noise – ページ 215 – プログラミング de 落描き

2020年12月6日

Heart pounding. Draw by openFrameworks

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[ About ]
ドキドキ。

Heart pounding.

[ 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) {};

	glm::vec2 make_point(float theta);

	ofEasyCam cam;
	ofMesh face, frame;
};

#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) {};

glm::vec2 make_point(float theta);

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"	

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

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

	ofBackground(239);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

	this->face.clear();
	this->frame.clear();

	auto rotate_y = ofGetFrameNum();
	for (int x = -600; x <= 600; x += 600) {

		for (int y = -600; y <= 600; y += 600) {

			auto noise_seed = ofRandom(1000);
			auto rotation_y = glm::rotate(glm::mat4(), rotate_y * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
			for (float scale = 3; scale < 15; scale += 2) {

				auto start_index = this->face.getNumVertices();
				auto scale_param = ofMap(ofNoise(noise_seed, scale * 0.05 + ofGetFrameNum() * 0.05), 0, 1, -1.5, 1.5);
				for (int deg = 0; deg < 360; deg += 5) {

					auto tmp_scale = scale + scale_param;

					vector<glm::vec3> vertices;
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * tmp_scale, -15, 0) * rotation_y);
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * (tmp_scale + 0.5), -15, 0) * rotation_y);
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * (tmp_scale + 0.5), -15, 0) * rotation_y);
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * tmp_scale, -15, 0) * rotation_y);

					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * tmp_scale, 15, 0) * rotation_y);
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * (tmp_scale + 0.5), 15, 0) * rotation_y);
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * (tmp_scale + 0.5), 15, 0) * rotation_y);
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * tmp_scale, 15, 0) * rotation_y);

					auto index = this->face.getNumVertices();
					this->face.addVertices(vertices);
					this->frame.addVertices(vertices);

					this->face.addIndex(index + 0); this->face.addIndex(index + 1); this->face.addIndex(index + 2);
					this->face.addIndex(index + 0); this->face.addIndex(index + 2); this->face.addIndex(index + 3);
					this->face.addIndex(index + 4); this->face.addIndex(index + 5); this->face.addIndex(index + 6);
					this->face.addIndex(index + 4); this->face.addIndex(index + 6); this->face.addIndex(index + 7);
					this->face.addIndex(index + 0); this->face.addIndex(index + 4); this->face.addIndex(index + 1);
					this->face.addIndex(index + 4); this->face.addIndex(index + 5); this->face.addIndex(index + 1);
					this->face.addIndex(index + 1); this->face.addIndex(index + 5); this->face.addIndex(index + 6);
					this->face.addIndex(index + 6); this->face.addIndex(index + 2); this->face.addIndex(index + 1);
					this->face.addIndex(index + 2); this->face.addIndex(index + 6); this->face.addIndex(index + 7);
					this->face.addIndex(index + 7); this->face.addIndex(index + 3); this->face.addIndex(index + 2);
					this->face.addIndex(index + 3); this->face.addIndex(index + 7); this->face.addIndex(index + 4);
					this->face.addIndex(index + 4); this->face.addIndex(index + 0); this->face.addIndex(index + 3);

					this->frame.addIndex(index + 0); this->frame.addIndex(index + 3);
					this->frame.addIndex(index + 1); this->frame.addIndex(index + 2);
					this->frame.addIndex(index + 4); this->frame.addIndex(index + 7);
					this->frame.addIndex(index + 5); this->frame.addIndex(index + 6);
				}
			}

			rotate_y += 40;
		}
	}
}

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

	this->cam.begin();
	ofRotateX(180);

	ofSetColor(39);
	this->face.draw();

	ofSetColor(239);
	this->frame.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
// Reference by https://twitter.com/shiffman/status/1095764239665512453
glm::vec2 ofApp::make_point(float theta) {

	float x = 16 * (pow(sin(theta), 3));
	float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta);
	return glm::vec2(x, -y);
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

auto rotate_y = ofGetFrameNum();

for (int x = -600; x <= 600; x += 600) {

for (int y = -600; y <= 600; y += 600) {

auto noise_seed = ofRandom(1000);

auto rotation_y = glm::rotate(glm::mat4(), rotate_y * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

for (float scale = 3; scale < 15; scale += 2) {

auto start_index = this->face.getNumVertices();

auto scale_param = ofMap(ofNoise(noise_seed, scale * 0.05 + ofGetFrameNum() * 0.05), 0, 1, -1.5, 1.5);

for (int deg = 0; deg < 360; deg += 5) {

auto tmp_scale = scale + scale_param;

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * tmp_scale, -15, 0) * rotation_y);

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * (tmp_scale + 0.5), -15, 0) * rotation_y);

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * (tmp_scale + 0.5), -15, 0) * rotation_y);

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * tmp_scale, -15, 0) * rotation_y);

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * tmp_scale, 15, 0) * rotation_y);

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point(deg * DEG_TO_RAD) * (tmp_scale + 0.5), 15, 0) * rotation_y);

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * (tmp_scale + 0.5), 15, 0) * rotation_y);

vertices.push_back(glm::vec3(x, y, 0) + glm::vec4(this->make_point((deg + 5) * DEG_TO_RAD) * tmp_scale, 15, 0) * rotation_y);

auto index = this->face.getNumVertices();

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

this->face.addIndex(index + 0); this->face.addIndex(index + 1); this->face.addIndex(index + 2);

this->face.addIndex(index + 0); this->face.addIndex(index + 2); this->face.addIndex(index + 3);

this->face.addIndex(index + 4); this->face.addIndex(index + 5); this->face.addIndex(index + 6);

this->face.addIndex(index + 4); this->face.addIndex(index + 6); this->face.addIndex(index + 7);

this->face.addIndex(index + 0); this->face.addIndex(index + 4); this->face.addIndex(index + 1);

this->face.addIndex(index + 4); this->face.addIndex(index + 5); this->face.addIndex(index + 1);

this->face.addIndex(index + 1); this->face.addIndex(index + 5); this->face.addIndex(index + 6);

this->face.addIndex(index + 6); this->face.addIndex(index + 2); this->face.addIndex(index + 1);

this->face.addIndex(index + 2); this->face.addIndex(index + 6); this->face.addIndex(index + 7);

this->face.addIndex(index + 7); this->face.addIndex(index + 3); this->face.addIndex(index + 2);

this->face.addIndex(index + 3); this->face.addIndex(index + 7); this->face.addIndex(index + 4);

this->face.addIndex(index + 4); this->face.addIndex(index + 0); this->face.addIndex(index + 3);

this->frame.addIndex(index + 0); this->frame.addIndex(index + 3);

this->frame.addIndex(index + 1); this->frame.addIndex(index + 2);

this->frame.addIndex(index + 4); this->frame.addIndex(index + 7);

this->frame.addIndex(index + 5); this->frame.addIndex(index + 6);

}

rotate_y += 40;

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

// Reference by https://twitter.com/shiffman/status/1095764239665512453

glm::vec2 ofApp::make_point(float theta) {

float x = 16 * (pow(sin(theta), 3));

float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta);

return glm::vec2(x, -y);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20201206

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2020年12月5日

Immature Torus. Draw by openFrameworks

[ Video ]

[ About ]
未熟なトーラス。

Immature Torus.

[ 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) {};

	glm::vec3 make_point(float R, float r, float u, float v);

	ofEasyCam cam;
	ofMesh face, frame;
};

#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) {};

glm::vec3 make_point(float R, float r, float u, float v);

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"	

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

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

	ofBackground(239);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

	this->face.clear();
	this->frame.clear();

	float R = 300;
	int v_span = 8;
	int u_span = 10;

	for (float r = 30; r <= 120; r += 5) {

		for (int v = 0; v < 360; v += v_span) {

			for (auto u = 0; u < 360; u += u_span) {

				auto noise_value = ofNoise(glm::vec4(this->make_point(R, 90, u + u_span * 0.5, v) * 0.005, r * 0.03 - ofGetFrameNum() * 0.03));

				if (noise_value > 0.65) {

					vector<glm::vec3> vertices;
					vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));
					vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));
					vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));
					vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

					int index = face.getNumVertices();
					this->face.addVertices(vertices);

					this->face.addIndex(index + 0); face.addIndex(index + 1); face.addIndex(index + 2);
					this->face.addIndex(index + 0); face.addIndex(index + 2); face.addIndex(index + 3);

					this->frame.addVertices(vertices);

					this->frame.addIndex(index + 0); this->frame.addIndex(index + 1);
					this->frame.addIndex(index + 1); this->frame.addIndex(index + 2);
					this->frame.addIndex(index + 2); this->frame.addIndex(index + 3);
					this->frame.addIndex(index + 3); this->frame.addIndex(index + 0);
				}
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateX(ofGetFrameNum() * 0.37);
	ofRotateY(ofGetFrameNum() * 0.72);


	ofSetColor(39);
	this->face.draw();

	ofSetColor(239);
	this->frame.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

	// 数学デッサン教室 描いて楽しむ数学たち　P.31

	u *= DEG_TO_RAD;
	v *= DEG_TO_RAD;

	auto x = (R + r * cos(u)) * cos(v);
	auto y = (R + r * cos(u)) * sin(v);
	auto z = r * sin(u);

	return glm::vec3(x, y, z);
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

float R = 300;

int v_span = 8;

int u_span = 10;

for (float r = 30; r <= 120; r += 5) {

for (int v = 0; v < 360; v += v_span) {

for (auto u = 0; u < 360; u += u_span) {

auto noise_value = ofNoise(glm::vec4(this->make_point(R, 90, u + u_span * 0.5, v) * 0.005, r * 0.03 - ofGetFrameNum() * 0.03));

if (noise_value > 0.65) {

vector<glm::vec3> vertices;

vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));

vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

int index = face.getNumVertices();

this->face.addVertices(vertices);

this->face.addIndex(index + 0); face.addIndex(index + 1); face.addIndex(index + 2);

this->face.addIndex(index + 0); face.addIndex(index + 2); face.addIndex(index + 3);

this->frame.addVertices(vertices);

this->frame.addIndex(index + 0); this->frame.addIndex(index + 1);

this->frame.addIndex(index + 1); this->frame.addIndex(index + 2);

this->frame.addIndex(index + 2); this->frame.addIndex(index + 3);

this->frame.addIndex(index + 3); this->frame.addIndex(index + 0);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(ofGetFrameNum() * 0.37);

ofRotateY(ofGetFrameNum() * 0.72);

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

// 数学デッサン教室描いて楽しむ数学たち　P.31

u *= DEG_TO_RAD;

v *= DEG_TO_RAD;

auto x = (R + r * cos(u)) * cos(v);

auto y = (R + r * cos(u)) * sin(v);

auto z = r * sin(u);

return glm::vec3(x, y, z);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20201205

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Amazon

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2020年12月4日2020年12月4日

Triangles. Draw by openFrameworks

[ Video ]

[ About ]
Triangles.

[ 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 setTriangleToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float start_deg, float height);

	ofEasyCam cam;
	ofMesh face, frame;
};

#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 setTriangleToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float start_deg, float height);

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofNoFill();
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

	this->face.clear();
	this->frame.clear();

	for (int x = -300; x <= 300; x += 150) {

		for (int y = -300; y <= 300; y += 150) {

			for (int z = -300; z <= 300; z += 150) {

				this->setTriangleToMesh(this->face, this->frame, glm::vec3(x, y, z), ofRandom(30, 50), 0, ofRandom(10, 25));
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateX(ofGetFrameNum() * 0.37);
	ofRotateY(ofGetFrameNum() * 0.72);

	ofSetColor(39);
	this->face.drawFaces();

	ofSetColor(239);
	this->frame.drawWireframe();

	ofSetColor(39);
	ofDrawBox(glm::vec3(), 750);

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::setTriangleToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float start_deg, float height){

	int index = face_target.getNumVertices();

	vector<glm::vec3> vertices;
	for (float deg = start_deg; deg < start_deg + 360; deg += 120) {

		vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), height * -0.5));
		vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), height * 0.5));
	}

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

	for (auto& vertex : vertices) {

		auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.z + ofGetFrameNum() * 0.008), 0, 1, PI * -2.5, PI * 2.5), glm::vec3(0, 0, 1));
		auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.y + ofGetFrameNum() * 0.008), 0, 1, PI * -2.5, PI * 2.5), glm::vec3(0, 1, 0));
		auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.x + ofGetFrameNum() * 0.008), 0, 1, PI * -2.5, PI * 2.5), glm::vec3(1, 0, 0));

		vertex = location + glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_x;
	}

	face_target.addVertices(vertices);
	frame_target.addVertices(vertices);

	face_target.addIndex(index + 0); face_target.addIndex(index + 2); face_target.addIndex(index + 4);
	face_target.addIndex(index + 1); face_target.addIndex(index + 3); face_target.addIndex(index + 5);

