); ofVertex(location + glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5); ofVertex(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5); ofVertex(location + glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25); ofEndShape(); } ofFill(); for (int i = 0; i < this->polygon_list.size(); i++) { if (this->polygon_life_list[i] > 64) { ofSetColor(this->polygon_color_list[i]); } else { ofSetColor(this->polygon_color_list[i], ofMap(this->polygon_life_list[i], 64, 0, 255, 0)); } this->polygon_list[i]->draw(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |