box2d – ページ 15 – プログラミング de 落描き

2018年8月1日2018年8月1日

Cross mark. openFrameworks

[ Video ]

[ About ]
コーディング中に変数の値を間違えて出来た産物

I mistook the value of the variable. But it feels nice.

[ Source ]

#pragma once
#include "ofMain.h"
#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 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) {};

	ofxBox2d box2d;
	float range;
	float radius; 
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<ofColor> circles_color;
};

#pragma once

#include "ofMain.h"

#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 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) {};

ofxBox2d box2d;

float range;

float radius;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<ofColor> circles_color;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofSetWindowTitle("Insta");

	ofBackground(39);
	ofSetLineWidth(3);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

	this->radius = 12;
	this->range = 1000; // I made mistake of value. But I like it.

	for (int i = 0; i < 128; i++) {

		this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
		this->circles.back().get()->setPhysics(0.5, 0.5, 0.1);
		this->circles.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->radius);

		ofColor color;
		color.setHsb(ofRandom(255), 255, 255);
		this->circles_color.push_back(color);
	}
}

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

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

		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < this->range) {

				this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));
				this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));
			}
		}
	}

	this->box2d.update();
}

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

	for (int i = 0; i < this->circles.size(); i++) {
		
		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < this->range) {

				ofSetColor(this->circles_color[i], 10);
				ofDrawLine(this->circles[i]->getPosition(), this->circles[j]->getPosition());

				ofSetColor(this->circles_color[j], 10);
				ofDrawLine(this->circles[i]->getPosition(), this->circles[j]->getPosition());
			}
		}
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("Insta");

ofBackground(39);

ofSetLineWidth(3);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

this->radius = 12;

this->range = 1000; // I made mistake of value. But I like it.

for (int i = 0; i < 128; i++) {

this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));

this->circles.back().get()->setPhysics(0.5, 0.5, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->radius);

ofColor color;

color.setHsb(ofRandom(255), 255, 255);

this->circles_color.push_back(color);

}

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

void ofApp::update() {

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

for (int j = i + 1; j < this->circles.size(); j++) {

float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());

if (distance < this->range) {

this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));

this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));

}

this->box2d.update();

}

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

void ofApp::draw() {

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

for (int j = i + 1; j < this->circles.size(); j++) {

float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());

if (distance < this->range) {

ofSetColor(this->circles_color[i], 10);

ofDrawLine(this->circles[i]->getPosition(), this->circles[j]->getPosition());

ofSetColor(this->circles_color[j], 10);

ofDrawLine(this->circles[i]->getPosition(), this->circles[j]->getPosition());

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180801

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2018年7月31日2018年7月31日

Particle repel each other. openframeworks

[ Video ]

[ About ]
お互いに反発するパーティクル。
数字は反発関係にあるパーティクルの個数で変化します。

Particle repel each other.
Number on particle is count of repel particles.

[ Source ]

#pragma once
#include "ofMain.h"
#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 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) {};

	ofxBox2d box2d;
	float range;
	float radius; 
	int font_size;
	ofTrueTypeFont font;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<int> near_count;
};

#pragma once

#include "ofMain.h"

#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 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) {};

ofxBox2d box2d;

float range;

float radius;

int font_size;

ofTrueTypeFont font;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<int> near_count;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofSetWindowTitle("Insta");

	ofBackground(239);
	ofSetLineWidth(3);

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

	this->radius = 12;
	this->range = 50;
	this->font_size = this->radius;
	this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true);

	for (int i = 0; i < 192; i++) {

		this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
		this->circles.back().get()->setPhysics(1.5, 0.5, 0.1);
		this->circles.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->radius);

		this->near_count.push_back(0);
	}
}

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

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

		this->near_count[i] = 0;
	}

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

		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < this->range) {

				this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));
				this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));

				this->near_count[i]++;
				this->near_count[j]++;
			}
		}
	}

	this->box2d.update();
}

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

	for (int i = 0; i < this->circles.size(); i++) {
		
		ofSetColor(39);
		ofDrawCircle(this->circles[i].get()->getPosition(), this->radius);

		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < this->range) {

				ofDrawLine(this->circles[i]->getPosition(), this->circles[j]->getPosition());
			}
		}

		ofSetColor(239);
		this->font.drawString(std::to_string(this->near_count[i]), this->circles[i].get()->getPosition().x - this->font_size * 0.5 , this->circles[i].get()->getPosition().y + this->font_size * 0.5);
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("Insta");

ofBackground(239);

ofSetLineWidth(3);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

this->radius = 12;

this->range = 50;

this->font_size = this->radius;

