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文字の座標を回転させる。
ofTrueTypeFont.getStringAsPoints()で取得した座標にglm::highp_mat4で回転した座標を計算する。
Rotate the coordinates of a character.
Calculate the coordinates rotated by glm::highp_mat4 to the coordinates retrieved by ofTrueTypeFont.getStringAsPoints().
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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; float font_size; ofTrueTypeFont font; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetColor(39); ofSetLineWidth(1.5); ofEnableDepthTest(); this->font_size = 80; this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(180); string word = "Twisting String"; int sample_count = 180; auto noise_param = ofRandom(1000); auto word_size = this->font.getStringBoundingBox(word, 0, 0); vector<ofPath> word_path = this->font.getStringAsPoints(word, true, false); for (int i = 0; i < 2; i++) { ofRotateX(i * 180); for (int word_index = 0; word_index < word_path.size(); word_index++) { vector<ofPolyline> outline = word_path[word_index].getOutline(); ofBeginShape(); for (int outline_index = 0; outline_index < outline.size(); outline_index++) { if (outline_index != 0) { ofNextContour(true); } auto vertices = outline[outline_index].getResampledByCount(sample_count).getVertices(); for (auto& vertex : vertices) { auto location = vertex - glm::vec3(word_size.getWidth() * 0.5, -word_size.getHeight() * 0.5, 50); auto rotation = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_param, location.x * 0.001 + ofGetFrameNum() * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0)); location = glm::vec4(location, 0) * rotation; ofVertex(location); } } ofEndShape(); } } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |