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暴れる輪。
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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) {}; glm::vec3 make_point(float R, float r, float u, float v); ofEasyCam cam; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openframeworks"); ofBackground(0); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateY(ofGetFrameNum() * 0.666666666666 * 2); int v_span = 2; int u_span = 20; int R = 200; ofMesh face, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); for (int v = 0; v < 360; v += v_span) { for (int u = 0; u < 360; u += u_span) { auto noise_value = ofNoise(glm::vec4(this->make_point(R, 10, u, v) * 0.025, ofGetFrameNum() * 0.045)); auto r = noise_value > 0.55 ? ofMap(noise_value, 0.55, 1, 40, 160) : 40; face.addVertex(this->make_point(R, r, u, v)); face.addVertex(this->make_point(R, r, u + u_span, v)); face.addVertex(this->make_point(R, r, u + u_span, v + v_span)); face.addVertex(this->make_point(R, r, u, v + v_span)); line.addVertex(this->make_point(R, r, u, v)); line.addVertex(this->make_point(R, r, u + u_span, v)); line.addVertex(this->make_point(R, r, u + u_span, v + v_span)); line.addVertex(this->make_point(R, r, u, v + v_span)); ofColor face_color = ofColor(0); ofColor line_color = ofColor(255, 0, 255); face.addColor(face_color); face.addColor(face_color); face.addColor(face_color); face.addColor(face_color); line.addColor(line_color); line.addColor(line_color); line.addColor(line_color); line.addColor(line_color); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4); line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 4); line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 4); } } face.drawFaces(); line.drawWireframe(); this->cam.end(); } //-------------------------------------------------------------- glm::vec3 ofApp::make_point(float R, float r, float u, float v) { // 数学デッサン教室 描いて楽しむ数学たち P.31 u *= DEG_TO_RAD; v *= DEG_TO_RAD; auto x = (R + r * cos(u)) * cos(v); auto y = (R + r * cos(u)) * sin(v); auto z = r * sin(u); return glm::vec3(x, y, z); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |