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正方形を這い回る線。
Lines on square.
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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 face_mesh, frame_mesh; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetLineWidth(2); ofEnableDepthTest(); this->frame_mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->face_mesh.clear(); this->frame_mesh.clear(); int len = 100; ofColor color; for (int i = 0; i < 100; i++) { int seed_z = ofRandom(len * 0.5); int seed_param = i; int step_z = 1; int step_param = 1; int start_index = this->face_mesh.getNumVertices(); bool break_flag = true; color.setHsb(ofRandom(255), 180, 255); for (int k = 0; k < 25; k++) { int z = (int)(seed_z + ofGetFrameNum() + k * step_z) % len - len * 0.5; if (z <= -245 || z >= 245) { break_flag = false; break; } int upper_z = z + step_z; int param = (seed_param + ofGetFrameNum() + k * step_param) % 100; int next_param = param + step_param; auto index = this->face_mesh.getVertices().size(); vector<glm::vec3> vertices = { glm::vec3(this->make_point(len, param), z), glm::vec3(this->make_point(len, param), upper_z), glm::vec3(this->make_point(len, next_param), upper_z), glm::vec3(this->make_point(len, next_param), upper_z + step_z) }; this->face_mesh.addVertices(vertices); this->frame_mesh.addVertices(vertices); this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 1); this->face_mesh.addIndex(index + 3); this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 2); this->face_mesh.addIndex(index + 3); this->frame_mesh.addIndex(index + 0); this->frame_mesh.addIndex(index + 2); this->frame_mesh.addIndex(index + 1); this->frame_mesh.addIndex(index + 3); } this->frame_mesh.addIndex(start_index + 0); this->frame_mesh.addIndex(start_index + 1); this->frame_mesh.addIndex(this->frame_mesh.getNumVertices() - 1); this->frame_mesh.addIndex(this->frame_mesh.getNumVertices() - 2); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(270); ofSetColor(239); this->face_mesh.drawFaces(); ofSetColor(39); this->frame_mesh.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()); } |