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文字の座標を2回に分けて回転させる。
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 twice.
Calculate the coordinates rotated by glm::highp_mat4 to the coordinates retrieved by ofTrueTypeFont.getStringAsPoints().
[ Source ]
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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 = "ABCDEFGHEJKLMNOPQRSTUVWXYZ!"; int sample_count = 180; auto noise_param = ofRandom(1000); for (int i = 0; i < word.size(); i++) { ofPath chara_path = this->font.getCharacterAsPoints(word[i], true, false); vector<ofPolyline> outline = chara_path.getOutline(); ofFill(); 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(this->font_size * 0.5, this->font_size * -0.5, 320); auto rotation_y = glm::rotate(glm::mat4(), (i * 13.5f) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0)); location = glm::vec4(location, 0) * rotation_y; auto noise_value = ofNoise(location.x * 0.002, ofGetFrameNum() * 0.005); float param = 0.5; if (noise_value < 0.3) { param = ofMap(noise_value, 0, 0.3, 0, 0.5); } if (noise_value > 0.7) { param = ofMap(noise_value, 0.7, 1, 0.5, 1); } auto rotation_x = glm::rotate(glm::mat4(), ofMap(param, 0, 1, -PI * 1, PI * 1), glm::vec3(1, 0, 0)); location = glm::vec4(location, 0) * rotation_x; ofVertex(location); } } ofEndShape(); ofNoFill(); 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(this->font_size * 0.5, this->font_size * -0.5, 320); auto rotation_y = glm::rotate(glm::mat4(), (i * 13.5f) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0)); location = glm::vec4(location, 0) * rotation_y; ofVertex(location); } } ofEndShape(); } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |