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直角シフト。
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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::vec2 make_point(int len, int param); }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openframeworks"); ofBackground(39); ofSetLineWidth(3); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000)); for (int k = 0; k < 1; k++) { ofMesh mesh; vector<glm::vec3> right, left, frame; glm::vec3 last_location; float last_theta; for (int i = 0; i < 24; i++) { auto len = ofMap(ofNoise((ofGetFrameNum() + i + k * 10) * 0.04), 0, 1, 200, 500); auto next_len = ofMap(ofNoise((ofGetFrameNum() + i + 1 + k * 10) * 0.04), 0, 1, 200, 500); auto param = ofGetFrameNum() + i; auto next_param = ofGetFrameNum() + i + 1; auto location = glm::vec3(this->make_point(len, param), 0); auto next = glm::vec3(this->make_point(len, next_param), 0); auto direction = next - location; auto theta = atan2(direction.y, direction.x); right.push_back(location + glm::vec3(ofMap(i, 0, 24, 0, 4) * cos(theta + PI * 0.5), ofMap(i, 0, 24, 0, 4) * sin(theta + PI * 0.5), 0)); left.push_back(location + glm::vec3(ofMap(i, 0, 24, 0, 4) * cos(theta - PI * 0.5), ofMap(i, 0, 24, 0, 4) * sin(theta - PI * 0.5), 0)); last_location = location; last_theta = theta; } for (int i = 0; i < right.size(); i++) { mesh.addVertex(left[i]); mesh.addVertex(right[i]); } for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) { mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3); mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3); } mesh.addVertex(last_location); int index = mesh.getNumVertices(); for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) { mesh.addVertex(last_location + glm::vec3(4 * cos(theta), 4 * sin(theta), 0)); frame.push_back(last_location + glm::vec3(4 * cos(theta), 4 * sin(theta), 0)); } for (int i = index; i < mesh.getNumVertices() - 1; i++) { mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1); } reverse(right.begin(), right.end()); ofColor color; for (int i = 0; i < 10; i++) { ofRotate(36); color.setHsb(ofMap(i, 0, 10, 0, 255), 150, 255); ofSetColor(color); ofNoFill(); ofBeginShape(); ofVertices(frame); ofVertices(right); ofVertices(left); ofEndShape(false); } for (int i = 0; i < 10; i++) { ofRotate(36); ofSetColor(39); mesh.draw(); } } } //-------------------------------------------------------------- glm::vec2 ofApp::make_point(int len, int param) { param = param % 100; if (param < 25) { return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5); } else if (param < 50) { return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5)); } else if (param < 75) { return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5); } else { return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5)); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |