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螺旋輪。
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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) {}; ofEasyCam cam; ofMesh face, line; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(39); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); ofEnableDepthTest(); this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->face.clear(); this->line.clear(); auto deg_width = 6; auto deg_span = 6; auto height_span = 10; auto max_height = 2000; ofColor face_color, line_color; auto radius = 300; auto frame_step = 0.02; auto threshold = 0.2; for (auto deg_start = 0; deg_start < 360; deg_start += deg_width + 1) { ofColor color; color.setHsb(ofMap(deg_start, 0, 360, 0, 255), 255, 255); face_color = ofColor(0); line_color = ofColor(color); auto deg = deg_start; auto noise_seed = ofRandom(1000); for (auto height = 0; height < max_height; height += height_span) { auto prev_noise_value = ofNoise(noise_seed * cos(deg_start * DEG_TO_RAD) * 0.0015, noise_seed * sin(deg_start * DEG_TO_RAD) * 0.0015, (height - height_span) * 0.0005 + ofGetFrameNum() * frame_step); auto noise_value = ofNoise(noise_seed * cos(deg_start * DEG_TO_RAD) * 0.0015, noise_seed * sin(deg_start * DEG_TO_RAD) * 0.0015, height * 0.0005 + ofGetFrameNum() * frame_step); auto next_noise_value = ofNoise(noise_seed * cos(deg_start * DEG_TO_RAD) * 0.0015, noise_seed * sin(deg_start * DEG_TO_RAD) * 0.0015, (height + height_span) * 0.0005 + ofGetFrameNum() * frame_step); if (noise_value < threshold) { this->face.addVertex(glm::vec3(radius * cos((deg)*DEG_TO_RAD), height, radius * sin((deg)*DEG_TO_RAD))); this->face.addVertex(glm::vec3(radius * cos((deg + deg_width) * DEG_TO_RAD), height, radius * sin((deg + deg_width) * DEG_TO_RAD))); this->face.addVertex(glm::vec3(radius * cos((deg + deg_span + deg_width) * DEG_TO_RAD), height + height_span, radius * sin((deg + deg_span + deg_width) * DEG_TO_RAD))); this->face.addVertex(glm::vec3(radius * cos((deg + deg_span) * DEG_TO_RAD), height + height_span, radius * sin((deg + deg_span) * DEG_TO_RAD))); this->line.addVertex(glm::vec3(radius * cos((deg)*DEG_TO_RAD), height, radius * sin((deg)*DEG_TO_RAD))); this->line.addVertex(glm::vec3(radius * cos((deg + deg_width) * DEG_TO_RAD), height, radius * sin((deg + deg_width) * DEG_TO_RAD))); this->line.addVertex(glm::vec3(radius * cos((deg + deg_span + deg_width) * DEG_TO_RAD), height + height_span, radius * sin((deg + deg_span + deg_width) * DEG_TO_RAD))); this->line.addVertex(glm::vec3(radius * cos((deg + deg_span) * DEG_TO_RAD), height + height_span, radius * sin((deg + deg_span) * DEG_TO_RAD))); for (int i = 0; i < 4; i++) { this->face.addColor(face_color); this->line.addColor(line_color); } this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 4); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 4); this->line.addIndex(this->line.getNumVertices() - 2); this->line.addIndex(this->line.getNumVertices() - 3); if (height >= max_height - height_span || next_noise_value > threshold) { this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); } if (height < height_span || prev_noise_value > threshold) { this->line.addIndex(this->line.getNumVertices() - 3); this->line.addIndex(this->line.getNumVertices() - 4); } } deg += deg_span; } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(180); ofTranslate(0, -1000, 0); this->face.drawFaces(); this->line.drawWireframe(); this->cam.end(); /* int start = 220; if (ofGetFrameNum() > start) { ostringstream os; os << setw(4) << setfill('0') << ofGetFrameNum() - start; ofImage image; image.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); image.saveImage("image/cap/img_" + os.str() + ".jpg"); if (ofGetFrameNum() - start >= 25 * 20) { std::exit(1); } } */ } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |