openFrameworks – ページ 546 – プログラミング de 落描き

2021年1月29日2021年1月29日

Color orbs. Draw by openFrameworks

[ Video ]

[ About ]
Color orbs.

[ 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) {};

	int number_of_targets;
	vector<glm::vec2> target_list;
	vector<glm::vec3> color_list;
	ofShader shader;
};

#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) {};

int number_of_targets;

vector<glm::vec2> target_list;

vector<glm::vec3> color_list;

ofShader shader;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");
	
	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	this->number_of_targets = 30;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->target_list.push_back(glm::vec2());
		this->color_list.push_back(glm::vec3());
	}

	this->shader.load("shader/shader.vert", "shader/shader.frag");
}
//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);

	for (int i = 0; i < this->number_of_targets; i++) {

		auto location_noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
		this->target_list[i] = glm::vec2(
			ofMap(ofNoise(location_noise_seed.x, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetWidth() - 30),
			ofMap(ofNoise(location_noise_seed.y, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetHeight() - 30));
		
		auto color_noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));
		this->color_list[i] = glm::vec3(
			ofMap(ofNoise(color_noise_seed.x, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),
			ofMap(ofNoise(color_noise_seed.y, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),
			ofMap(ofNoise(color_noise_seed.z, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1));
	}
}

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

	ofFill();
	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform2fv("targets", &this->target_list[0].x, this->number_of_targets);
	this->shader.setUniform3fv("colors", &this->color_list[0].x, this->number_of_targets);

	ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

	this->shader.end();

	for (int i = 0; i < this->number_of_targets; i++) {

		ofSetColor(this->color_list[i].x * 255, this->color_list[i].y * 255, this->color_list[i].z * 255);

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

			ofVertex(this->target_list[i] + glm::vec2(30 * cos(deg * DEG_TO_RAD), 30 * sin(deg * DEG_TO_RAD)));
		}
		for (int deg = 360; deg >= 0; deg -= 1) {

			ofVertex(this->target_list[i] + glm::vec2(33 * cos(deg * DEG_TO_RAD), 33 * sin(deg * DEG_TO_RAD)));
		}
		ofEndShape(true);
	}
}

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(720, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

this->number_of_targets = 30;

for (int i = 0; i < this->number_of_targets; i++) {

this->target_list.push_back(glm::vec2());

this->color_list.push_back(glm::vec3());

}

this->shader.load("shader/shader.vert", "shader/shader.frag");

}

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

void ofApp::update() {

ofSeedRandom(39);

for (int i = 0; i < this->number_of_targets; i++) {

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

this->target_list[i] = glm::vec2(

ofMap(ofNoise(location_noise_seed.x, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetWidth() - 30),

ofMap(ofNoise(location_noise_seed.y, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetHeight() - 30));

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

this->color_list[i] = glm::vec3(

ofMap(ofNoise(color_noise_seed.x, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),

ofMap(ofNoise(color_noise_seed.y, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),

ofMap(ofNoise(color_noise_seed.z, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1));

}

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

void ofApp::draw() {

ofFill();

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniform2fv("targets", &this->target_list[0].x, this->number_of_targets);

this->shader.setUniform3fv("colors", &this->color_list[0].x, this->number_of_targets);

ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

this->shader.end();

for (int i = 0; i < this->number_of_targets; i++) {

ofSetColor(this->color_list[i].x * 255, this->color_list[i].y * 255, this->color_list[i].z * 255);

ofBeginShape();

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

ofVertex(this->target_list[i] + glm::vec2(30 * cos(deg * DEG_TO_RAD), 30 * sin(deg * DEG_TO_RAD)));

}

for (int deg = 360; deg >= 0; deg -= 1) {

ofVertex(this->target_list[i] + glm::vec2(33 * cos(deg * DEG_TO_RAD), 33 * sin(deg * DEG_TO_RAD)));

}

ofEndShape(true);

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(720, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;

void main(){
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

void main(){

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

const int number_of_targets = 30;

uniform float time;
uniform vec2 resolution;
uniform vec2 targets[number_of_targets];
uniform vec3 colors[number_of_targets];

out vec4 outputColor;

