junkiyoshi – ページ 137 – プログラミング de 落描き

2023年3月24日2023年3月24日

Rampaging torus. Draw by openFrameworks

[ video ]

[ About ]
暴れトーラス。

[ 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(0);
	ofSetLineWidth(3);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 2);

	int v_span = 8;
	int u_span = 90;
	int R = 200;

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

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

		int u_start = ofMap(ofNoise(cos(v * DEG_TO_RAD) * 0.25, sin(v * DEG_TO_RAD) * 0.25, ofGetFrameNum() * 0.015), 0, 1, -360, 360);
		int next_u = u_start + u_span;
		int r = ofMap(ofNoise(glm::vec4(this->make_point(R, 30, u_start, v) * 0.01, ofGetFrameNum() * 0.025)), 0, 1, 0, 150);
		for (int u = u_start; u < u_start + 360; 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, next_u + u_span, v + v_span * 0.8));
			face.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

			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, next_u + u_span, v + v_span * 0.8));
			line.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

			ofColor face_color = ofColor(0);
			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() - 2);
			line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 4);

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

			next_u += u_span;

		}
	}

	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

102

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofSetLineWidth(3);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 2);

int v_span = 8;

int u_span = 90;

int R = 200;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

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

int u_start = ofMap(ofNoise(cos(v * DEG_TO_RAD) * 0.25, sin(v * DEG_TO_RAD) * 0.25, ofGetFrameNum() * 0.015), 0, 1, -360, 360);

int next_u = u_start + u_span;

int r = ofMap(ofNoise(glm::vec4(this->make_point(R, 30, u_start, v) * 0.01, ofGetFrameNum() * 0.025)), 0, 1, 0, 150);

for (int u = u_start; u < u_start + 360; 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, next_u + u_span, v + v_span * 0.8));

face.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

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, next_u + u_span, v + v_span * 0.8));

line.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

ofColor face_color = ofColor(0);

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() - 2);

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

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

next_u += u_span;

}

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/Insta20230324

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2023年3月23日

3 color ameba. draw by openFrameworks

[ Video ]

[ About ]
3色アメーバ。

[ Source ]

#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) {};

	vector<ofMesh> mesh_list;
};

#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) {};

vector<ofMesh> mesh_list;

};

#include "ofApp.h"

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

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

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

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

		ofMesh mesh;
		this->mesh_list.push_back(mesh);
	}
}

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

	ofSeedRandom(39);

	int len = 580;
	int span = 1;
	ofColor color;

	int index = 0;
	for (auto& mesh : this->mesh_list) {

		mesh.clear();
		auto seed = ofRandom(1000);
		for (int x = len * -0.5; x < len * 0.5; x += span) {

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

				auto noise_value = ofMap(ofNoise(seed, x * 0.003, y * 0.003, ofGetFrameNum() * 0.01), 0, 1, 0, 10);
				if ((int)noise_value % 2 == 0) {

					continue;
				}

				mesh.addVertex(glm::vec3(x, y, 0));
				mesh.addVertex(glm::vec3(x + span, y, 0));
				mesh.addVertex(glm::vec3(x + span, y + span, 0));
				mesh.addVertex(glm::vec3(x, y + span, 0));

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

				noise_value = noise_value - (int)noise_value;
				color.setHsb(ofMap(index, 0, 3, 128, 255), 255, 255, ofMap(abs(noise_value - 0.5), 0, 0.5, 255, 0));
				for (int i = 0; i < 4; i++) {

					mesh.addColor(color);
				}
			}
		}

		index++;
	}
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	for (auto& mesh : this->mesh_list) {

		mesh.draw();
	}

	/*
	ostringstream os;
	os << setw(4) << setfill('0') << ofGetFrameNum() + 1;
	ofImage image;
	image.grabScreen(0, 0, ofGetWidth(), ofGetHeight());
	image.saveImage("image/img_" + os.str() + ".jpg");
	if (ofGetFrameNum() + 1 >= 24 * 20) {

		std::exit(1);
	}
	*/

	// > ffmpeg -i img_%04d.jpg -r 24 out.mp4
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

ofMesh mesh;

this->mesh_list.push_back(mesh);

}

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

void ofApp::update() {

ofSeedRandom(39);

int len = 580;

int span = 1;

ofColor color;

int index = 0;

for (auto& mesh : this->mesh_list) {

mesh.clear();

auto seed = ofRandom(1000);

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

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

auto noise_value = ofMap(ofNoise(seed, x * 0.003, y * 0.003, ofGetFrameNum() * 0.01), 0, 1, 0, 10);

if ((int)noise_value % 2 == 0) {

continue;

}

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

mesh.addVertex(glm::vec3(x + span, y, 0));

mesh.addVertex(glm::vec3(x + span, y + span, 0));

mesh.addVertex(glm::vec3(x, y + span, 0));

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

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

noise_value = noise_value - (int)noise_value;

color.setHsb(ofMap(index, 0, 3, 128, 255), 255, 255, ofMap(abs(noise_value - 0.5), 0, 0.5, 255, 0));

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

mesh.addColor(color);

}

index++;

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

for (auto& mesh : this->mesh_list) {

mesh.draw();

}

ostringstream os;

os << setw(4) << setfill('0') << ofGetFrameNum() + 1;

ofImage image;

image.grabScreen(0, 0, ofGetWidth(), ofGetHeight());

image.saveImage("image/img_" + os.str() + ".jpg");

if (ofGetFrameNum() + 1 >= 24 * 20) {

std::exit(1);

}

// > ffmpeg -i img_%04d.jpg -r 24 out.mp4

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230323

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2023年3月22日

Tilt the X-shape by 15 degrees. Draw by openFrameworks

[ Video ]

[ About ]
Xを15度傾ける

[ Source ]

#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 "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(30);
	ofSetWindowTitle("openFrameworks");

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

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

	ofSeedRandom(39);
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	for (int x = -300; x <= 300; x += 30) {

		for (int y = -300; y <= 300; y += 30) {

			ofPushMatrix();
			ofTranslate(x, y);
			ofRotate(15);

			auto noise_value = ofNoise(x * 0.005, y * 0.005, ofGetFrameNum() * 0.01);
			noise_value = noise_value < 0.45 ? 0.1 : ofMap(noise_value, 0.45, 1, 0.1, 1);
			auto radius = ofMap(noise_value, 0, 1, 0, 45);

			vector<glm::vec2> vertices;
			vertices.push_back(glm::vec2(radius * cos(45 * DEG_TO_RAD), radius * sin(45 * DEG_TO_RAD)));
			vertices.push_back(glm::vec2(radius * cos(225 * DEG_TO_RAD), radius * sin(225 * DEG_TO_RAD)));
			vertices.push_back(glm::vec2(radius * cos(135 * DEG_TO_RAD), radius * sin(135 * DEG_TO_RAD)));
			vertices.push_back(glm::vec2(radius * cos(315 * DEG_TO_RAD), radius * sin(315 * DEG_TO_RAD)));

			ofDrawLine(vertices[0], vertices[1]);
			ofDrawLine(vertices[2], vertices[3]);

			ofPopMatrix();
		}
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetColor(255);

ofSetLineWidth(2);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

for (int x = -300; x <= 300; x += 30) {

for (int y = -300; y <= 300; y += 30) {

ofPushMatrix();

ofTranslate(x, y);

ofRotate(15);

auto noise_value = ofNoise(x * 0.005, y * 0.005, ofGetFrameNum() * 0.01);

noise_value = noise_value < 0.45 ? 0.1 : ofMap(noise_value, 0.45, 1, 0.1, 1);

auto radius = ofMap(noise_value, 0, 1, 0, 45);

vector<glm::vec2> vertices;

vertices.push_back(glm::vec2(radius * cos(45 * DEG_TO_RAD), radius * sin(45 * DEG_TO_RAD)));

vertices.push_back(glm::vec2(radius * cos(225 * DEG_TO_RAD), radius * sin(225 * DEG_TO_RAD)));

vertices.push_back(glm::vec2(radius * cos(135 * DEG_TO_RAD), radius * sin(135 * DEG_TO_RAD)));

vertices.push_back(glm::vec2(radius * cos(315 * DEG_TO_RAD), radius * sin(315 * DEG_TO_RAD)));

ofDrawLine(vertices[0], vertices[1]);

ofDrawLine(vertices[2], vertices[3]);

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230322

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