openFrameworks – ページ 418 – プログラミング de 落描き

2021年9月17日2021年9月17日

From frame gap. Draw by openFrameworks

[ Video ]

[ About ]
画像として大きく動きがあった場所にオブジェクトを生成させる。

Let the object be generated in the place where there was a large movement as an image.

[ Source ]

#pragma once
#include "ofMain.h"
#include "opencv2/opencv.hpp"
#include "ofxBox2d.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) {};

	cv::VideoCapture cap;
	cv::Size cap_size;
	int number_of_frames;
	vector<cv::Mat> frame_list;

	float rect_size;
	vector<cv::Mat> rect_frame_list;
	vector<unique_ptr<ofImage>> rect_image_list;
	vector<cv::Rect> cv_rect_list;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dRect>> box2d_rect_list;
	vector<int> box2d_frame_index_list, box2d_rect_index_list;
	vector<float> box2d_life_list;
	vector<ofColor> box2d_color_list;

	ofEasyCam cam;
};

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

#include "ofxBox2d.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) {};

cv::VideoCapture cap;

cv::Size cap_size;

int number_of_frames;

vector<cv::Mat> frame_list;

float rect_size;

vector<cv::Mat> rect_frame_list;

vector<unique_ptr<ofImage>> rect_image_list;

vector<cv::Rect> cv_rect_list;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dRect>> box2d_rect_list;

vector<int> box2d_frame_index_list, box2d_rect_index_list;

vector<float> box2d_life_list;

vector<ofColor> box2d_color_list;

ofEasyCam cam;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();
	ofDisableArbTex();

	this->cap_size = cv::Size(640, 360);
	this->rect_size = 20;
	for (int x = 0; x < this->cap_size.width; x += this->rect_size) {

		for (int y = 0; y < this->cap_size.height; y += this->rect_size) {

			auto image = make_unique<ofImage>();
			image->allocate(this->rect_size, this->rect_size, OF_IMAGE_COLOR);
			cv::Mat frame = cv::Mat(cv::Size(image->getWidth(), image->getHeight()), CV_MAKETYPE(CV_8UC3, image->getPixels().getNumChannels()), image->getPixels().getData(), 0);
			cv::Rect rect = cv::Rect(x, y, this->rect_size, this->rect_size);

			this->rect_image_list.push_back(move(image));
			this->cv_rect_list.push_back(rect);
			this->rect_frame_list.push_back(frame);
		}
	}

	auto file_path = "D:\\MP4\\VN20210917_145135.mp4";
	this->cap.open(file_path);
	this->number_of_frames = 0;
	while(true) {

		cv::Mat src, tmp;
		this->cap >> src;
		if (src.empty()) {

			break;
		}

		cv::resize(src, tmp, this->cap_size);
		cv::cvtColor(tmp, tmp, cv::COLOR_BGR2RGB);

		this->frame_list.push_back(tmp);
		this->number_of_frames++;
	}

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();
}

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

	for (int i = this->box2d_rect_list.size() - 1; i > -1; i--) {

		this->box2d_life_list[i] -= 3;
		if (this->box2d_life_list[i] < 0) {

			this->box2d_rect_list.erase(this->box2d_rect_list.begin() + i);
			this->box2d_frame_index_list.erase(this->box2d_frame_index_list.begin() + i);
			this->box2d_rect_index_list.erase(this->box2d_rect_index_list.begin() + i);
			this->box2d_life_list.erase(this->box2d_life_list.begin() + i);
			this->box2d_color_list.erase(this->box2d_color_list.begin() + i);
		}
	}


	if (ofGetFrameNum() % 5 == 0) {

		int frame_index = (int)(ofGetFrameNum() * 0.5) % this->number_of_frames;
		int next_frame_index = (frame_index + 1) % this->number_of_frames;

		if (frame_index < next_frame_index) {

			cv::Mat gap = this->frame_list[frame_index] - this->frame_list[next_frame_index];

			vector<ofColor> base_color_list;
			ofColor color;
			vector<int> hex_list = { 0x247BA0, 0x70C1B3, 0xB2DBBF, 0xF3FFBD, 0xFF1654 };
			for (auto hex : hex_list) {

				color.setHex(hex);
				base_color_list.push_back(color);
			}

			for (int i = 0; i < this->cv_rect_list.size(); i++) {

				int x = this->cv_rect_list[i].x + this->rect_size * 0.5;
				int y = this->cv_rect_list[i].y + this->rect_size * 0.5;

				cv::Vec3b* gap_value = gap.ptr<cv::Vec3b>(y, 0);
				cv::Vec3b* color_value = this->frame_list[frame_index].ptr<cv::Vec3b>(y, 0);
				cv::Vec3b gv = gap_value[x];
				cv::Vec3b cv = color_value[x];
				if ((gv[0] + gv[1] + gv[2]) > 80) {

					int rect_index = i;

					auto box2d_rect = make_shared<ofxBox2dRect>();
					box2d_rect->setPhysics(0.5, 0.83, 0.1);
					box2d_rect->setup(this->box2d.getWorld(), this->cv_rect_list[rect_index].x + 50, this->cv_rect_list[rect_index].y + 30, this->rect_size, this->rect_size);

					this->box2d_rect_list.push_back(box2d_rect);
					this->box2d_frame_index_list.push_back(next_frame_index);
					this->box2d_rect_index_list.push_back(rect_index);
					this->box2d_life_list.push_back(255);
					this->box2d_color_list.push_back(base_color_list[ofRandom(base_color_list.size())]);
				}
			}
		}
	}

	this->box2d.update();
}

//--------------------------------------------------------------
void ofApp::draw() {
	
	this->cam.begin();
	ofRotateX(180);
	ofTranslate(ofGetWidth() * -0.5, ofGetHeight() * -0.5);

	ofSetLineWidth(0.8);
	for (int i = 0; i < this->rect_frame_list.size(); i++) {

		ofPushMatrix();
		ofTranslate(this->cv_rect_list[i].x + 50, this->cv_rect_list[i].y + 30, 1);
		ofRotateX(180);

		int frame_index = (int)(ofGetFrameNum() * 0.5) % this->number_of_frames;

		cv::Mat tmp_box_image(this->frame_list[frame_index], this->cv_rect_list[i]);
		tmp_box_image.copyTo(this->rect_frame_list[i]);

		this->rect_image_list[i]->update();
		this->rect_image_list[i]->getTexture().bind();
		ofSetColor(255);
		ofFill();
		ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);
		this->rect_image_list[i]->unbind();

		ofSetColor(39);
		ofNoFill();
		ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

		ofPopMatrix();
	}

	for (int i = 0; i < this->box2d_rect_list.size(); i++) {

		ofPushMatrix();
		ofTranslate(this->box2d_rect_list[i]->getPosition().x, this->box2d_rect_list[i]->getPosition().y, -1);
		ofRotateX(180);
		ofRotate(this->box2d_rect_list[i]->getRotation());

		ofSetColor(this->box2d_color_list[i], this->box2d_life_list[i] > 128 ? 192 : ofMap(this->box2d_life_list[i], 128, 0, 192, 0));
		ofFill();
		ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

		/*
		int frame_index = this->box2d_frame_index_list[i];
		int rect_index = this->box2d_rect_index_list[i];

		cv::Mat tmp_box_image(this->frame_list[frame_index], this->cv_rect_list[rect_index]);
		tmp_box_image.copyTo(this->rect_frame_list[rect_index]);

		this->rect_image_list[rect_index]->update();
		this->rect_image_list[rect_index]->getTexture().bind();
		ofSetColor(255, this->box2d_life_list[i] > 128 ? 255 : ofMap(this->box2d_life_list[i], 128, 0, 255, 0));
		ofFill();
		ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);
		this->rect_image_list[rect_index]->unbind();

		*/

		ofSetColor(39, this->box2d_life_list[i] > 128 ? 255 : ofMap(this->box2d_life_list[i], 128, 0, 255, 0));
		ofNoFill();
		ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

		ofPopMatrix();
	}

	ofSetLineWidth(3);
	ofSetColor(39);
	ofDrawRectangle(glm::vec3(), 720, 720);

	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();

ofDisableArbTex();

this->cap_size = cv::Size(640, 360);

this->rect_size = 20;

for (int x = 0; x < this->cap_size.width; x += this->rect_size) {

for (int y = 0; y < this->cap_size.height; y += this->rect_size) {

auto image = make_unique<ofImage>();

image->allocate(this->rect_size, this->rect_size, OF_IMAGE_COLOR);

cv::Mat frame = cv::Mat(cv::Size(image->getWidth(), image->getHeight()), CV_MAKETYPE(CV_8UC3, image->getPixels().getNumChannels()), image->getPixels().getData(), 0);

cv::Rect rect = cv::Rect(x, y, this->rect_size, this->rect_size);

this->rect_image_list.push_back(move(image));

this->cv_rect_list.push_back(rect);

this->rect_frame_list.push_back(frame);

}

auto file_path = "D:\\MP4\\VN20210917_145135.mp4";

this->cap.open(file_path);

this->number_of_frames = 0;

while(true) {

cv::Mat src, tmp;

this->cap >> src;

if (src.empty()) {

break;

}

cv::resize(src, tmp, this->cap_size);

cv::cvtColor(tmp, tmp, cv::COLOR_BGR2RGB);

this->frame_list.push_back(tmp);

this->number_of_frames++;

}

this->box2d.init();

this->box2d.setGravity(0, 50);

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

for (int i = this->box2d_rect_list.size() - 1; i > -1; i--) {

this->box2d_life_list[i] -= 3;

if (this->box2d_life_list[i] < 0) {

this->box2d_rect_list.erase(this->box2d_rect_list.begin() + i);

this->box2d_frame_index_list.erase(this->box2d_frame_index_list.begin() + i);

this->box2d_rect_index_list.erase(this->box2d_rect_index_list.begin() + i);

this->box2d_life_list.erase(this->box2d_life_list.begin() + i);

this->box2d_color_list.erase(this->box2d_color_list.begin() + i);

}

if (ofGetFrameNum() % 5 == 0) {

int frame_index = (int)(ofGetFrameNum() * 0.5) % this->number_of_frames;

int next_frame_index = (frame_index + 1) % this->number_of_frames;

if (frame_index < next_frame_index) {

cv::Mat gap = this->frame_list[frame_index] - this->frame_list[next_frame_index];

vector<ofColor> base_color_list;

ofColor color;

vector<int> hex_list = { 0x247BA0, 0x70C1B3, 0xB2DBBF, 0xF3FFBD, 0xFF1654 };

for (auto hex : hex_list) {

color.setHex(hex);

base_color_list.push_back(color);

}

for (int i = 0; i < this->cv_rect_list.size(); i++) {

int x = this->cv_rect_list[i].x + this->rect_size * 0.5;

int y = this->cv_rect_list[i].y + this->rect_size * 0.5;

cv::Vec3b* gap_value = gap.ptr<cv::Vec3b>(y, 0);

cv::Vec3b* color_value = this->frame_list[frame_index].ptr<cv::Vec3b>(y, 0);

cv::Vec3b gv = gap_value[x];

cv::Vec3b cv = color_value[x];

if ((gv[0] + gv[1] + gv[2]) > 80) {

int rect_index = i;

auto box2d_rect = make_shared<ofxBox2dRect>();

box2d_rect->setPhysics(0.5, 0.83, 0.1);

box2d_rect->setup(this->box2d.getWorld(), this->cv_rect_list[rect_index].x + 50, this->cv_rect_list[rect_index].y + 30, this->rect_size, this->rect_size);

this->box2d_rect_list.push_back(box2d_rect);

this->box2d_frame_index_list.push_back(next_frame_index);

this->box2d_rect_index_list.push_back(rect_index);

this->box2d_life_list.push_back(255);

this->box2d_color_list.push_back(base_color_list[ofRandom(base_color_list.size())]);

}

this->box2d.update();

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

ofTranslate(ofGetWidth() * -0.5, ofGetHeight() * -0.5);

ofSetLineWidth(0.8);

for (int i = 0; i < this->rect_frame_list.size(); i++) {

ofPushMatrix();

ofTranslate(this->cv_rect_list[i].x + 50, this->cv_rect_list[i].y + 30, 1);

ofRotateX(180);

int frame_index = (int)(ofGetFrameNum() * 0.5) % this->number_of_frames;

cv::Mat tmp_box_image(this->frame_list[frame_index], this->cv_rect_list[i]);

tmp_box_image.copyTo(this->rect_frame_list[i]);

this->rect_image_list[i]->update();

this->rect_image_list[i]->getTexture().bind();

ofSetColor(255);

ofFill();

ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

this->rect_image_list[i]->unbind();

ofSetColor(39);

ofNoFill();

ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

ofPopMatrix();

}

for (int i = 0; i < this->box2d_rect_list.size(); i++) {

ofPushMatrix();

ofTranslate(this->box2d_rect_list[i]->getPosition().x, this->box2d_rect_list[i]->getPosition().y, -1);

ofRotateX(180);

ofRotate(this->box2d_rect_list[i]->getRotation());

ofSetColor(this->box2d_color_list[i], this->box2d_life_list[i] > 128 ? 192 : ofMap(this->box2d_life_list[i], 128, 0, 192, 0));

ofFill();

ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

int frame_index = this->box2d_frame_index_list[i];

int rect_index = this->box2d_rect_index_list[i];

cv::Mat tmp_box_image(this->frame_list[frame_index], this->cv_rect_list[rect_index]);

tmp_box_image.copyTo(this->rect_frame_list[rect_index]);

this->rect_image_list[rect_index]->update();

this->rect_image_list[rect_index]->getTexture().bind();

ofSetColor(255, this->box2d_life_list[i] > 128 ? 255 : ofMap(this->box2d_life_list[i], 128, 0, 255, 0));

ofFill();

ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

this->rect_image_list[rect_index]->unbind();

ofSetColor(39, this->box2d_life_list[i] > 128 ? 255 : ofMap(this->box2d_life_list[i], 128, 0, 255, 0));

ofNoFill();

ofDrawPlane(glm::vec3(), this->rect_size, this->rect_size);

ofPopMatrix();

}

ofSetLineWidth(3);

ofSetColor(39);

ofDrawRectangle(glm::vec3(), 720, 720);

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210917

2021年9月16日2021年9月16日

Difference in rotation axis. Draw by openFrameworks

[ Video ]

[ About ]
ofRotateに与えるAxisパラメータを3パターン試す。

Try three patterns for the Axis parameter given to ofRotate.

[ 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 font_size;
	ofTrueTypeFont font;
};

#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 font_size;

ofTrueTypeFont font;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

	this->font_size = 80;
	this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true);
}


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

	ofSeedRandom(39);
}

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

	this->cam.begin();
	ofRotateX(180);

	string word = "JunKiyoshi";
	auto path_list = font.getStringAsPoints(word, true, false);

	vector<glm::vec3> rotate_param = { glm::vec3(1, 0, 0), glm::vec3(0, 0, 1), glm::vec3(0, 1, 0) };

	for (int i = 0; i < rotate_param.size(); i++) {

		for (auto& path : path_list) {

			vector<ofPolyline> outline = path.getOutline();

			int y = i * 300 - 300;

			ofPushMatrix();
			ofTranslate(0, y, 0);

			ofSetColor(39);
			ofFill();

			ofBeginShape();
			for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

				if (outline_index != 0) { ofNextContour(true); }

				outline[outline_index] = outline[outline_index].getResampledByCount(100);
				auto vertices = outline[outline_index].getVertices();
				for (int vertices_index = 0; vertices_index < vertices.size(); vertices_index++) {

					auto location = glm::vec3(vertices[vertices_index].x - this->font.stringWidth(word) * 0.5, vertices[vertices_index].y + this->font.stringHeight(word) * 0.25, 0);
					auto angle = ofMap(ofNoise(abs(location.x) * 0.003 + ofGetFrameNum() * 0.02), 0, 1, -PI * 1, PI * 1);
					auto rotation = glm::rotate(glm::mat4(), angle, rotate_param[i]);
					location = glm::vec4(location, 0) * rotation;

					ofVertex(location);
				}
			}
			ofEndShape(true);

			ofSetColor(239);
			ofNoFill();

			ofBeginShape();
			for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

				if (outline_index != 0) { ofNextContour(true); }

				outline[outline_index] = outline[outline_index].getResampledByCount(100);
				auto vertices = outline[outline_index].getVertices();
				for (int vertices_index = 0; vertices_index < vertices.size(); vertices_index++) {

					auto location = glm::vec3(vertices[vertices_index].x - this->font.stringWidth(word) * 0.5, vertices[vertices_index].y + this->font.stringHeight(word) * 0.25, 0);
					auto angle = ofMap(ofNoise(abs(location.x) * 0.003 + ofGetFrameNum() * 0.02), 0, 1, -PI * 1, PI * 1);
					auto rotation = glm::rotate(glm::mat4(), angle, rotate_param[i]);
					location = glm::vec4(location, 0) * rotation;

					ofVertex(location);
				}
			}
			ofEndShape(true);

			ofPopMatrix();
		}
	}

	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);

ofSetLineWidth(1.5);

ofEnableDepthTest();

this->font_size = 80;

this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

string word = "JunKiyoshi";

auto path_list = font.getStringAsPoints(word, true, false);

vector<glm::vec3> rotate_param = { glm::vec3(1, 0, 0), glm::vec3(0, 0, 1), glm::vec3(0, 1, 0) };

for (int i = 0; i < rotate_param.size(); i++) {

for (auto& path : path_list) {

vector<ofPolyline> outline = path.getOutline();

int y = i * 300 - 300;

ofPushMatrix();

ofTranslate(0, y, 0);

ofSetColor(39);

ofFill();

ofBeginShape();

for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

if (outline_index != 0) { ofNextContour(true); }

outline[outline_index] = outline[outline_index].getResampledByCount(100);

auto vertices = outline[outline_index].getVertices();

for (int vertices_index = 0; vertices_index < vertices.size(); vertices_index++) {

auto location = glm::vec3(vertices[vertices_index].x - this->font.stringWidth(word) * 0.5, vertices[vertices_index].y + this->font.stringHeight(word) * 0.25, 0);

auto angle = ofMap(ofNoise(abs(location.x) * 0.003 + ofGetFrameNum() * 0.02), 0, 1, -PI * 1, PI * 1);

auto rotation = glm::rotate(glm::mat4(), angle, rotate_param[i]);

location = glm::vec4(location, 0) * rotation;

ofVertex(location);

}

ofEndShape(true);

ofSetColor(239);

ofNoFill();

ofBeginShape();

for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

if (outline_index != 0) { ofNextContour(true); }

outline[outline_index] = outline[outline_index].getResampledByCount(100);

auto vertices = outline[outline_index].getVertices();

for (int vertices_index = 0; vertices_index < vertices.size(); vertices_index++) {

auto location = glm::vec3(vertices[vertices_index].x - this->font.stringWidth(word) * 0.5, vertices[vertices_index].y + this->font.stringHeight(word) * 0.25, 0);

auto angle = ofMap(ofNoise(abs(location.x) * 0.003 + ofGetFrameNum() * 0.02), 0, 1, -PI * 1, PI * 1);

auto rotation = glm::rotate(glm::mat4(), angle, rotate_param[i]);

location = glm::vec4(location, 0) * rotation;

ofVertex(location);

}

ofEndShape(true);

ofPopMatrix();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210916

2021年9月15日2021年9月15日

Colorfull torus. Draw by openFrameworks

[ Video ]

[ About ]
トーラス座標を計算する関数で遊ぶ。

Play with functions to calculate the torus coordinates.

[ 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;
	ofMesh face, line;
};

#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;

ofMesh face, line;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(3);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

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

	auto R = 100.f;
	auto u = 0.f;
	auto u_step = 10.f;
	auto v_step = 5.f;

	ofColor color;
	for (int i = 0; i < 36; i++) {

		auto r = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.01), 0, 1, 10, 45);
		float angle_z = (i * 5) * DEG_TO_RAD;
		auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));
		color.setHsb(ofMap(i, 0, 36, 0, 255), 230, 255);
		for (auto v = 0; v < 360; v += v_step) {

			vector<glm::vec3> vertices{
				glm::vec4(this->make_point(R, r, u, v), 0) * rotation_z,
				glm::vec4(this->make_point(R, r, u + u_step, v + v_step), 0) * rotation_z,
				glm::vec4(this->make_point(R, r, u, v + v_step), 0) * rotation_z,
				glm::vec4(this->make_point(R, r, u - u_step, v), 0) * rotation_z
			};

			this->face.addVertices(vertices);

			this->line.addVertices(vertices);

			for (int k = 0; k < vertices.size(); k++) {

				this->face.addColor(ofColor(color, 138));
				this->line.addColor(color);
			}

			auto index = this->face.getVertices().size() - 1; // 末尾の番地

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

			this->line.addIndex(index - 3); this->line.addIndex(index - 2);
			this->line.addIndex(index); this->line.addIndex(index - 1);

			u += u_step;
		}
	}
}

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

	this->cam.begin();

	this->face.draw();
	this->line.draw();

	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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(3);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->line.clear();

auto R = 100.f;

auto u = 0.f;

auto u_step = 10.f;

auto v_step = 5.f;

ofColor color;

for (int i = 0; i < 36; i++) {

auto r = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.01), 0, 1, 10, 45);

float angle_z = (i * 5) * DEG_TO_RAD;

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

color.setHsb(ofMap(i, 0, 36, 0, 255), 230, 255);

for (auto v = 0; v < 360; v += v_step) {

vector<glm::vec3> vertices{

glm::vec4(this->make_point(R, r, u, v), 0) * rotation_z,

glm::vec4(this->make_point(R, r, u + u_step, v + v_step), 0) * rotation_z,

glm::vec4(this->make_point(R, r, u, v + v_step), 0) * rotation_z,

glm::vec4(this->make_point(R, r, u - u_step, v), 0) * rotation_z

};

this->face.addVertices(vertices);

this->line.addVertices(vertices);

for (int k = 0; k < vertices.size(); k++) {

this->face.addColor(ofColor(color, 138));

this->line.addColor(color);

}

auto index = this->face.getVertices().size() - 1; // 末尾の番地

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

this->face.addIndex(index); this->face.addIndex(index - 3); this->face.addIndex(index - 1);

this->line.addIndex(index - 3); this->line.addIndex(index - 2);

this->line.addIndex(index); this->line.addIndex(index - 1);

u += u_step;

}

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

void ofApp::draw() {

this->cam.begin();

this->face.draw();

this->line.draw();

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/Insta20210915

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