プログラミング de 落描き – ページ 733 – クリエイティブ・コーディングによる生成物とソース

2019年12月23日

Line of noise. openFrameworks

[ Video ]

[ About ]
近い点同士をつなぐノイズ由来の線。

Line of noise.

[ 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(60);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);
	ofSetColor(39);

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

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

	ofSeedRandom(39);
	this->mesh.clear();

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

		auto noise_seed = ofRandom(1000);
		for (int x = 0; x <= ofGetWidth(); x += 3) {

			auto y = ofMap(ofNoise(noise_seed, x * 0.003, ofGetFrameNum() * 0.003), 0, 1, 0, ofGetHeight());
			this->mesh.addVertex(glm::vec3(x, y, 0));
	
			if (x > 0) {

				this->mesh.addIndex(this->mesh.getNumVertices() - 2);
				this->mesh.addIndex(this->mesh.getNumVertices() - 1);
			}
		}
	}

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

		for (int k = i + 2; k < this->mesh.getNumVertices(); k++) {

			if (glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k)) < 35) {

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

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

	this->mesh.drawWireframe();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetColor(39);

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->mesh.clear();

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

auto noise_seed = ofRandom(1000);

for (int x = 0; x <= ofGetWidth(); x += 3) {

auto y = ofMap(ofNoise(noise_seed, x * 0.003, ofGetFrameNum() * 0.003), 0, 1, 0, ofGetHeight());

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

if (x > 0) {

this->mesh.addIndex(this->mesh.getNumVertices() - 2);

this->mesh.addIndex(this->mesh.getNumVertices() - 1);

}

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

for (int k = i + 2; k < this->mesh.getNumVertices(); k++) {

if (glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k)) < 35) {

this->mesh.addIndex(i);

this->mesh.addIndex(k);

}

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

void ofApp::draw() {

this->mesh.drawWireframe();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20191223

2019年12月22日

Pillars. openFrameworks

[ Video ]

[ About ]
柱たち。

Pillars.

[ 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_mesh, frame_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) {};

ofEasyCam cam;

ofMesh face_mesh, frame_mesh;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

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

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

	this->face_mesh.clear();
	this->frame_mesh.clear();

	int radius_span = 10;
	int deg_span = 8;
	for (int radius = 100; radius < 300; radius += radius_span * 4) {

		for (int deg_start = 0; deg_start < 360; deg_start += deg_span) {

			auto noise_seed = glm::vec2((300 - radius) * cos(deg_start * DEG_TO_RAD), (300 - radius) * sin(deg_start * DEG_TO_RAD));
			auto noise_value = ofNoise(glm::vec3(noise_seed * 0.01, ofGetFrameNum() * 0.005));
			auto z = ofMap(noise_value, 0, 1, -radius, radius);
			int param_index = this->face_mesh.getNumVertices();
			for (int deg = deg_start; deg < deg_start + deg_span; deg++) {

				int index = this->face_mesh.getNumVertices();

				vector<glm::vec3> vertices;

				vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z));
				vertices.push_back(glm::vec3((radius + radius_span) * cos(deg * DEG_TO_RAD), (radius + radius_span) * sin(deg * DEG_TO_RAD), z));
				vertices.push_back(glm::vec3((radius + radius_span) * cos((deg + 1) * DEG_TO_RAD), (radius + radius_span) * sin((deg + 1) * DEG_TO_RAD), z));
				vertices.push_back(glm::vec3(radius * cos((deg + 1) * DEG_TO_RAD), radius * sin((deg + 1) * DEG_TO_RAD), z));

				vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0));
				vertices.push_back(glm::vec3((radius + radius_span) * cos(deg * DEG_TO_RAD), (radius + radius_span) * sin(deg * DEG_TO_RAD), 0));
				vertices.push_back(glm::vec3((radius + radius_span) * cos((deg + 1) * DEG_TO_RAD), (radius + radius_span) * sin((deg + 1) * DEG_TO_RAD), 0));
				vertices.push_back(glm::vec3(radius * cos((deg + 1) * DEG_TO_RAD), radius * sin((deg + 1) * DEG_TO_RAD), 0));

				this->face_mesh.addVertices(vertices);

				this->face_mesh.addIndex(index + 0);	this->face_mesh.addIndex(index + 1); this->face_mesh.addIndex(index + 2);
				this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 2); this->face_mesh.addIndex(index + 3);

				this->face_mesh.addIndex(index + 4);	this->face_mesh.addIndex(index + 5); this->face_mesh.addIndex(index + 6);
				this->face_mesh.addIndex(index + 4); this->face_mesh.addIndex(index + 6); this->face_mesh.addIndex(index + 7);

				this->face_mesh.addIndex(index + 0);	this->face_mesh.addIndex(index + 3); this->face_mesh.addIndex(index + 7);
				this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 4); this->face_mesh.addIndex(index + 7);

				this->face_mesh.addIndex(index + 1);	this->face_mesh.addIndex(index + 2); this->face_mesh.addIndex(index + 6);
				this->face_mesh.addIndex(index + 1);	this->face_mesh.addIndex(index + 5); this->face_mesh.addIndex(index + 6);

				this->frame_mesh.addVertices(vertices);

				this->frame_mesh.addIndex(index + 0); this->frame_mesh.addIndex(index + 3);
				this->frame_mesh.addIndex(index + 4); this->frame_mesh.addIndex(index + 7);

				this->frame_mesh.addIndex(index + 1); this->frame_mesh.addIndex(index + 2);
				this->frame_mesh.addIndex(index + 5); this->frame_mesh.addIndex(index + 6);
			}

			this->face_mesh.addIndex(param_index + 0); this->face_mesh.addIndex(param_index + 1); this->face_mesh.addIndex(param_index + 5);
			this->face_mesh.addIndex(param_index + 0); this->face_mesh.addIndex(param_index + 4); this->face_mesh.addIndex(param_index + 5);

			this->frame_mesh.addIndex(param_index + 0); this->frame_mesh.addIndex(param_index + 1);
			this->frame_mesh.addIndex(param_index + 4); this->frame_mesh.addIndex(param_index + 5);

			this->frame_mesh.addIndex(param_index + 0); this->frame_mesh.addIndex(param_index + 4);
			this->frame_mesh.addIndex(param_index + 1); this->frame_mesh.addIndex(param_index + 5);

			param_index = this->face_mesh.getNumVertices() - 8;

			this->face_mesh.addIndex(param_index + 2); this->face_mesh.addIndex(param_index + 3); this->face_mesh.addIndex(param_index + 6);
			this->face_mesh.addIndex(param_index + 3); this->face_mesh.addIndex(param_index + 6); this->face_mesh.addIndex(param_index + 7);

			this->frame_mesh.addIndex(param_index + 2); this->frame_mesh.addIndex(param_index + 3);
			this->frame_mesh.addIndex(param_index + 6); this->frame_mesh.addIndex(param_index + 7);

			this->frame_mesh.addIndex(param_index + 2); this->frame_mesh.addIndex(param_index + 6);
			this->frame_mesh.addIndex(param_index + 3); this->frame_mesh.addIndex(param_index + 7);
		}
	}
}

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

	this->cam.begin();
	ofRotateZ(ofGetFrameNum() * 0.5);

	ofSetColor(39);
	this->face_mesh.draw();

	ofSetColor(239);
	this->frame_mesh.drawWireframe();

	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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

this->face_mesh.clear();

this->frame_mesh.clear();

int radius_span = 10;

int deg_span = 8;

for (int radius = 100; radius < 300; radius += radius_span * 4) {

for (int deg_start = 0; deg_start < 360; deg_start += deg_span) {

auto noise_seed = glm::vec2((300 - radius) * cos(deg_start * DEG_TO_RAD), (300 - radius) * sin(deg_start * DEG_TO_RAD));

auto noise_value = ofNoise(glm::vec3(noise_seed * 0.01, ofGetFrameNum() * 0.005));

auto z = ofMap(noise_value, 0, 1, -radius, radius);

int param_index = this->face_mesh.getNumVertices();

for (int deg = deg_start; deg < deg_start + deg_span; deg++) {

int index = this->face_mesh.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z));

vertices.push_back(glm::vec3((radius + radius_span) * cos(deg * DEG_TO_RAD), (radius + radius_span) * sin(deg * DEG_TO_RAD), z));

vertices.push_back(glm::vec3((radius + radius_span) * cos((deg + 1) * DEG_TO_RAD), (radius + radius_span) * sin((deg + 1) * DEG_TO_RAD), z));

vertices.push_back(glm::vec3(radius * cos((deg + 1) * DEG_TO_RAD), radius * sin((deg + 1) * DEG_TO_RAD), z));

vertices.push_back(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0));

vertices.push_back(glm::vec3((radius + radius_span) * cos(deg * DEG_TO_RAD), (radius + radius_span) * sin(deg * DEG_TO_RAD), 0));

vertices.push_back(glm::vec3((radius + radius_span) * cos((deg + 1) * DEG_TO_RAD), (radius + radius_span) * sin((deg + 1) * DEG_TO_RAD), 0));

vertices.push_back(glm::vec3(radius * cos((deg + 1) * DEG_TO_RAD), radius * sin((deg + 1) * DEG_TO_RAD), 0));

this->face_mesh.addVertices(vertices);

this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 1); this->face_mesh.addIndex(index + 2);

this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 2); this->face_mesh.addIndex(index + 3);

this->face_mesh.addIndex(index + 4); this->face_mesh.addIndex(index + 5); this->face_mesh.addIndex(index + 6);

this->face_mesh.addIndex(index + 4); this->face_mesh.addIndex(index + 6); this->face_mesh.addIndex(index + 7);

this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 3); this->face_mesh.addIndex(index + 7);

this->face_mesh.addIndex(index + 0); this->face_mesh.addIndex(index + 4); this->face_mesh.addIndex(index + 7);

this->face_mesh.addIndex(index + 1); this->face_mesh.addIndex(index + 2); this->face_mesh.addIndex(index + 6);

this->face_mesh.addIndex(index + 1); this->face_mesh.addIndex(index + 5); this->face_mesh.addIndex(index + 6);

this->frame_mesh.addVertices(vertices);

this->frame_mesh.addIndex(index + 0); this->frame_mesh.addIndex(index + 3);

this->frame_mesh.addIndex(index + 4); this->frame_mesh.addIndex(index + 7);

this->frame_mesh.addIndex(index + 1); this->frame_mesh.addIndex(index + 2);

this->frame_mesh.addIndex(index + 5); this->frame_mesh.addIndex(index + 6);

}

this->face_mesh.addIndex(param_index + 0); this->face_mesh.addIndex(param_index + 1); this->face_mesh.addIndex(param_index + 5);

this->face_mesh.addIndex(param_index + 0); this->face_mesh.addIndex(param_index + 4); this->face_mesh.addIndex(param_index + 5);

this->frame_mesh.addIndex(param_index + 0); this->frame_mesh.addIndex(param_index + 1);

this->frame_mesh.addIndex(param_index + 4); this->frame_mesh.addIndex(param_index + 5);

this->frame_mesh.addIndex(param_index + 0); this->frame_mesh.addIndex(param_index + 4);

this->frame_mesh.addIndex(param_index + 1); this->frame_mesh.addIndex(param_index + 5);

param_index = this->face_mesh.getNumVertices() - 8;

this->face_mesh.addIndex(param_index + 2); this->face_mesh.addIndex(param_index + 3); this->face_mesh.addIndex(param_index + 6);

this->face_mesh.addIndex(param_index + 3); this->face_mesh.addIndex(param_index + 6); this->face_mesh.addIndex(param_index + 7);

this->frame_mesh.addIndex(param_index + 2); this->frame_mesh.addIndex(param_index + 3);

this->frame_mesh.addIndex(param_index + 6); this->frame_mesh.addIndex(param_index + 7);

this->frame_mesh.addIndex(param_index + 2); this->frame_mesh.addIndex(param_index + 6);

this->frame_mesh.addIndex(param_index + 3); this->frame_mesh.addIndex(param_index + 7);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateZ(ofGetFrameNum() * 0.5);

ofSetColor(39);

this->face_mesh.draw();

ofSetColor(239);

this->frame_mesh.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20191222

2019年12月21日

Illuminate apple. openFrameworks

[ Video ]

[ About ]
数式で描いたリンゴを照らす。

Illuminate apple.

[ 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_apple_point(float u, float v);

	ofEasyCam cam;
	vector<ofLight> light_list;
	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) {};

glm::vec3 make_apple_point(float u, float v);

ofEasyCam cam;

vector<ofLight> light_list;

ofMesh mesh;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetLineWidth(0.25);
	ofEnableDepthTest();

	ofColor specular_color, diffuse_color;
	ofSetSmoothLighting(true);
	for (int i = 0; i < 255; i += 32) {

		specular_color.setHsb(i, 255, 255);
		diffuse_color.setHsb(i, 255, 128);

		auto light = ofLight();
		light.setSpecularColor(specular_color);
		light.setDiffuseColor(diffuse_color);
		light.enable();

		this->light_list.push_back(light);
	}
}

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

	ofSeedRandom(39);

	for (auto& light : this->light_list) {

		auto location = glm::vec3(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, -300, 300),
			ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, -300, 300),
			ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, -300, 300));
		light.setPosition(glm::normalize(location) * 350);
	}

	this->mesh.clear();

	int span = 8;
	int scale = 25;
	int index;
	for (int v = 0; v < 360; v += span) {

		for (int u = -170; u < 250; u += span) {

			index = this->mesh.getNumVertices();

			this->mesh.addVertex(this->make_apple_point(u - span * 0.5, v - span * 0.5) * scale);
			this->mesh.addVertex(this->make_apple_point(u - span * 0.5, v + span * 0.5) * scale);
			this->mesh.addVertex(this->make_apple_point(u + span * 0.5, v + span * 0.5) * scale);

			this->mesh.addIndex(index); this->mesh.addIndex(index + 1); this->mesh.addIndex(index + 2);

			index = this->mesh.getNumVertices();

			this->mesh.addVertex(this->make_apple_point(u - span * 0.5, v - span * 0.5) * scale);
			this->mesh.addVertex(this->make_apple_point(u + span * 0.5, v - span * 0.5) * scale);
			this->mesh.addVertex(this->make_apple_point(u + span * 0.5, v + span * 0.5) * scale);

			this->mesh.addIndex(index); this->mesh.addIndex(index + 1); this->mesh.addIndex(index + 2);
		}
	}
}

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

	this->cam.begin();

	for (auto& light : this->light_list) {

		ofSetColor(light.getSpecularColor());
		ofDrawSphere(light.getPosition(), 5);
	}

	ofSetColor(255);
	this->mesh.draw();

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_apple_point(float u, float v) {

	// 数学デッサン教室 描いて楽しむ数学たち リンゴ局面 apple surface P.33 

	u *= DEG_TO_RAD;
	v *= DEG_TO_RAD;

	float x = (4 + 3.8 * cos(u)) * cos(v);
	float y = (4 + 3.8 * cos(u)) * sin(v);
	float z = -5 * log10(1 - 0.315 * u) + 5 * sin(u) + 2 * cos(u);

	return glm::vec3(x, y, z);
}

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

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

100

101

102

103

104

105

106

107

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofSetLineWidth(0.25);

ofEnableDepthTest();

ofColor specular_color, diffuse_color;

ofSetSmoothLighting(true);

for (int i = 0; i < 255; i += 32) {

specular_color.setHsb(i, 255, 255);

diffuse_color.setHsb(i, 255, 128);

auto light = ofLight();

light.setSpecularColor(specular_color);

light.setDiffuseColor(diffuse_color);

light.enable();

this->light_list.push_back(light);

}

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

void ofApp::update() {

ofSeedRandom(39);

for (auto& light : this->light_list) {

auto location = glm::vec3(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, -300, 300),

ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, -300, 300),

ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, -300, 300));

light.setPosition(glm::normalize(location) * 350);

}

this->mesh.clear();

int span = 8;

int scale = 25;

int index;

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

for (int u = -170; u < 250; u += span) {

index = this->mesh.getNumVertices();

this->mesh.addVertex(this->make_apple_point(u - span * 0.5, v - span * 0.5) * scale);

this->mesh.addVertex(this->make_apple_point(u - span * 0.5, v + span * 0.5) * scale);

this->mesh.addVertex(this->make_apple_point(u + span * 0.5, v + span * 0.5) * scale);

this->mesh.addIndex(index); this->mesh.addIndex(index + 1); this->mesh.addIndex(index + 2);

index = this->mesh.getNumVertices();

this->mesh.addVertex(this->make_apple_point(u - span * 0.5, v - span * 0.5) * scale);

this->mesh.addVertex(this->make_apple_point(u + span * 0.5, v - span * 0.5) * scale);

this->mesh.addVertex(this->make_apple_point(u + span * 0.5, v + span * 0.5) * scale);

this->mesh.addIndex(index); this->mesh.addIndex(index + 1); this->mesh.addIndex(index + 2);

}

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

void ofApp::draw() {

this->cam.begin();

for (auto& light : this->light_list) {

ofSetColor(light.getSpecularColor());

ofDrawSphere(light.getPosition(), 5);

}

ofSetColor(255);

this->mesh.draw();

this->cam.end();

}

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

glm::vec3 ofApp::make_apple_point(float u, float v) {

// 数学デッサン教室描いて楽しむ数学たちリンゴ局面 apple surface P.33

u *= DEG_TO_RAD;

v *= DEG_TO_RAD;

float x = (4 + 3.8 * cos(u)) * cos(v);

float y = (4 + 3.8 * cos(u)) * sin(v);

float z = -5 * log10(1 - 0.315 * u) + 5 * sin(u) + 2 * cos(u);

return glm::vec3(x, y, z);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20191221

2025年12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
29	30	31