openframeworks – ページ 144 – プログラミング de 落描き

2022年6月28日

open the triangular pyramid. Draw by openFrameworks

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[ About ]
三角錐を開く。

open the triangular pyramid.

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#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;
};

#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;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetLineWidth(2);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

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

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

			ofPushMatrix();
			ofTranslate(x, y);
			
			ofRotateZ(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));
			ofRotateY(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));
			ofRotateX(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

			ofMesh mesh;
			auto param = 30;
			glm::vec3 avg;
			float noise_value;

			vector<glm::vec3> vertices;
			vertices.push_back(glm::vec4(param, param, param, 0));
			vertices.push_back(glm::vec4(param, -param, -param, 0));
			vertices.push_back(glm::vec4(-param, param, -param, 0));
			vertices.push_back(glm::vec4(-param, -param, param, 0));

			avg = (vertices[0] + vertices[1] + vertices[2]) / 3;
			noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));
			noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

			mesh.addVertex(vertices[0] + avg * noise_value);
			mesh.addVertex(vertices[1] + avg * noise_value);
			mesh.addVertex(vertices[2] + avg * noise_value);

			ofDrawLine(glm::vec3(), avg + avg * noise_value);

			avg = (vertices[0] + vertices[1] + vertices[3]) / 3;
			noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));
			noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

			mesh.addVertex(vertices[0] + avg * noise_value);
			mesh.addVertex(vertices[1] + avg * noise_value);
			mesh.addVertex(vertices[3] + avg * noise_value);

			ofDrawLine(glm::vec3(), avg + avg * noise_value);

			avg = (vertices[0] + vertices[2] + vertices[3]) / 3;
			noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));
			noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

			mesh.addVertex(vertices[0] + avg * noise_value);
			mesh.addVertex(vertices[2] + avg * noise_value);
			mesh.addVertex(vertices[3] + avg * noise_value);

			ofDrawLine(glm::vec3(), avg + avg * noise_value);

			avg = (vertices[1] + vertices[2] + vertices[3]) / 3;
			noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));
			noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

			mesh.addVertex(vertices[1] + avg * noise_value);
			mesh.addVertex(vertices[2] + avg * noise_value);
			mesh.addVertex(vertices[3] + avg * noise_value);

			ofDrawLine(glm::vec3(), avg + avg * noise_value);

			ofSetColor(255);
			mesh.drawFaces();

			ofSetColor(0);
			mesh.drawWireframe();

			for (auto& vertex : mesh.getVertices()) {

				ofDrawSphere(vertex, 5);
			}
			ofDrawSphere(glm::vec3(), 5);

			ofPopMatrix();
		}
	}

	this->cam.end();
}

//--------------------------------------------------------------
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(255);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

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

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

ofPushMatrix();

ofTranslate(x, y);

ofRotateZ(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

ofRotateY(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

ofRotateX(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

ofMesh mesh;

auto param = 30;

glm::vec3 avg;

float noise_value;

vector<glm::vec3> vertices;

vertices.push_back(glm::vec4(param, param, param, 0));

vertices.push_back(glm::vec4(param, -param, -param, 0));

vertices.push_back(glm::vec4(-param, param, -param, 0));

vertices.push_back(glm::vec4(-param, -param, param, 0));

avg = (vertices[0] + vertices[1] + vertices[2]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

mesh.addVertex(vertices[0] + avg * noise_value);

mesh.addVertex(vertices[1] + avg * noise_value);

mesh.addVertex(vertices[2] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

avg = (vertices[0] + vertices[1] + vertices[3]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

mesh.addVertex(vertices[0] + avg * noise_value);

mesh.addVertex(vertices[1] + avg * noise_value);

mesh.addVertex(vertices[3] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

avg = (vertices[0] + vertices[2] + vertices[3]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

mesh.addVertex(vertices[0] + avg * noise_value);

mesh.addVertex(vertices[2] + avg * noise_value);

mesh.addVertex(vertices[3] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

avg = (vertices[1] + vertices[2] + vertices[3]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.005 + glm::vec3(x, y, 0), ofGetFrameNum() * 0.02));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

mesh.addVertex(vertices[1] + avg * noise_value);

mesh.addVertex(vertices[2] + avg * noise_value);

mesh.addVertex(vertices[3] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

ofSetColor(255);

mesh.drawFaces();

ofSetColor(0);

mesh.drawWireframe();

for (auto& vertex : mesh.getVertices()) {

ofDrawSphere(vertex, 5);

}

ofDrawSphere(glm::vec3(), 5);

ofPopMatrix();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220628

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2022年6月27日

pinwheel. Draw by openFrameworks

[ Video ]

[ About ]
ねずみ花火。

pinwheel.

