programming – ページ 134 – プログラミング de 落描き

2022年8月3日

Pendulum of circle. Draw by openFrameworks

[ Video ]

[ About ]
円の振り子。

[ 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;
	glm::vec3 noise_seed;
};

#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;

glm::vec3 noise_seed;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	ofBackground(255);
	ofSetLineWidth(2);
	ofEnableDepthTest();

	this->noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	float R = 250;
	float r = 50;
	float u_span = 10;

	ofMesh face, line;
	line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

	int x = 0;
	int y = 0;

	for (int r = 50; r > 10; r -= 2) {

		int v_start = ofMap(sin(r * 0.05 - ofGetFrameNum() * 0.035), -1, 1, -200, 20);
		int v_end = v_start + 3;
		int v_span = 1;

		for (int v = v_start; v <= v_end; v += v_span) {

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

				face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v - v_span * 0.5));
				face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v - v_span * 0.5));
				face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v + v_span * 0.5));
				face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v + v_span * 0.5));

				line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v - v_span * 0.5));
				line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v - v_span * 0.5));
				line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v + v_span * 0.5));
				line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v + v_span * 0.5));

				for (int i = 0; i < 4; i++) {

					face.addColor(ofColor(0));
					line.addColor(ofColor(255, 0, 0));
				}

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

				if (v == v_start) {

					line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 4);
				}

				if (v == v_end) {

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

	face.draw();
	line.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(30);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetLineWidth(2);

ofEnableDepthTest();

this->noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

float R = 250;

float r = 50;

float u_span = 10;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

int x = 0;

int y = 0;

for (int r = 50; r > 10; r -= 2) {

int v_start = ofMap(sin(r * 0.05 - ofGetFrameNum() * 0.035), -1, 1, -200, 20);

int v_end = v_start + 3;

int v_span = 1;

for (int v = v_start; v <= v_end; v += v_span) {

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

face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v - v_span * 0.5));

face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v - v_span * 0.5));

face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v + v_span * 0.5));

face.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v + v_span * 0.5));

line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v - v_span * 0.5));

line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v - v_span * 0.5));

line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u + u_span * 0.5, v + v_span * 0.5));

line.addVertex(glm::vec3(x, y, 0) + this->make_point(R, r, u - u_span * 0.5, v + v_span * 0.5));

for (int i = 0; i < 4; i++) {

face.addColor(ofColor(0));

line.addColor(ofColor(255, 0, 0));

}

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

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

if (v == v_start) {

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

}

if (v == v_end) {

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

}

face.draw();

line.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/Insta20220803

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2022年8月2日

Twist box. Draw by openFrameworks

[ Video ]

[ About ]
ねじり箱。

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	ofEasyCam cam;
	ofMesh 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) {};

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

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

	int span = 10;
	float threshold = 0.5;
	float frame_param = ofGetFrameNum() * 0.05;
	float coordinate_param = 0.0065;
	int len = 300;
	ofColor line_color(255);

	int z = len + span * 0.5;

	float angle;
	glm::highp_mat4 rotation, twist;
	for (int i = 0; i <= 6; i++) {

		for (int x = -len; x <= len; x += span) {

			for (int y = -len; y <= len; y += span) {

				if (i <= 4) {

					angle = PI * 0.5 * i;
					rotation = glm::rotate(glm::mat4(), angle, glm::vec3(0, 1, 0));
				}

				if (i == 5) {

					angle = PI * 0.5;
					rotation = glm::rotate(glm::mat4(), angle, glm::vec3(1, 0, 0));
				}

				if (i == 6) {

					angle = PI * 0.5 * 3;
					rotation = glm::rotate(glm::mat4(), angle, glm::vec3(1, 0, 0));
				}

				auto index = this->face.getNumVertices();
				vector<glm::vec3> vertices;

				vertices.push_back(glm::vec4(x - span * 0.5, y - span * 0.5, z, 0) * rotation);
				vertices.push_back(glm::vec4(x + span * 0.5, y - span * 0.5, z, 0) * rotation);
				vertices.push_back(glm::vec4(x + span * 0.5, y + span * 0.5, z, 0) * rotation);
				vertices.push_back(glm::vec4(x - span * 0.5, y + span * 0.5, z, 0) * rotation);

				for (auto& vertex : vertices) {

					auto noise_value = ofNoise(vertex.y * 0.0005 + ofGetFrameNum() * 0.02);
					if (noise_value < 0.43)	{

						noise_value = ofMap(noise_value, 0, 0.43, -1, 0);
					}
					else if (noise_value > 0.57) { 

						noise_value = ofMap(noise_value, 0.57, 1, 0, 1);
					}
					else {

						noise_value = 0;
					}
					auto twist_rad = ofMap(noise_value, -1, 1, PI * -4, PI * 4);
					twist = glm::rotate(glm::mat4(), twist_rad, glm::vec3(0, 1, 0));


					vertex = glm::vec4(vertex, 0) * twist;
				}

				this->face.addVertices(vertices);

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

				if (x == -len) {

					this->frame.addVertex(vertices[0]);
					this->frame.addVertex(vertices[3]);

					this->frame.addColor(line_color);
					this->frame.addColor(line_color);

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

				if (y == len) {

					this->frame.addVertex(vertices[2]);
					this->frame.addVertex(vertices[3]);

					this->frame.addColor(line_color);
					this->frame.addColor(line_color);

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

				if (x == len) {

					this->frame.addVertex(vertices[1]);
					this->frame.addVertex(vertices[2]);

					this->frame.addColor(line_color);
					this->frame.addColor(line_color);

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

				if (y == -len) {

					this->frame.addVertex(vertices[0]);
					this->frame.addVertex(vertices[1]);

					this->frame.addColor(line_color);
					this->frame.addColor(line_color);

