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Character mirage.
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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; vector<glm::vec3> location_list; vector<int> param_list; int span, number_of_columns; ofMesh face, line; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetLineWidth(3); ofEnableDepthTest(); ofFbo fbo; fbo.allocate(ofGetWidth(), ofGetHeight()); fbo.begin(); ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofClear(0); ofSetColor(0); ofTrueTypeFont font; font.loadFont("fonts/Kazesawa-Bold.ttf", 300, true, true, true); string word = "A"; font.drawString(word, font.stringWidth(word) * -0.5, font.stringHeight(word)); fbo.end(); this->span = 5; this->number_of_columns = fbo.getWidth() / this->span; ofPixels pixels; fbo.readToPixels(pixels); for (int y = 0; y < fbo.getHeight(); y += span) { for (int x = 0; x < fbo.getWidth(); x += span) { this->location_list.push_back(glm::vec3(x - ofGetWidth() * 0.5, ofGetHeight() - y - ofGetWidth() * 0.25, 0)); ofColor color = pixels.getColor(x, y); if (color != ofColor(0, 0)) { this->param_list.push_back(1); } else { this->param_list.push_back(0); } } } this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->face.clear(); this->line.clear(); float threshold = 0.45; float len_param = 0.005; float frame_param = -0.02; for (int z = -150; z <= 150; z += 150) { auto tmp_location_list = this->location_list; auto noise_seed = ofRandom(1000); for (auto& tmp : tmp_location_list) { tmp += glm::vec3(0, 0, z); } for (int i = 0; i < tmp_location_list.size(); i++) { auto location = tmp_location_list[i]; auto noise_value = ofNoise(noise_seed, location.x * len_param, location.y * len_param + ofGetFrameNum() * frame_param) * this->param_list[i]; if (noise_value < threshold) { continue; } vector<glm::vec3> vertices; vertices.push_back(glm::vec3(location.x - this->span * 0.5, location.y - this->span * 0.5, location.z)); vertices.push_back(glm::vec3(location.x + this->span * 0.5, location.y - this->span * 0.5, location.z)); vertices.push_back(glm::vec3(location.x - this->span * 0.5, location.y + this->span * 0.5, location.z)); vertices.push_back(glm::vec3(location.x + this->span * 0.5, location.y + this->span * 0.5, location.z)); this->face.addVertices(vertices); this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 1); auto tmp_index = i - this->number_of_columns; if (tmp_index < 0 || ofNoise(noise_seed, tmp_location_list[tmp_index].x * len_param, tmp_location_list[tmp_index].y * len_param + ofGetFrameNum() * frame_param) * this->param_list[tmp_index] < threshold) { this->line.addVertex(vertices[2]); this->line.addVertex(vertices[3]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); } tmp_index = i + this->number_of_columns; if (tmp_index > tmp_location_list.size() || ofNoise(noise_seed, tmp_location_list[tmp_index].x * len_param, tmp_location_list[tmp_index].y * len_param + ofGetFrameNum() * frame_param) * this->param_list[tmp_index] < threshold) { this->line.addVertex(vertices[0]); this->line.addVertex(vertices[1]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); } tmp_index = i + 1; if (tmp_index % this->number_of_columns == 0 || ofNoise(noise_seed, tmp_location_list[tmp_index].x * len_param, tmp_location_list[tmp_index].y * len_param + ofGetFrameNum() * frame_param) * this->param_list[tmp_index] < threshold) { this->line.addVertex(vertices[1]); this->line.addVertex(vertices[3]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); } tmp_index = i - 1; if (i % this->number_of_columns == 0 || ofNoise(noise_seed, tmp_location_list[tmp_index].x * len_param, tmp_location_list[tmp_index].y * len_param + ofGetFrameNum() * frame_param) * this->param_list[tmp_index] < threshold) { this->line.addVertex(vertices[0]); this->line.addVertex(vertices[2]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); } } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofSetColor(239); this->face.draw(); ofSetColor(39); this->line.drawWireframe(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |