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ofIcoSphereからofIcoSphere.getMesh()取得したメッシュにofMesh.setVertex(index, vertex)で各頂点を上書きして形を変形させる。
ofMesh.setVertex(index, vertex) is used to overwrite each vertex on the mesh obtained from ofIcoSphere.getMesh() to deform the shape.
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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, draw_mesh, line_mesh; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetLineWidth(2); ofEnableDepthTest(); auto ico_sphere = ofIcoSpherePrimitive(300, 3); this->mesh = ico_sphere.getMesh(); } //-------------------------------------------------------------- void ofApp::update() { this->draw_mesh = this->mesh; this->line_mesh = this->mesh; for (int i = 0; i < this->draw_mesh.getNumVertices(); i++) { glm::vec3 vertex = this->draw_mesh.getVertex(i); auto noise_value = ofNoise(glm::vec4(vertex * 0.005, ofGetFrameNum() * 0.005)); ofColor color = ofColor(239); if (noise_value < 0.5) { if (noise_value < 0.4) { vertex = glm::normalize(vertex) * 0; color = ofColor(0); } else { vertex = glm::normalize(vertex) * ofMap(noise_value, 0.4, 0.5, 0, 300); color = ofColor(ofMap(noise_value, 0.4, 0.5, 0, 239)); } } this->draw_mesh.setVertex(i, vertex); this->line_mesh.setVertex(i, vertex); this->draw_mesh.addColor(color); } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(ofGetFrameNum() * 0.37); ofRotateY(ofGetFrameNum() * 0.72); this->draw_mesh.draw(); ofSetColor(39); this->line_mesh.drawWireframe(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |