2020年10月30日 – プログラミング de 落描き

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球体分割。

Split sphere.

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#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, frame;
};

#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, frame;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetColor(39);
	ofEnableDepthTest();
	ofSetLineWidth(0.5);

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

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

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

	int radius = 120;
	int phi_deg_step = 5;

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

		for (int z = -300; z <= 300; z += 300) {

			for (float theta_deg = 1; theta_deg < 180; theta_deg += 1) {

				auto noise_z = radius * cos(theta_deg * DEG_TO_RAD);
				auto noise_value = ofNoise(x, z, noise_z * 0.02 + ofGetFrameNum() * 0.03);

				if (noise_value < 0.55) { continue; }

				auto angle_x = ofMap(ofNoise(x, ofGetFrameNum() * 0.002), 0, 1, -PI * 2, PI * 2);
				auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));

				auto angle_y = ofMap(ofNoise(z, ofGetFrameNum() * 0.002), 0, 1, -PI * 2, PI * 2);
				auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));

				auto start_index = this->face.getNumVertices();
				for (int phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

					auto index = this->face.getNumVertices();

					vector<glm::vec3> vertices;

					vertices.push_back(glm::vec3(x, 0, z) + glm::vec4(radius * sin((theta_deg - 0.5) * DEG_TO_RAD) * cos(phi_deg * DEG_TO_RAD), radius * sin((theta_deg - 0.5) * DEG_TO_RAD) * sin(phi_deg * DEG_TO_RAD), radius * cos((theta_deg - 0.5) * DEG_TO_RAD), 0) * rotation_y * rotation_x);
					vertices.push_back(glm::vec3(x, 0, z) + glm::vec4(radius * sin((theta_deg + 0.5) * DEG_TO_RAD) * cos(phi_deg * DEG_TO_RAD), radius * sin((theta_deg + 0.5) * DEG_TO_RAD) * sin(phi_deg * DEG_TO_RAD), radius * cos((theta_deg + 0.5) * DEG_TO_RAD), 0) * rotation_y * rotation_x);

					this->face.addVertices(vertices);
					this->frame.addVertices(vertices);

					if (phi_deg > 0) {

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

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

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

				auto index = this->face.getNumVertices() - 2;
				this->face.addIndex(start_index + 0); this->face.addIndex(index + 0); this->face.addIndex(index + 1);
				this->face.addIndex(start_index + 1); this->face.addIndex(index + 1); this->face.addIndex(start_index + 1);

				this->frame.addIndex(start_index + 0); this->frame.addIndex(index + 0);
				this->frame.addIndex(start_index + 1); this->frame.addIndex(index + 1);
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateX(270);

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

	ofSetColor(239, 96);
	this->frame.drawWireframe();

	this->cam.end();
}

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

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

100

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofEnableDepthTest();

ofSetLineWidth(0.5);

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

}

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

void ofApp::update() {

this->face.clear();

this->frame.clear();

int radius = 120;

int phi_deg_step = 5;

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

for (int z = -300; z <= 300; z += 300) {

for (float theta_deg = 1; theta_deg < 180; theta_deg += 1) {

auto noise_z = radius * cos(theta_deg * DEG_TO_RAD);

auto noise_value = ofNoise(x, z, noise_z * 0.02 + ofGetFrameNum() * 0.03);

if (noise_value < 0.55) { continue; }

auto angle_x = ofMap(ofNoise(x, ofGetFrameNum() * 0.002), 0, 1, -PI * 2, PI * 2);

auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));

auto angle_y = ofMap(ofNoise(z, ofGetFrameNum() * 0.002), 0, 1, -PI * 2, PI * 2);

auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));

auto start_index = this->face.getNumVertices();

for (int phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

auto index = this->face.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(x, 0, z) + glm::vec4(radius * sin((theta_deg - 0.5) * DEG_TO_RAD) * cos(phi_deg * DEG_TO_RAD), radius * sin((theta_deg - 0.5) * DEG_TO_RAD) * sin(phi_deg * DEG_TO_RAD), radius * cos((theta_deg - 0.5) * DEG_TO_RAD), 0) * rotation_y * rotation_x);

vertices.push_back(glm::vec3(x, 0, z) + glm::vec4(radius * sin((theta_deg + 0.5) * DEG_TO_RAD) * cos(phi_deg * DEG_TO_RAD), radius * sin((theta_deg + 0.5) * DEG_TO_RAD) * sin(phi_deg * DEG_TO_RAD), radius * cos((theta_deg + 0.5) * DEG_TO_RAD), 0) * rotation_y * rotation_x);

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

if (phi_deg > 0) {

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

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

this->face.addIndex(index + 0); this->face.addIndex(index - 2); this->face.addIndex(start_index + 0);

this->face.addIndex(index + 1); this->face.addIndex(index - 1); this->face.addIndex(start_index + 1);

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

this->frame.addIndex(index + 1); this->frame.addIndex(index - 1);

}

auto index = this->face.getNumVertices() - 2;

this->face.addIndex(start_index + 0); this->face.addIndex(index + 0); this->face.addIndex(index + 1);

this->face.addIndex(start_index + 1); this->face.addIndex(index + 1); this->face.addIndex(start_index + 1);

this->frame.addIndex(start_index + 0); this->frame.addIndex(index + 0);

this->frame.addIndex(start_index + 1); this->frame.addIndex(index + 1);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(270);

ofSetColor(39);

this->face.draw();

ofSetColor(239, 96);

this->frame.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20201030

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日: 2020年10月30日

Split sphere. Draw by openFrameworks