rect – ページ 8 – プログラミング de 落描き

2020年3月16日2020年3月16日

Plate with noise hole. openFrameworks

[ Video ]

[ About ]
ノイズ穴があいた板。

Plate with noise hole.

[ 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);

	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) {};

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

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);
	ofEnableDepthTest();

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

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

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

	int len = 500;
	int depth = 50;
	int base_radius = 200;

	for (int z = -250; z <= 250; z += 125) {

		for (int param = 0; param < 100; param++) {

			auto face_index = this->face.getNumVertices();
			auto frame_index = this->frame.getNumVertices();

			auto deg = param * 3.6 - 135;
			auto next_deg = (param + 1) * 3.6 - 135;

			int radius = ofMap(ofNoise(glm::vec4(base_radius * cos(deg * DEG_TO_RAD) * 0.005, base_radius * sin(deg * DEG_TO_RAD) * 0.005, z * 0.01, ofGetFrameNum() * 0.02)), 0, 1, base_radius - 30, base_radius + 30);
			int next_radius = ofMap(ofNoise(glm::vec4(base_radius * cos(next_deg * DEG_TO_RAD) * 0.005, base_radius * sin(next_deg * DEG_TO_RAD) * 0.005, z * 0.01, ofGetFrameNum() * 0.02)), 0, 1, base_radius - 30, base_radius + 30);

			vector<glm::vec3> vertices;
			vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z - depth * 0.5));
			vertices.push_back(glm::vec3(this->make_point(len, param), z - depth * 0.5));
			vertices.push_back(glm::vec3(this->make_point(len, param + 1), z - depth * 0.5));
			vertices.push_back(glm::vec3(next_radius * cos(next_deg * DEG_TO_RAD), next_radius * sin(next_deg * DEG_TO_RAD), z - depth * 0.5));

			vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z + depth * 0.5));
			vertices.push_back(glm::vec3(this->make_point(len, param), z + depth * 0.5));
			vertices.push_back(glm::vec3(this->make_point(len, param + 1), z + depth * 0.5));
			vertices.push_back(glm::vec3(next_radius * cos(next_deg * DEG_TO_RAD), next_radius * sin(next_deg * DEG_TO_RAD), z + depth * 0.5));

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

			this->face.addIndex(face_index + 0); this->face.addIndex(face_index + 1); this->face.addIndex(face_index + 2);
			this->face.addIndex(face_index + 0); this->face.addIndex(face_index + 2); this->face.addIndex(face_index + 3);

			this->face.addIndex(face_index + 4); this->face.addIndex(face_index + 5); this->face.addIndex(face_index + 6);
			this->face.addIndex(face_index + 4); this->face.addIndex(face_index + 6); this->face.addIndex(face_index + 7);

			this->face.addIndex(face_index + 0); this->face.addIndex(face_index + 3); this->face.addIndex(face_index + 7);
			this->face.addIndex(face_index + 0); this->face.addIndex(face_index + 7); this->face.addIndex(face_index + 4);

			this->face.addIndex(face_index + 1); this->face.addIndex(face_index + 5); this->face.addIndex(face_index + 6);
			this->face.addIndex(face_index + 1); this->face.addIndex(face_index + 6); this->face.addIndex(face_index + 2);

			this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index + 3);
			this->frame.addIndex(frame_index + 4); this->frame.addIndex(frame_index + 7);

			this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index + 2);
			this->frame.addIndex(frame_index + 5); this->frame.addIndex(frame_index + 6);
		}
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.5);

	ofSetColor(39);
	this->face.draw();

	ofSetColor(239);
	this->frame.drawWireframe();

	this->cam.end();
}

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

ofSetColor(39);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

this->face.clear();

this->frame.clear();

int len = 500;

int depth = 50;

int base_radius = 200;

for (int z = -250; z <= 250; z += 125) {

for (int param = 0; param < 100; param++) {

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

auto frame_index = this->frame.getNumVertices();

auto deg = param * 3.6 - 135;

auto next_deg = (param + 1) * 3.6 - 135;

int radius = ofMap(ofNoise(glm::vec4(base_radius * cos(deg * DEG_TO_RAD) * 0.005, base_radius * sin(deg * DEG_TO_RAD) * 0.005, z * 0.01, ofGetFrameNum() * 0.02)), 0, 1, base_radius - 30, base_radius + 30);

int next_radius = ofMap(ofNoise(glm::vec4(base_radius * cos(next_deg * DEG_TO_RAD) * 0.005, base_radius * sin(next_deg * DEG_TO_RAD) * 0.005, z * 0.01, ofGetFrameNum() * 0.02)), 0, 1, base_radius - 30, base_radius + 30);

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z - depth * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, param), z - depth * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, param + 1), z - depth * 0.5));

vertices.push_back(glm::vec3(next_radius * cos(next_deg * DEG_TO_RAD), next_radius * sin(next_deg * DEG_TO_RAD), z - depth * 0.5));

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

vertices.push_back(glm::vec3(this->make_point(len, param), z + depth * 0.5));

vertices.push_back(glm::vec3(this->make_point(len, param + 1), z + depth * 0.5));

vertices.push_back(glm::vec3(next_radius * cos(next_deg * DEG_TO_RAD), next_radius * sin(next_deg * DEG_TO_RAD), z + depth * 0.5));

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

this->face.addIndex(face_index + 0); this->face.addIndex(face_index + 1); this->face.addIndex(face_index + 2);

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

this->face.addIndex(face_index + 4); this->face.addIndex(face_index + 5); this->face.addIndex(face_index + 6);

this->face.addIndex(face_index + 4); this->face.addIndex(face_index + 6); this->face.addIndex(face_index + 7);

this->face.addIndex(face_index + 0); this->face.addIndex(face_index + 3); this->face.addIndex(face_index + 7);

this->face.addIndex(face_index + 0); this->face.addIndex(face_index + 7); this->face.addIndex(face_index + 4);

this->face.addIndex(face_index + 1); this->face.addIndex(face_index + 5); this->face.addIndex(face_index + 6);

this->face.addIndex(face_index + 1); this->face.addIndex(face_index + 6); this->face.addIndex(face_index + 2);

this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index + 3);

this->frame.addIndex(frame_index + 4); this->frame.addIndex(frame_index + 7);

this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index + 2);

this->frame.addIndex(frame_index + 5); this->frame.addIndex(frame_index + 6);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.5);

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

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/Insta20200316

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2020年1月30日2020年1月30日

Rotating half square. openFrameworks

[ Video ]

[ About ]
ハーフ正方形回転。

Rotating half 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 windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

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

	ofEasyCam cam;
	ofMesh mesh, 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) {};

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

ofEasyCam cam;

ofMesh mesh, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

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

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

	int len = 300;
	int width = 20;
	for(int len = 100; len <= 500; len += 25){
		
		auto angle_x = ofMap(ofNoise(noise_location.x, len * 0.001 + ofGetFrameNum() * 0.003), 0, 1, 0, PI * 2);
		auto angle_y = ofMap(ofNoise(noise_location.y, len * 0.001 + ofGetFrameNum() * 0.003), 0, 1, 0, PI * 2);
		auto angle_z = ofMap(ofNoise(noise_location.z, len * 0.001 + ofGetFrameNum() * 0.003), 0, 1, 0, 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 rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

		int start_param = ofRandom(1000) + ofGetFrameNum() * ofRandom(1, 1.5);
		int end_param = start_param + 55;
		int start_index = this->mesh.getNumVertices();
		for (int param = start_param; param <= end_param; param++) {

			int index = mesh.getNumVertices() - 2;

			vector<glm::vec3> vertices;
			vertices.push_back(glm::vec4(this->make_point(len, param), width *  0.5, 0) * rotation_z * rotation_y * rotation_x);
			vertices.push_back(glm::vec4(this->make_point(len, param), width * -0.5, 0) * rotation_z * rotation_y * rotation_x);

			mesh.addVertices(vertices);
			frame.addVertices(vertices);

			if (index > start_index) {

				mesh.addIndex(index + 0); mesh.addIndex(index + 1); mesh.addIndex(index + 3);
				mesh.addIndex(index + 0); mesh.addIndex(index + 2); mesh.addIndex(index + 3);

