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光の輪っか
Light rings.
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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) {}; int number_of_targets; vector<glm::vec4> targets; float size_start, size_max; vector<float> sizes; ofShader shader; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); this->size_start = 0.001; this->size_max = 0.5; this->number_of_targets = 15; for (int i = 0; i < this->number_of_targets; i++) { glm::vec4 target = glm::vec4(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 0.f, 0.f); this->targets.push_back(target); this->sizes.push_back(ofRandom(this->size_start, this->size_max)); } this->shader.load("shader/shader.vert", "shader/shader.frag"); } //-------------------------------------------------------------- void ofApp::update() { for (int i = 0; i < this->sizes.size(); i++) { if (this->sizes[i] >= this->size_max) { this->targets[i] = glm::vec4(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 0.f, 0.f); this->sizes[i] = this->size_start; } else { this->sizes[i] += 0.01; } } } //-------------------------------------------------------------- void ofApp::draw() { this->shader.begin(); this->shader.setUniform1f("time", ofGetElapsedTimef()); this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight()); this->shader.setUniform4fv("targets", &this->targets[0].x, this->number_of_targets); this->shader.setUniform1fv("sizes", &this->sizes[0], this->number_of_targets); this->shader.setUniform1f("size_max", this->size_max); ofRect(0, 0, ofGetWidth(), ofGetHeight()); this->shader.end(); } //-------------------------------------------------------------- int main() { ofGLWindowSettings settings; settings.setGLVersion(3, 2); settings.setSize(720, 720); ofCreateWindow(settings); ofRunApp(new ofApp()); } |
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#version 150 uniform mat4 modelViewProjectionMatrix; in vec4 position; void main(){ gl_Position = modelViewProjectionMatrix * position; } |
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#version 150 const int number_of_targets = 15; out vec4 outputColor; uniform float time; uniform vec2 resolution; uniform vec4 targets[number_of_targets]; uniform float sizes[number_of_targets]; uniform float size_max; void main() { vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y); vec3 color = vec3(0.0); for(int i = 0; i < number_of_targets; i++){ vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0; t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y); float v = 0.02 * (size_max - sizes[i]) / abs(length(p - t) - sizes[i]); vec3 c = vec3(v); color += c; } outputColor = vec4(color, 1.0); } |