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球体分裂。
Sphere split.
[ 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) {}; ofEasyCam cam; ofIcoSpherePrimitive sphere; ofMesh mesh, frame; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofEnableDepthTest(); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { int anime_rate = 90; auto param = ofGetFrameNum() % anime_rate; int radius = 300; int iterations = (ofGetFrameNum() % (anime_rate * 4)) / anime_rate; this->sphere = ofIcoSpherePrimitive(radius, iterations); this->mesh.clear(); this->frame.clear(); auto anime_param = 0.f; if (param > anime_rate * 0.4 && param <= anime_rate * 0.5) { anime_param = ofMap(param, anime_rate * 0.4, anime_rate * 0.5, 0, 1); } else if (param > anime_rate * 0.5 && param <= anime_rate * 0.9) { anime_param = 1; } else if (param > anime_rate * 0.9 && param <= anime_rate) { anime_param = ofMap(param, anime_rate * 0.9, anime_rate, 1, 0); } int radius_start = 65; int radius_max = 180; for (auto& triangle : this->sphere.getMesh().getUniqueFaces()) { auto mesh_index = this->mesh.getNumVertices(); auto frame_index = this->frame.getNumVertices(); glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3; auto noise_value = ofNoise(avg); auto noise_location = avg + (avg * noise_value * anime_param); this->mesh.addVertex(noise_location + triangle.getVertex(0) - avg); this->mesh.addVertex(noise_location + triangle.getVertex(1) - avg); this->mesh.addVertex(noise_location + triangle.getVertex(2) - avg); this->mesh.addIndex(mesh_index + 0); this->mesh.addIndex(mesh_index + 1); this->mesh.addIndex(mesh_index + 2); this->frame.addVertex(glm::vec3()); this->frame.addVertex(noise_location); this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index + 1); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(ofGetFrameNum() * 0.5); ofRotateY(ofGetFrameNum() * 0.32); ofSetColor(39); ofSetLineWidth(3); this->mesh.drawWireframe(); ofSetColor(89); ofSetLineWidth(1.5); this->frame.drawWireframe(); ofSetColor(239); this->mesh.draw(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |