noise – ページ 143 – プログラミング de 落描き

2021年11月15日2021年11月15日

Gradation one-sixth torus. Draw by openFrameworks

[ Video ]

[ About ]
欠けているトーラスをグラデーションで色付けする。

Color the missing torus with a gradient.

[ 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;
};

#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;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetColor(255);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	int count = 0;
	for (int x = -300; x <= 300; x += 600) {

		for (int y = -300; y <= 300; y += 600) {

			ofPushMatrix();
			ofTranslate(x, y, 0);
			ofRotateY(count++ * 45 + ofGetFrameNum());

			for (int r = 60; r <= 90; r += 30) {

				int v_span = 1;
				int u_span = 60;

				ofMesh face, line;
				line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
				for (int v = 0; v <= 360; v += v_span) {

					bool flag = true;
					int u_start = ofMap(ofNoise(r * cos(v * DEG_TO_RAD)  * 0.008, r * sin(v * DEG_TO_RAD) * 0.008, ofGetFrameNum() * 0.0035), 0, 1, -360, 360);
					int next_u = ofMap(ofNoise(r * cos((v + v_span) * DEG_TO_RAD) * 0.008, r * sin((v + v_span) * DEG_TO_RAD) * 0.008, ofGetFrameNum() * 0.0035), 0, 1, -360, 360);
					for (int u = u_start; u < u_start + 360; u += u_span) {

						if (flag) {

							face.addVertex(this->make_point(200, r, u, v));
							face.addVertex(this->make_point(200, r, u + u_span, v));
							face.addVertex(this->make_point(200, r, next_u + u_span, v + v_span));
							face.addVertex(this->make_point(200, r, next_u, v + v_span));

							line.addVertex(this->make_point(200, r, u, v));
							line.addVertex(this->make_point(200, r, u + u_span, v));
							line.addVertex(this->make_point(200, r, next_u + u_span, v + v_span));
							line.addVertex(this->make_point(200, r, next_u, v + v_span));

							ofColor color;
							auto hue = (count * 64 + r * 4 + (int)ofMap(v, 0, 360, 0, 255)) % 255;
							color.setHsb(hue, 180, 255);

							face.addColor(color);
							face.addColor(color);
							face.addColor(color);
							face.addColor(color);

							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);

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

						next_u += u_span;
						flag = !flag;
					}
				}

				face.drawFaces();
				line.drawWireframe();
			}

			ofPopMatrix();
		}
	}

	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(255);

ofSetColor(255);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

int count = 0;

for (int x = -300; x <= 300; x += 600) {

for (int y = -300; y <= 300; y += 600) {

ofPushMatrix();

ofTranslate(x, y, 0);

ofRotateY(count++ * 45 + ofGetFrameNum());

for (int r = 60; r <= 90; r += 30) {

int v_span = 1;

int u_span = 60;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

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

bool flag = true;

int u_start = ofMap(ofNoise(r * cos(v * DEG_TO_RAD) * 0.008, r * sin(v * DEG_TO_RAD) * 0.008, ofGetFrameNum() * 0.0035), 0, 1, -360, 360);

int next_u = ofMap(ofNoise(r * cos((v + v_span) * DEG_TO_RAD) * 0.008, r * sin((v + v_span) * DEG_TO_RAD) * 0.008, ofGetFrameNum() * 0.0035), 0, 1, -360, 360);

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

if (flag) {

face.addVertex(this->make_point(200, r, u, v));

face.addVertex(this->make_point(200, r, u + u_span, v));

face.addVertex(this->make_point(200, r, next_u + u_span, v + v_span));

face.addVertex(this->make_point(200, r, next_u, v + v_span));

line.addVertex(this->make_point(200, r, u, v));

line.addVertex(this->make_point(200, r, u + u_span, v));

line.addVertex(this->make_point(200, r, next_u + u_span, v + v_span));

line.addVertex(this->make_point(200, r, next_u, v + v_span));

ofColor color;

auto hue = (count * 64 + r * 4 + (int)ofMap(v, 0, 360, 0, 255)) % 255;

color.setHsb(hue, 180, 255);

face.addColor(color);

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);

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

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

}

next_u += u_span;

flag = !flag;

}

face.drawFaces();

line.drawWireframe();

}

ofPopMatrix();

}

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/Insta20211115

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2021年11月14日

Target was pointed. Draw by openFrameworks

[ Video ]

[ About ]
ターゲットを指さす矢印。

An arrow pointing to the target.

[ 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) {};

	void draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor color);
};

#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) {};

void draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor color);

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetColor(0);
	ofSetLineWidth(2);
}

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

	ofSeedRandom(39);
}

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

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

	auto target = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0125), 0, 1, -250, 250), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0125), 0, 1, -250, 250));
	ofDrawCircle(target, 10);

	for (int deg = 0; deg < 360; deg += 18) {

		int x = 300 * cos(deg * DEG_TO_RAD);
		int y = 300 * sin(deg * DEG_TO_RAD);
		this->draw_arrow(glm::vec2(x, y), target, 18, ofColor(39));
	}
}

//--------------------------------------------------------------
void ofApp::draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor color) {

	auto angle = std::atan2(target.y - location.y, target.x - location.x);
	auto translate_location = target - glm::vec2(size * 3 * cos(angle), size * 3 * sin(angle));
	auto distance = glm::distance(translate_location, location);

	ofPushMatrix();
	ofTranslate(translate_location);

	ofSetColor(color);
	ofFill();
	ofBeginShape();
	ofVertex(glm::vec2(size * cos(angle), size * sin(angle)));
	ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)));
	ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)));
	ofEndShape();

	ofBeginShape();
	ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)) * 0.25);
	ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(distance * cos(angle), distance * sin(angle)));
	ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(distance * cos(angle), distance * sin(angle)));
	ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)) * 0.25);

	ofEndShape();

	ofPopMatrix();

	ofDrawCircle(location, 5);
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetColor(0);

ofSetLineWidth(2);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

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

auto target = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0125), 0, 1, -250, 250), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0125), 0, 1, -250, 250));

ofDrawCircle(target, 10);

for (int deg = 0; deg < 360; deg += 18) {

int x = 300 * cos(deg * DEG_TO_RAD);

int y = 300 * sin(deg * DEG_TO_RAD);

this->draw_arrow(glm::vec2(x, y), target, 18, ofColor(39));

}

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

void ofApp::draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor color) {

auto angle = std::atan2(target.y - location.y, target.x - location.x);

auto translate_location = target - glm::vec2(size * 3 * cos(angle), size * 3 * sin(angle));

auto distance = glm::distance(translate_location, location);

ofPushMatrix();

ofTranslate(translate_location);

ofSetColor(color);

ofFill();

ofBeginShape();

ofVertex(glm::vec2(size * cos(angle), size * sin(angle)));

ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)));

ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)));

ofEndShape();

ofBeginShape();

ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)) * 0.25);

ofVertex(glm::vec2(size * 0.25 * cos(angle + PI * 0.5), size * 0.25 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(distance * cos(angle), distance * sin(angle)));

ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(distance * cos(angle), distance * sin(angle)));

ofVertex(glm::vec2(size * 0.25 * cos(angle - PI * 0.5), size * 0.25 * sin(angle - PI * 0.5)) * 0.25);

ofEndShape();

ofPopMatrix();

ofDrawCircle(location, 5);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211114

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2021年11月13日

Mixing squares and circles. Draw by openFrameworks

[ Video ]

[ About ]
ノイズの値で四角形と円をミックスする。

Mix squares and circles with noise values.

[ 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;
};

#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;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetLineWidth(2);
	ofEnableDepthTest();
}

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

}

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

	this->cam.begin();

	int len = 100;
	int width = len * 0.15;

	for (int x = -len * 1.2; x <= len * 1.2; x += len * 1.2) {

		for (int y = -len * 1.2; y <= len * 1.2; y += len * 1.2) {

			ofPushMatrix();
			ofTranslate(x, y, 0);

			for (int z = -len; z <= len; z += width) {

				ofMesh mesh, frame;
				frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
				for (int param = 0; param <= 100; param++) {

					int deg = param * 3.6 - 135;
					auto noise_value = ofNoise(x + cos(deg * DEG_TO_RAD) * 0.15, y + sin(deg * DEG_TO_RAD) * 0.15, z * 0.005, ofGetFrameNum() * 0.008);

					vector<glm::vec3> vertices;
					if (noise_value > 0.5) {

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

						vertices.push_back(glm::vec3(len * 0.4 * cos(deg * DEG_TO_RAD), len * 0.4 * sin(deg * DEG_TO_RAD), z + width * 0.5));
						vertices.push_back(glm::vec3(len * 0.4 * cos(deg * DEG_TO_RAD), len * 0.4 * sin(deg * DEG_TO_RAD), z - width * 0.5));
					}

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

					int index = mesh.getNumVertices() - 1;
					if (param > 0) {

						mesh.addIndex(index); mesh.addIndex(index - 2); mesh.addIndex(index - 3);
						mesh.addIndex(index); mesh.addIndex(index - 1); mesh.addIndex(index - 3);

						frame.addIndex(index); frame.addIndex(index - 2);
						frame.addIndex(index - 1); frame.addIndex(index - 3);
					}
				}

				ofSetColor(0);
				mesh.draw();

				ofSetColor(255);
				frame.drawWireframe();
			}

			ofPopMatrix();
		}
	}

	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(0);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

int len = 100;

int width = len * 0.15;

for (int x = -len * 1.2; x <= len * 1.2; x += len * 1.2) {

for (int y = -len * 1.2; y <= len * 1.2; y += len * 1.2) {

ofPushMatrix();

ofTranslate(x, y, 0);

for (int z = -len; z <= len; z += width) {

ofMesh mesh, frame;

frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

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

int deg = param * 3.6 - 135;

auto noise_value = ofNoise(x + cos(deg * DEG_TO_RAD) * 0.15, y + sin(deg * DEG_TO_RAD) * 0.15, z * 0.005, ofGetFrameNum() * 0.008);

vector<glm::vec3> vertices;

if (noise_value > 0.5) {

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

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

}

else {

vertices.push_back(glm::vec3(len * 0.4 * cos(deg * DEG_TO_RAD), len * 0.4 * sin(deg * DEG_TO_RAD), z + width * 0.5));

vertices.push_back(glm::vec3(len * 0.4 * cos(deg * DEG_TO_RAD), len * 0.4 * sin(deg * DEG_TO_RAD), z - width * 0.5));

}

mesh.addVertices(vertices);

frame.addVertices(vertices);

int index = mesh.getNumVertices() - 1;

if (param > 0) {

mesh.addIndex(index); mesh.addIndex(index - 2); mesh.addIndex(index - 3);

mesh.addIndex(index); mesh.addIndex(index - 1); mesh.addIndex(index - 3);

frame.addIndex(index); frame.addIndex(index - 2);

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

}

ofSetColor(0);

mesh.draw();

ofSetColor(255);

frame.drawWireframe();

}

ofPopMatrix();

}

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/Insta20211113

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