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OpenCVで描画をぼかしてネオン風にする。
Blurring a draw with OpenCV to make it look neon.
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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) {}; ofFbo fbo; ofPixels pixels; cv::Mat pixels_mat; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openframeworks"); ofBackground(0); ofSetLineWidth(3); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->fbo.allocate(ofGetWidth(), ofGetHeight()); this->fbo.readToPixels(this->pixels); this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData()); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(914); this->fbo.begin(); ofClear(0); ofFill(); ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5); ofColor color; for (int i = 0; i < 14; i++) { auto len = 23; auto radius = (i + 1) * 20; auto deg_start = 0; auto deg_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, 90, 360 + 120); if (deg_param > 360) { deg_param = 360; } auto deg_end = deg_start + deg_param; vector<glm::vec2> vertices_1, vertices_2; for (int deg = deg_start - 5; deg <= deg_end + 5; deg++) { vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD))); vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD))); } reverse(vertices_2.begin(), vertices_2.end()); color.setHsb(ofRandom(255), 255, 255); ofSetColor(color); ofBeginShape(); ofVertices(vertices_1); ofVertices(vertices_2); ofEndShape(true); } this->fbo.end(); this->fbo.readToPixels(this->pixels); cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(49, 49), 50, 50); } //-------------------------------------------------------------- void ofApp::draw() { ofSeedRandom(914); ofFill(); ofSetColor(255); ofImage draw_image; draw_image.setFromPixels(this->pixels); draw_image.draw(0, 0); ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofColor color; for (int i = 0; i < 14; i++) { auto len = 8; auto radius = (i + 1) * 20; auto deg_start = 0; auto deg_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, 90, 360 + 120); if (deg_param > 360) { deg_param = 360; } auto deg_end = deg_start + deg_param; vector<glm::vec2> vertices_1, vertices_2; for (int deg = deg_start; deg <= deg_end; deg++) { vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD))); vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD))); } reverse(vertices_2.begin(), vertices_2.end()); color.setHsb(ofRandom(255), 255, 255); ofFill(); ofSetColor(ofColor(255)); ofBeginShape(); ofVertices(vertices_1); ofVertices(vertices_2); ofEndShape(true); ofNoFill(); ofSetColor(color); ofBeginShape(); ofVertices(vertices_1); ofVertices(vertices_2); ofEndShape(true); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |