openFrameworks – ページ 374 – プログラミング de 落描き

2021年10月26日2021年10月26日

Point group on the sphere. Draw by openFrameworks

[ Video ]

[ About ]
球体の座標を回転させる。

Rotate the coordinates of the sphere.

[ 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 base_mesh, draw_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) {};

ofEasyCam cam;

ofMesh base_mesh, draw_mesh;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);
	ofEnableDepthTest();
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

	auto ico_sphere = ofIcoSpherePrimitive(250, 4);
	this->base_mesh = ico_sphere.getMesh();

}

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

	this->draw_mesh.clear();

	int x = 0;
	for (int y = -300; y <= 300; y += 600) {

		for (auto v : this->base_mesh.getVertices()) {

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

				auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4((v + glm::vec3(x, y, 0)) * 0.0025, ofGetFrameNum() * 0.01)), 0, 1, -90, 90) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));
				auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4((v + glm::vec3(x, y, 0)) * 0.0025, ofGetFrameNum() * 0.01)), 0, 1, -90, 90) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
				auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4((v + glm::vec3(x, y, 0)) * 0.0025, ofGetFrameNum() * 0.01)), 0, 1, -90, 90) * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

				v = glm::vec4(v, 0) * rotation_z * rotation_y * rotation_x;
			}

			this->draw_mesh.addVertex(v + glm::vec3(x, y, 0));
		}

	}
}

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

	this->cam.begin();
	ofRotateZ(45);
	ofRotateY(ofGetFrameNum() * 2);

	for (auto& vertex : this->draw_mesh.getVertices()) {

		ofDrawSphere(vertex, 2);
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofEnableDepthTest();

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

auto ico_sphere = ofIcoSpherePrimitive(250, 4);

this->base_mesh = ico_sphere.getMesh();

}

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

void ofApp::update() {

this->draw_mesh.clear();

int x = 0;

for (int y = -300; y <= 300; y += 600) {

for (auto v : this->base_mesh.getVertices()) {

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

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4((v + glm::vec3(x, y, 0)) * 0.0025, ofGetFrameNum() * 0.01)), 0, 1, -90, 90) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4((v + glm::vec3(x, y, 0)) * 0.0025, ofGetFrameNum() * 0.01)), 0, 1, -90, 90) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4((v + glm::vec3(x, y, 0)) * 0.0025, ofGetFrameNum() * 0.01)), 0, 1, -90, 90) * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

v = glm::vec4(v, 0) * rotation_z * rotation_y * rotation_x;

}

this->draw_mesh.addVertex(v + glm::vec3(x, y, 0));

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateZ(45);

ofRotateY(ofGetFrameNum() * 2);

for (auto& vertex : this->draw_mesh.getVertices()) {

ofDrawSphere(vertex, 2);

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211026

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2021年10月25日2021年10月25日

Character type pattern. Draw by openFrameworks

[ Video ]

[ About ]
文字の上で 10 PRINT をする。

Do a 10 PRINT on the character.

[ 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);

	int span;
	vector<glm::vec2> location_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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

glm::vec2 make_point(int len, int param);

int span;

vector<glm::vec2> location_list;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetColor(255);
	ofSetLineWidth(2);
	ofSetCircleResolution(36);

	ofFbo fbo;
	ofPixels pixels;
	fbo.allocate(ofGetWidth(), ofGetHeight());
	fbo.begin();
	ofClear(0);

	ofTrueTypeFont font;
	font.loadFont("fonts/Kazesawa-Extrabold.ttf", 200, true, true, true);
	string word = "NFTs";
	font.drawString(word, ofGetWidth() * 0.5 - font.stringWidth(word) * 0.5, ofGetHeight() * 0.5 + font.stringHeight(word) * 0.5);

	fbo.end();
	fbo.readToPixels(pixels);

	this->span = 10;
	for (auto x = 0; x < ofGetWidth(); x += this->span) {

		for (int y = 0; y < ofGetHeight(); y += this->span) {

			if (pixels.getColor(x, y) != ofColor(0, 0)) {

				this->location_list.push_back(glm::vec2(x, y));
			}
		}
	}
}

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

	ofSeedRandom(39);
}

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

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

		ofPushMatrix();
		ofTranslate(this->location_list[i]);

		auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035);
		auto start_param = noise_value < 0.5 ? (noise_value < 0.45 ? 0 : ofMap(noise_value, 0.45, 0.5, 0, 25)) : 25;

		auto start = this->make_point(this->span, start_param);
		auto end = this->make_point(this->span, start_param + 50);

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

		ofPopMatrix();
	}
}

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

	param = param % 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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetColor(255);

ofSetLineWidth(2);

ofSetCircleResolution(36);

ofFbo fbo;

ofPixels pixels;

fbo.allocate(ofGetWidth(), ofGetHeight());

fbo.begin();

ofClear(0);

ofTrueTypeFont font;

font.loadFont("fonts/Kazesawa-Extrabold.ttf", 200, true, true, true);

string word = "NFTs";

font.drawString(word, ofGetWidth() * 0.5 - font.stringWidth(word) * 0.5, ofGetHeight() * 0.5 + font.stringHeight(word) * 0.5);

fbo.end();

fbo.readToPixels(pixels);

this->span = 10;

for (auto x = 0; x < ofGetWidth(); x += this->span) {

for (int y = 0; y < ofGetHeight(); y += this->span) {

if (pixels.getColor(x, y) != ofColor(0, 0)) {

this->location_list.push_back(glm::vec2(x, y));

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

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

ofPushMatrix();

ofTranslate(this->location_list[i]);

auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035);

auto start_param = noise_value < 0.5 ? (noise_value < 0.45 ? 0 : ofMap(noise_value, 0.45, 0.5, 0, 25)) : 25;

auto start = this->make_point(this->span, start_param);

auto end = this->make_point(this->span, start_param + 50);

ofDrawLine(start, end);

ofDrawCircle(start, 3);

ofDrawCircle(end, 3);

ofPopMatrix();

}

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

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

param = param % 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/Insta20211025

[ほしいものリスト]
Amazon

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2021年10月24日2021年10月24日

Rotating. Draw by openFrameworks

[ Video ]

[ About ]
座標から生成したノイズ値で回転させる。

Rotate with the noise value generated from the coordinates.

[ 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, float radius, float width, float height, int deg_start, int deg_end, glm::vec2 noise_seed);

	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) {};

void setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end, glm::vec2 noise_seed);

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(2);
	ofEnableDepthTest();

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

	ofSeedRandom(39);

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

	for (int x = -840; x <= 840; x += 560) {

		for (int y = -840; y <= 840; y += 560) {

			auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
			this->setRingToMesh(this->face, this->frame, glm::vec3(x, y, 0), 0, 40, 15, 0, 360, noise_seed);
			for (auto radius = 50; radius < 250; radius += 10) {

				for (int deg = 0; deg < 360; deg += 30) {

					this->setRingToMesh(this->face, this->frame, glm::vec3(x, y, 0), radius, 10, 15, deg, deg + 15, noise_seed);
				}
			}
		}
	}
}

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

	this->cam.begin();

	ofSetColor(239);
	this->face.draw();

	ofSetColor(39);
	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, glm::vec2 noise_seed) {

	auto index = frame_target.getNumVertices();

	auto noise_value = radius != 0 ? 
		glm::vec2(ofNoise(noise_seed.x - radius * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - radius * 0.003 + ofGetFrameNum() * 0.0085)) :
		glm::vec2(ofNoise(noise_seed.x - 40 * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - 40 * 0.003 + ofGetFrameNum() * 0.0085));

	auto next_noise_value = radius != 0 ?
		glm::vec2(ofNoise(noise_seed.x - (radius + width) * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - (radius + width) * 0.003 + ofGetFrameNum() * 0.0085)) :
		glm::vec2(ofNoise(noise_seed.x - 40 * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - 40 * 0.003 + ofGetFrameNum() * 0.0085));
	
	auto angle_x = ofMap(noise_value.x, 0, 1, -PI * 2, PI * 2);
	auto angle_y = ofMap(noise_value.y, 0, 1, -PI * 2, PI * 2);

	auto next_angle_x = ofMap(next_noise_value.x, 0, 1, -PI * 2, PI * 2);
	auto next_angle_y = ofMap(next_noise_value.y, 0, 1, -PI * 2, PI * 2);

	auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));
	auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));

	auto next_rotation_x = glm::rotate(glm::mat4(), next_angle_x, glm::vec3(1, 0, 0));
	auto next_rotation_y = glm::rotate(glm::mat4(), next_angle_y, glm::vec3(0, 1, 0));

	int deg_span = 3;
	for (int deg = deg_start; deg < deg_end; deg += deg_span) {

		auto face_index = face_target.getNumVertices();

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

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

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

			vertices[i] = location + glm::vec4(vertices[i], 0) * rotation_y * rotation_x;
		}

		for (int i = 4; i < 8; i++) {

			vertices[i] = location + glm::vec4(vertices[i], 0) * next_rotation_y * next_rotation_x;
		}

		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);
	}

	if (radius != 0) {

		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(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

for (int x = -840; x <= 840; x += 560) {

for (int y = -840; y <= 840; y += 560) {

auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

this->setRingToMesh(this->face, this->frame, glm::vec3(x, y, 0), 0, 40, 15, 0, 360, noise_seed);

for (auto radius = 50; radius < 250; radius += 10) {

for (int deg = 0; deg < 360; deg += 30) {

this->setRingToMesh(this->face, this->frame, glm::vec3(x, y, 0), radius, 10, 15, deg, deg + 15, noise_seed);

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(239);

this->face.draw();

ofSetColor(39);

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, glm::vec2 noise_seed) {

auto index = frame_target.getNumVertices();

auto noise_value = radius != 0 ?

glm::vec2(ofNoise(noise_seed.x - radius * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - radius * 0.003 + ofGetFrameNum() * 0.0085)) :

glm::vec2(ofNoise(noise_seed.x - 40 * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - 40 * 0.003 + ofGetFrameNum() * 0.0085));

auto next_noise_value = radius != 0 ?

glm::vec2(ofNoise(noise_seed.x - (radius + width) * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - (radius + width) * 0.003 + ofGetFrameNum() * 0.0085)) :

glm::vec2(ofNoise(noise_seed.x - 40 * 0.003 + ofGetFrameNum() * 0.0085), ofNoise(noise_seed.y - 40 * 0.003 + ofGetFrameNum() * 0.0085));

auto angle_x = ofMap(noise_value.x, 0, 1, -PI * 2, PI * 2);

auto angle_y = ofMap(noise_value.y, 0, 1, -PI * 2, PI * 2);

auto next_angle_x = ofMap(next_noise_value.x, 0, 1, -PI * 2, PI * 2);

auto next_angle_y = ofMap(next_noise_value.y, 0, 1, -PI * 2, PI * 2);

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

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

auto next_rotation_x = glm::rotate(glm::mat4(), next_angle_x, glm::vec3(1, 0, 0));

auto next_rotation_y = glm::rotate(glm::mat4(), next_angle_y, glm::vec3(0, 1, 0));

int deg_span = 3;

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

auto face_index = face_target.getNumVertices();

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

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

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

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

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

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

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

vertices[i] = location + glm::vec4(vertices[i], 0) * rotation_y * rotation_x;

}

for (int i = 4; i < 8; i++) {

vertices[i] = location + glm::vec4(vertices[i], 0) * next_rotation_y * next_rotation_x;

}

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);

}

if (radius != 0) {

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/Insta20211024

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