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円と四角。
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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) {}; glm::vec2 make_point(int len, int param); ofEasyCam cam; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openframeworks"); ofBackground(255); ofSetLineWidth(1); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); int len = 40; int width = len * 0.15; for (int x = -len * 8; x <= len * 8; x += len) { for (int y = -len * 8; y <= len * 8; y += len) { ofPushMatrix(); ofTranslate(x, y, 0); ofMesh mesh, frame; frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); mesh.addVertex(glm::vec3()); for (int param = 0; param <= 100; param++) { float deg = param * 3.6 - 135; auto noise_value = ofNoise(x * 0.002 + cos(deg * DEG_TO_RAD) * 0.15, y * 0.002 + sin(deg * DEG_TO_RAD) * 0.15, ofGetFrameNum() * 0.015); vector<glm::vec3> vertices; if (noise_value > 0.5) { vertices.push_back(glm::vec3(this->make_point(len, param), width * 0.5)); } else { vertices.push_back(glm::vec3(len * 0.4 * cos(deg * DEG_TO_RAD), len * 0.4 * sin(deg * DEG_TO_RAD), width * 0.5)); } mesh.addVertices(vertices); frame.addVertices(vertices); if (param > 0) { mesh.addIndex(0); mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 2); frame.addIndex(frame.getNumVertices() - 1); frame.addIndex(frame.getNumVertices() - 2); } } ofSetColor(0); frame.drawWireframe(); ofSetColor(0, 168); mesh.draw(); ofPopMatrix(); } } this->cam.end(); } //-------------------------------------------------------------- glm::vec2 ofApp::make_point(int len, int param) { param = param % 100; if (param < 25) { return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5); } else if (param < 50) { return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5)); } else if (param < 75) { return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5); } else { return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5)); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |