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パーティクルをSine関数で移動させる
Particle sine wave.
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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::vec2> targets; vector<glm::vec3> colors; ofShader shader; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); this->number_of_targets = 150; for (int i = 0; i < this->number_of_targets; i++) { this->targets.push_back(glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()))); glm::vec3 color = glm::vec3(1.0, 1.0, 1.0); int color_type = i % 3; switch (color_type) { case 0: color = glm::vec3(1.0, 0.0, 0.0); break; case 1: color = glm::vec3(0.0, 1.0, 0.0); break; case 2: color = glm::vec3(0.0, 0.0, 1.0); break; } this->colors.push_back(color); } this->shader.load("shader/shader.vert", "shader/shader.frag"); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); for (int i = 0; i < this->number_of_targets; i++) { int gap = ofRandom(-80, 80); int speed = ofRandom(5, 10); int x = ((int)ofRandom(ofGetWidth()) + ofGetFrameNum() * speed) % ofGetWidth(); int y = gap + sin(x * 0.005) * ofGetHeight() * 0.4 + ofGetHeight() * 0.5; this->targets[i] = glm::vec2(x, y); } } //-------------------------------------------------------------- void ofApp::draw() { this->shader.begin(); this->shader.setUniform1f("time", ofGetElapsedTimef()); this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight()); this->shader.setUniform2fv("targets", &this->targets[0].x, this->number_of_targets); this->shader.setUniform3fv("colors", &this->colors[0].x, this->number_of_targets); ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight()); this->shader.end(); } //-------------------------------------------------------------- int main() { ofGLWindowSettings settings; settings.setGLVersion(3, 2); settings.setSize(1280, 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 = 150; uniform float time; uniform vec2 resolution; uniform vec2 targets[number_of_targets]; uniform vec3 colors[number_of_targets]; out vec4 outputColor; 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 r = 0.03 / length(p - t) * colors[i].x; float g = 0.03 / length(p - t) * colors[i].y; float b = 0.03 / length(p - t) * colors[i].z; vec3 c = vec3(smoothstep(0.01, 1.0, r), smoothstep(0.01, 1.0, g), smoothstep(0.01, 1.0, b)); color += c; } outputColor = vec4(color, 1.0); } |