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中心から球体の外周まで伸びる線。
A line extending from the center to the outer circumference of the sphere.
[ 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 ico_sphere; ofMesh mesh, frame; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(0.75); ofEnableDepthTest(); this->ico_sphere = ofIcoSpherePrimitive(200, 2); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->mesh.clear(); this->frame.clear(); int radius_start = 0; int radius_end = 250; for (auto& triangle : this->ico_sphere.getMesh().getUniqueFaces()) { auto noise_seed_x = ofRandom(1000); auto noise_seed_y = ofRandom(1000); auto noise_seed_z = ofRandom(1000); auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005); this->frame.addVertex(glm::vec3()); for (int radius = radius_start; radius <= radius_end; radius += 1) { auto mesh_index = this->mesh.getNumVertices(); auto frame_index = this->frame.getNumVertices(); auto param = ofMap(radius, radius_start, radius_end, 0, PI * 0.5); auto angle_x = ofMap(ofNoise(noise_seed_x, radius * 0.001 + ofGetFrameNum() * 0.0005), 0, 1, -param, param); auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0)); auto angle_y = ofMap(ofNoise(noise_seed_y, radius * 0.001 + ofGetFrameNum() * 0.0005), 0, 1, -param, param); auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0)); auto angle_z = ofMap(ofNoise(noise_seed_z, radius * 0.001 + ofGetFrameNum() * 0.0005), 0, 1, -param, param); auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1)); glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3; glm::vec3 loc = glm::normalize(avg) * radius; if (radius == radius_end) { this->mesh.addVertex(glm::vec4(loc + (triangle.getVertex(0) - avg) * 0.2, 0) * rotation_z * rotation_y * rotation_x); this->mesh.addVertex(glm::vec4(loc + (triangle.getVertex(1) - avg) * 0.2, 0) * rotation_z * rotation_y * rotation_x); this->mesh.addVertex(glm::vec4(loc + (triangle.getVertex(2) - avg) * 0.2, 0) * rotation_z * rotation_y * rotation_x); this->mesh.addIndex(mesh_index + 0); this->mesh.addIndex(mesh_index + 1); this->mesh.addIndex(mesh_index + 2); } this->frame.addVertex(glm::vec4(loc, 0) * rotation_z * rotation_y * rotation_x); this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index - 1); } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateY(ofGetFrameNum() * 0.4); ofRotateX(ofGetFrameNum() * 0.25); ofSetColor(0); this->mesh.drawWireframe(); ofSetColor(255); this->mesh.draw(); this->frame.drawWireframe(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |