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Day 20 Socks
靴下からパーティクルがっ！靴下からっ！パーティクルがっ！ OpenCVでフレーム差分を検知、物理エンジンはofxBox2dです。
I use OpenCV to detect frame difference and physics engine is ofxBox2d.
[ Source ]
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#pragma once #include "ofMain.h" #include "ofxBox2d.h" #include "opencv2/opencv.hpp" 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<shared_ptr<ofxBox2dCircle>> circles; vector<float> circles_life; vector<ofColor> circles_color; cv::VideoCapture cap; ofVec2f cap_size; cv::Mat pre_frame; cv::Mat frame; ofImage image; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(239); this->box2d.init(); this->box2d.setGravity(0, 50); this->box2d.createBounds(); this->box2d.setFPS(30); this->cap.open("D:\\video\\image41.mp4"); this->cap_size = ofVec2f(this->cap.get(CV_CAP_PROP_FRAME_WIDTH), this->cap.get(CV_CAP_PROP_FRAME_HEIGHT)); this->cap_size *= 0.1; this->image.allocate(this->cap_size.x, this->cap_size.y, OF_IMAGE_COLOR); this->frame = cv::Mat(this->image.getHeight(), this->image.getWidth(), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0); } //-------------------------------------------------------------- void ofApp::update() { cv::Mat src; this->cap >> src; if (src.empty()) { this->cap.set(CV_CAP_PROP_POS_FRAMES, 1); return; } cv::cvtColor(src, src, cv::COLOR_BGR2RGB); cv::resize(src, this->frame, cv::Size(this->cap_size.x, this->cap_size.y)); float span = 15; if (ofGetFrameNum() > 1) { cv::Mat gap = this->pre_frame - this->frame; for (int y = 0; y < gap.rows; y += span) { cv::Vec3b* gap_value = gap.ptr<cv::Vec3b>(y, 0); cv::Vec3b* color_value = this->frame.ptr<cv::Vec3b>(y, 0); for (int x = 0; x < gap.cols; x += span) { cv::Vec3b gv = gap_value[x]; cv::Vec3b cv = color_value[x]; if ((gv[0] + gv[1] + gv[2]) > 32 && cv[0] < 100) { auto circle = make_shared<ofxBox2dCircle>(); circle.get()->setPhysics(3.0, 0.5, 0.1); circle.get()->setup(this->box2d.getWorld(), x + ofGetWidth() / 2 - this->image.getWidth() / 2 + ofRandom(-span / 2, span / 2), y + 100 + ofRandom(-span / 2, span / 2), span / 3); this->circles.push_back(move(circle)); this->circles_life.push_back(255); ofColor c; c.setHsb(ofRandom(255), 200, 255); this->circles_color.push_back(c); } } } } this->frame.copyTo(this->pre_frame); this->image.update(); this->box2d.update(); } //-------------------------------------------------------------- void ofApp::draw() { ofSetColor(255); this->image.draw(ofGetWidth() / 2 - this->image.getWidth() / 2, 100); for (int i = this->circles.size() - 1; i >= 0; i--) { this->circles_life[i] -= 4; if (this->circles_life[i] < 0) { this->circles[i].get()->destroy(); this->circles.erase(this->circles.begin() + i); this->circles_life.erase(this->circles_life.begin() + i); this->circles_color.erase(this->circles_color.begin() + i); } else { ofSetColor(this->circles_color[i]); ofDrawCircle(this->circles[i].get()->getPosition(), this->circles[i].get()->getRadius()); ofDrawLine(this->circles[i].get()->getPosition(), this->circles[i].get()->getPosition() - this->circles[i].get()->getVelocity()); } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |