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群れシステムの座標をGLSLへ送信。群れになるとピカピカします
Send coordinate of flock system to GLSL. It will be shiny when it comes to flocks.
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#pragma once #include "ofMain.h" #include "Particle.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) {}; ofShader shader; int number_of_particle; vector<unique_ptr<Particle>> particles; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); this->shader.load("shader/shader.vert", "shader/shader.frag"); this->number_of_particle = 50; for (int i = 0; i < this->number_of_particle; i++) { auto particle = make_unique<Particle>(); this->particles.push_back(move(particle)); } } //-------------------------------------------------------------- void ofApp::update() { for (auto& particle : this->particles) { particle->update(this->particles); } } //-------------------------------------------------------------- void ofApp::draw() { vector<glm::vec2> targets; vector<float> force; for (auto& particle : this->particles) { targets.push_back(particle->getLocation()); force.push_back(std::min(ofMap(glm::length(particle->getAcceleration()), 0, 2, 0.2, 1), 1.f)); } this->shader.begin(); this->shader.setUniform1f("time", ofGetElapsedTimef()); this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight()); this->shader.setUniform2fv("targets", &targets[0].x, this->number_of_particle); this->shader.setUniform1fv("force", &force[0], this->number_of_particle); ofDrawRectangle(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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#pragma once #include "ofMain.h" class Particle { public: Particle(); ~Particle(); void update(vector<unique_ptr<Particle>>& particles); void draw(); glm::vec2 separate(vector<unique_ptr<Particle>>& particles); glm::vec2 align(vector<unique_ptr<Particle>>& particles); glm::vec2 cohesion(vector<unique_ptr<Particle>>& particles); glm::vec2 seek(glm::vec2 target); void applyForce(glm::vec2 force); glm::vec2 getLocation(); glm::vec2 getVelocity(); glm::vec2 getAcceleration(); private: glm::vec2 location; glm::vec2 velocity; glm::vec2 acceleration; glm::vec2 prev_acceleration; float range; float max_force; float max_speed; int wall; }; |
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#include "Particle.h" Particle::Particle() { this->location = glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight())); this->velocity = glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1)); this->range = 40; this->max_force = 1; this->max_speed = 8; this->wall = 20; } Particle::~Particle() { } void Particle::update(vector<unique_ptr<Particle>>& particles) { // 分離 glm::vec2 separate = this->separate(particles); this->applyForce(separate); // 整列 glm::vec2 align = this->align(particles); this->applyForce(align); // 結合 glm::vec2 cohesion = this->cohesion(particles); this->applyForce(cohesion); // 自我 if (glm::length(this->velocity) > 0) { glm::vec2 future = glm::normalize(this->velocity) * this->range; future += this->location; float angle = ofRandom(360); glm::vec2 target = future + glm::vec2(this->range * 0.5 * cos(angle * DEG_TO_RAD), this->range * 0.5 * sin(angle * DEG_TO_RAD)); glm::vec2 ego = this->seek(target); this->applyForce(ego); } // 境界 glm::vec2 correction; if (this->location.x < this->wall) { correction += glm::vec2(max_speed, this->velocity.y); } else if(this->location.x > ofGetWidth() - this->wall){ correction += glm::vec2(-max_speed, this->velocity.y); } if (this->location.y < this->wall) { correction += glm::vec2(this->velocity.x, max_speed); } else if (this->location.y > ofGetHeight() - this->wall) { correction += glm::vec2(this->velocity.x, -max_speed); } if (glm::length(correction) > this->max_force) { correction = glm::normalize(correction) * this->max_force; } this->applyForce(correction); // 前進 this->velocity += this->acceleration; if (glm::length(this->velocity) > this->max_speed) { this->velocity = glm::normalize(this->velocity) * this->max_speed; } this->location += this->velocity; this->prev_acceleration = this->acceleration; this->acceleration *= 0; this->velocity *= 0.9; } void Particle::draw() { ofDrawCircle(this->location, 5); } glm::vec2 Particle::separate(vector<unique_ptr<Particle>>& particles) { float tmp_range = this->range * 0.5; glm::vec2 result; glm::vec2 sum; int count = 0; for (auto& other : particles) { glm::vec2 difference = this->location - other->location; float len = glm::length(difference); if (len > 0 && len < tmp_range) { sum += glm::normalize(difference); count++; } } if (count > 0) { glm::vec2 avg = sum / count; avg = avg * this->max_speed; if (glm::length(avg) > this->max_speed) { avg = glm::normalize(avg) * this->max_speed; } glm::vec2 steer = avg - this->velocity; if (glm::length(steer) > this->max_force) { steer = glm::normalize(steer) * this->max_force; } result = steer; } return result; } glm::vec2 Particle::align(vector<unique_ptr<Particle>>& particles) { float tmp_range = this->range; glm::vec2 result; glm::vec2 sum; int count = 0; for (auto& other : particles) { glm::vec2 difference = this->location - other->location; float len = glm::length(difference); if (len > 0 && len < tmp_range) { sum += other->velocity; count++; } } if (count > 0) { glm::vec2 avg = sum / count; avg = avg * this->max_speed; if (glm::length(avg) > this->max_speed) { avg = glm::normalize(avg) * this->max_speed; } glm::vec2 steer = avg - this->velocity; if (glm::length(steer) > this->max_force) { steer = glm::normalize(steer) * this->max_force; } result = steer; } return result; } glm::vec2 Particle::cohesion(vector<unique_ptr<Particle>>& particles) { float tmp_range = this->range * 0.5; glm::vec2 result; glm::vec2 sum; int count = 0; for (auto& other : particles) { glm::vec2 difference = this->location - other->location; float len = glm::length(difference); if (len > 0 && len < tmp_range) { sum += other->location; count++; } } if (count > 0) { result = this->seek(sum / count); } return result; } glm::vec2 Particle::seek(glm::vec2 target) { glm::vec2 desired = target - this->location; float distance = glm::length(desired); desired = glm::normalize(desired); desired *= distance < this->range ? ofMap(distance, 0, this->range, 0, this->max_speed) : max_speed; glm::vec2 steer = desired - this->velocity; if (glm::length(steer) > this->max_force) { steer = glm::normalize(steer) * this->max_force; } return steer; } void Particle::applyForce(glm::vec2 force) { this->acceleration += force; } glm::vec2 Particle::getLocation() { return this->location; } glm::vec2 Particle::getVelocity() { return this->velocity; } glm::vec2 Particle::getAcceleration() { return this->prev_acceleration; } |
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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 = 50; uniform float time; uniform vec2 resolution; uniform vec2 targets[number_of_targets]; uniform float force[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 = 0.02 / length(p - t) * 1.0 * force[i]; float g = 0.02 / length(p - t) * 1.0 * force[i]; float b = 0.02 / length(p - t) * 0.75; vec3 c = vec3(smoothstep(0.03, 1.0, r), smoothstep(0.03, 1.0, g), smoothstep(0.03, 1.0, b)); color += c; } outputColor = vec4(color, 1.0); } |