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Twisting video.
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#pragma once #include "ofMain.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 windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; cv::VideoCapture cap; cv::Size cap_size; cv::Mat frame; ofImage image; int number_of_frames; vector<cv::Mat> frame_list; ofEasyCam cam; ofMesh mesh, mesh_frame; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofEnableDepthTest(); this->cap.open("D:\\MP4\\production ID_3761468.mp4"); this->cap_size = cv::Size(640, 360); this->image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR); this->frame = cv::Mat(cv::Size(this->image.getWidth(), this->image.getHeight()), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0); this->number_of_frames = this->cap.get(cv::CAP_PROP_FRAME_COUNT); for (int i = 0; i < this->number_of_frames; i++) { cv::Mat src, tmp; this->cap >> src; if (src.empty()) { continue; } cv::resize(src, tmp, this->cap_size); cv::cvtColor(tmp, tmp, cv::COLOR_BGR2RGB); this->frame_list.push_back(tmp); } this->mesh_frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { this->mesh.clear(); this->mesh_frame.clear(); int n = (int)(ofGetFrameNum() * 0.54) % this->number_of_frames; this->frame_list[n].copyTo(this->frame); this->image.update(); int span = 10; for (int x = this->cap_size.width * -0.5; x < this->cap_size.width * 0.5; x += span) { auto angle = ofMap(ofNoise(x * 0.003 + ofGetFrameNum() * 0.02), 0, 1, -PI * 2, PI * 2); auto rotation = glm::rotate(glm::mat4(), angle, glm::vec3(1, 0, 0)); auto next_angle = ofMap(ofNoise((x + span) * 0.003 + ofGetFrameNum() * 0.02), 0, 1, -PI * 2, PI * 2); auto next_rotation = glm::rotate(glm::mat4(), next_angle, glm::vec3(1, 0, 0)); for (int y = this->cap_size.height * -0.5; y < this->cap_size.height * 0.5; y += span) { int index = this->mesh.getNumVertices(); vector<glm::vec3> vertices; vertices.push_back(glm::vec4(x, y, 0, 0) * rotation); vertices.push_back(glm::vec4(x + span, y, 0, 0) * next_rotation); vertices.push_back(glm::vec4(x + span, y + span, 0, 0) * next_rotation); vertices.push_back(glm::vec4(x, y + span, 0, 0) * rotation); this->mesh.addVertices(vertices); this->mesh.addTexCoord(glm::vec3(x + this->cap_size.width * 0.5, y + this->cap_size.height * 0.5, 0)); this->mesh.addTexCoord(glm::vec3(x + span + this->cap_size.width * 0.5, y + this->cap_size.height * 0.5, 0)); this->mesh.addTexCoord(glm::vec3(x + span + this->cap_size.width * 0.5, y + span + this->cap_size.height * 0.5, 0)); this->mesh.addTexCoord(glm::vec3(x + this->cap_size.width * 0.5, y + span + this->cap_size.height * 0.5, 0)); mesh.addIndex(index + 0); mesh.addIndex(index + 1); mesh.addIndex(index + 2); mesh.addIndex(index + 0); mesh.addIndex(index + 2); mesh.addIndex(index + 3); if (x == this->cap_size.width * -0.5) { int mesh_frame_index = this->mesh_frame.getNumVertices(); this->mesh_frame.addVertex(vertices[0]); this->mesh_frame.addVertex(vertices[3]); this->mesh_frame.addIndex(mesh_frame_index + 0); this->mesh_frame.addIndex(mesh_frame_index + 1); } if (x == this->cap_size.width * 0.5 - span) { int mesh_frame_index = this->mesh_frame.getNumVertices(); this->mesh_frame.addVertex(vertices[1]); this->mesh_frame.addVertex(vertices[2]); this->mesh_frame.addIndex(mesh_frame_index + 0); this->mesh_frame.addIndex(mesh_frame_index + 1); } if (y == this->cap_size.height * -0.5) { int mesh_frame_index = this->mesh_frame.getNumVertices(); this->mesh_frame.addVertex(vertices[0]); this->mesh_frame.addVertex(vertices[1]); this->mesh_frame.addIndex(mesh_frame_index + 0); this->mesh_frame.addIndex(mesh_frame_index + 1); } if (y == this->cap_size.height * 0.5 - span) { int mesh_frame_index = this->mesh_frame.getNumVertices(); this->mesh_frame.addVertex(vertices[2]); this->mesh_frame.addVertex(vertices[3]); this->mesh_frame.addIndex(mesh_frame_index + 0); this->mesh_frame.addIndex(mesh_frame_index + 1); } } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(180); ofSetColor(255); this->image.bind(); this->mesh.draw(); this->image.unbind(); ofSetColor(39); this->mesh_frame.drawWireframe(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |