ofMesh – ページ 196 – プログラミング de 落描き

2020年3月8日2020年3月8日

Cube made of triangular pyramids. openFrameworks

[ Video ]

[ About ]
三角錐で出来た立方体。

Cube made of triangular pyramids.

[ 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) {};
	
	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) {};

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}
//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);

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

	int len = 100;

	for (int r = 0; r < 6; r++) {

		vector<glm::vec3> vertices;
		vertices.push_back(glm::vec3());
		vertices.push_back(glm::vec3(-len * 0.5, -len * 0.5, -len * 0.5));
		vertices.push_back(glm::vec3(len * 0.5, -len * 0.5, -len * 0.5));
		vertices.push_back(glm::vec3(len * 0.5, -len * 0.5, len * 0.5));
		vertices.push_back(glm::vec3(-len * 0.5, -len * 0.5, len * 0.5));
	
		int angle;
		glm::highp_mat4 rotation;
		float noise_value;
		if (r < 4) {
			angle = r * 90;
			rotation = glm::rotate(glm::mat4(), (float)(angle * DEG_TO_RAD), glm::vec3(1, 0, 0));
			noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.01);

		}
		else {

			angle = r == 5 ? 90 : 270;
			rotation = glm::rotate(glm::mat4(), (float)(angle * DEG_TO_RAD), glm::vec3(0, 0, 1));
			noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.01);
		}

		auto rotation_y = glm::rotate(glm::mat4(), (float)(noise_value < 0.55 ? 0 : ofMap(noise_value, 0.55, 1, 0, 12)), glm::vec3(0, 1, 0));
		for (auto& vertex : vertices) { 

			vertex = (glm::vec4(vertex, 0) + glm::vec4(0, noise_value < 0.48 ? -1 : ofMap(noise_value, 0.48, 1, -1, -150), 0, 0)) * rotation_y * rotation;
		}

		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 + 0); this->face.addIndex(index + 3); this->face.addIndex(index + 4);
		this->face.addIndex(index + 0); this->face.addIndex(index + 4); this->face.addIndex(index + 1);

		this->face.addIndex(index + 1); this->face.addIndex(index + 2); this->face.addIndex(index + 3);
		this->face.addIndex(index + 1); this->face.addIndex(index + 3); this->face.addIndex(index + 4);

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

		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 + 4);
		this->frame.addIndex(index + 4); this->frame.addIndex(index + 1);
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.85);
	ofRotateX(ofGetFrameNum() * 0.5);

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

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

	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(239);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

int len = 100;

for (int r = 0; r < 6; r++) {

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3());

vertices.push_back(glm::vec3(-len * 0.5, -len * 0.5, -len * 0.5));

vertices.push_back(glm::vec3(len * 0.5, -len * 0.5, -len * 0.5));

vertices.push_back(glm::vec3(len * 0.5, -len * 0.5, len * 0.5));

vertices.push_back(glm::vec3(-len * 0.5, -len * 0.5, len * 0.5));

int angle;

glm::highp_mat4 rotation;

float noise_value;

if (r < 4) {

angle = r * 90;

rotation = glm::rotate(glm::mat4(), (float)(angle * DEG_TO_RAD), glm::vec3(1, 0, 0));

noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.01);

}

else {

angle = r == 5 ? 90 : 270;

rotation = glm::rotate(glm::mat4(), (float)(angle * DEG_TO_RAD), glm::vec3(0, 0, 1));

noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.01);

}

auto rotation_y = glm::rotate(glm::mat4(), (float)(noise_value < 0.55 ? 0 : ofMap(noise_value, 0.55, 1, 0, 12)), glm::vec3(0, 1, 0));

for (auto& vertex : vertices) {

vertex = (glm::vec4(vertex, 0) + glm::vec4(0, noise_value < 0.48 ? -1 : ofMap(noise_value, 0.48, 1, -1, -150), 0, 0)) * rotation_y * rotation;

}

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

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

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

this->face.addIndex(index + 1); this->face.addIndex(index + 3); this->face.addIndex(index + 4);

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

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

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

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

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 + 4);

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

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.85);

ofRotateX(ofGetFrameNum() * 0.5);

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200308

2020年3月7日2020年3月7日

Stretch and shrink. openFrameworks

[ Video ]

[ About ]
伸びて縮む円。

Stretch and shrink.

[ 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 setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end);

	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 setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end);

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}
//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);

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

	for (int radius = 50; radius < 350; radius += 20) {

		int deg_start = ofRandom(360);
		int deg_width = (int)(ofRandom(0, 360) + ofGetFrameNum() * ofRandom(5, 10)) % 720;

		if (deg_width < 360) {
		
			this->setRingToMesh(this->face, this->frame, glm::vec3(), radius, 18, 20, deg_start, deg_start + deg_width);
		}
		else {

			this->setRingToMesh(this->face, this->frame, glm::vec3(), radius, 18, 20, deg_start + deg_width - 360, deg_start + 360);
		}
	}
}

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

	this->cam.begin();

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

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

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end) {

	if (deg_start == deg_end) { return; }

	int index = face_target.getNumVertices();

	for (int deg = deg_start; deg <= deg_end; deg += 1) {

		auto face_index = face_target.getNumVertices();

		vector<glm::vec3> vertices;
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), height * -0.5));
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5));
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5));
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), height * 0.5));

		vertices.push_back(glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), height * -0.5));
		vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5));
		vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5));
		vertices.push_back(glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), height * 0.5));

		for (auto& vertex : vertices) {

			vertex += location;
		}

		face_target.addVertices(vertices);

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

		face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 6);
		face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 7);

		face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5);
		face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 1);

		face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 7); face_target.addIndex(face_index + 6);
		face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 2);

		auto frame_index = frame_target.getNumVertices();

		frame_target.addVertices(vertices);

		frame_target.addIndex(frame_index + 0); frame_target.addIndex(frame_index + 1);
		frame_target.addIndex(frame_index + 2); frame_target.addIndex(frame_index + 3);
		frame_target.addIndex(frame_index + 4); frame_target.addIndex(frame_index + 5);
		frame_target.addIndex(frame_index + 6); frame_target.addIndex(frame_index + 7);
	}

	face_target.addIndex(index + 0); face_target.addIndex(index + 3); face_target.addIndex(index + 7);
	face_target.addIndex(index + 0); face_target.addIndex(index + 7); face_target.addIndex(index + 4);

	frame_target.addIndex(index + 0); frame_target.addIndex(index + 3);
	frame_target.addIndex(index + 0); frame_target.addIndex(index + 4);
	frame_target.addIndex(index + 7); frame_target.addIndex(index + 3);
	frame_target.addIndex(index + 7); frame_target.addIndex(index + 4);

	index = frame_target.getNumVertices() - 8;

	face_target.addIndex(index + 1); face_target.addIndex(index + 2); face_target.addIndex(index + 6);
	face_target.addIndex(index + 1); face_target.addIndex(index + 6); face_target.addIndex(index + 5);

	frame_target.addIndex(index + 1); frame_target.addIndex(index + 2);
	frame_target.addIndex(index + 1); frame_target.addIndex(index + 5);
	frame_target.addIndex(index + 6); frame_target.addIndex(index + 2);
	frame_target.addIndex(index + 6); 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(30);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

for (int radius = 50; radius < 350; radius += 20) {

int deg_start = ofRandom(360);

int deg_width = (int)(ofRandom(0, 360) + ofGetFrameNum() * ofRandom(5, 10)) % 720;

if (deg_width < 360) {

this->setRingToMesh(this->face, this->frame, glm::vec3(), radius, 18, 20, deg_start, deg_start + deg_width);

}

else {

this->setRingToMesh(this->face, this->frame, glm::vec3(), radius, 18, 20, deg_start + deg_width - 360, deg_start + 360);

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

void ofApp::setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end) {

if (deg_start == deg_end) { return; }

int index = face_target.getNumVertices();

for (int deg = deg_start; deg <= deg_end; deg += 1) {

auto face_index = face_target.getNumVertices();

vector<glm::vec3> vertices;

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

vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5));

vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5));

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

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

vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5));

vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5));

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

for (auto& vertex : vertices) {

vertex += location;

}

face_target.addVertices(vertices);

face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 1); face_target.addIndex(face_index + 2);

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

face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 6);

face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 7);

face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5);

face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 1);

face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 7); face_target.addIndex(face_index + 6);

face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 2);

auto frame_index = frame_target.getNumVertices();

frame_target.addVertices(vertices);

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

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

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

frame_target.addIndex(frame_index + 6); frame_target.addIndex(frame_index + 7);

}

face_target.addIndex(index + 0); face_target.addIndex(index + 3); face_target.addIndex(index + 7);

face_target.addIndex(index + 0); face_target.addIndex(index + 7); face_target.addIndex(index + 4);

frame_target.addIndex(index + 0); frame_target.addIndex(index + 3);

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

frame_target.addIndex(index + 7); frame_target.addIndex(index + 3);

frame_target.addIndex(index + 7); frame_target.addIndex(index + 4);

index = frame_target.getNumVertices() - 8;

face_target.addIndex(index + 1); face_target.addIndex(index + 2); face_target.addIndex(index + 6);

face_target.addIndex(index + 1); face_target.addIndex(index + 6); face_target.addIndex(index + 5);

frame_target.addIndex(index + 1); frame_target.addIndex(index + 2);

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

frame_target.addIndex(index + 6); frame_target.addIndex(index + 2);

frame_target.addIndex(index + 6); frame_target.addIndex(index + 5);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200307

2020年3月6日2020年3月6日

Patchwork box. openFrameworks

[ Video ]

[ About ]
つぎはぎ箱。

Patchwork box.

[ 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(int len, int param);

	ofEasyCam cam;
	ofMesh face, frame;
	int number_of_vertices;
};

#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(int len, int param);

ofEasyCam cam;

ofMesh face, frame;

int number_of_vertices;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);
	ofEnableDepthTest();

	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	this->number_of_vertices = 400;

	for (int i = 0; i < this->number_of_vertices - 3; i += 4) {

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

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

//--------------------------------------------------------------
void ofApp::update() {
	
	int len = 200;
	vector<glm::vec3> vertices;
	int param = ofRandom(100);
	if (ofRandom(1) < 0.5) {

		vertices.push_back(glm::vec3(this->make_point(len, param), len * 0.5));
		vertices.push_back(glm::vec3(this->make_point(len, param + 2), len * 0.5));
		vertices.push_back(glm::vec3(this->make_point(len, 100 - param - 2), len * 0.5));
		vertices.push_back(glm::vec3(this->make_point(len, 100 - param), len * 0.5));
	}
	else {

		vertices.push_back(glm::vec3(this->make_point(len, param), len * 0.5));
		vertices.push_back(glm::vec3(this->make_point(len, param + 2), len * 0.5));
		vertices.push_back(glm::vec3(this->make_point(len, 150 - param - 2), len * 0.5));
		vertices.push_back(glm::vec3(this->make_point(len, 150 - param), len * 0.5));
	}

	int r = (int)ofRandom(6);

	if (r < 4) {
	
		auto angle_y = r * 90;
		auto rotation_y = glm::rotate(glm::mat4(), (float)(angle_y * DEG_TO_RAD), glm::vec3(0, 1, 0));

		for (auto& vertex : vertices) {

			vertex = glm::vec4(vertex, 0) * rotation_y;
		}
	}
	else {

		auto angle_x = r == 5 ? 90 : 270;
		auto rotation_x = glm::rotate(glm::mat4(), (float)(angle_x * DEG_TO_RAD), glm::vec3(1, 0, 0));

		for (auto& vertex : vertices) {

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

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

	while (this->face.getNumVertices() > this->number_of_vertices) {

		this->face.removeVertex(0);
		this->face.removeVertex(0);
		this->face.removeVertex(0);
		this->face.removeVertex(0);	

		this->frame.removeVertex(0);
		this->frame.removeVertex(0);
		this->frame.removeVertex(0);
		this->frame.removeVertex(0);
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.85);
	ofRotateX(ofGetFrameNum() * 0.5);

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

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

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec2 ofApp::make_point(int len, int param) {

	param = (param + 100) % 100;
	if (param < 25) {

		return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);
	}
	else if (param < 50) {

		return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));
	}
	else if (param < 75) {

		return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);
	}
	else {

		return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));
	}
}

//--------------------------------------------------------------
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(239);

ofEnableDepthTest();

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

this->number_of_vertices = 400;

for (int i = 0; i < this->number_of_vertices - 3; i += 4) {

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

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

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

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

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

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

}

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

void ofApp::update() {

int len = 200;

vector<glm::vec3> vertices;

int param = ofRandom(100);

if (ofRandom(1) < 0.5) {

vertices.push_back(glm::vec3(this->make_point(len, param), len * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, param + 2), len * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, 100 - param - 2), len * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, 100 - param), len * 0.5));

}

else {

vertices.push_back(glm::vec3(this->make_point(len, param), len * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, param + 2), len * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, 150 - param - 2), len * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, 150 - param), len * 0.5));

}

int r = (int)ofRandom(6);

if (r < 4) {

auto angle_y = r * 90;

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

for (auto& vertex : vertices) {

vertex = glm::vec4(vertex, 0) * rotation_y;

}

else {

auto angle_x = r == 5 ? 90 : 270;

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

for (auto& vertex : vertices) {

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

}

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

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

while (this->face.getNumVertices() > this->number_of_vertices) {

this->face.removeVertex(0);

this->frame.removeVertex(0);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.85);

ofRotateX(ofGetFrameNum() * 0.5);

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

glm::vec2 ofApp::make_point(int len, int param) {

param = (param + 100) % 100;

if (param < 25) {

return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);

}

else if (param < 50) {

return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));

}

else if (param < 75) {

return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);

}

else {

return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200306

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