2023年5月 – ページ 8 – プログラミング de 落描き

2023年5月10日

Sphere spin. Draw by openFrameworks

[ Video ]

[ About ]
球体スピン。

[ 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, sphere_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, sphere_mesh;

};

#include "ofApp.h"

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

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

	ofBackground(39);
	ofSetColor(255);
	ofSetLineWidth(2);

	auto ico_sphere = ofIcoSpherePrimitive(250, 2);
	this->base_mesh = ico_sphere.getMesh();
	this->draw_mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}

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

	this->draw_mesh.clear();
	this->sphere_mesh.clear();

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

		for (int i = 0; i < 20; i++) {

			auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.00035, ofGetFrameNum() * 0.006 + i * 0.005)), 0, 1, -180, 180) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));
			auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.00035, ofGetFrameNum() * 0.006 + i * 0.005)), 0, 1, -180, 180) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
			auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.00035, ofGetFrameNum() * 0.006 + i * 0.005)), 0, 1, -180, 180) * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));
			auto vertex = glm::vec4(v, 0) * rotation_z * rotation_y * rotation_x;
			vertex.z = 0;

			this->draw_mesh.addVertex(vertex);
			if (i != 0) {

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

			if (i == 0 || i == 19) {

				this->sphere_mesh.addVertex(vertex);
			}
		}
	}
}

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

	this->cam.begin();
	
	this->draw_mesh.drawWireframe();

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

		ofDrawSphere(v, 4);
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(39);

ofSetColor(255);

ofSetLineWidth(2);

auto ico_sphere = ofIcoSpherePrimitive(250, 2);

this->base_mesh = ico_sphere.getMesh();

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

}

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

void ofApp::update() {

this->draw_mesh.clear();

this->sphere_mesh.clear();

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

for (int i = 0; i < 20; i++) {

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.00035, ofGetFrameNum() * 0.006 + i * 0.005)), 0, 1, -180, 180) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.00035, ofGetFrameNum() * 0.006 + i * 0.005)), 0, 1, -180, 180) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(v * 0.00035, ofGetFrameNum() * 0.006 + i * 0.005)), 0, 1, -180, 180) * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

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

vertex.z = 0;

this->draw_mesh.addVertex(vertex);

if (i != 0) {

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

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

}

if (i == 0 || i == 19) {

this->sphere_mesh.addVertex(vertex);

}

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

void ofApp::draw() {

this->cam.begin();

this->draw_mesh.drawWireframe();

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

ofDrawSphere(v, 4);

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230510

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2023年5月9日

Heart Maze. Draw by openFrameworks

[ Video ]

[ About ]
ハート迷路。

[ Source ]

#pragma once
#include "ofMain.h"

class Actor {
public:
	Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);
	void update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);
	glm::vec3 getLocation();
	deque<glm::vec3> getLog();

private:

	int select_index;
	int next_index;

	glm::vec3 location;
	deque<glm::vec3> log;
};

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) {};

	vector<glm::vec3> location_list;
	vector<vector<int>> next_index_list;
	vector<int> destination_list;

	vector<unique_ptr<Actor>> actor_list;

	glm::vec3 make_point(float theta);
};

#pragma once

#include "ofMain.h"

class Actor {

public:

Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);

void update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);

glm::vec3 getLocation();

deque<glm::vec3> getLog();

private:

int select_index;

int next_index;

glm::vec3 location;

deque<glm::vec3> log;

};

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) {};

vector<glm::vec3> location_list;

vector<vector<int>> next_index_list;

vector<int> destination_list;

vector<unique_ptr<Actor>> actor_list;

glm::vec3 make_point(float theta);

};

#include "ofApp.h"	

//--------------------------------------------------------------
Actor::Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

	this->select_index = ofRandom(location_list.size());
	while (true) {

		auto itr = find(destination_list.begin(), destination_list.end(), this->select_index);
		if (itr == destination_list.end()) {

			destination_list.push_back(this->select_index);
			break;
		}

		this->select_index = (this->select_index + 1) % location_list.size();
	}

	this->next_index = this->select_index;
}

//--------------------------------------------------------------
void Actor::update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

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

		auto tmp_index = this->select_index;
		this->select_index = this->next_index;
		int retry = next_index_list[this->select_index].size();
		this->next_index = next_index_list[this->select_index][(int)ofRandom(next_index_list[this->select_index].size())];
		while (--retry > 0) {

			auto destination_itr = find(destination_list.begin(), destination_list.end(), this->next_index);
			if (destination_itr == destination_list.end()) {

				if (tmp_index != this->next_index) {

					destination_list.push_back(this->next_index);
					break;
				}
			}

			this->next_index = next_index_list[this->select_index][(this->next_index + 1) % next_index_list[this->select_index].size()];
		}
		if (retry <= 0) {

			destination_list.push_back(this->select_index);
			this->next_index = this->select_index;
		}
	}

	auto param = ofGetFrameNum() % frame_span;
	auto distance = location_list[this->next_index] - location_list[this->select_index];
	this->location = location_list[this->select_index] + distance / frame_span * param;

	this->log.push_front(this->location);
	while (this->log.size() > 50) { this->log.pop_back(); }
}

//--------------------------------------------------------------
glm::vec3 Actor::getLocation() {

	return this->location;
}

//--------------------------------------------------------------
deque<glm::vec3> Actor::getLog() {

	return this->log;
}

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

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

	ofBackground(239);
	ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);
	

	ofFbo fbo;
	fbo.allocate(ofGetWidth(), ofGetHeight());
	fbo.begin();
	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);
	ofClear(0);

	ofBeginShape();
	for (int deg = 0; deg < 360; deg += 1) {

		ofVertex(this->make_point(deg * DEG_TO_RAD) * 20);
	}
	ofEndShape(true);

	fbo.end();

	auto span = 15;
	ofPixels pixels;
	fbo.readToPixels(pixels);
	for (int x = 60; x < 700; x += span) {

		for (int y = 0; y < 720; y += span) {

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

				this->location_list.push_back(glm::vec3(x - ofGetWidth() * 0.5, y - ofGetHeight() * 0.5, 0));
			}
		}
	}

	for (auto& location : this->location_list) {

		vector<int> next_index = vector<int>();
		int index = -1;
		for (auto& other : this->location_list) {

			index++;
			if (location == other) { continue; }

			float distance = glm::distance(location, other);
			if (distance <= span) {

				next_index.push_back(index);
			}
		}

		this->next_index_list.push_back(next_index);
	}

	for (int i = 0; i < 350; i++) {

		this->actor_list.push_back(make_unique<Actor>(this->location_list, this->next_index_list, this->destination_list));
	}
}

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

	int frame_span = 10;
	int prev_index_size = 0;

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

		prev_index_size = this->destination_list.size();
	}

	for (auto& actor : this->actor_list) {

		actor->update(frame_span, this->location_list, this->next_index_list, this->destination_list);
	}

	if (prev_index_size != 0) {

		this->destination_list.erase(this->destination_list.begin(), this->destination_list.begin() + prev_index_size);
	}
}

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

	ofTranslate(ofGetWindowSize() * 0.5 + glm::vec2(0, -50));

	ofSetColor(255, 0, 0);
	for (auto& actor : this->actor_list) {

		for (auto& l : actor->getLog()) {

			ofDrawRectangle(l, 10, 10);
		}
	}

	ofSetColor(255);
	for (auto& actor : this->actor_list) {

		for (auto& l : actor->getLog()) {

			ofDrawRectangle(l, 3, 3);
		}
	}
}

//--------------------------------------------------------------
// Reference by https://twitter.com/shiffman/status/1095764239665512453
glm::vec3 ofApp::make_point(float theta) {

	float x = 16 * (pow(sin(theta), 3));
	float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta);
	return glm::vec3(x, -y, 0);
}

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

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

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#include "ofApp.h"

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

Actor::Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

this->select_index = ofRandom(location_list.size());

while (true) {

auto itr = find(destination_list.begin(), destination_list.end(), this->select_index);

if (itr == destination_list.end()) {

destination_list.push_back(this->select_index);

break;

}

this->select_index = (this->select_index + 1) % location_list.size();

}

this->next_index = this->select_index;

