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欠けているトーラスをグラデーションで色付けする。
Color the missing torus with a gradient.
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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(60); ofSetWindowTitle("openframeworks"); ofBackground(255); ofSetColor(255); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); int count = 0; for (int x = -300; x <= 300; x += 600) { for (int y = -300; y <= 300; y += 600) { ofPushMatrix(); ofTranslate(x, y, 0); ofRotateY(count++ * 45 + ofGetFrameNum()); for (int r = 60; r <= 90; r += 30) { int v_span = 1; int u_span = 60; ofMesh face, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); for (int v = 0; v <= 360; v += v_span) { bool flag = true; int u_start = ofMap(ofNoise(r * cos(v * DEG_TO_RAD) * 0.008, r * sin(v * DEG_TO_RAD) * 0.008, ofGetFrameNum() * 0.0035), 0, 1, -360, 360); int next_u = ofMap(ofNoise(r * cos((v + v_span) * DEG_TO_RAD) * 0.008, r * sin((v + v_span) * DEG_TO_RAD) * 0.008, ofGetFrameNum() * 0.0035), 0, 1, -360, 360); for (int u = u_start; u < u_start + 360; u += u_span) { if (flag) { face.addVertex(this->make_point(200, r, u, v)); face.addVertex(this->make_point(200, r, u + u_span, v)); face.addVertex(this->make_point(200, r, next_u + u_span, v + v_span)); face.addVertex(this->make_point(200, r, next_u, v + v_span)); line.addVertex(this->make_point(200, r, u, v)); line.addVertex(this->make_point(200, r, u + u_span, v)); line.addVertex(this->make_point(200, r, next_u + u_span, v + v_span)); line.addVertex(this->make_point(200, r, next_u, v + v_span)); ofColor color; auto hue = (count * 64 + r * 4 + (int)ofMap(v, 0, 360, 0, 255)) % 255; color.setHsb(hue, 180, 255); face.addColor(color); face.addColor(color); face.addColor(color); face.addColor(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); } next_u += u_span; flag = !flag; } } face.drawFaces(); line.drawWireframe(); } ofPopMatrix(); } } 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()); } |