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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | #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) {}; 	vector<vector<glm::vec2>> log_list; 	vector<glm::vec2> velocity_list; 	vector<float> speed_list; 	vector<float> life_list; 	vector<ofColor> color_list; }; | 
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | #include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { 	ofSetFrameRate(25); 	ofSetWindowTitle("openframeworks"); 	ofBackground(239); 	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_SUBTRACT); } //-------------------------------------------------------------- void ofApp::update() { 	ofColor color; 	for (int i = 0; i < 150; i++) { 		auto deg = ofRandom(360); 		auto location = glm::vec2(200 * cos(deg * DEG_TO_RAD), 200 * sin(deg * DEG_TO_RAD)); 		auto next = glm::vec2(201 * cos(deg * DEG_TO_RAD), 201 * sin(deg * DEG_TO_RAD)); 		vector<glm::vec2> log; 		log.push_back(location); 		this->log_list.push_back(log); 		if (ofRandom(100) < 50) { 			this->velocity_list.push_back(next - location); 		} 		else { 			this->velocity_list.push_back(location - next); 		} 		this->speed_list.push_back(ofRandom(5, 10)); 		this->life_list.push_back(15); 		this->color_list.push_back(ofColor(100)); 	} 	for (int i = this->log_list.size() - 1; i >= 0; i--) { 		auto fueture = glm::normalize(this->velocity_list[i]) * 30; 		auto deg = ofMap(ofNoise(glm::vec3(this->log_list[i].back() * 0.01, ofGetFrameNum() * 0.005)), 0, 1, -360, 360); 		fueture = fueture + glm::vec2(10 * cos(deg * DEG_TO_RAD), 10 * sin(deg * DEG_TO_RAD)); 		fueture = this->log_list[i].back() + glm::normalize(fueture) * this->speed_list[i]; 		this->log_list[i].push_back(fueture); 		this->life_list[i] -= 1; 		if (this->life_list[i] < 0) { 			this->log_list.erase(this->log_list.begin() + i); 			this->velocity_list.erase(this->velocity_list.begin() + i); 			this->speed_list.erase(this->speed_list.begin() + i); 			this->life_list.erase(this->life_list.begin() + i); 			this->color_list.erase(this->color_list.begin() + i); 		} 	} } //-------------------------------------------------------------- void ofApp::draw() { 	ofTranslate(ofGetWindowSize() * 0.5); 	for (int i = 0; i < this->log_list.size(); i++) { 		ofSetColor(this->color_list[i], ofMap(this->life_list[i], 0, 15, 32, 255)); 		ofBeginShape(); 		ofVertices(this->log_list[i]); 		ofEndShape(); 	} 	/* 	int start = 150; 	if (ofGetFrameNum() > start) { 		ostringstream os; 		os << setw(4) << setfill('0') << ofGetFrameNum() - start; 		ofImage image; 		image.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); 		image.saveImage("image/cap/img_" + os.str() + ".jpg"); 		if (ofGetFrameNum() - start >= 25 * 20) { 			std::exit(1); 		} 	} 	*/ } //-------------------------------------------------------------- int main() { 	ofSetupOpenGL(720, 720, OF_WINDOW); 	ofRunApp(new ofApp()); } |