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);
  vec3 color = vec3(0.0);
  for(int i = 0; i < number_of_targets; i++){

    vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;
    t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

    float v = 0.05 / length(p - t);
	float r = v * colors[i].x;
	float g = v * colors[i].y;
	float b = v * colors[i].z;
    vec3 c = vec3(smoothstep(0.05, 1.0, r), smoothstep(0.05, 1.0, g), smoothstep(0.05, 1.0, b));
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 30;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets[number_of_targets];

uniform vec3 colors[number_of_targets];

out vec4 outputColor;

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

vec3 color = vec3(0.0);

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

vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;

t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

float v = 0.05 / length(p - t);

float r = v * colors[i].x;

float g = v * colors[i].y;

float b = v * colors[i].z;

vec3 c = vec3(smoothstep(0.05, 1.0, r), smoothstep(0.05, 1.0, g), smoothstep(0.05, 1.0, b));

color += c;

}

outputColor = vec4(color, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20210129

2021年1月28日2021年1月28日

Over 1505 days. Draw by openFrameworks

[ Video ]

[ About ]
Over 1505 days.

[ 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) {};

	ofTrueTypeFont font;
	ofFbo fbo1, fbo2;
	ofShader shader;
};

#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) {};

ofTrueTypeFont font;

ofFbo fbo1, fbo2;

ofShader shader;

};

#include "ofApp.h"

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

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

	ofBackground(239);

	this->font.loadFont("fonts/Kazesawa-Bold.ttf", 180, true, true, true);
	this->fbo1.allocate(ofGetWidth(), ofGetHeight());
	this->fbo2.allocate(ofGetWidth(), ofGetHeight());
	this->shader.load("shader/shader.vert", "shader/shader.frag");
}

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

	this->fbo1.begin();
	ofClear(0);
	ofSetColor(39);

	vector<string> word_list = {
		"over",
		"15  5",
		"days"
	};

	vector<glm::vec2> base_location_list = {
		glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[0]) * 0.5, ofGetHeight() * 0.5 - 150),
		glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[1]) * 0.5, ofGetHeight() * 0.5 + 60),
		glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[2]) * 0.5, ofGetHeight() * 0.5 + 270)
	};

	this->font.drawString(word_list[0], base_location_list[0].x, base_location_list[0].y);
	this->font.drawString(word_list[1], base_location_list[1].x, base_location_list[1].y);
	this->font.drawString(word_list[2], base_location_list[2].x, base_location_list[2].y);

	this->fbo1.end();

	this->fbo2.begin();
	ofClear(0);
	ofSetColor(39);

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

	int radius = 30;

	ofFill();
	ofDrawCircle(glm::vec2(ofGetWidth() * 0.1, 0), radius);

	auto deg_span = 15;
	for (auto deg_start = ofGetFrameNum() * 0.2; deg_start <= ofGetFrameNum() * 0.5 + 360; deg_start += deg_span * 2) {

		vector<glm::vec2> vertices_1, vertices_2;
		for (auto deg = deg_start; deg <= deg_start + deg_span; deg++) {

			vertices_1.push_back(glm::vec2((radius + 10) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius + 10) * sin(deg * DEG_TO_RAD)));
			vertices_2.push_back(glm::vec2((radius * 14) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius * 14) * sin(deg * DEG_TO_RAD)));
		}

		reverse(vertices_2.begin(), vertices_2.end());

		ofBeginShape();
		ofVertices(vertices_1);
		ofVertices(vertices_2);
		ofEndShape(true);
	}
	
	this->fbo2.end();
}

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

	ofSetColor(255);
	ofFill();
	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex1", this->fbo1.getTexture(), 1);
	this->shader.setUniformTexture("tex2", this->fbo2.getTexture(), 2);

	ofDrawRectangle(glm::vec2(0, 0), ofGetWidth(), ofGetHeight());

	this->shader.end();
}

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(720, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

this->font.loadFont("fonts/Kazesawa-Bold.ttf", 180, true, true, true);

this->fbo1.allocate(ofGetWidth(), ofGetHeight());

this->fbo2.allocate(ofGetWidth(), ofGetHeight());

this->shader.load("shader/shader.vert", "shader/shader.frag");

}

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

void ofApp::update() {

this->fbo1.begin();

ofClear(0);

ofSetColor(39);

vector<string> word_list = {

"over",

"15 5",

"days"

};

vector<glm::vec2> base_location_list = {

glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[0]) * 0.5, ofGetHeight() * 0.5 - 150),

glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[1]) * 0.5, ofGetHeight() * 0.5 + 60),

glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[2]) * 0.5, ofGetHeight() * 0.5 + 270)

};

this->font.drawString(word_list[0], base_location_list[0].x, base_location_list[0].y);

this->font.drawString(word_list[1], base_location_list[1].x, base_location_list[1].y);

this->font.drawString(word_list[2], base_location_list[2].x, base_location_list[2].y);

this->fbo1.end();

this->fbo2.begin();

ofClear(0);

ofSetColor(39);

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

int radius = 30;

ofFill();

ofDrawCircle(glm::vec2(ofGetWidth() * 0.1, 0), radius);

auto deg_span = 15;

for (auto deg_start = ofGetFrameNum() * 0.2; deg_start <= ofGetFrameNum() * 0.5 + 360; deg_start += deg_span * 2) {

vector<glm::vec2> vertices_1, vertices_2;

for (auto deg = deg_start; deg <= deg_start + deg_span; deg++) {

vertices_1.push_back(glm::vec2((radius + 10) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius + 10) * sin(deg * DEG_TO_RAD)));

vertices_2.push_back(glm::vec2((radius * 14) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius * 14) * sin(deg * DEG_TO_RAD)));

}

reverse(vertices_2.begin(), vertices_2.end());

ofBeginShape();

ofVertices(vertices_1);

ofVertices(vertices_2);

ofEndShape(true);

}

this->fbo2.end();

}

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

void ofApp::draw() {

ofSetColor(255);

ofFill();

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniformTexture("tex1", this->fbo1.getTexture(), 1);

this->shader.setUniformTexture("tex2", this->fbo2.getTexture(), 2);

ofDrawRectangle(glm::vec2(0, 0), ofGetWidth(), ofGetHeight());

this->shader.end();

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(720, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;
in vec2 texcoord;
out vec2 texCoordVarying;

void main(){

	texCoordVarying = texcoord;
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

in vec2 texcoord;

out vec2 texCoordVarying;

void main(){

texCoordVarying = texcoord;

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex1;
uniform sampler2DRect tex2;

in vec2 texCoordVarying;
out vec4 outputColor;

void main() {

  vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  
  vec4 c;
  if(t1 != vec4(0.0) && t2 == vec4(0.0)){
  
	c = t1;
  }else if(t1 == vec4(0.0) && t2 != vec4(0.0)){
  
	c = t2;
  }else{
  
	c = vec4(vec3(0.937), 1.0);
  }

  outputColor = c;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

in vec2 texCoordVarying;

out vec4 outputColor;

void main() {

vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 c;

if(t1 != vec4(0.0) && t2 == vec4(0.0)){

c = t1;

}else if(t1 == vec4(0.0) && t2 != vec4(0.0)){

c = t2;

}else{

c = vec4(vec3(0.937), 1.0);

}

outputColor = c;

}

[ Link ]
https://github.com/junkiyoshi/Insta20210128/

2021年1月27日2021年1月27日

Shell and noise. Draw by openFrameworks

[ Video ]

[ About ]
Shell and noise.

[ 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::vec3 make_shell_point(float a, float b, float c, float h, float k, float u, float v, float w, int R);

	ofEasyCam cam;
	ofMesh face, line;
};

#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::vec3 make_shell_point(float a, float b, float c, float h, float k, float u, float v, float w, int R);

ofEasyCam cam;

ofMesh face, line;

};

#include "ofApp.h"

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

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

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

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

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

	// Parameter reference by https://twitter.com/ru_sack/status/798308368007892992

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

	float a = 1.25;
	float b = 1.25;
	float c = 1.0;
	float h = 3.5;
	float k = 0;
	float w = 0.12;
	int R = 1;
	int scale = 40;

	float u_step = 0.3;
	int v_step = 15;

	int rotate_deg = ofGetFrameNum();

