openFrameworks – ページ 491 – プログラミング de 落描き

2020年4月28日

Stacking triangles. openFrameworks

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[ About ]
Stacking triangles.

[ 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 radius, int deg);

	ofEasyCam cam;
	ofMesh face;
};

#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 radius, int deg);

ofEasyCam cam;

ofMesh face;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();
}

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

	this->face.clear();

	int radius = 150;
	int deg_span = 1;
	for (int z = -150; z <= 150; z += 1) {

		int deg_start_ini = ofMap(ofNoise(z * 0.005 + ofGetFrameNum() * 0.035), 0, 1, 0, 720);
		for (int deg_start = deg_start_ini; deg_start < deg_start_ini + 360; deg_start += 120) {

			for (int deg = deg_start; deg < deg_start + 75; deg += deg_span) {

				vector<glm::vec3> vertices;
				vertices.push_back(glm::vec3(this->make_point(radius, deg), z + 0.5));
				vertices.push_back(glm::vec3(this->make_point(radius, deg), z - 0.5));
				vertices.push_back(glm::vec3(this->make_point(radius, deg + deg_span), z - 0.5));
				vertices.push_back(glm::vec3(this->make_point(radius, deg + deg_span), z + 0.5));

				int face_index = this->face.getNumVertices();
				this->face.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);
			}
		}
	}
}

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

	this->cam.begin();

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

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

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec2 ofApp::make_point(int radius, int deg) {

	deg = deg % 360;

	int deg_a = (deg / 120) * 120;
	int deg_b = deg_a + 120;

	int remainder = deg % 120;
	int diff = deg - deg_a;

	auto point_a = glm::vec2(radius * cos(deg_a * DEG_TO_RAD), radius * sin(deg_a * DEG_TO_RAD));
	auto point_b = glm::vec2(radius * cos(deg_b * DEG_TO_RAD), radius * sin(deg_b * DEG_TO_RAD));
	auto distance = point_b - point_a;

	return point_a + (distance / 120) * diff;
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofEnableDepthTest();

}

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

void ofApp::update() {

this->face.clear();

int radius = 150;

int deg_span = 1;

for (int z = -150; z <= 150; z += 1) {

int deg_start_ini = ofMap(ofNoise(z * 0.005 + ofGetFrameNum() * 0.035), 0, 1, 0, 720);

for (int deg_start = deg_start_ini; deg_start < deg_start_ini + 360; deg_start += 120) {

for (int deg = deg_start; deg < deg_start + 75; deg += deg_span) {

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(this->make_point(radius, deg), z + 0.5));

vertices.push_back(glm::vec3(this->make_point(radius, deg), z - 0.5));

vertices.push_back(glm::vec3(this->make_point(radius, deg + deg_span), z - 0.5));

vertices.push_back(glm::vec3(this->make_point(radius, deg + deg_span), z + 0.5));

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

this->face.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);

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(39);

this->face.draw();

//ofSetColor(239);

//this->frame.drawWireframe();

this->cam.end();

}

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

glm::vec2 ofApp::make_point(int radius, int deg) {

deg = deg % 360;

int deg_a = (deg / 120) * 120;

int deg_b = deg_a + 120;

int remainder = deg % 120;

int diff = deg - deg_a;

auto point_a = glm::vec2(radius * cos(deg_a * DEG_TO_RAD), radius * sin(deg_a * DEG_TO_RAD));

auto point_b = glm::vec2(radius * cos(deg_b * DEG_TO_RAD), radius * sin(deg_b * DEG_TO_RAD));

auto distance = point_b - point_a;

return point_a + (distance / 120) * diff;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200428

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2020年4月27日

Velocity visualization of moving torus coordinates. openFrameworks

[ Video ]

[ About ]
Velocity visualization of moving torus coordinates.

[ 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_point(float R, float r, float u, float v);

	ofEasyCam cam;

	int number_of_obj;
	vector<glm::vec3> location_list;
	vector<glm::vec3> velocity_list;
	vector<float> life_list;

	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::vec3 make_point(float R, float r, float u, float v);

ofEasyCam cam;

int number_of_obj;

vector<glm::vec3> location_list;

vector<glm::vec3> velocity_list;

vector<float> life_list;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

	float R = 120;
	float r = 13;	
	int v_span = 8;
	int u_span = 10;

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

		for (auto u = 0; u < 360; u += u_span) {

			vector<glm::vec3> vertices;
			vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

			int index = face.getNumVertices();
			this->face.addVertices(vertices);

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

		}
	}

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

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

	float R = 120;
	float r = 15;
	for (int deg = 0; deg < 360; deg += 30) {

		float v = ofGetFrameNum() * 0.25 + deg;
		float u = (ofGetFrameNum() + deg * 2) * 10;
		float next_v = (ofGetFrameNum() + 1) * 0.25 + deg;
		float next_u = (ofGetFrameNum() + 1 + deg * 2) * 10;

		auto location = this->make_point(R, r, u, v);
		auto next = this->make_point(R, r, next_u, next_v);
		auto distance = location - next;
		
		auto future = glm::vec3(location) + distance * 80;
		auto random_deg_1 = ofRandom(360);
		auto random_deg_2 = ofRandom(360);
		future += glm::vec3(
			30 * cos(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),
			30 * sin(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),
			30 * cos(random_deg_2 * DEG_TO_RAD)
		);
		auto future_distance = future - location;
		
		this->frame.addVertex(location);
		this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance));
		this->life_list.push_back(100);
	}

	for (int i = 0; i < this->frame.getNumVertices(); i++) {

		this->frame.setVertex(i, this->frame.getVertex(i) + this->velocity_list[i]);
		this->life_list[i] += -3;
	}

	for (int i = this->velocity_list.size() - 1; i >= 0; i--) {

		if(this->life_list[i] < 0) {

			this->life_list.erase(this->life_list.begin() + i);
			this->velocity_list.erase(this->velocity_list.begin() + i);
			this->frame.removeVertex(i);
		}
	}

	this->frame.clearIndices();
	this->frame.clearColors();
	for (int i = 0; i < this->frame.getNumVertices(); i++) {

		this->frame.addColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));
		for (int k = i + 1; k < this->frame.getNumVertices(); k += 1) {

			if (glm::distance(this->frame.getVertex(i), this->frame.getVertex(k)) < 15) {

				this->frame.addIndex(i); this->frame.addIndex(k);
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateX(290);

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

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

	for (int i = 0; i < this->frame.getNumVertices(); i++) {

		ofSetColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));
		ofDrawSphere(this->frame.getVertex(i), 1);
	}

	this->frame.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

	// 数学デッサン教室 描いて楽しむ数学たち　P.31

	u *= DEG_TO_RAD;
	v *= DEG_TO_RAD;

	auto x = (R + r * cos(u)) * cos(v);
	auto y = (R + r * cos(u)) * sin(v);
	auto z = r * sin(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);

ofEnableDepthTest();

float R = 120;

float r = 13;

int v_span = 8;

int u_span = 10;

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

for (auto u = 0; u < 360; u += u_span) {

vector<glm::vec3> vertices;

vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));

vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

int index = face.getNumVertices();

this->face.addVertices(vertices);

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

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

}

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

}

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

void ofApp::update() {

float R = 120;

float r = 15;

for (int deg = 0; deg < 360; deg += 30) {

float v = ofGetFrameNum() * 0.25 + deg;

float u = (ofGetFrameNum() + deg * 2) * 10;

float next_v = (ofGetFrameNum() + 1) * 0.25 + deg;

float next_u = (ofGetFrameNum() + 1 + deg * 2) * 10;

auto location = this->make_point(R, r, u, v);

auto next = this->make_point(R, r, next_u, next_v);

auto distance = location - next;

auto future = glm::vec3(location) + distance * 80;

auto random_deg_1 = ofRandom(360);

auto random_deg_2 = ofRandom(360);

future += glm::vec3(

30 * cos(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),

30 * sin(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),

30 * cos(random_deg_2 * DEG_TO_RAD)

);

auto future_distance = future - location;

this->frame.addVertex(location);

this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance));

this->life_list.push_back(100);

}

for (int i = 0; i < this->frame.getNumVertices(); i++) {

this->frame.setVertex(i, this->frame.getVertex(i) + this->velocity_list[i]);

this->life_list[i] += -3;

}

for (int i = this->velocity_list.size() - 1; i >= 0; i--) {

if(this->life_list[i] < 0) {

this->life_list.erase(this->life_list.begin() + i);

this->velocity_list.erase(this->velocity_list.begin() + i);

this->frame.removeVertex(i);

}

this->frame.clearIndices();

this->frame.clearColors();

for (int i = 0; i < this->frame.getNumVertices(); i++) {

this->frame.addColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));

for (int k = i + 1; k < this->frame.getNumVertices(); k += 1) {

if (glm::distance(this->frame.getVertex(i), this->frame.getVertex(k)) < 15) {

this->frame.addIndex(i); this->frame.addIndex(k);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(290);

ofSetColor(239);

this->face.draw();

ofSetColor(39);

this->face.drawWireframe();

for (int i = 0; i < this->frame.getNumVertices(); i++) {

ofSetColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));

ofDrawSphere(this->frame.getVertex(i), 1);

}

this->frame.drawWireframe();

this->cam.end();

}

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

glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

// 数学デッサン教室描いて楽しむ数学たち　P.31

u *= DEG_TO_RAD;

v *= DEG_TO_RAD;

auto x = (R + r * cos(u)) * cos(v);

auto y = (R + r * cos(u)) * sin(v);

auto z = r * sin(u);

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

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200427

[ほしいものリスト]
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2020年4月26日

Rising sun flag to 3D. openFrameworks

[ Video ]

[ About ]
Rising sun flag to 3D.

[ 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;

	vector<ofMesh> mesh_list;
	vector<ofMesh> frame_list;
	vector<glm::vec3> direction_list;
	vector<glm::vec3> noise_seed_list;
	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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofEasyCam cam;

vector<ofMesh> mesh_list;

vector<ofMesh> frame_list;

vector<glm::vec3> direction_list;

vector<glm::vec3> noise_seed_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

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

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

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

	if (ofGetFrameNum() % 12 == 0) {

		ofMesh mesh, frame;
		frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
		int r = ofRandom(3);
		switch (r) {
		case 0:
			mesh.addVertex(glm::vec3(10, 0, 0));
			mesh.addVertex(glm::vec3(-10, 0, 0));
			frame.addVertex(glm::vec3(10, 0, 0));
			frame.addVertex(glm::vec3(-10, 0, 0));
			break;
		case 1:
			mesh.addVertex(glm::vec3(0, 10, 0));
			mesh.addVertex(glm::vec3(0, -10, 0));
			frame.addVertex(glm::vec3(0, 10, 0));
			frame.addVertex(glm::vec3(0, -10, 0));
			break;
		case 2:
			mesh.addVertex(glm::vec3(0, 0, 10));
			mesh.addVertex(glm::vec3(0, 0, -10));
			frame.addVertex(glm::vec3(0, 0, 10));
			frame.addVertex(glm::vec3(0, 0, -10));
			break;
		}
		this->mesh_list.push_back(mesh);
		this->frame_list.push_back(frame);

		auto direction = glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1));
		direction = glm::normalize(direction) * 30;
		this->direction_list.push_back(direction);

		auto noise_seed = glm::vec3(glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000)));
		this->noise_seed_list.push_back(noise_seed);

		this->color_list.push_back(ofColor(239, 39, 39, 192));
	}

	for (int i = this->mesh_list.size() - 1; i > -1; i--) {

		auto angle_x = ofMap(ofNoise(this->noise_seed_list[i].x, ofGetFrameNum() * 0.01), 0, 1, -PI, PI);
		auto angle_y = ofMap(ofNoise(this->noise_seed_list[i].y, ofGetFrameNum() * 0.01), 0, 1, -PI, PI);
		auto angle_z = ofMap(ofNoise(this->noise_seed_list[i].z, ofGetFrameNum() * 0.01), 0, 1, -PI, PI);

		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));

		glm::vec3 rotate_direction = glm::vec4(this->direction_list[i], 0) * rotation_z * rotation_y * rotation_x;

		auto right = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 2);
		auto left = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 1);

		this->mesh_list[i].addVertex(right + rotate_direction);
		this->mesh_list[i].addVertex(left + rotate_direction);

		this->frame_list[i].addVertex(right + rotate_direction);
		this->frame_list[i].addVertex(left + rotate_direction);

		int index = this->mesh_list[i].getNumVertices() - 1;
		this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 2); this->mesh_list[i].addIndex(index - 3);
		this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 1); this->mesh_list[i].addIndex(index - 3);

		this->frame_list[i].addIndex(index); this->frame_list[i].addIndex(index - 2);
		this->frame_list[i].addIndex(index - 1); this->frame_list[i].addIndex(index - 3);

		auto num = this->mesh_list[i].getNumVertices();
		this->color_list[i] = num < 300 ? this->color_list[i] : ofColor(this->color_list[i], ofMap(num, 300, 450, 192, 0));
		if (num > 450) {

			this->mesh_list.erase(this->mesh_list.begin() + i);
			this->frame_list.erase(this->frame_list.begin() + i);
			this->direction_list.erase(this->direction_list.begin() + i);
			this->noise_seed_list.erase(this->noise_seed_list.begin() + i);
			this->color_list.erase(this->color_list.begin() + i);
		}
	}
}