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

for (int i = 0; i < 192; i++) {

this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));

this->circles.back().get()->setPhysics(1.5, 0.5, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->radius);

this->near_count.push_back(0);

}

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

void ofApp::update() {

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

this->near_count[i] = 0;

}

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

for (int j = i + 1; j < this->circles.size(); j++) {

float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());

if (distance < this->range) {

this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));

this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, 0, this->range, 1.2, 0.1));

this->near_count[i]++;

this->near_count[j]++;

}

this->box2d.update();

}

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

void ofApp::draw() {

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

ofSetColor(39);

ofDrawCircle(this->circles[i].get()->getPosition(), this->radius);

for (int j = i + 1; j < this->circles.size(); j++) {

float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());

if (distance < this->range) {

ofDrawLine(this->circles[i]->getPosition(), this->circles[j]->getPosition());

}

ofSetColor(239);

this->font.drawString(std::to_string(this->near_count[i]), this->circles[i].get()->getPosition().x - this->font_size * 0.5 , this->circles[i].get()->getPosition().y + this->font_size * 0.5);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180731

[ほしいものリスト]
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2018年7月30日2018年7月30日

Particle fireworks. openframeworks

[ Video ]

[ About ]
パーティクル花火2018

particle fireworks 2018.

[ Source ]

#pragma once
#include "ofMain.h"
#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 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) {};

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<float> circles_life;
};

#pragma once

#include "ofMain.h"

#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 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) {};

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<float> circles_life;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofSetWindowTitle("Insta");

	ofBackground(239);
	ofSetLineWidth(3);

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

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

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

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

			this->circles[i].get()->destroy();
			this->circles.erase(this->circles.begin() + i);
			this->circles_life.erase(this->circles_life.begin() + i);
		}
	}
	this->box2d.update();
}

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

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

		ofSetColor(39, this->circles_life[i]);
		ofDrawCircle(this->circles[i].get()->getPosition(), 4);
		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i].get()->getPosition().distance(this->circles[j].get()->getPosition());
			if (distance < 50) {

				ofDrawLine(this->circles[i].get()->getPosition(), this->circles[j].get()->getPosition());
				ofSetColor(39, this->circles_life[j]);
				ofDrawLine(this->circles[i].get()->getPosition(), this->circles[j].get()->getPosition());
			}
		}
	}
}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button) {

	int color_base = ofRandom(256);
	float radius = 10;
	for (int i = 0; i < 3; i++) {

		int color_value = (color_base + i * 20) % 255;
		for (int deg = 0; deg < 360; deg += 10) {

			float tmp_x = radius * cos(deg * DEG_TO_RAD);
			float tmp_y = radius * sin(deg * DEG_TO_RAD);

			this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
			this->circles.back().get()->setPhysics(3.0, 0.5, 0.1);
			this->circles.back().get()->setup(this->box2d.getWorld(), ofGetWidth() * 0.5 + tmp_x, ofGetHeight() * 0.5 + tmp_y, 4);
			this->circles.back().get()->addForce(ofVec2f(tmp_x, tmp_y), 8.0);

			this->circles_life.push_back(255);
		}

		radius += 3;
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("Insta");

ofBackground(239);

ofSetLineWidth(3);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

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

this->circles_life[i] -= 3;

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

this->circles[i].get()->destroy();

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

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

}

this->box2d.update();

}

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

void ofApp::draw() {

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

ofSetColor(39, this->circles_life[i]);

ofDrawCircle(this->circles[i].get()->getPosition(), 4);

for (int j = i + 1; j < this->circles.size(); j++) {

float distance = this->circles[i].get()->getPosition().distance(this->circles[j].get()->getPosition());

if (distance < 50) {

ofDrawLine(this->circles[i].get()->getPosition(), this->circles[j].get()->getPosition());

ofSetColor(39, this->circles_life[j]);

ofDrawLine(this->circles[i].get()->getPosition(), this->circles[j].get()->getPosition());

}

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

void ofApp::mousePressed(int x, int y, int button) {

int color_base = ofRandom(256);

float radius = 10;

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

int color_value = (color_base + i * 20) % 255;

for (int deg = 0; deg < 360; deg += 10) {

float tmp_x = radius * cos(deg * DEG_TO_RAD);

float tmp_y = radius * sin(deg * DEG_TO_RAD);

this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));

this->circles.back().get()->setPhysics(3.0, 0.5, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), ofGetWidth() * 0.5 + tmp_x, ofGetHeight() * 0.5 + tmp_y, 4);

this->circles.back().get()->addForce(ofVec2f(tmp_x, tmp_y), 8.0);

this->circles_life.push_back(255);

}

radius += 3;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180730

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