}

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

void Actor::update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

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

auto tmp_index = this->select_index;

this->select_index = this->next_index;

int retry = next_index_list[this->select_index].size();

this->next_index = next_index_list[this->select_index][(int)ofRandom(next_index_list[this->select_index].size())];

while (--retry > 0) {

auto destination_itr = find(destination_list.begin(), destination_list.end(), this->next_index);

if (destination_itr == destination_list.end()) {

if (tmp_index != this->next_index) {

destination_list.push_back(this->next_index);

break;

}

this->next_index = next_index_list[this->select_index][(this->next_index + 1) % next_index_list[this->select_index].size()];

}

if (retry <= 0) {

destination_list.push_back(this->select_index);

this->next_index = this->select_index;

}

auto param = ofGetFrameNum() % frame_span;

auto distance = location_list[this->next_index] - location_list[this->select_index];

this->location = location_list[this->select_index] + distance / frame_span * param;

this->log.push_front(this->location);

while (this->log.size() > 50) { this->log.pop_back(); }

}

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

glm::vec3 Actor::getLocation() {

return this->location;

}

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

deque<glm::vec3> Actor::getLog() {

return this->log;

}

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

ofFbo fbo;

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

fbo.begin();

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

ofClear(0);

ofBeginShape();

for (int deg = 0; deg < 360; deg += 1) {

ofVertex(this->make_point(deg * DEG_TO_RAD) * 20);

}

ofEndShape(true);

fbo.end();

auto span = 15;

ofPixels pixels;

fbo.readToPixels(pixels);

for (int x = 60; x < 700; x += span) {

for (int y = 0; y < 720; y += span) {

ofColor color = pixels.getColor(x, y);

if (color != ofColor(0, 0)) {

this->location_list.push_back(glm::vec3(x - ofGetWidth() * 0.5, y - ofGetHeight() * 0.5, 0));

}

for (auto& location : this->location_list) {

vector<int> next_index = vector<int>();

int index = -1;

for (auto& other : this->location_list) {

index++;

if (location == other) { continue; }

float distance = glm::distance(location, other);

if (distance <= span) {

next_index.push_back(index);

}

this->next_index_list.push_back(next_index);

}

for (int i = 0; i < 350; i++) {

this->actor_list.push_back(make_unique<Actor>(this->location_list, this->next_index_list, this->destination_list));

}

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

void ofApp::update() {

int frame_span = 10;

int prev_index_size = 0;

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

prev_index_size = this->destination_list.size();

}

for (auto& actor : this->actor_list) {

actor->update(frame_span, this->location_list, this->next_index_list, this->destination_list);

}

if (prev_index_size != 0) {

this->destination_list.erase(this->destination_list.begin(), this->destination_list.begin() + prev_index_size);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5 + glm::vec2(0, -50));

ofSetColor(255, 0, 0);

for (auto& actor : this->actor_list) {

for (auto& l : actor->getLog()) {

ofDrawRectangle(l, 10, 10);

}

ofSetColor(255);

for (auto& actor : this->actor_list) {

for (auto& l : actor->getLog()) {

ofDrawRectangle(l, 3, 3);

}

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

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

glm::vec3 ofApp::make_point(float theta) {

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

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

return glm::vec3(x, -y, 0);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230509

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2023年5月8日

Blue heart. Draw by openFrameworks

[ Video ]

[ About ]
青い心。

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

public:
	void setup();
	void update();
	void draw();

	void keyPressed(int key) {};
	void keyReleased(int key) {};
	void mouseMoved(int x, int y) {};
	void mouseDragged(int x, int y, int button) {};
	void mousePressed(int x, int y, int button) {};
	void mouseReleased(int x, int y, int button) {};
	void mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	glm::vec3 make_point(float theta);

	float noise_param;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

void mouseMoved(int x, int y) {};

void mouseDragged(int x, int y, int button) {};

void mousePressed(int x, int y, int button) {};

void mouseReleased(int x, int y, int button) {};

void mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

glm::vec3 make_point(float theta);

float noise_param;

};

#include "ofApp.h"	

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openFrameworks");
	
	ofBackground(239);
	ofSetColor(0, 0, 255);
	ofNoFill();
	ofSetLineWidth(2);
}

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

	ofSeedRandom(139);

	noise_param += 0.013;
}

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

	ofTranslate(ofGetWindowSize() * 0.5 + glm::vec2(0, -50));

	vector<ofColor> color_list;
	for (int value = 192; value >= 0; value -= 16) {

		color_list.push_back(ofColor(0, 0, value));
	}

	float scale_span = 5;
	float deg_span = 5;

	for (int i = 0; i < color_list.size(); i++) {
	
		ofMesh mesh;
		float noise_seed = ofRandom(1000);
		for (float scale = 5; scale < 20; scale += scale_span) {

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

				auto noise_location = this->make_point((deg + deg_span * 0.5) * DEG_TO_RAD) * (scale + scale_span * 0.5);
				auto noise_value = ofNoise(noise_seed, noise_location.x * 0.005, noise_location.y * 0.005, noise_param);

				if (noise_value > 0.485 && noise_value < 0.515) {

					mesh.addVertex(this->make_point(deg * DEG_TO_RAD) * scale);
					mesh.addVertex(this->make_point((deg + deg_span) * DEG_TO_RAD) * scale);
					mesh.addVertex(this->make_point((deg + deg_span) * DEG_TO_RAD) * (scale + scale_span));
					mesh.addVertex(this->make_point(deg * DEG_TO_RAD) * (scale + scale_span));

					mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 2); mesh.addIndex(mesh.getNumVertices() - 3);
					mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 3); mesh.addIndex(mesh.getNumVertices() - 4);

					mesh.addColor(color_list[i]);
					mesh.addColor(color_list[i]);
					mesh.addColor(color_list[i]);
					mesh.addColor(color_list[i]);
				}
			}
		}
		mesh.draw();
	}

	ofBeginShape();
	for (float deg = 0; deg < 360; deg += 1) {

		ofVertex(this->make_point(deg * DEG_TO_RAD) * 20);
	}
	ofEndShape(true);

}

//--------------------------------------------------------------
// Reference by https://twitter.com/shiffman/status/1095764239665512453
glm::vec3 ofApp::make_point(float theta) {

	float x = 16 * (pow(sin(theta), 3));
	float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta);
	return glm::vec3(x, -y, 0);
}


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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(0, 0, 255);

ofNoFill();

ofSetLineWidth(2);

}

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

void ofApp::update() {

ofSeedRandom(139);

noise_param += 0.013;

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5 + glm::vec2(0, -50));

vector<ofColor> color_list;

for (int value = 192; value >= 0; value -= 16) {

color_list.push_back(ofColor(0, 0, value));

}

float scale_span = 5;

float deg_span = 5;

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

ofMesh mesh;

float noise_seed = ofRandom(1000);

for (float scale = 5; scale < 20; scale += scale_span) {

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

auto noise_location = this->make_point((deg + deg_span * 0.5) * DEG_TO_RAD) * (scale + scale_span * 0.5);

auto noise_value = ofNoise(noise_seed, noise_location.x * 0.005, noise_location.y * 0.005, noise_param);

if (noise_value > 0.485 && noise_value < 0.515) {

mesh.addVertex(this->make_point(deg * DEG_TO_RAD) * scale);

mesh.addVertex(this->make_point((deg + deg_span) * DEG_TO_RAD) * scale);

mesh.addVertex(this->make_point((deg + deg_span) * DEG_TO_RAD) * (scale + scale_span));

mesh.addVertex(this->make_point(deg * DEG_TO_RAD) * (scale + scale_span));

mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 2); mesh.addIndex(mesh.getNumVertices() - 3);

mesh.addIndex(mesh.getNumVertices() - 1); mesh.addIndex(mesh.getNumVertices() - 3); mesh.addIndex(mesh.getNumVertices() - 4);

mesh.addColor(color_list[i]);

}

mesh.draw();

}

ofBeginShape();

for (float deg = 0; deg < 360; deg += 1) {

ofVertex(this->make_point(deg * DEG_TO_RAD) * 20);

}

ofEndShape(true);

}

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

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

glm::vec3 ofApp::make_point(float theta) {

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

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

return glm::vec3(x, -y, 0);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230508

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