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赤い球体。
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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) {}; ofEasyCam cam; ofMesh mesh, frame; vector<ofMeshFace> triangle_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(255); ofEnableDepthTest(); auto ico_sphere = ofIcoSpherePrimitive(300, 6); this->triangle_list.insert(this->triangle_list.end(), ico_sphere.getMesh().getUniqueFaces().begin(), ico_sphere.getMesh().getUniqueFaces().end()); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->mesh.clear(); this->frame.clear(); for (float radius = 300; radius > 200; radius -= 80) { auto noise_seed = ofRandom(1000); for (int i = 0; i < this->triangle_list.size(); i++) { glm::vec3 avg = (this->triangle_list[i].getVertex(0) + this->triangle_list[i].getVertex(1) + this->triangle_list[i].getVertex(2)) / 3; auto noise_value = ofNoise(noise_seed + ofGetFrameNum() * 0.005, avg.y * 0.005, avg.x * 0.005, avg.z * 0.005); if (noise_value < 0.5 || noise_value > 0.6) { continue; } if (noise_value < 0.52) { noise_value = 0; } else if (noise_value > 0.58) { noise_value = 1; } else { noise_value = ofMap(noise_value, 0.52, 0.58, 0, 1); } vector<glm::vec3> vertices; vertices.push_back(glm::normalize(this->triangle_list[i].getVertex(0)) * radius); vertices.push_back(glm::normalize(this->triangle_list[i].getVertex(1)) * radius); vertices.push_back(glm::normalize(this->triangle_list[i].getVertex(2)) * radius); this->mesh.addVertices(vertices); this->frame.addVertices(vertices); auto color_value = noise_value < 0.5 ? ofMap(noise_value, 0, 0.5, 512, 0) : ofMap(noise_value, 0.5, 1, 0, 512); for (int k = 0; k < vertices.size(); k++) { this->mesh.addColor(ofColor(200, color_value, color_value, ofMap(radius, 300, 0, 255, 0))); this->frame.addColor(ofColor(200, color_value, color_value, ofMap(radius, 300, 0, 255, 0))); } this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 1); this->frame.addIndex(this->frame.getNumVertices() - 2); this->frame.addIndex(this->frame.getNumVertices() - 2); this->frame.addIndex(this->frame.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 1); } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateY(ofGetFrameNum()); this->mesh.draw(); this->frame.drawWireframe(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |