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四角から円。
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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 mouseEntered(int x, int y) {}; void mouseExited(int x, int y) {}; void windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; glm::vec2 make_point(int len, int param); ofEasyCam cam; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(39); ofSetLineWidth(2); ofNoFill(); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofColor color; for (int base_deg = 0; base_deg < 360; base_deg += 3) { ofPushMatrix(); ofRotateY(base_deg); color.setHsb(ofMap(base_deg, 0, 360, 0, 255), 139, 255); int deg_start = base_deg * 10 + ofGetFrameNum() * 3; for (int deg = deg_start; deg < deg_start + 90; deg += 1) { ofSetColor(color, ofMap(deg, deg_start, deg_start + 90, 0, 255)); int param = ofMap(deg, 0, 360, 0, 100); auto location = glm::vec3(this->make_point(150, param), 230); auto next = glm::vec3(this->make_point(150, param + 1), 230); ofDrawLine(glm::vec3(0, location.x, location.y + 300), glm::vec3(0, next.x, next.y + 300)); } ofPopMatrix(); } this->cam.end(); } //-------------------------------------------------------------- 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()); } |