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

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

			rotate_deg += 40;
			float angle = rotate_deg * (float)DEG_TO_RAD;
			auto rotation = glm::rotate(glm::mat4(), angle, glm::vec3(0, 1, 0));

			for (float u = -35; u <= -1; u += u_step) {

				for (int v = 0; v <= 360; v += v_step) {

					auto noise_location = glm::vec2(x + cos(v * DEG_TO_RAD), y + sin(v * DEG_TO_RAD));
					if (ofNoise(glm::vec4(u * 0.005, noise_location * 0.5, ofGetFrameNum() * 0.01)) < 0.5) { continue; }

					vector<glm::vec3> vertices;
					vertices.push_back(this->make_shell_point(a, b, c, h, k, u + u_step * 0.5, (v + v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -4
					vertices.push_back(this->make_shell_point(a, b, c, h, k, u + u_step * 0.5, (v - v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -3
					vertices.push_back(this->make_shell_point(a, b, c, h, k, u - u_step * 0.5, (v - v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -2
					vertices.push_back(this->make_shell_point(a, b, c, h, k, u - u_step * 0.5, (v + v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -1

					for (auto& vertex : vertices) {

						vertex = glm::vec3(x, y, 0) + glm::vec4(vertex, 0) * rotation;
					}

					this->face.addVertices(vertices);

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

					this->line.addVertices(vertices);

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

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

	this->cam.begin();

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

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

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_shell_point(float a, float b, float c, float h, float k, float u, float v, float w, int R) {

	// 数学デッサン教室 描いて楽しむ数学たち 貝殻の形 shape of shell P.59

	float x = (h + a * cos(v)) * exp(w * u) * cos(c * u);
	float y = R * (h + a * cos(v)) * exp(w * u) * sin(c * u);
	float z = (k + b * sin(v)) * exp(w * u);

	return glm::vec3(x, y, z);
}

//--------------------------------------------------------------
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->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

}

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

void ofApp::update() {

// Parameter reference by https://twitter.com/ru_sack/status/798308368007892992

this->face.clear();

this->line.clear();

float a = 1.25;

float b = 1.25;

float c = 1.0;

float h = 3.5;

float k = 0;

float w = 0.12;

int R = 1;

int scale = 40;

float u_step = 0.3;

int v_step = 15;

int rotate_deg = ofGetFrameNum();

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

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

rotate_deg += 40;

float angle = rotate_deg * (float)DEG_TO_RAD;

auto rotation = glm::rotate(glm::mat4(), angle, glm::vec3(0, 1, 0));

for (float u = -35; u <= -1; u += u_step) {

for (int v = 0; v <= 360; v += v_step) {

auto noise_location = glm::vec2(x + cos(v * DEG_TO_RAD), y + sin(v * DEG_TO_RAD));

if (ofNoise(glm::vec4(u * 0.005, noise_location * 0.5, ofGetFrameNum() * 0.01)) < 0.5) { continue; }

vector<glm::vec3> vertices;

vertices.push_back(this->make_shell_point(a, b, c, h, k, u + u_step * 0.5, (v + v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -4

vertices.push_back(this->make_shell_point(a, b, c, h, k, u + u_step * 0.5, (v - v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -3

vertices.push_back(this->make_shell_point(a, b, c, h, k, u - u_step * 0.5, (v - v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -2

vertices.push_back(this->make_shell_point(a, b, c, h, k, u - u_step * 0.5, (v + v_step * 0.5) * DEG_TO_RAD, w, R) * scale); // -1

for (auto& vertex : vertices) {

vertex = glm::vec3(x, y, 0) + glm::vec4(vertex, 0) * rotation;

}

this->face.addVertices(vertices);

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

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

this->line.addVertices(vertices);

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

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

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

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

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(239);

this->face.draw();

ofSetColor(39);

this->line.draw();

this->cam.end();

}

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

glm::vec3 ofApp::make_shell_point(float a, float b, float c, float h, float k, float u, float v, float w, int R) {

// 数学デッサン教室描いて楽しむ数学たち貝殻の形 shape of shell P.59

float x = (h + a * cos(v)) * exp(w * u) * cos(c * u);

float y = R * (h + a * cos(v)) * exp(w * u) * sin(c * u);

float z = (k + b * sin(v)) * exp(w * u);

return glm::vec3(x, y, z);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210127

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