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色。
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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) {}; ofTrueTypeFont font; vector<glm::vec2> font_location_list; vector<glm::vec2> location_list; vector<float> radius_list; vector<float> speed_list; vector<float> max_radius_list; vector<ofColor> color_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(39); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->font.loadFont("fonts/Kazesawa-Bold.ttf", 150, true, true, true); ofFbo fbo; fbo.allocate(ofGetWidth(), ofGetHeight()); fbo.begin(); ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofClear(0); ofSetColor(0); auto word = "COLOR"; font.drawString(word, font.stringWidth(word) * -0.5, font.stringHeight(word) - 240); fbo.end(); auto span = 2; ofPixels pixels; fbo.readToPixels(pixels); for (int x = 0; x < 700; x += span) { for (int y = 0; y < 720; y += span) { ofColor color = pixels.getColor(x, y); if (color != ofColor(0, 0)) { this->font_location_list.push_back(glm::vec3(x - ofGetWidth() * 0.5, y - ofGetHeight() * 0.25, 0)); } } } } //-------------------------------------------------------------- void ofApp::update() { for (int i = this->location_list.size() - 1; i >= 0; i--) { this->radius_list[i] += this->speed_list[i]; if (this->radius_list[i] > this->max_radius_list[i]) { this->location_list.erase(this->location_list.begin() + i); this->radius_list.erase(this->radius_list.begin() + i); this->speed_list.erase(this->speed_list.begin() + i); this->max_radius_list.erase(this->max_radius_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); } } ofColor color; for(int i = 0; i < 15; i++) { int rnd_index = ofRandom(this->font_location_list.size()); auto location = this->font_location_list[rnd_index]; this->location_list.push_back(location); this->radius_list.push_back(1); this->speed_list.push_back(ofRandom(0.05, 0.25)); this->max_radius_list.push_back(ofRandom(5, 15)); color.setHsb(ofRandom(255), 180, 255); this->color_list.push_back(color); } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); for (int i = 0; i < this->location_list.size(); i++) { if (this->radius_list[i] < this->max_radius_list[i] * 0.5) { ofSetColor(this->color_list[i]); } else { ofSetColor(ofColor(this->color_list[i], ofMap(this->radius_list[i], this->max_radius_list[i] * 0.5, this->max_radius_list[i], 255, 0))); } ofDrawCircle(this->location_list[i], this->radius_list[i]); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |