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ofIcoSpherePrimitiveから取得した面を、球体の中心からの距離を変化させる。
Vary the distance of the surface obtained from the ofIcoSpherePrimitive from the center of the sphere.
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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(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofEnableDepthTest(); this->ico_sphere = ofIcoSpherePrimitive(65, 2); this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->mesh.clear(); this->frame.clear(); int radius_start = 65; int radius_max = 180; for (auto& triangle : this->ico_sphere.getMesh().getUniqueFaces()) { auto avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3; auto noise_value = ofNoise(glm::vec4(avg * 0.008, ofGetFrameNum() * 0.01)); int radius_end = noise_value > 0.6 ? ofMap(noise_value, 0.6, 1, radius_start, radius_max) : radius_start; 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_max, 0, PI * 0.15); auto angle_x = ofMap(ofNoise(avg.x * 0.8, radius * 0.03 + ofGetFrameNum() * 0.01), 0, 1, -param, param); auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0)); auto angle_y = ofMap(ofNoise(avg.y * 0.8, radius * 0.03 + ofGetFrameNum() * 0.01), 0, 1, -param, param); auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0)); auto angle_z = ofMap(ofNoise(avg.z * 0.8, radius * 0.03 + ofGetFrameNum() * 0.01), 0, 1, -param, param); auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1)); auto loc = glm::normalize(avg) * radius; if (radius == radius_end) { this->mesh.addVertex(glm::vec4(loc + triangle.getVertex(0) - avg, 0) * rotation_z * rotation_y * rotation_x); this->mesh.addVertex(glm::vec4(loc + triangle.getVertex(1) - avg, 0) * rotation_z * rotation_y * rotation_x); this->mesh.addVertex(glm::vec4(loc + triangle.getVertex(2) - avg, 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(); ofRotateX(ofGetFrameNum() * 0.37); ofRotateY(ofGetFrameNum() * 0.72); ofSetColor(239); this->frame.drawWireframe(); this->mesh.drawWireframe(); ofSetColor(0); this->mesh.draw(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |