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Alpha = ofMap(distance, 0, len, 0, 255);
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#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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(39); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { float span = 1; vector<ofColor> color_list = { ofColor(255, 0, 0), ofColor(0, 255, 0), ofColor(0, 0, 255) }; for (int i = 0; i < color_list.size(); i++) { ofMesh mesh; auto noise_value = ofRandom(1000); for (float x = 10; x < ofGetWindowWidth() - 10 - span; x += span) { for (float y = 10; y < ofGetWindowHeight() - 10 - span; y += span) { int distance = glm::distance(glm::vec2(x, y), ofGetWindowSize() * 0.5); distance = distance % 100; if (distance > 70) { continue; } distance = abs(distance - 35); mesh.addVertex(glm::vec3(x, y, 0)); mesh.addVertex(glm::vec3(x + span, y, 0)); mesh.addVertex(glm::vec3(x + span, y + span, 0)); mesh.addVertex(glm::vec3(x, y + span, 0)); for (int k = mesh.getNumVertices() - 4; k < mesh.getNumVertices(); k++) { auto noise_value = ofNoise(mesh.getVertex(k).x * 0.05, mesh.getVertex(k).y * 0.05, ofGetFrameNum() * 0.02 + i * 0.1); int int_noise_value = noise_value; float param = noise_value - int_noise_value; param = abs(param - 0.5); auto alpha = param < 0.125 ? ofMap(param, 0, 0.125, 255, 0) : 0; alpha = alpha * (distance < 15 ? 1 : ofMap(distance, 15, 35, 1, 0)); auto color = ofColor(color_list[i], alpha); mesh.addColor(color); } mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 2); mesh.addIndex(mesh.getNumVertices() - 3); mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 3); mesh.addIndex(mesh.getNumVertices() - 4); } } mesh.draw(); } /* int start = 1; 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()); } |