	face_target.addIndex(index + 0); face_target.addIndex(index + 1); face_target.addIndex(index + 3);
	face_target.addIndex(index + 0); face_target.addIndex(index + 3); face_target.addIndex(index + 2);

	face_target.addIndex(index + 2); face_target.addIndex(index + 3); face_target.addIndex(index + 5);
	face_target.addIndex(index + 2); face_target.addIndex(index + 5); face_target.addIndex(index + 4);

	face_target.addIndex(index + 4); face_target.addIndex(index + 5); face_target.addIndex(index + 1);
	face_target.addIndex(index + 4); face_target.addIndex(index + 1); face_target.addIndex(index + 2);


	frame_target.addIndex(index + 0); frame_target.addIndex(index + 2);
	frame_target.addIndex(index + 2); frame_target.addIndex(index + 4);
	frame_target.addIndex(index + 4); frame_target.addIndex(index + 0);

	frame_target.addIndex(index + 1); frame_target.addIndex(index + 3);
	frame_target.addIndex(index + 3); frame_target.addIndex(index + 5);
	frame_target.addIndex(index + 5); frame_target.addIndex(index + 1);

	frame_target.addIndex(index + 0); frame_target.addIndex(index + 1);
	frame_target.addIndex(index + 2); frame_target.addIndex(index + 3);
	frame_target.addIndex(index + 4); frame_target.addIndex(index + 5);
	
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofNoFill();

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

for (int x = -300; x <= 300; x += 150) {

for (int y = -300; y <= 300; y += 150) {

for (int z = -300; z <= 300; z += 150) {

this->setTriangleToMesh(this->face, this->frame, glm::vec3(x, y, z), ofRandom(30, 50), 0, ofRandom(10, 25));

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(ofGetFrameNum() * 0.37);

ofRotateY(ofGetFrameNum() * 0.72);

ofSetColor(39);

this->face.drawFaces();

ofSetColor(239);

this->frame.drawWireframe();

ofSetColor(39);

ofDrawBox(glm::vec3(), 750);

this->cam.end();

}

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

void ofApp::setTriangleToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float start_deg, float height){

int index = face_target.getNumVertices();

vector<glm::vec3> vertices;

for (float deg = start_deg; deg < start_deg + 360; deg += 120) {

vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), height * -0.5));

vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), height * 0.5));

}

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

for (auto& vertex : vertices) {

auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.z + ofGetFrameNum() * 0.008), 0, 1, PI * -2.5, PI * 2.5), glm::vec3(0, 0, 1));

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.y + ofGetFrameNum() * 0.008), 0, 1, PI * -2.5, PI * 2.5), glm::vec3(0, 1, 0));

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.x + ofGetFrameNum() * 0.008), 0, 1, PI * -2.5, PI * 2.5), glm::vec3(1, 0, 0));

vertex = location + glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_x;

}

face_target.addVertices(vertices);

frame_target.addVertices(vertices);

face_target.addIndex(index + 0); face_target.addIndex(index + 2); face_target.addIndex(index + 4);

face_target.addIndex(index + 1); face_target.addIndex(index + 3); face_target.addIndex(index + 5);

face_target.addIndex(index + 0); face_target.addIndex(index + 1); face_target.addIndex(index + 3);

face_target.addIndex(index + 0); face_target.addIndex(index + 3); face_target.addIndex(index + 2);

face_target.addIndex(index + 2); face_target.addIndex(index + 3); face_target.addIndex(index + 5);

face_target.addIndex(index + 2); face_target.addIndex(index + 5); face_target.addIndex(index + 4);

face_target.addIndex(index + 4); face_target.addIndex(index + 5); face_target.addIndex(index + 1);

face_target.addIndex(index + 4); face_target.addIndex(index + 1); face_target.addIndex(index + 2);

frame_target.addIndex(index + 0); frame_target.addIndex(index + 2);

frame_target.addIndex(index + 2); frame_target.addIndex(index + 4);

frame_target.addIndex(index + 4); frame_target.addIndex(index + 0);

frame_target.addIndex(index + 1); frame_target.addIndex(index + 3);

frame_target.addIndex(index + 3); frame_target.addIndex(index + 5);

frame_target.addIndex(index + 5); frame_target.addIndex(index + 1);

frame_target.addIndex(index + 0); frame_target.addIndex(index + 1);

frame_target.addIndex(index + 2); frame_target.addIndex(index + 3);

frame_target.addIndex(index + 4); frame_target.addIndex(index + 5);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20201204

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