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

			if (param % 25 == 0) {

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

		frame.addIndex(start_index); frame.addIndex(start_index + 1);
		frame.addIndex(frame.getNumVertices() - 1); frame.addIndex(frame.getNumVertices() - 2);
	}
}

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

	this->cam.begin();

	ofSetColor(39);
	this->mesh.draw();

	ofSetColor(239);
	this->frame.drawWireframe();

	this->cam.end();
}

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

ofSetLineWidth(1.5);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->mesh.clear();

this->frame.clear();

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

int len = 300;

int width = 20;

for(int len = 100; len <= 500; len += 25){

auto angle_x = ofMap(ofNoise(noise_location.x, len * 0.001 + ofGetFrameNum() * 0.003), 0, 1, 0, PI * 2);

auto angle_y = ofMap(ofNoise(noise_location.y, len * 0.001 + ofGetFrameNum() * 0.003), 0, 1, 0, PI * 2);

auto angle_z = ofMap(ofNoise(noise_location.z, len * 0.001 + ofGetFrameNum() * 0.003), 0, 1, 0, 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 rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

int start_param = ofRandom(1000) + ofGetFrameNum() * ofRandom(1, 1.5);

int end_param = start_param + 55;

int start_index = this->mesh.getNumVertices();

for (int param = start_param; param <= end_param; param++) {

int index = mesh.getNumVertices() - 2;

vector<glm::vec3> vertices;

vertices.push_back(glm::vec4(this->make_point(len, param), width * 0.5, 0) * rotation_z * rotation_y * rotation_x);

vertices.push_back(glm::vec4(this->make_point(len, param), width * -0.5, 0) * rotation_z * rotation_y * rotation_x);

mesh.addVertices(vertices);

frame.addVertices(vertices);

if (index > start_index) {

mesh.addIndex(index + 0); mesh.addIndex(index + 1); mesh.addIndex(index + 3);

mesh.addIndex(index + 0); mesh.addIndex(index + 2); mesh.addIndex(index + 3);

frame.addIndex(index + 0); frame.addIndex(index + 2);

frame.addIndex(index + 1); frame.addIndex(index + 3);

}

if (param % 25 == 0) {

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

}

frame.addIndex(start_index); frame.addIndex(start_index + 1);

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

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(39);

this->mesh.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

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/Insta20200130

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2020年1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);

	ofMesh mesh;
	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);

ofMesh mesh;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);

	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() {

	ofSeedRandom(39);

	this->mesh.clear();

	int x_span = 256;
	int y_span = 240;

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

		for (int y = y_span * 0.5; y <= ofGetWidth(); y += y_span) {

			for (int in = 10; in < 220; in += 30) {

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

				int out = in + 15;
				int start_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 0, 100);
				int noise_value = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 1, 150);
				int end_param = start_param + noise_value;

				for (int param = start_param; param <= end_param; param++) {

					int index = this->mesh.getNumVertices();

					vector<glm::vec3> vertices;
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(in, param), 0));
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(out, param), 0));
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(out, param + 1), 0));
					vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(in, param + 1), 0));

					this->mesh.addVertices(vertices);

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

						this->mesh.addColor(color);
					}

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

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

	this->mesh.drawFaces();
}

//--------------------------------------------------------------
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(1280, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

100

101

102

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

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() {

ofSeedRandom(39);

this->mesh.clear();

int x_span = 256;

int y_span = 240;

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

for (int y = y_span * 0.5; y <= ofGetWidth(); y += y_span) {

for (int in = 10; in < 220; in += 30) {

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

ofColor color = this->color_list[color_index];

int out = in + 15;

int start_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 0, 100);

int noise_value = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 1, 150);

int end_param = start_param + noise_value;

for (int param = start_param; param <= end_param; param++) {

int index = this->mesh.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(in, param), 0));

vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(out, param), 0));

vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(out, param + 1), 0));

vertices.push_back(glm::vec3(x, y, 0) + glm::vec3(this->make_point(in, param + 1), 0));

this->mesh.addVertices(vertices);

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

this->mesh.addColor(color);

}

this->mesh.addIndex(index + 0); this->mesh.addIndex(index + 1); this->mesh.addIndex(index + 2);

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

}

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

void ofApp::draw() {

this->mesh.drawFaces();

}

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

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(1280, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200117

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