circle – ページ 108 – プログラミング de 落描き

2018年12月29日

Circle of line. openFrameworks

[ Video ]

[ About ]
線の円

Circle of line.

[ Source ]

#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) {};

	void draw_noise_circle(glm::vec2 location, float radius);
};

#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) {};

void draw_noise_circle(glm::vec2 location, float radius);

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);
	ofSetColor(39);
	ofEnableDepthTest();
}

//--------------------------------------------------------------
void ofApp::update() {

}

//--------------------------------------------------------------
void ofApp::draw() {

	int span = 240;
	for (int x = span * 0.5; x <= ofGetWidth() - span * 0.5; x += span) {

		for (int y = span * 0.5; y <= ofGetHeight() - span * 0.5; y += span) {

			this->draw_noise_circle(glm::vec2(x, y), span * 0.3);
		}
	}
}

//--------------------------------------------------------------
void ofApp::draw_noise_circle(glm::vec2 location, float radius) {

	ofPushMatrix();
	ofTranslate(location);

	float lenght = radius * 0.3;
	for (int deg = 0; deg < 360; deg += 10) {

		glm::vec2 noise_point = location + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

		float tmp_radius = radius + ofMap(ofNoise(noise_point.x * 0.015, noise_point.y * 0.015, ofGetFrameNum() * 0.03), 0, 1, -lenght, lenght);
		glm::vec2 start = glm::vec2((tmp_radius - lenght) * cos(deg * DEG_TO_RAD), (tmp_radius - lenght) * sin(deg * DEG_TO_RAD));
		glm::vec2 end = glm::vec2((tmp_radius + lenght) * cos(deg * DEG_TO_RAD), (tmp_radius + lenght) * sin(deg * DEG_TO_RAD));

		ofDrawLine(start, end);
		ofDrawCircle(start, 3);
		ofDrawCircle(end, 3);
	}

	ofPopMatrix();
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetColor(39);

ofEnableDepthTest();

}

//--------------------------------------------------------------

void ofApp::update() {

}

//--------------------------------------------------------------

void ofApp::draw() {

int span = 240;

for (int x = span * 0.5; x <= ofGetWidth() - span * 0.5; x += span) {

for (int y = span * 0.5; y <= ofGetHeight() - span * 0.5; y += span) {

this->draw_noise_circle(glm::vec2(x, y), span * 0.3);

}

//--------------------------------------------------------------

void ofApp::draw_noise_circle(glm::vec2 location, float radius) {

ofPushMatrix();

ofTranslate(location);

float lenght = radius * 0.3;

for (int deg = 0; deg < 360; deg += 10) {

glm::vec2 noise_point = location + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

float tmp_radius = radius + ofMap(ofNoise(noise_point.x * 0.015, noise_point.y * 0.015, ofGetFrameNum() * 0.03), 0, 1, -lenght, lenght);

glm::vec2 start = glm::vec2((tmp_radius - lenght) * cos(deg * DEG_TO_RAD), (tmp_radius - lenght) * sin(deg * DEG_TO_RAD));

glm::vec2 end = glm::vec2((tmp_radius + lenght) * cos(deg * DEG_TO_RAD), (tmp_radius + lenght) * sin(deg * DEG_TO_RAD));

ofDrawLine(start, end);

ofDrawCircle(start, 3);

ofDrawCircle(end, 3);

}

ofPopMatrix();

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20181229

2018年12月26日2018年12月26日

Parent circle and child circle. openFrameworks

[ Video ]

[ About ]
親サークルと子サークル。昨日、寝る前に頭に降りてきた謎の形状。

Parent circle and child circle. Ideas I came up with in bed.

[ Source ]

#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) {};

	void draw_shape(glm::vec2 location, float radius);
};

#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) {};

void draw_shape(glm::vec2 location, float radius);

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetColor(39);
	ofSetCircleResolution(36);
	ofSetLineWidth(1.5);
}

//--------------------------------------------------------------
void ofApp::update() {

}

//--------------------------------------------------------------
void ofApp::draw() {

	this->draw_shape(glm::vec2(222.5, 497.5), 222.5);
	this->draw_shape(glm::vec2(582.5, 137.5), 137.5);

	this->draw_shape(glm::vec2(137.5, 137.5), 137.5);
	this->draw_shape(glm::vec2(360, 85), 85);
	this->draw_shape(glm::vec2(392.5, 222.5), 52.5);
	this->draw_shape(glm::vec2(307.5, 242.5), 32.5);

	this->draw_shape(glm::vec2(582.5, 582.5), 137.5);
	this->draw_shape(glm::vec2(635, 360), 85);
	this->draw_shape(glm::vec2(497.5, 392.5), 52.5);
	this->draw_shape(glm::vec2(477.5, 307.5), 32.5);

}

//--------------------------------------------------------------
void ofApp::draw_shape(glm::vec2 location, float radius) {

	ofPushMatrix();
	ofTranslate(location);

	ofNoFill();
	ofDrawCircle(glm::vec2(), radius * 0.25);

	int deg_span = 15;
	ofFill();
	for (int deg = 0; deg < 360; deg += deg_span) {

		glm::vec2 start = glm::vec2(radius * 0.25 * cos(deg * DEG_TO_RAD), radius * 0.25 * sin(deg * DEG_TO_RAD));
		float length = ofMap(ofNoise(location.x + start.x * 0.05, location.x + start.y * 0.05, ofGetFrameNum() * 0.01), 0, 1, radius * 0.25, radius );
		glm::vec2 end = glm::normalize(start) * length;

		ofDrawLine(start, end);
		ofDrawCircle(end, glm::length(glm::vec2(length, 0) - glm::vec2(length * cos(deg_span * DEG_TO_RAD), length * sin(deg_span * DEG_TO_RAD))) * 0.5);
	}

	ofPopMatrix();
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofSetCircleResolution(36);

ofSetLineWidth(1.5);

}

//--------------------------------------------------------------

void ofApp::update() {

}

//--------------------------------------------------------------

void ofApp::draw() {

this->draw_shape(glm::vec2(222.5, 497.5), 222.5);

this->draw_shape(glm::vec2(582.5, 137.5), 137.5);

this->draw_shape(glm::vec2(137.5, 137.5), 137.5);

this->draw_shape(glm::vec2(360, 85), 85);

this->draw_shape(glm::vec2(392.5, 222.5), 52.5);

this->draw_shape(glm::vec2(307.5, 242.5), 32.5);

this->draw_shape(glm::vec2(582.5, 582.5), 137.5);

this->draw_shape(glm::vec2(635, 360), 85);

this->draw_shape(glm::vec2(497.5, 392.5), 52.5);

this->draw_shape(glm::vec2(477.5, 307.5), 32.5);

}

//--------------------------------------------------------------

void ofApp::draw_shape(glm::vec2 location, float radius) {

ofPushMatrix();

ofTranslate(location);

ofNoFill();

ofDrawCircle(glm::vec2(), radius * 0.25);

int deg_span = 15;

ofFill();

for (int deg = 0; deg < 360; deg += deg_span) {

glm::vec2 start = glm::vec2(radius * 0.25 * cos(deg * DEG_TO_RAD), radius * 0.25 * sin(deg * DEG_TO_RAD));

float length = ofMap(ofNoise(location.x + start.x * 0.05, location.x + start.y * 0.05, ofGetFrameNum() * 0.01), 0, 1, radius * 0.25, radius );

glm::vec2 end = glm::normalize(start) * length;

ofDrawLine(start, end);

ofDrawCircle(end, glm::length(glm::vec2(length, 0) - glm::vec2(length * cos(deg_span * DEG_TO_RAD), length * sin(deg_span * DEG_TO_RAD))) * 0.5);

}

ofPopMatrix();

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20181226

2018年12月25日2018年12月25日

Flock System Visualize Friendship. openFrameworks

[ Video ]

[ About ]
群れシステムで演算対象となる範囲にある点同士で線を引く

Flock system visualized friendship.

[ Source ]

#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) {};

	int number_of_particle;
	vector<unique_ptr<Particle>> particles;
};

#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) {};

int number_of_particle;

vector<unique_ptr<Particle>> particles;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetColor(39);
	ofSetLineWidth(1.5);

	this->number_of_particle = 200;
	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() {

	for (auto& particle : this->particles) {

		particle->draw(this->particles);
	}
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofSetLineWidth(1.5);

this->number_of_particle = 200;

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() {

for (auto& particle : this->particles) {

particle->draw(this->particles);

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

#pragma once
#include "ofMain.h"

class Particle {
public:
	Particle();
	~Particle();

	void update(vector<unique_ptr<Particle>>& particles);
	void draw(vector<unique_ptr<Particle>>& particles);
	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);

private:
	glm::vec2 location;
	glm::vec2 velocity;
	glm::vec2 acceleration;

	float range;
	float max_force;
	float max_speed;
	int wall;
};

#pragma once

#include "ofMain.h"

class Particle {

public:

Particle();

~Particle();

void update(vector<unique_ptr<Particle>>& particles);

void draw(vector<unique_ptr<Particle>>& particles);

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);

private:

glm::vec2 location;

glm::vec2 velocity;

glm::vec2 acceleration;

float range;

float max_force;

float max_speed;

int wall;

};

#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 = 10;
}

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->acceleration *= 0;
	this->velocity *= 0.9;
}

void Particle::draw(vector<unique_ptr<Particle>>& particles) {

	for (auto& other : particles) {

		glm::vec2 difference = this->location - other->location;
		float len = glm::length(difference);
		if (len > 0 && len < this->range) {

			ofDrawLine(this->location, other->location);
		}
	}

	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;
}

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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 = 10;

}

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->acceleration *= 0;

this->velocity *= 0.9;

}

void Particle::draw(vector<unique_ptr<Particle>>& particles) {

for (auto& other : particles) {

glm::vec2 difference = this->location - other->location;

float len = glm::length(difference);

if (len > 0 && len < this->range) {

ofDrawLine(this->location, other->location);

}

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;

}

[ Link ]
https://github.com/junkiyoshi/Insta20181225

2025年11月
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