openFrameworks – ページ 561 – プログラミング de 落描き

2019年9月18日2019年9月18日

Over 1000 days. openFrameworks20190918

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[ About ]
気づいたら1000日目越えてた…

Over 1000 days.

[ Source ]

#pragma once
#include "ofMain.h"
#include "Actor.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) {};

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

	vector<Actor*> actors;
	vector<ofColor> color_list;
};

#pragma once

#include "ofMain.h"

#include "Actor.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) {};

ofEasyCam cam;

vector<glm::vec3> location_list;

vector<vector<int>> next_index_list;

vector<int> destination_list;

vector<Actor*> actors;

vector<ofColor> color_list;

};

#include "ofApp.h"	

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

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

	ofBackground(239);
	ofEnableDepthTest();

	ofFbo fbo;
	fbo.allocate(ofGetWidth(), ofGetHeight());
	fbo.begin();
	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);
	ofRotate(90);
	ofClear(0);
	ofSetColor(0);

	ofTrueTypeFont font;
	font.loadFont("fonts/Kazesawa-Bold.ttf", 200, true, true, true);
	/* https://github.com/kazesawa/kazesawa */

	font.drawString("1006", font.stringWidth("1006") * -0.5, 0);
	font.drawString("Days", font.stringWidth("Days") * -0.5, font.stringHeight("Days") * 1);

	fbo.end();

	ofPixels pixels;
	fbo.readToPixels(pixels);
	auto span = 10;

	ofColor pix_color;
	for (int x = 0; x < fbo.getWidth(); x += span) {

		for (int y = 0; y < fbo.getHeight(); y += span) {

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

				for (int z = span * -1; z <= span * 1; z += span) {

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

	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 < 2000; i++) {

		this->actors.push_back(new Actor(this->location_list, this->next_index_list, this->destination_list));
	}
}


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

	int frame_span = 15;
	int prev_index_size = 0;

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

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

	for (auto actor : this->actors) {

		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() {

	this->cam.begin();
	ofRotate(90);
	ofRotateX(180);

	int index = 0;
	for (auto actor : this->actors) {

		actor->draw();
	}

	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(239);

ofEnableDepthTest();

ofFbo fbo;

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

fbo.begin();

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

ofRotate(90);

ofClear(0);

ofSetColor(0);

ofTrueTypeFont font;

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

/* https://github.com/kazesawa/kazesawa */

font.drawString("1006", font.stringWidth("1006") * -0.5, 0);

font.drawString("Days", font.stringWidth("Days") * -0.5, font.stringHeight("Days") * 1);

fbo.end();

ofPixels pixels;

fbo.readToPixels(pixels);

auto span = 10;

ofColor pix_color;

for (int x = 0; x < fbo.getWidth(); x += span) {

for (int y = 0; y < fbo.getHeight(); y += span) {

pix_color = pixels.getColor(x, y);

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

for (int z = span * -1; z <= span * 1; z += span) {

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

}

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 < 2000; i++) {

this->actors.push_back(new Actor(this->location_list, this->next_index_list, this->destination_list));

}

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

void ofApp::update() {

int frame_span = 15;

int prev_index_size = 0;

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

prev_index_size = this->destination_list.size();

}

for (auto actor : this->actors) {

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() {

this->cam.begin();

ofRotate(90);

ofRotateX(180);

int index = 0;

for (auto actor : this->actors) {

actor->draw();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

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

private:

	int select_index;
	int next_index;

	glm::vec3 location;

	ofColor color;
};

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

void draw();

private:

int select_index;

int next_index;

glm::vec3 location;

ofColor color;

};

#include "Actor.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;

	vector<int> hex_list = { 0x06BEE1, 0x1768AC, 0x2541B2, 0x03256C, 0xEFEFEF };
	int color_index = ofRandom(hex_list.size());
	this->color.setHex(hex_list[color_index]);
}

//--------------------------------------------------------------
void Actor::update(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;
}

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

	ofFill();
	ofSetColor(this->color);
	ofDrawBox(this->location, 9);

	ofNoFill();
	ofSetColor(39);
	ofDrawBox(this->location, 10);
}

#include "Actor.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;

vector<int> hex_list = { 0x06BEE1, 0x1768AC, 0x2541B2, 0x03256C, 0xEFEFEF };

int color_index = ofRandom(hex_list.size());

this->color.setHex(hex_list[color_index]);

}

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

void Actor::update(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;

}

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

void Actor::draw() {

ofFill();

ofSetColor(this->color);

ofDrawBox(this->location, 9);

ofNoFill();

ofSetColor(39);

ofDrawBox(this->location, 10);

}

[ Link ]
https://github.com/junkiyoshi/Insta20190918

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2019年9月17日2019年9月17日

Piece of square. openFrameworks

[ Video ]

[ About ]
正方形の破片。

Piece of square.

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

	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) {};

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

vector<ofColor> color_list;

};

#include "ofApp.h"	

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

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

	ofBackground(239);
	ofSetBackgroundAuto(false);
	ofSetLineWidth(2);

	ofColor color;
	vector<int> hex_list = { 0x247BA0, 0x70C1B3, 0xB2DBBF, 0xF3FFBD, 0xFF1654 };
	for (auto hex : hex_list) {

		color.setHex(hex);
		this->color_list.push_back(color);
	}
}


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

}

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

	int span = 144;
	int len = 134;

	int count = 0;
	for (int x = span * 0.5; x < ofGetWidth() + span * 0.5; x += span) {

		for (int y = span * 0.5; y < ofGetHeight() + span * 0.5; y += span) {

			if (ofGetFrameNum() % 20 == 0) {

				ofPushMatrix();
				ofTranslate(x, y);

				vector<glm::vec2> vertices;
				int param_start = ofRandom(100);
				int param_end = param_start + ofRandom(25, 50);

				for (int param = param_start; param <= param_end; param++) {

					vertices.push_back(this->make_point(len, param));
				}

				ofFill();
				ofSetColor(this->color_list[(int)ofRandom(this->color_list.size())]);
				ofBeginShape();
				ofVertices(vertices);
				ofEndShape(true);

				ofNoFill();
				ofSetColor(239);
				ofBeginShape();
				ofVertices(vertices);
				ofEndShape(true);

				ofPopMatrix();
			}

			count++;
		}
	}

	for (int i = 0; i < 1000; i++) {

		float x = ofRandom(ofGetWidth());
		float y = ofRandom(ofGetHeight());

		ofSetColor(255, 32);
		ofDrawCircle(x, y, 0.5);
	}
}

//--------------------------------------------------------------
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());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetBackgroundAuto(false);

ofSetLineWidth(2);

ofColor color;

vector<int> hex_list = { 0x247BA0, 0x70C1B3, 0xB2DBBF, 0xF3FFBD, 0xFF1654 };

for (auto hex : hex_list) {

color.setHex(hex);

this->color_list.push_back(color);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

int span = 144;

int len = 134;

int count = 0;

for (int x = span * 0.5; x < ofGetWidth() + span * 0.5; x += span) {

for (int y = span * 0.5; y < ofGetHeight() + span * 0.5; y += span) {

if (ofGetFrameNum() % 20 == 0) {

ofPushMatrix();

ofTranslate(x, y);

vector<glm::vec2> vertices;

int param_start = ofRandom(100);

int param_end = param_start + ofRandom(25, 50);

for (int param = param_start; param <= param_end; param++) {

vertices.push_back(this->make_point(len, param));

}

ofFill();

ofSetColor(this->color_list[(int)ofRandom(this->color_list.size())]);

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

ofNoFill();

ofSetColor(239);

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

ofPopMatrix();

}

count++;

}

for (int i = 0; i < 1000; i++) {

float x = ofRandom(ofGetWidth());

float y = ofRandom(ofGetHeight());

ofSetColor(255, 32);

ofDrawCircle(x, y, 0.5);

}

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

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/Insta20190917

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2019年9月16日

NEROT Workshop. openFrameworks

[ Video ]

[ About ]
p5.jsで体験した#NEORT ワークショップの内容をopenFrameworksで復習。

Review the contents of the workshop I experienced yesterday.

[ 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) {};

	vector<ofColor> color_list;

	void draw_arc(glm::vec2 location, float radius, int start_deg, int stop_deg);
};

#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) {};

vector<ofColor> color_list;

void draw_arc(glm::vec2 location, float radius, int start_deg, int stop_deg);

};

#include "ofApp.h"	

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

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

	ofColor color;
	color.setHex(0xD7E8DC);
	ofBackground(color);

	color.setHex(0x0E8BAD);
	this->color_list.push_back(color);
	color.setHex(0x3B6469);
	this->color_list.push_back(color);
	color.setHex(0xCA6A4A);
	this->color_list.push_back(color);
	color.setHex(0xBD2831);
	this->color_list.push_back(color);
}


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

	ofSeedRandom(39);
}

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

	int span = 72;
	int radius = 30;

	for (int x = span * 0.5; x < ofGetWidth() + span * 0.5; x += span) {

		for (int y = span * 0.5; y < ofGetHeight() + span * 0.5; y += span) {

			int identity = ofRandom(1000);
			identity = identity / 60 * 60;
			int rotate_param = ofRandom(4) + (identity + ofGetFrameNum()) / 240;
			int identity_param = (identity + ofGetFrameNum()) % 240;
			int add_rotate = identity_param < 210 ? 0 : ofMap(identity_param, 210, 240, 0, 90);

			ofPushMatrix();
			ofTranslate(x, y);
			ofRotate(rotate_param * 90 + add_rotate);

			int color_index = ofRandom(this->color_list.size());
			ofSetColor(this->color_list[color_index]);

			this->draw_arc(glm::vec2(), radius, 0, 270);

			ofPopMatrix();
		}
	}

	for (int i = 0; i < 6000; i++) {

		float x = ofRandom(ofGetWidth());
		float y = ofRandom(ofGetHeight());

		ofSetColor(255, 32);
		ofDrawCircle(x, y, 0.5);
	}
}

//--------------------------------------------------------------
void ofApp::draw_arc(glm::vec2 location, float radius, int start_deg, int stop_deg) {

	vector<glm::vec2> vertices;
	for (int deg = start_deg; deg <= stop_deg; deg++) {

		vertices.push_back(location + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));
	}
	vertices.push_back(location);

	ofFill();

	ofBeginShape();
	ofVertices(vertices);
	ofEndShape(true);

	ofSetColor(39);
	ofNoFill();

	ofBeginShape();
	ofVertices(vertices);
	ofEndShape(true);
}


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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofColor color;

color.setHex(0xD7E8DC);

ofBackground(color);

color.setHex(0x0E8BAD);

this->color_list.push_back(color);

color.setHex(0x3B6469);

this->color_list.push_back(color);

color.setHex(0xCA6A4A);

this->color_list.push_back(color);

color.setHex(0xBD2831);

this->color_list.push_back(color);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

int span = 72;

int radius = 30;

for (int x = span * 0.5; x < ofGetWidth() + span * 0.5; x += span) {

for (int y = span * 0.5; y < ofGetHeight() + span * 0.5; y += span) {

int identity = ofRandom(1000);

identity = identity / 60 * 60;

int rotate_param = ofRandom(4) + (identity + ofGetFrameNum()) / 240;

int identity_param = (identity + ofGetFrameNum()) % 240;

int add_rotate = identity_param < 210 ? 0 : ofMap(identity_param, 210, 240, 0, 90);

ofPushMatrix();

ofTranslate(x, y);

ofRotate(rotate_param * 90 + add_rotate);

int color_index = ofRandom(this->color_list.size());

ofSetColor(this->color_list[color_index]);

this->draw_arc(glm::vec2(), radius, 0, 270);

ofPopMatrix();

}

for (int i = 0; i < 6000; i++) {

float x = ofRandom(ofGetWidth());

float y = ofRandom(ofGetHeight());

ofSetColor(255, 32);

ofDrawCircle(x, y, 0.5);

}

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

void ofApp::draw_arc(glm::vec2 location, float radius, int start_deg, int stop_deg) {

vector<glm::vec2> vertices;

for (int deg = start_deg; deg <= stop_deg; deg++) {

vertices.push_back(location + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

}

vertices.push_back(location);

ofFill();

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

ofSetColor(39);

ofNoFill();

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20190916

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