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ofMeshで画像をねじる。
Twisting image.
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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; ofMesh mesh, draw_mesh; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofEnableDepthTest(); ofPixels pixels; ofLoadImage(pixels, "D:\\lena.png"); int span = 2; for (int x = 0; x < pixels.getWidth(); x += span) { for (int y = 0; y < pixels.getHeight(); y += span) { auto vertex = glm::vec2(x, pixels.getHeight() - y) - glm::vec2(pixels.getWidth() * 0.5, pixels.getHeight() * 0.5); auto color = pixels.getColor(x, y); this->mesh.addVertex(glm::vec3(vertex, 0)); this->mesh.addColor(color); } } int cols = pixels.getWidth() / span; int rows = pixels.getHeight() / span; for (int col = 1; col < cols; col++) { for (int row = 1; row < rows; row++) { this->mesh.addIndex(col + row * cols); this->mesh.addIndex((col - 1) + (row - 1) * cols); this->mesh.addIndex((col - 1) + row * cols); this->mesh.addIndex(col + row * cols); this->mesh.addIndex((col - 1) + (row - 1) * cols); this->mesh.addIndex(col + (row - 1) * cols); } } } //-------------------------------------------------------------- void ofApp::update() { this->draw_mesh = this->mesh; for (auto& vertex : this->draw_mesh.getVertices()) { auto angle_y = ofMap(ofNoise(vertex.y * 0.005 + ofGetFrameNum() * 0.01), 0, 1, -PI * 2, PI * 2); auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0)); vertex = glm::vec4(vertex, 0) * rotation_y; } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); this->draw_mesh.draw(); this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |