openFrameworks – ページ 365 – プログラミング de 落描き

2021年11月23日

Colorful waterfall. Draw by openFrameworks

[ Video ]

[ About ]
色をHSBで指定して、HUEをフレーム番号で変化させる。

Specify the color by HSB, and change the HUE by frame number.

[ 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) {};

	vector<glm::vec3> base_location_list;
	vector<ofColor> base_color_list;

	vector<vector<glm::vec2>> log_list;
	vector<ofColor> color_list;
	vector<float> life_list;

	float base_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) {};

vector<glm::vec3> base_location_list;

vector<ofColor> base_color_list;

vector<vector<glm::vec2>> log_list;

vector<ofColor> color_list;

vector<float> life_list;

float base_radius;

};

#include "ofApp.h"	

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openFrameworks");

	ofBackground(0);
	ofNoFill();
	ofSetLineWidth(1.5);
	ofSetCircleResolution(60);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	this->base_radius = 150;
	for (int deg = 0; deg < 360; deg++) {

		this->base_location_list.push_back(glm::vec3(this->base_radius * cos(deg * DEG_TO_RAD), this->base_radius * sin(deg * DEG_TO_RAD) - 150, 0));
	}
}

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


	int radius = 6;
	ofColor color;
	while (this->log_list.size() < 800) {

		int font_location_index = ofRandom(this->base_location_list.size());
		vector<glm::vec2> log;
		log.push_back(this->base_location_list[font_location_index]);
		this->log_list.push_back(log);

		color.setHsb((ofGetFrameNum() * 2) % 255, 200, 100);
		this->color_list.push_back(color);

		this->life_list.push_back(ofRandom(10, 200));
	}

	for (int i = this->log_list.size() - 1; i >= 0; i--) {

		this->life_list[i] -= 1;
		if (this->life_list[i] < 0) {

			this->log_list.erase(this->log_list.begin() + i);
			this->color_list.erase(this->color_list.begin() + i);
			this->life_list.erase(this->life_list.begin() + i);

			continue;
		}

		auto deg = ofMap(ofNoise(glm::vec3(this->log_list[i].back() * 0.008, ofGetFrameNum() * 0.0015)), 0, 1, 45, 125 + 10);
		this->log_list[i].push_back(this->log_list[i].back() + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));
		while (this->log_list[i].size() > 100) {

			this->log_list[i].erase(this->log_list[i].begin());
		}
	}
}

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

	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

	for (int i = 0; i < this->log_list.size(); i++) {

		ofSetColor(this->color_list[i], this->life_list[i] > 30 ? 255 : ofMap(this->life_list[i], 0, 30, 0, 255));

		ofBeginShape();
		ofVertices(this->log_list[i]);
		ofEndShape();
	}	

	ofSetColor(255);
	ofDrawCircle(glm::vec3(0, -150, 0), 150);
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofNoFill();

ofSetLineWidth(1.5);

ofSetCircleResolution(60);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

this->base_radius = 150;

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

this->base_location_list.push_back(glm::vec3(this->base_radius * cos(deg * DEG_TO_RAD), this->base_radius * sin(deg * DEG_TO_RAD) - 150, 0));

}

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

void ofApp::update() {

int radius = 6;

ofColor color;

while (this->log_list.size() < 800) {

int font_location_index = ofRandom(this->base_location_list.size());

vector<glm::vec2> log;

log.push_back(this->base_location_list[font_location_index]);

this->log_list.push_back(log);

color.setHsb((ofGetFrameNum() * 2) % 255, 200, 100);

this->color_list.push_back(color);

this->life_list.push_back(ofRandom(10, 200));

}

for (int i = this->log_list.size() - 1; i >= 0; i--) {

this->life_list[i] -= 1;

if (this->life_list[i] < 0) {

this->log_list.erase(this->log_list.begin() + i);

this->color_list.erase(this->color_list.begin() + i);

this->life_list.erase(this->life_list.begin() + i);

continue;

}

auto deg = ofMap(ofNoise(glm::vec3(this->log_list[i].back() * 0.008, ofGetFrameNum() * 0.0015)), 0, 1, 45, 125 + 10);

this->log_list[i].push_back(this->log_list[i].back() + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

while (this->log_list[i].size() > 100) {

this->log_list[i].erase(this->log_list[i].begin());

}

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

void ofApp::draw() {

ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

for (int i = 0; i < this->log_list.size(); i++) {

ofSetColor(this->color_list[i], this->life_list[i] > 30 ? 255 : ofMap(this->life_list[i], 0, 30, 0, 255));

ofBeginShape();

ofVertices(this->log_list[i]);

ofEndShape();

}

ofSetColor(255);

ofDrawCircle(glm::vec3(0, -150, 0), 150);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211123

[ほしいものリスト]
Amazon

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2021年11月22日2021年11月22日

Rotating Fractal Fern Leaves. Draw by openFrameworks

[ Video ]

[ About ]
Processing Advent Calendar 2018の記事を再度、参照。

Once again, I referred to the Processing Advent Calendar 2018 article.

IFSを使ってフラクタルを書く
https://qiita.com/EKey2210/items/d13dcec6ac650b5cb0c5

[ 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 set_three(glm::vec3 location, int number_of_loop, float scale);

	ofEasyCam cam;

	ofMesh mesh;
};

#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 set_three(glm::vec3 location, int number_of_loop, float scale);

ofEasyCam cam;

ofMesh mesh;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetColor(255);
}

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

	ofSeedRandom(39);

	this->mesh.clear();

	for (float x = -0.25; x <= 0.25; x += 0.25) {

		for (float y = -0.33; y <= 0.33; y += 0.33) {

			this->set_three(glm::vec3(x * ofGetWidth(), y * ofGetHeight(), 0), 7000, 23);
		}
	}
}

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

	this->cam.begin();

	this->mesh.drawVertices();

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::set_three(glm::vec3 location, int number_of_loop, float scale) {

	glm::vec3 point, prev_point;
	for (int i = 0; i < number_of_loop; i++) {

		float p = ofRandom(100);
		if (p < 1) {

			point.x = 0 * prev_point.x + 0 * prev_point.y + 0;
			point.y = 0 * prev_point.x + 0.16 * prev_point.y + 0;
		}
		else if (p < 8) {

			point.x = 0.2 * prev_point.x + -0.26 * prev_point.y + 0.0;
			point.y = 0.23 * prev_point.x + 0.22 * prev_point.y + 1.6;
		}
		else if (p < 15) {

			point.x = -0.15 * prev_point.x + 0.28 * prev_point.y + 0.0;
			point.y = 0.26 * prev_point.x + 0.24 * prev_point.y + 0.44;
		}
		else {

			point.x = 0.85 * prev_point.x + 0.04 * prev_point.y + 0.0;
			point.y = -0.04 * prev_point.x + 0.85 * prev_point.y + 1.5;
		}
		
		auto noise_value = ofNoise(glm::vec2((location.x + point.x) * 0.01, (location.y + point.y) * 0.1 + ofGetFrameNum() * 0.0035));

		if (noise_value < 0.35) {

			noise_value = 0;
		}
		else if(noise_value < 0.75) {

			noise_value = ofMap(noise_value, 0.35, 0.75, 0, 1);
		}
		else {

			noise_value = 1;
		}

		auto rotation_x = glm::rotate(glm::mat4(), ofMap(noise_value, 0, 1, -360, 360) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
		auto vertex = glm::vec4(point, 0) * rotation_x;

		this->mesh.addVertex(location + vertex * scale);
		prev_point = point;
	}
	
}


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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetColor(255);

}

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

void ofApp::update() {

ofSeedRandom(39);

this->mesh.clear();

for (float x = -0.25; x <= 0.25; x += 0.25) {

for (float y = -0.33; y <= 0.33; y += 0.33) {

this->set_three(glm::vec3(x * ofGetWidth(), y * ofGetHeight(), 0), 7000, 23);

}

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

void ofApp::draw() {

this->cam.begin();

this->mesh.drawVertices();

this->cam.end();

}

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

void ofApp::set_three(glm::vec3 location, int number_of_loop, float scale) {

glm::vec3 point, prev_point;

for (int i = 0; i < number_of_loop; i++) {

float p = ofRandom(100);

if (p < 1) {

point.x = 0 * prev_point.x + 0 * prev_point.y + 0;

point.y = 0 * prev_point.x + 0.16 * prev_point.y + 0;

}

else if (p < 8) {

point.x = 0.2 * prev_point.x + -0.26 * prev_point.y + 0.0;

point.y = 0.23 * prev_point.x + 0.22 * prev_point.y + 1.6;

}

else if (p < 15) {

point.x = -0.15 * prev_point.x + 0.28 * prev_point.y + 0.0;

point.y = 0.26 * prev_point.x + 0.24 * prev_point.y + 0.44;

}

else {

point.x = 0.85 * prev_point.x + 0.04 * prev_point.y + 0.0;

point.y = -0.04 * prev_point.x + 0.85 * prev_point.y + 1.5;

}

auto noise_value = ofNoise(glm::vec2((location.x + point.x) * 0.01, (location.y + point.y) * 0.1 + ofGetFrameNum() * 0.0035));

if (noise_value < 0.35) {

noise_value = 0;

}

else if(noise_value < 0.75) {

noise_value = ofMap(noise_value, 0.35, 0.75, 0, 1);

}

else {

noise_value = 1;

}

auto rotation_x = glm::rotate(glm::mat4(), ofMap(noise_value, 0, 1, -360, 360) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

auto vertex = glm::vec4(point, 0) * rotation_x;

this->mesh.addVertex(location + vertex * scale);

prev_point = point;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Install20211122

[ほしいものリスト]
Amazon

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2021年11月21日

House of random walkers. Draw by openFrameworks

[ Video ]

[ About ]
エリアごとにランダムウォークの集団。

A group of random walkers in each area.

[ 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 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) {};

	ofEasyCam cam;

	vector<glm::vec3> base_location_list;

	vector<pair<glm::vec3, float>> sphere_list; //  Location, size
	int number_of_sphere;

	vector<ofMeshFace> triangle_list;
	ofMesh mesh, frame, random_walker, walker_head;
};

#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) {};

ofEasyCam cam;

vector<glm::vec3> base_location_list;

vector<pair<glm::vec3, float>> sphere_list; // Location, size

int number_of_sphere;

vector<ofMeshFace> triangle_list;

ofMesh mesh, frame, random_walker, walker_head;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openFrameworks");

	ofBackground(0);
	ofEnableDepthTest();

	auto ico_sphere = ofIcoSpherePrimitive(1, 5);
	this->base_location_list = ico_sphere.getMesh().getVertices();

	this->number_of_sphere = 30;
	while (this->sphere_list.size() < this->number_of_sphere) {

		int index = ofRandom(this->base_location_list.size());
		auto tmp_location = this->base_location_list[index];
		tmp_location = glm::normalize(tmp_location) * ofRandom(0, 110);

		auto radius = this->sphere_list.size() < 30 ? ofRandom(20, 50) : ofRandom(2, 20);

		bool flag = true;
		for (int i = 0; i < this->sphere_list.size(); i++) {

			if (glm::distance(tmp_location, get<0>(this->sphere_list[i])) < get<1>(this->sphere_list[i]) + radius) {

				flag = false;
				break;
			}
		}

		if (flag) {

			auto size = (radius * 2) / sqrt(3);
			this->sphere_list.push_back(make_pair(tmp_location, size));
		}
	}

	ico_sphere = ofIcoSpherePrimitive(300, 3);
	this->triangle_list.insert(this->triangle_list.end(), ico_sphere.getMesh().getUniqueFaces().begin(), ico_sphere.getMesh().getUniqueFaces().end());

	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	this->random_walker.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}

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

	ofSeedRandom(39);

	this->mesh.clear();
	this->frame.clear();
	this->random_walker.clear();
	this->walker_head.clear();

	for (int i = 0; i < this->sphere_list.size(); i++) {

		auto location = get<0>(this->sphere_list[i]);
		auto radius = get<1>(this->sphere_list[i]) * 0.95;

		for (int k = 0; k < this->triangle_list.size(); k++) {

			glm::vec3 avg = (this->triangle_list[k].getVertex(0) + this->triangle_list[k].getVertex(1) + this->triangle_list[k].getVertex(2)) / 3;
			auto noise_value = ofNoise(glm::vec3(location * 0.1 + avg * 0.005));

			if (noise_value < 0.6) {

				continue;
			}

			vector<glm::vec3> vertices;

			vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(0)) * (radius + 1) - avg);
			vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(1)) * (radius + 1) - avg);
			vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(2)) * (radius + 1) - avg);

			vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(0)) * (radius) - avg);
			vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(1)) * (radius) - avg);
			vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(2)) * (radius) - avg);

			for (auto& vertex : vertices) {

				vertex += avg + location;
			}

			this->mesh.addVertices(vertices);
			this->frame.addVertices(vertices);

			this->mesh.addColor(ofColor(0));
			this->mesh.addColor(ofColor(0));
			this->mesh.addColor(ofColor(0));

			this->mesh.addColor(ofColor(0));
			this->mesh.addColor(ofColor(0));
			this->mesh.addColor(ofColor(0));

			this->frame.addColor(ofColor(255, 64));
			this->frame.addColor(ofColor(255, 64));
			this->frame.addColor(ofColor(255, 64));

			this->frame.addColor(ofColor(255, 64));
			this->frame.addColor(ofColor(255, 64));
			this->frame.addColor(ofColor(255, 64));

			this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 3);
			this->mesh.addTriangle(this->mesh.getNumVertices() - 4, this->mesh.getNumVertices() - 5, this->mesh.getNumVertices() - 6);

			this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 5);
			this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 5, this->mesh.getNumVertices() - 4);

			this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 3, this->mesh.getNumVertices() - 6);
			this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 6, this->mesh.getNumVertices() - 4);

			this->mesh.addTriangle(this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 3, this->mesh.getNumVertices() - 6);
			this->mesh.addTriangle(this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 6, this->mesh.getNumVertices() - 5);

			this->frame.addIndex(this->frame.getNumVertices() - 1); this->frame.addIndex(this->frame.getNumVertices() - 2);
			this->frame.addIndex(this->frame.getNumVertices() - 2); this->frame.addIndex(this->frame.getNumVertices() - 3);
			this->frame.addIndex(this->frame.getNumVertices() - 1); this->frame.addIndex(this->frame.getNumVertices() - 3);

			this->frame.addIndex(this->frame.getNumVertices() - 4); this->frame.addIndex(this->frame.getNumVertices() - 5);
			this->frame.addIndex(this->frame.getNumVertices() - 5); this->frame.addIndex(this->frame.getNumVertices() - 6);
			this->frame.addIndex(this->frame.getNumVertices() - 4); this->frame.addIndex(this->frame.getNumVertices() - 6);

			this->frame.addIndex(this->frame.getNumVertices() - 1); this->frame.addIndex(this->frame.getNumVertices() - 4);
			this->frame.addIndex(this->frame.getNumVertices() - 2); this->frame.addIndex(this->frame.getNumVertices() - 5);
			this->frame.addIndex(this->frame.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 6);
		}

		ofColor color;
		for (int k = 0; k < radius * 0.5; k++) {

			int param = int(ofRandom(120) + ofGetFrameNum()) % 120;
			int len = param < 60 ? ofMap(param, 0, 60, 30, 1) : ofMap(param, 60, 120, 1, 30);
			color.setHsb(ofRandom(255), 230, 255);
			auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));

			for (int m = 0; m < 30; m++) {
				
				if (m > len) {

					continue;
				}

				auto vertex = glm::vec3(
					ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + m) * 0.005), 0, 1, -radius * 0.75, radius * 0.75),
					ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + m) * 0.005), 0, 1, -radius * 0.75, radius * 0.75),
					ofMap(ofNoise(noise_seed.z, (ofGetFrameNum() + m) * 0.005), 0, 1, -radius * 0.75, radius * 0.75));

				this->random_walker.addVertex(location + vertex);
				this->random_walker.addColor(color);
				if (m > 0) {

					this->random_walker.addIndex(this->random_walker.getNumVertices() - 1);
					this->random_walker.addIndex(this->random_walker.getNumVertices() - 2);
				}

				if (m == 0 | m == len) {

					this->walker_head.addVertex(location + vertex);
					this->walker_head.addColor(color);
				}
			}

		}
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.2);

	ofSetLineWidth(2);

	this->mesh.drawFaces();
	this->frame.drawWireframe();
	this->random_walker.drawWireframe();

	ofSetLineWidth(1);

	for (int i = 0; i < this->walker_head.getNumVertices(); i++) {

		ofSetColor(this->walker_head.getColor(i));
		ofDrawSphere(this->walker_head.getVertex(i), 1);
	}

	this->cam.end();
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofEnableDepthTest();

auto ico_sphere = ofIcoSpherePrimitive(1, 5);

this->base_location_list = ico_sphere.getMesh().getVertices();

this->number_of_sphere = 30;

while (this->sphere_list.size() < this->number_of_sphere) {

int index = ofRandom(this->base_location_list.size());

auto tmp_location = this->base_location_list[index];

tmp_location = glm::normalize(tmp_location) * ofRandom(0, 110);

auto radius = this->sphere_list.size() < 30 ? ofRandom(20, 50) : ofRandom(2, 20);

bool flag = true;

for (int i = 0; i < this->sphere_list.size(); i++) {

if (glm::distance(tmp_location, get<0>(this->sphere_list[i])) < get<1>(this->sphere_list[i]) + radius) {

flag = false;

break;

}

if (flag) {

auto size = (radius * 2) / sqrt(3);

this->sphere_list.push_back(make_pair(tmp_location, size));

}

ico_sphere = ofIcoSpherePrimitive(300, 3);

this->triangle_list.insert(this->triangle_list.end(), ico_sphere.getMesh().getUniqueFaces().begin(), ico_sphere.getMesh().getUniqueFaces().end());

this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

this->random_walker.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

}

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

void ofApp::update() {

ofSeedRandom(39);

this->mesh.clear();

this->frame.clear();

this->random_walker.clear();

this->walker_head.clear();

for (int i = 0; i < this->sphere_list.size(); i++) {

auto location = get<0>(this->sphere_list[i]);

auto radius = get<1>(this->sphere_list[i]) * 0.95;

for (int k = 0; k < this->triangle_list.size(); k++) {

glm::vec3 avg = (this->triangle_list[k].getVertex(0) + this->triangle_list[k].getVertex(1) + this->triangle_list[k].getVertex(2)) / 3;

auto noise_value = ofNoise(glm::vec3(location * 0.1 + avg * 0.005));

if (noise_value < 0.6) {

continue;

}

vector<glm::vec3> vertices;

vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(0)) * (radius + 1) - avg);

vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(1)) * (radius + 1) - avg);

vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(2)) * (radius + 1) - avg);

vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(0)) * (radius) - avg);

vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(1)) * (radius) - avg);

vertices.push_back(glm::normalize(this->triangle_list[k].getVertex(2)) * (radius) - avg);

for (auto& vertex : vertices) {

vertex += avg + location;

}

this->mesh.addVertices(vertices);

this->frame.addVertices(vertices);

this->mesh.addColor(ofColor(0));

this->frame.addColor(ofColor(255, 64));

this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 3);

this->mesh.addTriangle(this->mesh.getNumVertices() - 4, this->mesh.getNumVertices() - 5, this->mesh.getNumVertices() - 6);

this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 5);

this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 5, this->mesh.getNumVertices() - 4);

this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 3, this->mesh.getNumVertices() - 6);

this->mesh.addTriangle(this->mesh.getNumVertices() - 1, this->mesh.getNumVertices() - 6, this->mesh.getNumVertices() - 4);

this->mesh.addTriangle(this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 3, this->mesh.getNumVertices() - 6);

this->mesh.addTriangle(this->mesh.getNumVertices() - 2, this->mesh.getNumVertices() - 6, this->mesh.getNumVertices() - 5);

this->frame.addIndex(this->frame.getNumVertices() - 1); this->frame.addIndex(this->frame.getNumVertices() - 2);

this->frame.addIndex(this->frame.getNumVertices() - 2); this->frame.addIndex(this->frame.getNumVertices() - 3);

this->frame.addIndex(this->frame.getNumVertices() - 1); this->frame.addIndex(this->frame.getNumVertices() - 3);

this->frame.addIndex(this->frame.getNumVertices() - 4); this->frame.addIndex(this->frame.getNumVertices() - 5);

this->frame.addIndex(this->frame.getNumVertices() - 5); this->frame.addIndex(this->frame.getNumVertices() - 6);

this->frame.addIndex(this->frame.getNumVertices() - 4); this->frame.addIndex(this->frame.getNumVertices() - 6);

this->frame.addIndex(this->frame.getNumVertices() - 1); this->frame.addIndex(this->frame.getNumVertices() - 4);

this->frame.addIndex(this->frame.getNumVertices() - 2); this->frame.addIndex(this->frame.getNumVertices() - 5);

this->frame.addIndex(this->frame.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 6);

}

ofColor color;

for (int k = 0; k < radius * 0.5; k++) {

int param = int(ofRandom(120) + ofGetFrameNum()) % 120;

int len = param < 60 ? ofMap(param, 0, 60, 30, 1) : ofMap(param, 60, 120, 1, 30);

color.setHsb(ofRandom(255), 230, 255);

auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));

for (int m = 0; m < 30; m++) {

if (m > len) {

continue;

}

auto vertex = glm::vec3(

ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + m) * 0.005), 0, 1, -radius * 0.75, radius * 0.75),

ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + m) * 0.005), 0, 1, -radius * 0.75, radius * 0.75),

ofMap(ofNoise(noise_seed.z, (ofGetFrameNum() + m) * 0.005), 0, 1, -radius * 0.75, radius * 0.75));

this->random_walker.addVertex(location + vertex);

this->random_walker.addColor(color);

if (m > 0) {

this->random_walker.addIndex(this->random_walker.getNumVertices() - 1);

this->random_walker.addIndex(this->random_walker.getNumVertices() - 2);

}

if (m == 0 | m == len) {

this->walker_head.addVertex(location + vertex);

this->walker_head.addColor(color);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.2);

ofSetLineWidth(2);

this->mesh.drawFaces();

this->frame.drawWireframe();

this->random_walker.drawWireframe();

ofSetLineWidth(1);

for (int i = 0; i < this->walker_head.getNumVertices(); i++) {

ofSetColor(this->walker_head.getColor(i));

ofDrawSphere(this->walker_head.getVertex(i), 1);

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211121

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