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

	this->cam.begin();

	ofSetColor(239, 39, 39);
	ofDrawSphere(80);

	for (int i = 0; i < this->mesh_list.size(); i++) {

		ofSetColor(this->color_list[i]);
		this->mesh_list[i].draw();

		ofSetColor(239, 39, 39, this->color_list[i].a * 2);
		this->frame_list[i].drawWireframe();
	}

	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);

ofSetLineWidth(1.5);

ofEnableDepthTest();

}

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

void ofApp::update() {

if (ofGetFrameNum() % 12 == 0) {

ofMesh mesh, frame;

frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

int r = ofRandom(3);

switch (r) {

case 0:

mesh.addVertex(glm::vec3(10, 0, 0));

mesh.addVertex(glm::vec3(-10, 0, 0));

frame.addVertex(glm::vec3(10, 0, 0));

frame.addVertex(glm::vec3(-10, 0, 0));

break;

case 1:

mesh.addVertex(glm::vec3(0, 10, 0));

mesh.addVertex(glm::vec3(0, -10, 0));

frame.addVertex(glm::vec3(0, 10, 0));

frame.addVertex(glm::vec3(0, -10, 0));

break;

case 2:

mesh.addVertex(glm::vec3(0, 0, 10));

mesh.addVertex(glm::vec3(0, 0, -10));

frame.addVertex(glm::vec3(0, 0, 10));

frame.addVertex(glm::vec3(0, 0, -10));

break;

}

this->mesh_list.push_back(mesh);

this->frame_list.push_back(frame);

auto direction = glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1));

direction = glm::normalize(direction) * 30;

this->direction_list.push_back(direction);

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

this->noise_seed_list.push_back(noise_seed);

this->color_list.push_back(ofColor(239, 39, 39, 192));

}

for (int i = this->mesh_list.size() - 1; i > -1; i--) {

auto angle_x = ofMap(ofNoise(this->noise_seed_list[i].x, ofGetFrameNum() * 0.01), 0, 1, -PI, PI);

auto angle_y = ofMap(ofNoise(this->noise_seed_list[i].y, ofGetFrameNum() * 0.01), 0, 1, -PI, PI);

auto angle_z = ofMap(ofNoise(this->noise_seed_list[i].z, ofGetFrameNum() * 0.01), 0, 1, -PI, PI);

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));

glm::vec3 rotate_direction = glm::vec4(this->direction_list[i], 0) * rotation_z * rotation_y * rotation_x;

auto right = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 2);

auto left = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 1);

this->mesh_list[i].addVertex(right + rotate_direction);

this->mesh_list[i].addVertex(left + rotate_direction);

this->frame_list[i].addVertex(right + rotate_direction);

this->frame_list[i].addVertex(left + rotate_direction);

int index = this->mesh_list[i].getNumVertices() - 1;

this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 2); this->mesh_list[i].addIndex(index - 3);

this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 1); this->mesh_list[i].addIndex(index - 3);

this->frame_list[i].addIndex(index); this->frame_list[i].addIndex(index - 2);

this->frame_list[i].addIndex(index - 1); this->frame_list[i].addIndex(index - 3);

auto num = this->mesh_list[i].getNumVertices();

this->color_list[i] = num < 300 ? this->color_list[i] : ofColor(this->color_list[i], ofMap(num, 300, 450, 192, 0));

if (num > 450) {

this->mesh_list.erase(this->mesh_list.begin() + i);

this->frame_list.erase(this->frame_list.begin() + i);

this->direction_list.erase(this->direction_list.begin() + i);

this->noise_seed_list.erase(this->noise_seed_list.begin() + i);

this->color_list.erase(this->color_list.begin() + i);

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(239, 39, 39);

ofDrawSphere(80);

for (int i = 0; i < this->mesh_list.size(); i++) {

ofSetColor(this->color_list[i]);

this->mesh_list[i].draw();

ofSetColor(239, 39, 39, this->color_list[i].a * 2);

this->frame_list[i].drawWireframe();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200426

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