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[ About ]
ノイジー長方形。
Noisy rectangular.
[ Source ]
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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; ofMesh mesh, frame; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetLineWidth(1.5); ofEnableDepthTest(); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->mesh.clear(); this->frame.clear(); int len = 300; int width = 20; for (int z = -len; z <= len; z += width) { int start_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 100, 200); int noise_value = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 25, 100); int end_param = start_param + noise_value; int start_index = this->mesh.getNumVertices(); for (int param = start_param; param <= end_param; param++) { int index = mesh.getNumVertices() - 2; vector<glm::vec3> vertices; vertices.push_back(glm::vec3(this->make_point(len, param), z + width * 0.5)); vertices.push_back(glm::vec3(this->make_point(len, param), z - width * 0.5)); mesh.addVertices(vertices); frame.addVertices(vertices); if (index > start_index) { mesh.addIndex(index + 0); mesh.addIndex(index + 1); mesh.addIndex(index + 3); mesh.addIndex(index + 0); mesh.addIndex(index + 2); mesh.addIndex(index + 3); frame.addIndex(index + 0); frame.addIndex(index + 2); frame.addIndex(index + 1); frame.addIndex(index + 3); } if (param % 25 == 0) { frame.addIndex(frame.getNumVertices() - 1); frame.addIndex(frame.getNumVertices() - 2); } } frame.addIndex(start_index); frame.addIndex(start_index + 1); frame.addIndex(frame.getNumVertices() - 1); frame.addIndex(frame.getNumVertices() - 2); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(90); ofRotateZ(45); ofSetColor(39); this->mesh.draw(); ofSetColor(239); this->frame.drawWireframe(); 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()); } |