openFrameworks – ページ 365 – プログラミング de 落描き

2022年9月20日

Red – Blue. Draw by openFrameworks

[ Video ]

[ About ]
赤～青。

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

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

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	int v_span = 8;
	int u_span = 30;
	int R = 200;
	int r = 60;

	ofMesh face, line;
	line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	
	int u_start = ofGetFrameNum() * 3.33333;
	for (int v = 0; v < 360; v += v_span) {

		u_start += v_span;
		for (int u = u_start; u < u_start + 270; u += u_span) {

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

			line.addVertex(this->make_point(R, r, u, v));
			line.addVertex(this->make_point(R, r, u + u_span, v));
			line.addVertex(this->make_point(R, r, u + u_span, v + v_span * 0.5));
			line.addVertex(this->make_point(R, r, u, v + v_span * 0.5));
						
			ofColor face_color;
			face_color.setHsb(ofMap(u - u_start, 0, 270, 180, 255), 255, 255);
			ofColor line_color = ofColor(255);

			face.addColor(face_color);
			face.addColor(face_color);
			face.addColor(face_color);
			face.addColor(face_color);

			line.addColor(line_color);
			line.addColor(line_color);
			line.addColor(line_color);
			line.addColor(line_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);

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

		}
	}

	face.drawFaces();
	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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetLineWidth(3);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

int v_span = 8;

int u_span = 30;

int R = 200;

int r = 60;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

int u_start = ofGetFrameNum() * 3.33333;

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

u_start += v_span;

for (int u = u_start; u < u_start + 270; u += u_span) {

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

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

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

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

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

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

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

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

ofColor face_color;

face_color.setHsb(ofMap(u - u_start, 0, 270, 180, 255), 255, 255);

ofColor line_color = ofColor(255);

face.addColor(face_color);

line.addColor(line_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);

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

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

}

face.drawFaces();

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/Insta20220920

2022年9月19日

Noise river. Draw by openFrameworks

[ Video ]

[ About ]
ノイズ川。

[ 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) {};
};

#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) {};

};

#include "ofApp.h"

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

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

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

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

	ofSeedRandom(39);
}

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

	int span = 30;
	int radius = span * 0.25;
	for (int x = span * 0.5; x <= ofGetWindowWidth(); x += span) {

		for (int y = span * 0.5; y <= ofGetWindowHeight(); y += span) {

			ofPushMatrix();
			ofTranslate(x, y);

			auto noise_y = ofMap(ofNoise(x * 0.0035 + ofGetFrameNum() * 0.03), 0, 1, 100, ofGetWindowHeight() - 100);

			if (abs(noise_y - y) < 100) {

				auto y_1 = ofMap(ofNoise((x - span * 0.5) * 0.0035 + ofGetFrameNum() * 0.03), 0, 1, 100, ofGetWindowHeight() - 100);
				auto y_2 = ofMap(ofNoise((x + span * 0.5) * 0.0035 + ofGetFrameNum() * 0.03), 0, 1, 100, ofGetWindowHeight() - 100);

				auto rad = std::atan2(y_1 - y_2, (x - span * 0.5) - (x + span * 0.5));

				ofRotate(rad * RAD_TO_DEG);

				ofSetColor(255);
				ofDrawCircle(0, 0, radius);
				ofDrawLine(span * -0.45, 0, span * 0.45, 0);
			}
			else {

				ofSetColor(128);
				ofDrawCircle(0, 0, radius);
				ofDrawLine(span * -0.45, 0, span * 0.45, 0);
			}

			ofPopMatrix();
		}
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofNoFill();

ofSetLineWidth(2);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

int span = 30;

int radius = span * 0.25;

for (int x = span * 0.5; x <= ofGetWindowWidth(); x += span) {

for (int y = span * 0.5; y <= ofGetWindowHeight(); y += span) {

ofPushMatrix();

ofTranslate(x, y);

auto noise_y = ofMap(ofNoise(x * 0.0035 + ofGetFrameNum() * 0.03), 0, 1, 100, ofGetWindowHeight() - 100);

if (abs(noise_y - y) < 100) {

auto y_1 = ofMap(ofNoise((x - span * 0.5) * 0.0035 + ofGetFrameNum() * 0.03), 0, 1, 100, ofGetWindowHeight() - 100);

auto y_2 = ofMap(ofNoise((x + span * 0.5) * 0.0035 + ofGetFrameNum() * 0.03), 0, 1, 100, ofGetWindowHeight() - 100);

auto rad = std::atan2(y_1 - y_2, (x - span * 0.5) - (x + span * 0.5));

ofRotate(rad * RAD_TO_DEG);

ofSetColor(255);

ofDrawCircle(0, 0, radius);

ofDrawLine(span * -0.45, 0, span * 0.45, 0);

}

else {

ofSetColor(128);

ofDrawCircle(0, 0, radius);

ofDrawLine(span * -0.45, 0, span * 0.45, 0);

}

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220919

2022年9月18日

sin x cos. Draw by openFrameworks

[ Video ]

[ About ]
sin波 x cos波。

[ 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) {};

	ofMesh mesh;
};

#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) {};

ofMesh mesh;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetLineWidth(1.5);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

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

	ofSeedRandom(39);
}

//--------------------------------------------------------------
void ofApp::draw() {
	
	ofTranslate(0, ofGetWindowHeight() * 0.5);

	int span = 5;
	ofColor color;

	ofMesh line;
	line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	
	for (int base_y = -150; base_y <= 150; base_y += 300) {

		for (int hue = 0; hue <= 256; hue += 16) {

			color.setHsb(hue, 255, 255);
			auto scale = 0.02;

			for (int start_x = 30; start_x < ofGetWindowWidth(); start_x += 120) {

				for (int x = start_x; x < start_x + 90; x += span) {

					auto y = start_x % 120 == 30 ?
						base_y + ofMap(sin((hue + x) * scale + ofGetFrameNum() * 0.05), -1, 1, -80, 80) :
						base_y + ofMap(cos((hue + x) * scale + ofGetFrameNum() * 0.05), -1, 1, -80, 80);
					line.addVertex(glm::vec3(x, y, 0));
					line.addColor(color);

					if (x > start_x) {

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

						ofSetColor(color);
						ofDrawCircle(line.getVertex(line.getNumVertices() - 1), 2);
					}
				}

				ofSetColor(color);
				ofDrawCircle(line.getVertex(line.getNumVertices() - 1), 2);
			}
		}
	}

	line.drawVertices();
	line.drawWireframe();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetLineWidth(1.5);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

ofTranslate(0, ofGetWindowHeight() * 0.5);

int span = 5;

ofColor color;

ofMesh line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

for (int base_y = -150; base_y <= 150; base_y += 300) {

for (int hue = 0; hue <= 256; hue += 16) {

color.setHsb(hue, 255, 255);

auto scale = 0.02;

for (int start_x = 30; start_x < ofGetWindowWidth(); start_x += 120) {

for (int x = start_x; x < start_x + 90; x += span) {

auto y = start_x % 120 == 30 ?

base_y + ofMap(sin((hue + x) * scale + ofGetFrameNum() * 0.05), -1, 1, -80, 80) :

base_y + ofMap(cos((hue + x) * scale + ofGetFrameNum() * 0.05), -1, 1, -80, 80);

line.addVertex(glm::vec3(x, y, 0));

line.addColor(color);

if (x > start_x) {

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

}

else {

ofSetColor(color);

ofDrawCircle(line.getVertex(line.getNumVertices() - 1), 2);

}

ofSetColor(color);

ofDrawCircle(line.getVertex(line.getNumVertices() - 1), 2);

}

line.drawVertices();

line.drawWireframe();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220918

2025年9月
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