ofMesh – ページ 111 – プログラミング de 落描き

2021年8月13日2021年8月13日

Tentacle. Draw by openFrameworks

[ Video ]

[ About ]
ofIcoSphereから取得した面を外周へ伸ばしていく。

Extend the surface obtained from the ofIcoSphere to the periphery.

[ 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;
	float base_radius;
	ofIcoSpherePrimitive ico_sphere;
	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;

float base_radius;

ofIcoSpherePrimitive ico_sphere;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

	this->base_radius = 65;
	this->ico_sphere = ofIcoSpherePrimitive(this->base_radius, 3);
	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}

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

	ofSeedRandom(39);

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

	float radius_start = this->base_radius;
	float radius_max = this->base_radius * 5;
	for (auto& triangle : this->ico_sphere.getMesh().getUniqueFaces()) {

		auto noise_seed_x = ofRandom(1000);
		auto noise_seed_y = ofRandom(1000);
		auto noise_seed_z = ofRandom(1000);

		auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005);
		float radius_end = noise_value > 0.83 ? ofMap(noise_value, 0.83, 1, radius_start, radius_max) : radius_start;
		this->frame.addVertex(glm::vec3());

		for (float radius = radius_start; radius <= radius_end; radius += 1.5) {

			auto mesh_index = this->face.getNumVertices();
			auto frame_index = this->frame.getNumVertices();

			auto param = ofMap(radius, radius_start, radius_max, 0, PI * 0.30);

			auto angle_x = ofMap(ofNoise(noise_seed_x, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);
			auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));
			auto angle_y = ofMap(ofNoise(noise_seed_y, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);
			auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));
			auto angle_z = ofMap(ofNoise(noise_seed_z, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);
			auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

			glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3;
			glm::vec3 location = glm::normalize(avg) * radius;

			vector<glm::vec3> vertices;
			vertices.push_back(glm::vec4(location + (triangle.getVertex(0) - avg), 0) * rotation_z * rotation_y * rotation_x);
			vertices.push_back(glm::vec4(location + (triangle.getVertex(1) - avg), 0) * rotation_z * rotation_y * rotation_x);
			vertices.push_back(glm::vec4(location + (triangle.getVertex(2) - avg), 0) * rotation_z * rotation_y * rotation_x);

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

			if (radius == radius_start || radius == radius_end) {

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

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

			if (radius > radius_start) {

				this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index - 2);
				this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 2); this->face.addIndex(mesh_index - 3);

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

				this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 3);
				this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index - 3); this->face.addIndex(mesh_index - 1);


				this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index - 3);
				this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index - 2);
				this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index - 1);
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.25);

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

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

	this->cam.end();
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofEnableDepthTest();

this->base_radius = 65;

this->ico_sphere = ofIcoSpherePrimitive(this->base_radius, 3);

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

float radius_start = this->base_radius;

float radius_max = this->base_radius * 5;

for (auto& triangle : this->ico_sphere.getMesh().getUniqueFaces()) {

auto noise_seed_x = ofRandom(1000);

auto noise_seed_y = ofRandom(1000);

auto noise_seed_z = ofRandom(1000);

auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005);

float radius_end = noise_value > 0.83 ? ofMap(noise_value, 0.83, 1, radius_start, radius_max) : radius_start;

this->frame.addVertex(glm::vec3());

for (float radius = radius_start; radius <= radius_end; radius += 1.5) {

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

auto frame_index = this->frame.getNumVertices();

auto param = ofMap(radius, radius_start, radius_max, 0, PI * 0.30);

auto angle_x = ofMap(ofNoise(noise_seed_x, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);

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

auto angle_y = ofMap(ofNoise(noise_seed_y, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);

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

auto angle_z = ofMap(ofNoise(noise_seed_z, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);

auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3;

glm::vec3 location = glm::normalize(avg) * radius;

vector<glm::vec3> vertices;

vertices.push_back(glm::vec4(location + (triangle.getVertex(0) - avg), 0) * rotation_z * rotation_y * rotation_x);

vertices.push_back(glm::vec4(location + (triangle.getVertex(1) - avg), 0) * rotation_z * rotation_y * rotation_x);

vertices.push_back(glm::vec4(location + (triangle.getVertex(2) - avg), 0) * rotation_z * rotation_y * rotation_x);

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

if (radius == radius_start || radius == radius_end) {

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

}

this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index + 1);

this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index + 2);

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

if (radius > radius_start) {

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

this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 2); this->face.addIndex(mesh_index - 3);

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

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

this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 3);

this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index - 3); this->face.addIndex(mesh_index - 1);

this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index - 3);

this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index - 2);

this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index - 1);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.25);

ofSetColor(239);

this->frame.drawWireframe();

ofSetColor(39);

this->face.draw();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210813

[ Kinako ]

2021年8月11日2021年8月11日

Transformation sphere. Draw by openFrameworks

[ Video ]

[ About ]
昨日のソースコードから3行ほど変更をしました。
少しの変更でも見た目が大きく変化するのが楽しいです。

I changed about three lines from yesterday’s source code.
It’s fun to see how a small change can make a big difference in appearance.

[ 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 mesh, draw_mesh, line_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 mesh, draw_mesh, line_mesh;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(2);
	ofEnableDepthTest();

	auto ico_sphere = ofIcoSpherePrimitive(300, 3);
	this->mesh = ico_sphere.getMesh();
}

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

	this->draw_mesh = this->mesh;
	this->line_mesh = this->mesh;

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

		glm::vec3 vertex = this->draw_mesh.getVertex(i);
		//auto noise_value = ofNoise(glm::vec4(vertex * 0.003, ofGetFrameNum() * 0.005));
		auto noise_value = ofNoise(glm::vec2(i * 0.001, ofGetFrameNum() * 0.008));

		ofColor color = ofColor(239);

		if (noise_value < 0.5) {

			if (noise_value < 0.4) {

				vertex = glm::normalize(vertex) * 250; // 0 -> 250
				color = ofColor(0);
			}
			else {

				vertex = glm::normalize(vertex) * ofMap(noise_value, 0.4, 0.5, 250, 300); // 0 -> 250
				color = ofColor(ofMap(noise_value, 0.4, 0.5, 0, 239));
			}
		}

		this->draw_mesh.setVertex(i, vertex);
		this->line_mesh.setVertex(i, vertex);
		this->draw_mesh.addColor(color);

	}
}

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

	this->cam.begin();
	ofRotateX(ofGetFrameNum() * 0.37);
	ofRotateY(ofGetFrameNum() * 0.72);

	this->draw_mesh.draw();

	ofSetColor(0);
	this->line_mesh.drawWireframe();

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

auto ico_sphere = ofIcoSpherePrimitive(300, 3);

this->mesh = ico_sphere.getMesh();

}

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

void ofApp::update() {

this->draw_mesh = this->mesh;

this->line_mesh = this->mesh;

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

glm::vec3 vertex = this->draw_mesh.getVertex(i);

//auto noise_value = ofNoise(glm::vec4(vertex * 0.003, ofGetFrameNum() * 0.005));

auto noise_value = ofNoise(glm::vec2(i * 0.001, ofGetFrameNum() * 0.008));

ofColor color = ofColor(239);

if (noise_value < 0.5) {

if (noise_value < 0.4) {

vertex = glm::normalize(vertex) * 250; // 0 -> 250

color = ofColor(0);

}

else {

vertex = glm::normalize(vertex) * ofMap(noise_value, 0.4, 0.5, 250, 300); // 0 -> 250

color = ofColor(ofMap(noise_value, 0.4, 0.5, 0, 239));

}

this->draw_mesh.setVertex(i, vertex);

this->line_mesh.setVertex(i, vertex);

this->draw_mesh.addColor(color);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(ofGetFrameNum() * 0.37);

ofRotateY(ofGetFrameNum() * 0.72);

this->draw_mesh.draw();

ofSetColor(0);

this->line_mesh.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210811

2021年8月10日2021年8月10日

Concave Sphere. Draw by openFrameworks

[ Video ]

[ About ]
ofIcoSphereからofIcoSphere.getMesh()取得したメッシュにofMesh.setVertex(index, vertex)で各頂点を上書きして形を変形させる。

ofMesh.setVertex(index, vertex) is used to overwrite each vertex on the mesh obtained from ofIcoSphere.getMesh() to deform the shape.

[ 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 mesh, draw_mesh, line_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 mesh, draw_mesh, line_mesh;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(2);
	ofEnableDepthTest();

	auto ico_sphere = ofIcoSpherePrimitive(300, 3);
	this->mesh = ico_sphere.getMesh();
}

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

	this->draw_mesh = this->mesh;
	this->line_mesh = this->mesh;

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

		glm::vec3 vertex = this->draw_mesh.getVertex(i);
		auto noise_value = ofNoise(glm::vec4(vertex * 0.005, ofGetFrameNum() * 0.005));

		ofColor color = ofColor(239);

		if (noise_value < 0.5) {

			if (noise_value < 0.4) {

				vertex = glm::normalize(vertex) * 0;
				color = ofColor(0);
			}
			else {

				vertex = glm::normalize(vertex) * ofMap(noise_value, 0.4, 0.5, 0, 300);
				color = ofColor(ofMap(noise_value, 0.4, 0.5, 0, 239));
			}
		}

		this->draw_mesh.setVertex(i, vertex);
		this->line_mesh.setVertex(i, vertex);
		this->draw_mesh.addColor(color);

	}
}

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

	this->cam.begin();
	ofRotateX(ofGetFrameNum() * 0.37);
	ofRotateY(ofGetFrameNum() * 0.72);

	this->draw_mesh.draw();

	ofSetColor(39);
	this->line_mesh.drawWireframe();

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

auto ico_sphere = ofIcoSpherePrimitive(300, 3);

this->mesh = ico_sphere.getMesh();

}

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

void ofApp::update() {

this->draw_mesh = this->mesh;

this->line_mesh = this->mesh;

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

glm::vec3 vertex = this->draw_mesh.getVertex(i);

auto noise_value = ofNoise(glm::vec4(vertex * 0.005, ofGetFrameNum() * 0.005));

ofColor color = ofColor(239);

if (noise_value < 0.5) {

if (noise_value < 0.4) {

vertex = glm::normalize(vertex) * 0;

color = ofColor(0);

}

else {

vertex = glm::normalize(vertex) * ofMap(noise_value, 0.4, 0.5, 0, 300);

color = ofColor(ofMap(noise_value, 0.4, 0.5, 0, 239));

}

this->draw_mesh.setVertex(i, vertex);

this->line_mesh.setVertex(i, vertex);

this->draw_mesh.addColor(color);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(ofGetFrameNum() * 0.37);

ofRotateY(ofGetFrameNum() * 0.72);

this->draw_mesh.draw();

ofSetColor(39);

this->line_mesh.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210810

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