openFrameworks – ページ 371 – プログラミング de 落描き

2022年2月8日2022年2月8日

Beautiful circle. Draw by openframeworks

[ Video ]

[ About ]

近いと線を引く。

Draw a line if it’s close.

[ 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) {};

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

	ofEasyCam cam;
	ofMesh mesh;
	vector<float> noise_seed_list;
	vector<float> noise_param_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 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) {};

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

ofEasyCam cam;

ofMesh mesh;

vector<float> noise_seed_list;

vector<float> noise_param_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
	
	this->mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

	ofColor color;
	for (int i = 0; i < 16; i++) {

		this->noise_seed_list.push_back(ofRandom(1000));
		this->noise_param_list.push_back(0);

		color.setHsb(ofMap(i, 0, 16, 0, 255), 255, 255);
		this->color_list.push_back(color);
	}
}

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

	this->mesh.clear();

	int radius = 320;
	int span = 28;

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

		for (int deg = 0; deg < 360; deg += 2) {

			auto noise_location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
			auto noise_deg = ofMap(ofNoise(this->noise_seed_list[i], noise_location.x * 0.0025, noise_location.y * 0.0025, this->noise_param_list[i]), 0, 1, -180, 180);

			auto loc = this->make_point(radius, radius * 0.3, noise_deg, deg);
			loc.z = 0;

			this->mesh.addVertex(loc);
			this->mesh.addColor(ofColor(this->color_list[i], 0));
		}

		this->noise_param_list[i] += 0.008;
	}

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

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

			auto distance = glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k));
			if (distance < span) {

				auto alpha = distance < span * 0.25 ? 255 : ofMap(distance, span * 0.25, span, 255, 0);

				if (this->mesh.getColor(i).a < alpha) {

					this->mesh.setColor(i, ofColor(this->mesh.getColor(i), alpha));
				}

				if (this->mesh.getColor(k).a < alpha) {

					this->mesh.setColor(k, ofColor(this->mesh.getColor(k), alpha));
				}

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

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

	this->cam.begin();

	this->mesh.drawWireframe();

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

		ofSetColor(this->mesh.getColor(i));
		ofDrawSphere(this->mesh.getVertex(i), 1.85);
	}

	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(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

ofColor color;

for (int i = 0; i < 16; i++) {

this->noise_seed_list.push_back(ofRandom(1000));

this->noise_param_list.push_back(0);

color.setHsb(ofMap(i, 0, 16, 0, 255), 255, 255);

this->color_list.push_back(color);

}

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

void ofApp::update() {

this->mesh.clear();

int radius = 320;

int span = 28;

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

for (int deg = 0; deg < 360; deg += 2) {

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

auto noise_deg = ofMap(ofNoise(this->noise_seed_list[i], noise_location.x * 0.0025, noise_location.y * 0.0025, this->noise_param_list[i]), 0, 1, -180, 180);

auto loc = this->make_point(radius, radius * 0.3, noise_deg, deg);

loc.z = 0;

this->mesh.addVertex(loc);

this->mesh.addColor(ofColor(this->color_list[i], 0));

}

this->noise_param_list[i] += 0.008;

}

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

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

auto distance = glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k));

if (distance < span) {

auto alpha = distance < span * 0.25 ? 255 : ofMap(distance, span * 0.25, span, 255, 0);

if (this->mesh.getColor(i).a < alpha) {

this->mesh.setColor(i, ofColor(this->mesh.getColor(i), alpha));

}

if (this->mesh.getColor(k).a < alpha) {

this->mesh.setColor(k, ofColor(this->mesh.getColor(k), alpha));

}

this->mesh.addIndex(i);

this->mesh.addIndex(k);

}

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

void ofApp::draw() {

this->cam.begin();

this->mesh.drawWireframe();

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

ofSetColor(this->mesh.getColor(i));

ofDrawSphere(this->mesh.getVertex(i), 1.85);

}

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/Insta20220208

2022年2月7日2022年2月7日

Circle <-> Rect. Draw by openFrameworks

[ Video ]

[ About ]
円と正方形を行ったり来たり。

Back and forth between circles and squares.

[ 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(30);
	ofSetWindowTitle("openframeworks");

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

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

}

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

	this->cam.begin();

	int len = 120;
	int width = len * 0.15;

	for (int x = -len * 5; x <= len * 5; x += len) {

		for (int y = -len * 5; y <= len * 5; y += len) {

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

			ofMesh 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 * 0.035 + cos(deg * DEG_TO_RAD) * 0.15, y * 0.035 + sin(deg * DEG_TO_RAD) * 0.15, ofGetFrameNum() * 0.015);

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

					vertices.push_back(glm::vec3(this->make_point(len, param), width * 0.5));
					vertices.push_back(glm::vec3(this->make_point(len, param),  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), width * 0.5));
					vertices.push_back(glm::vec3(len * 0.4 * cos(deg * DEG_TO_RAD), len * 0.4 * sin(deg * DEG_TO_RAD), width * 0.5));
				}

				frame.addVertices(vertices);

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

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

			ofSetColor(0);
			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());
}

100

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

int len = 120;

int width = len * 0.15;

for (int x = -len * 5; x <= len * 5; x += len) {

for (int y = -len * 5; y <= len * 5; y += len) {

ofPushMatrix();

ofTranslate(x, y, 0);

ofMesh 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 * 0.035 + cos(deg * DEG_TO_RAD) * 0.15, y * 0.035 + sin(deg * DEG_TO_RAD) * 0.15, ofGetFrameNum() * 0.015);

vector<glm::vec3> vertices;

if (noise_value > 0.5) {

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

}

frame.addVertices(vertices);

int index = frame.getNumVertices() - 1;

if (param > 0) {

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

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

}

ofSetColor(0);

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/Insta20220207

2022年2月6日

Gradation cards. Draw by openFrameworks

[ Video ]

[ About ]
トーラスの座標4か所で結んで四角を描く。

Draw a square by connecting it with the four coordinates of the torus.

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

ofEasyCam cam;

ofMesh face, line;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetLineWidth(3);
	ofEnableDepthTest();

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

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

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

	float R = 250;
	float r = R * 0.25;
	float v_step = 5;

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

		float u_start = ofMap(ofNoise(glm::vec3(cos(v * DEG_TO_RAD) * 0.85, sin(v * DEG_TO_RAD) * 0.85, ofGetFrameNum() * 0.01)), 0, 1, -360,360);
		ofColor face_color;
		float hue = ofMap(v, 0, 360, 0, 255);
		face_color.setHsb(hue, 130, 255);

		vector<glm::vec3> vertices;
		for (float u = u_start; u < u_start + 360; u += 90) {

			vertices.push_back(glm::vec3(this->make_point(R, r, u, v)));
		}

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

		for (int i = 0; i < vertices.size(); i++) {

			this->face.addColor(face_color);
			this->line.addColor(ofColor(255));
		}
	}
}

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

	this->cam.begin();

	ofRotateY(ofGetFrameNum() * 1.333333333333333333);

	this->line.drawWireframe();
	this->face.draw();

	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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofSetLineWidth(3);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

this->face.clear();

this->line.clear();

float R = 250;

float r = R * 0.25;

float v_step = 5;

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

float u_start = ofMap(ofNoise(glm::vec3(cos(v * DEG_TO_RAD) * 0.85, sin(v * DEG_TO_RAD) * 0.85, ofGetFrameNum() * 0.01)), 0, 1, -360,360);

ofColor face_color;

float hue = ofMap(v, 0, 360, 0, 255);

face_color.setHsb(hue, 130, 255);

vector<glm::vec3> vertices;

for (float u = u_start; u < u_start + 360; u += 90) {

vertices.push_back(glm::vec3(this->make_point(R, r, u, v)));

}

this->face.addVertices(vertices);

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

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

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

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

for (int i = 0; i < vertices.size(); i++) {

this->face.addColor(face_color);

this->line.addColor(ofColor(255));

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 1.333333333333333333);

this->line.drawWireframe();

this->face.draw();

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/Insta20220206

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