openFrameworks – ページ 314 – 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());
}

100

101

102

103

104

105

#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

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());
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

#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

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

2025年2月
月	火	水	木	金	土	日
					1	2
3	4	5	6	7	8	9
10	11	12	13	14	15	16
17	18	19	20	21	22	23
24	25	26	27	28