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ブレンドモード：サブトラクト。
BlendMode SUBTRACT.
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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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(255); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_SUBTRACT); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); int radius = 250; float handle_len = radius * 0.5522; int number_of_location = 6; int deg_span = 360 / number_of_location; ofColor color; for (int k = 0; k < 5; k++) { color.setHsb(ofMap(k, 0, 5, 0, 255), 255, 255); ofSetColor(color); vector<glm::vec2> location_list; vector<float> deg_list; for (int deg = 0; deg < 360; deg += deg_span) { location_list.push_back(glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD))); deg_list.push_back(deg + 90); } for (int i = 0; i < location_list.size(); i++) { deg_list[i] += ofMap(ofNoise(glm::vec3(location_list[i] * 0.005, k * 0.03 + ofGetFrameNum() * 0.008)), 0, 1, -120, 120); } ofNoFill(); ofSetLineWidth(2); ofBeginShape(); for (int i = 0; i < location_list.size(); i++) { int n = (i + 1) % location_list.size(); ofVertex(location_list[i]); ofBezierVertex( location_list[i] + glm::vec2(handle_len * cos(deg_list[i] * DEG_TO_RAD), handle_len * sin(deg_list[i] * DEG_TO_RAD)), location_list[n] + glm::vec2(handle_len * cos((deg_list[n] + 180) * DEG_TO_RAD), handle_len * sin((deg_list[n] + 180) * DEG_TO_RAD)), location_list[n]); } ofEndShape(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |