noise – ページ 66 – プログラミング de 落描き

2022年11月9日

turbulence. draw by openFrameworks

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乱気流。

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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;

	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(0);
	ofSetLineWidth(0.5);
	ofEnableDepthTest();

	auto ico_sphere = ofIcoSpherePrimitive(250, 4);
	this->base_mesh = ico_sphere.getMesh();
	this->draw_mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}

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

	ofSeedRandom(39);
	this->draw_mesh.clear();

	auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));
	for (int k = 0; k < 1; k++) {

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

			for (int i = 0; i < 16; i++) {

				auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.0025, noise_seed.x + ofGetFrameNum() * 0.015)), 0, 1, -15, 15) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));
				auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.0025, noise_seed.y + ofGetFrameNum() * 0.015)), 0, 1, -15, 15) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
				auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.0025, noise_seed.z + ofGetFrameNum() * 0.015)), 0, 1, -15, 15) * (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);
				this->draw_mesh.addColor(ofColor(255));

				if (i > 0) {

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

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 1.6666666666666666);

	this->draw_mesh.draw();
	
	ofSetColor(0);
	ofDrawSphere(245);

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetLineWidth(0.5);

ofEnableDepthTest();

auto ico_sphere = ofIcoSpherePrimitive(250, 4);

this->base_mesh = ico_sphere.getMesh();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->draw_mesh.clear();

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

for (int k = 0; k < 1; k++) {

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

for (int i = 0; i < 16; i++) {

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.0025, noise_seed.x + ofGetFrameNum() * 0.015)), 0, 1, -15, 15) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.0025, noise_seed.y + ofGetFrameNum() * 0.015)), 0, 1, -15, 15) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.0025, noise_seed.z + ofGetFrameNum() * 0.015)), 0, 1, -15, 15) * (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);

this->draw_mesh.addColor(ofColor(255));

if (i > 0) {

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

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

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 1.6666666666666666);

this->draw_mesh.draw();

ofSetColor(0);

ofDrawSphere(245);

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20221109

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2022年11月8日

slice sphere. Draw by openFrameworks

[ Video ]

[ About ]
球体をスライス。

[ 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(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(0);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

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

	int radius = 180;
	float phi_deg_step = 5;
	float theta_deg_step = 5;

	for (float theta_deg = theta_deg_step; theta_deg < 180; theta_deg += theta_deg_step) {

		float noise_param = radius * cos((theta_deg)* DEG_TO_RAD);
		float noise_value = ofNoise(noise_param * 0.085, ofGetFrameNum() * 0.0065);
		float noise_x = 0;

		if (noise_value > 0.75) {

			noise_x = ofMap(noise_value, 0.75, 1, 0, 600);
		}
		else if (noise_value < 0.25) {

			noise_x = ofMap(noise_value, 0, 0.25, -600, 0);
		}

		for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

			float upper_z = radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD);
			float bottom_z = radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD);

			auto index = this->face.getNumVertices();
			vector<glm::vec3> vertices;

			vertices.push_back(glm::vec3(
				noise_x + radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));
			vertices.push_back(glm::vec3(
				noise_x + radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));
			vertices.push_back(glm::vec3(
				noise_x + radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));
			vertices.push_back(glm::vec3(
				noise_x + radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
				radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));
			vertices.push_back(glm::vec3(noise_x, 0, upper_z));
			vertices.push_back(glm::vec3(noise_x, 0, bottom_z));

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

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

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

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

	this->cam.begin();

	ofSetColor(0);
	this->face.draw();

	ofSetColor(255);
	this->frame.draw();

	this->cam.end();
}

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

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

100

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103

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetLineWidth(1.5);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

int radius = 180;

float phi_deg_step = 5;

float theta_deg_step = 5;

for (float theta_deg = theta_deg_step; theta_deg < 180; theta_deg += theta_deg_step) {

float noise_param = radius * cos((theta_deg)* DEG_TO_RAD);

float noise_value = ofNoise(noise_param * 0.085, ofGetFrameNum() * 0.0065);

float noise_x = 0;

if (noise_value > 0.75) {

noise_x = ofMap(noise_value, 0.75, 1, 0, 600);

}

else if (noise_value < 0.25) {

noise_x = ofMap(noise_value, 0, 0.25, -600, 0);

}

for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

float upper_z = radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD);

float bottom_z = radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD);

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(

noise_x + radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

noise_x + radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

noise_x + radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

noise_x + radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(noise_x, 0, upper_z));

vertices.push_back(glm::vec3(noise_x, 0, bottom_z));

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

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

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

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

this->face.addIndex(index + 2); this->face.addIndex(index + 3); this->face.addIndex(index + 5);

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

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

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(0);

this->face.draw();

ofSetColor(255);

this->frame.draw();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20221108

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[ Sponsor Link ]

2022年11月6日

Fragment of circle. Draw by openFrameworks

[ Video ]

[ About ]
円の断片。

[ 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) {};

	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) {};

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	//ofSetLineWidth(2);

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

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

	ofSeedRandom(39);

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

	float deg_span = 1;
	float len = 10;
	float threshold = 0.55;

	for (float radius = 70; radius < 720; radius += 20) {

		if (radius == 90) { continue; }

		for (float deg = 0; deg < 360; deg += deg_span) {

			auto noise_radius = 30;
			auto noise_location = glm::vec2(noise_radius * cos(deg * DEG_TO_RAD), noise_radius * sin(deg * DEG_TO_RAD));
			auto prev_noise_location = glm::vec2(noise_radius * cos((deg - deg_span) * DEG_TO_RAD), noise_radius * sin((deg - deg_span) * DEG_TO_RAD));
			auto next_noise_location = glm::vec2(noise_radius * cos((deg + deg_span) * DEG_TO_RAD), noise_radius * sin((deg + deg_span) * DEG_TO_RAD));

			auto noise_value = ofNoise(glm::vec3(noise_location * 0.5, radius * 0.005 + ofGetFrameNum() * 0.035));
			auto prev_noise_value = ofNoise(glm::vec3(prev_noise_location * 0.5, radius * 0.005 + ofGetFrameNum() * 0.035));
			auto next_noise_value = ofNoise(glm::vec3(next_noise_location * 0.5, radius * 0.005 + ofGetFrameNum() * 0.035));

			if (noise_value > threshold) {

				vector<glm::vec3> vertices;
				vertices.push_back(glm::vec3((radius + len * 0.5) * cos((deg + deg_span * 0.5) * DEG_TO_RAD), (radius + len * 0.5) * sin((deg + deg_span * 0.5) * DEG_TO_RAD), 0));
				vertices.push_back(glm::vec3((radius - len * 0.5) * cos((deg + deg_span * 0.5) * DEG_TO_RAD), (radius - len * 0.5) * sin((deg + deg_span * 0.5) * DEG_TO_RAD), 0));
				vertices.push_back(glm::vec3((radius - len * 0.5) * cos((deg - deg_span * 0.5) * DEG_TO_RAD), (radius - len * 0.5) * sin((deg - deg_span * 0.5) * DEG_TO_RAD), 0));
				vertices.push_back(glm::vec3((radius + len * 0.5) * cos((deg - deg_span * 0.5) * DEG_TO_RAD), (radius + len * 0.5) * sin((deg - deg_span * 0.5) * DEG_TO_RAD), 0));

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

				this->face.addTriangle(this->face.getNumVertices() - 1, this->face.getNumVertices() - 2, this->face.getNumVertices() - 3);
				this->face.addTriangle(this->face.getNumVertices() - 1, this->face.getNumVertices() - 3, this->face.getNumVertices() - 4);

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

				if (prev_noise_value <= threshold) {

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

				if (next_noise_value <= threshold) {

					this->frame.addIndex(this->frame.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 4);
				}
			}
		}
	}
}

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

	ofTranslate(ofGetWindowSize() * 0.5);
	
	ofSetColor(0);
	this->face.draw();
	
	ofSetColor(128, 128, 255);
	this->frame.draw();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

//ofSetLineWidth(2);

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

float deg_span = 1;

float len = 10;

float threshold = 0.55;

for (float radius = 70; radius < 720; radius += 20) {

if (radius == 90) { continue; }

for (float deg = 0; deg < 360; deg += deg_span) {

auto noise_radius = 30;

auto noise_location = glm::vec2(noise_radius * cos(deg * DEG_TO_RAD), noise_radius * sin(deg * DEG_TO_RAD));

auto prev_noise_location = glm::vec2(noise_radius * cos((deg - deg_span) * DEG_TO_RAD), noise_radius * sin((deg - deg_span) * DEG_TO_RAD));

auto next_noise_location = glm::vec2(noise_radius * cos((deg + deg_span) * DEG_TO_RAD), noise_radius * sin((deg + deg_span) * DEG_TO_RAD));

auto noise_value = ofNoise(glm::vec3(noise_location * 0.5, radius * 0.005 + ofGetFrameNum() * 0.035));

auto prev_noise_value = ofNoise(glm::vec3(prev_noise_location * 0.5, radius * 0.005 + ofGetFrameNum() * 0.035));

auto next_noise_value = ofNoise(glm::vec3(next_noise_location * 0.5, radius * 0.005 + ofGetFrameNum() * 0.035));

if (noise_value > threshold) {

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3((radius + len * 0.5) * cos((deg + deg_span * 0.5) * DEG_TO_RAD), (radius + len * 0.5) * sin((deg + deg_span * 0.5) * DEG_TO_RAD), 0));

vertices.push_back(glm::vec3((radius - len * 0.5) * cos((deg + deg_span * 0.5) * DEG_TO_RAD), (radius - len * 0.5) * sin((deg + deg_span * 0.5) * DEG_TO_RAD), 0));

vertices.push_back(glm::vec3((radius - len * 0.5) * cos((deg - deg_span * 0.5) * DEG_TO_RAD), (radius - len * 0.5) * sin((deg - deg_span * 0.5) * DEG_TO_RAD), 0));

vertices.push_back(glm::vec3((radius + len * 0.5) * cos((deg - deg_span * 0.5) * DEG_TO_RAD), (radius + len * 0.5) * sin((deg - deg_span * 0.5) * DEG_TO_RAD), 0));

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

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

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

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

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

if (prev_noise_value <= threshold) {

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

}

if (next_noise_value <= threshold) {

this->frame.addIndex(this->frame.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 4);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

ofSetColor(0);

this->face.draw();

ofSetColor(128, 128, 255);

this->frame.draw();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20221106

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