[ 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) {};

	ofMesh mesh;

	glm::vec2 base_seed;

	vector<glm::vec2> location_list;
	vector<glm::vec2> velocity_list;
	vector<ofColor> color_list;
};

#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) {};

ofMesh mesh;

glm::vec2 base_seed;

vector<glm::vec2> location_list;

vector<glm::vec2> velocity_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetCircleResolution(60);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	this->mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	this->base_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
}

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

	this->mesh.clear();

	int span = 20;
	int radius = 90;
	ofColor color;

	auto deg_start = ofMap(ofNoise(39, ofGetFrameNum() * 0.005), 0, 1, -360, 360);
	for (int deg = deg_start; deg < deg_start + 360; deg += 45) {

		for (int k = 0; k < 4; k++) {

			auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
			auto deg_param = ofMap(ofNoise(location.x * 0.005, location.y * 0.005, (ofGetFrameNum() + 1) * 0.005), 0, 1, -60, 60);
			auto next = glm::vec2((radius - 10) * cos((deg + deg_param) * DEG_TO_RAD), (radius - 10) * sin((deg + deg_param) * DEG_TO_RAD));

			auto distance = location - next;
			distance *= 1;

			auto future = location + distance * 30;
			auto random_deg = ofRandom(360);
			future += glm::vec2(120 * cos(random_deg * DEG_TO_RAD), 120 * sin(random_deg * DEG_TO_RAD));
			auto future_distance = future - location;

			this->location_list.push_back(location);
			this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance) * ofRandom(0.25, 0.6));
			color.setHsb(ofRandom(255), 200, 255);
			this->color_list.push_back(ofColor(color, 0));
		}
	}

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

		this->location_list[i] += this->velocity_list[i];
		this->velocity_list[i] *= 1.01;

		if (glm::distance(glm::vec2(), this->location_list[i]) > 720) {

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

		this->mesh.addVertex(glm::vec3(this->location_list[i], 0));
		this->mesh.addColor(this->color_list[i]);
	}

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

		for (int k = i + 1; k < this->mesh.getNumVertices(); k++) {

			auto distance = glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k));
			if (distance < span) {

				auto alpha = distance < span * 0.25 ? 255 : ofMap(distance, span * 0.25, span, 255, 0);
				alpha = 255;

				if (this->mesh.getColor(i).a < alpha) {

					this->mesh.setColor(i, ofColor(this->mesh.getColor(i), alpha));
				}

				if (this->mesh.getColor(k).a < alpha) {

					this->mesh.setColor(k, ofColor(this->mesh.getColor(k), alpha));
				}

				this->mesh.addIndex(i);
				this->mesh.addIndex(k);
			}
		}
	}

}

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

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

	this->mesh.drawWireframe();

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

		ofSetColor(this->mesh.getColor(i));
		ofDrawCircle(this->mesh.getVertex(i), 3);
	}
}

//--------------------------------------------------------------
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);

ofSetCircleResolution(60);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

this->base_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

}

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

void ofApp::update() {

this->mesh.clear();

int span = 20;

int radius = 90;

ofColor color;

auto deg_start = ofMap(ofNoise(39, ofGetFrameNum() * 0.005), 0, 1, -360, 360);

for (int deg = deg_start; deg < deg_start + 360; deg += 45) {

for (int k = 0; k < 4; k++) {

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

auto deg_param = ofMap(ofNoise(location.x * 0.005, location.y * 0.005, (ofGetFrameNum() + 1) * 0.005), 0, 1, -60, 60);

auto next = glm::vec2((radius - 10) * cos((deg + deg_param) * DEG_TO_RAD), (radius - 10) * sin((deg + deg_param) * DEG_TO_RAD));

auto distance = location - next;

distance *= 1;

auto future = location + distance * 30;

auto random_deg = ofRandom(360);

future += glm::vec2(120 * cos(random_deg * DEG_TO_RAD), 120 * sin(random_deg * DEG_TO_RAD));

auto future_distance = future - location;

this->location_list.push_back(location);

this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance) * ofRandom(0.25, 0.6));

color.setHsb(ofRandom(255), 200, 255);

this->color_list.push_back(ofColor(color, 0));

}

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

this->location_list[i] += this->velocity_list[i];

this->velocity_list[i] *= 1.01;

if (glm::distance(glm::vec2(), this->location_list[i]) > 720) {

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

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

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

}

this->mesh.addVertex(glm::vec3(this->location_list[i], 0));

this->mesh.addColor(this->color_list[i]);

}

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

for (int k = i + 1; k < this->mesh.getNumVertices(); k++) {

auto distance = glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k));

if (distance < span) {

auto alpha = distance < span * 0.25 ? 255 : ofMap(distance, span * 0.25, span, 255, 0);

alpha = 255;

if (this->mesh.getColor(i).a < alpha) {

this->mesh.setColor(i, ofColor(this->mesh.getColor(i), alpha));

}

if (this->mesh.getColor(k).a < alpha) {

this->mesh.setColor(k, ofColor(this->mesh.getColor(k), alpha));

}

this->mesh.addIndex(i);

this->mesh.addIndex(k);

}

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

void ofApp::draw() {

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

this->mesh.drawWireframe();

ofFill();

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

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

ofDrawCircle(this->mesh.getVertex(i), 3);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220627

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2022年6月26日

Coloring. Draw by openFrameworks

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[ About ]

[ 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) {};

	void setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, glm::vec3 rotation, float radius, float height, ofColor face_color, ofColor frame_color);

	ofEasyCam cam;
	ofMesh face, frame;

	vector<float> radius_list;
	vector<glm::vec3> rotation_list;
};

#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) {};

void setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, glm::vec3 rotation, float radius, float height, ofColor face_color, ofColor frame_color);

ofEasyCam cam;

ofMesh face, frame;

vector<float> radius_list;

vector<glm::vec3> rotation_list;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetLineWidth(3);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);
	glm::vec3 noise_param = glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360));

	if (ofGetFrameNum() % 2 == 0) {

		this->radius_list.push_back(0);
		//this->rotation_list.push_back(glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360)));

		this->rotation_list.push_back(glm::vec3(

			ofMap(ofNoise(noise_param.x, ofGetFrameNum() * 0.006), 0, 1, -360, 360),
			ofMap(ofNoise(noise_param.y, ofGetFrameNum() * 0.006), 0, 1, -360, 360),
			ofMap(ofNoise(noise_param.z, ofGetFrameNum() * 0.006), 0, 1, -360, 360)));
	}

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

		this->radius_list[i] += 5;

		if (this->radius_list[i] > 250) {

			this->radius_list.erase(this->radius_list.begin() + i);
			this->rotation_list.erase(this->rotation_list.begin() + i);
		}
	}

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

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

		color.setHsb((i * 30) % 255, 200, 255);

		auto alpha = this->radius_list[i] < 30 ? 0 : ofMap(this->radius_list[i], 30, 250, 0, 255);
		this->setRingToMesh(this->face, this->frame, glm::vec3(), this->rotation_list[i], this->radius_list[i], this->radius_list[i] * 0.1, ofColor(color, alpha), ofColor(255, alpha));
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 1.33333333333);

	this->face.draw();
	this->frame.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, glm::vec3 rotation, float radius, float height, ofColor face_color, ofColor frame_color) {

	int index = face_target.getNumVertices();

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

		vector<glm::vec3> vertices;
		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 + 5) * DEG_TO_RAD), radius * sin((deg + 5) * DEG_TO_RAD), height * -0.5));
		vertices.push_back(glm::vec3(radius * cos((deg + 5) * DEG_TO_RAD), radius * sin((deg + 5) * 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));

		for (auto& vertex : vertices) {

			auto rotation_x = glm::rotate(glm::mat4(), rotation.x * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));
			auto rotation_y = glm::rotate(glm::mat4(), rotation.y * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
			auto rotation_z = glm::rotate(glm::mat4(), rotation.z * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

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

		auto face_index = face_target.getNumVertices();
		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);

		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);

		for (int i = 0; i < vertices.size(); i++) {

			face_target.addColor(face_color);
			frame_target.addColor(frame_color);
		}
	}
}

//--------------------------------------------------------------
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(255);

ofSetLineWidth(3);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

glm::vec3 noise_param = glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360));

if (ofGetFrameNum() % 2 == 0) {

this->radius_list.push_back(0);

//this->rotation_list.push_back(glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360)));

this->rotation_list.push_back(glm::vec3(

ofMap(ofNoise(noise_param.x, ofGetFrameNum() * 0.006), 0, 1, -360, 360),

ofMap(ofNoise(noise_param.y, ofGetFrameNum() * 0.006), 0, 1, -360, 360),

ofMap(ofNoise(noise_param.z, ofGetFrameNum() * 0.006), 0, 1, -360, 360)));

}

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

this->radius_list[i] += 5;

if (this->radius_list[i] > 250) {

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

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

}

this->face.clear();

this->frame.clear();

ofColor color;

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

color.setHsb((i * 30) % 255, 200, 255);

auto alpha = this->radius_list[i] < 30 ? 0 : ofMap(this->radius_list[i], 30, 250, 0, 255);

this->setRingToMesh(this->face, this->frame, glm::vec3(), this->rotation_list[i], this->radius_list[i], this->radius_list[i] * 0.1, ofColor(color, alpha), ofColor(255, alpha));

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 1.33333333333);

this->face.draw();

this->frame.drawWireframe();

this->cam.end();

}

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

void ofApp::setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, glm::vec3 rotation, float radius, float height, ofColor face_color, ofColor frame_color) {

int index = face_target.getNumVertices();

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

vector<glm::vec3> vertices;

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 + 5) * DEG_TO_RAD), radius * sin((deg + 5) * DEG_TO_RAD), height * -0.5));

vertices.push_back(glm::vec3(radius * cos((deg + 5) * DEG_TO_RAD), radius * sin((deg + 5) * 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));

for (auto& vertex : vertices) {

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

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

auto rotation_z = glm::rotate(glm::mat4(), rotation.z * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

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

}

auto face_index = face_target.getNumVertices();

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);

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);

for (int i = 0; i < vertices.size(); i++) {

face_target.addColor(face_color);

frame_target.addColor(frame_color);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220626

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