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

				}
			}
		}
	}
}

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

	this->cam.begin();
	//ofRotateY(ofGetFrameNum());

	this->frame.draw();

	ofSetColor(0);
	this->face.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(30);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofSetLineWidth(1.5);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

int span = 10;

float threshold = 0.5;

float frame_param = ofGetFrameNum() * 0.05;

float coordinate_param = 0.0065;

int len = 300;

ofColor line_color(255);

int z = len + span * 0.5;

float angle;

glm::highp_mat4 rotation, twist;

for (int i = 0; i <= 6; i++) {

for (int x = -len; x <= len; x += span) {

for (int y = -len; y <= len; y += span) {

if (i <= 4) {

angle = PI * 0.5 * i;

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

}

if (i == 5) {

angle = PI * 0.5;

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

}

if (i == 6) {

angle = PI * 0.5 * 3;

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

}

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec4(x - span * 0.5, y - span * 0.5, z, 0) * rotation);

vertices.push_back(glm::vec4(x + span * 0.5, y - span * 0.5, z, 0) * rotation);

vertices.push_back(glm::vec4(x + span * 0.5, y + span * 0.5, z, 0) * rotation);

vertices.push_back(glm::vec4(x - span * 0.5, y + span * 0.5, z, 0) * rotation);

for (auto& vertex : vertices) {

auto noise_value = ofNoise(vertex.y * 0.0005 + ofGetFrameNum() * 0.02);

if (noise_value < 0.43) {

noise_value = ofMap(noise_value, 0, 0.43, -1, 0);

}

else if (noise_value > 0.57) {

noise_value = ofMap(noise_value, 0.57, 1, 0, 1);

}

else {

noise_value = 0;

}

auto twist_rad = ofMap(noise_value, -1, 1, PI * -4, PI * 4);

twist = glm::rotate(glm::mat4(), twist_rad, glm::vec3(0, 1, 0));

vertex = glm::vec4(vertex, 0) * twist;

}

this->face.addVertices(vertices);

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

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

if (x == -len) {

this->frame.addVertex(vertices[0]);

this->frame.addVertex(vertices[3]);

this->frame.addColor(line_color);

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

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

}

if (y == len) {

this->frame.addVertex(vertices[2]);

this->frame.addVertex(vertices[3]);

this->frame.addColor(line_color);

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

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

}

if (x == len) {

this->frame.addVertex(vertices[1]);

this->frame.addVertex(vertices[2]);

this->frame.addColor(line_color);

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

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

}

if (y == -len) {

this->frame.addVertex(vertices[0]);

this->frame.addVertex(vertices[1]);

this->frame.addColor(line_color);

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

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

}

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

void ofApp::draw() {

this->cam.begin();

//ofRotateY(ofGetFrameNum());

this->frame.draw();

ofSetColor(0);

this->face.draw();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220802

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2022年8月1日

Connect circles. Draw by openFrameworks

[ Video ]

[ About ]
円をつなぐ。

[ 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) {};
};

#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) {};

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetColor(200);
	ofNoFill();
	ofSetCircleResolution(60);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
}

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

	ofSeedRandom(39);
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	auto span = 10;
	for (auto radius = 150; radius <= 450; radius += 50) {

		auto small_radius = (radius * 2 * 3.14) / 360 * span;
		for (auto deg = 0; deg < 360; deg += span * 1.5) {

			auto base_location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
			ofNoFill();
			ofDrawCircle(base_location, 10);
			ofFill();
			ofDrawCircle(base_location, 5);

			ofSeedRandom(39);
			for (auto i = 0; i < 3; i++) {

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

				auto noise_radius = ofMap(ofNoise(noise_seed.x, base_location.x * 0.05, ofGetFrameNum() * 0.005), 0, 1, 0, small_radius);
				auto noise_deg = ofMap(ofNoise(noise_seed.y, base_location.y * 0.05, ofGetFrameNum() * 0.005), 0, 1, -360, 360);

				auto noise_location = glm::vec2(noise_radius * cos(noise_deg * DEG_TO_RAD), noise_radius * sin(noise_deg * DEG_TO_RAD));

				ofNoFill();
				ofDrawCircle(base_location + noise_location, 5);
				ofFill();
				ofDrawCircle(base_location + noise_location, 2);
				ofDrawLine(base_location, base_location + noise_location);
			}
		}
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofSetColor(200);

ofNoFill();

ofSetCircleResolution(60);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

auto span = 10;

for (auto radius = 150; radius <= 450; radius += 50) {

auto small_radius = (radius * 2 * 3.14) / 360 * span;

for (auto deg = 0; deg < 360; deg += span * 1.5) {

auto base_location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

ofNoFill();

ofDrawCircle(base_location, 10);

ofFill();

ofDrawCircle(base_location, 5);

ofSeedRandom(39);

for (auto i = 0; i < 3; i++) {

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

auto noise_radius = ofMap(ofNoise(noise_seed.x, base_location.x * 0.05, ofGetFrameNum() * 0.005), 0, 1, 0, small_radius);

auto noise_deg = ofMap(ofNoise(noise_seed.y, base_location.y * 0.05, ofGetFrameNum() * 0.005), 0, 1, -360, 360);

auto noise_location = glm::vec2(noise_radius * cos(noise_deg * DEG_TO_RAD), noise_radius * sin(noise_deg * DEG_TO_RAD));

ofNoFill();

ofDrawCircle(base_location + noise_location, 5);

ofFill();

ofDrawCircle(base_location + noise_location, 2);

ofDrawLine(base_location, base_location + noise_location);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220801

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