box2d – ページ 21 – プログラミング de 落描き

2017年10月27日

Insta20171026

[ Video ]

[ About ]
指の動きに反応してPaticleが生成されます。

particle creation by finger velocity.

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.h"

// Leap Motion SDK
#include "Leap.h"
#pragma comment(lib, "Leap.lib")

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) {};

	ofEasyCam cam;

	// Box2d
	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<ofColor> circles_color;
	vector<float> circles_life;

	// Leap Motion
	Leap::Controller leap;
};

#pragma once

#include "ofMain.h"

#include "ofxBox2d.h"

// Leap Motion SDK

#include "Leap.h"

#pragma comment(lib, "Leap.lib")

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) {};

ofEasyCam cam;

// Box2d

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<ofColor> circles_color;

vector<float> circles_life;

// Leap Motion

Leap::Controller leap;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofBackground(0);
	ofSetWindowTitle("Insta");

	ofSetCircleResolution(60);

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

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

	Leap::Frame frame = leap.frame();
	for (Leap::Hand hand : frame.hands()) {
		for (Leap::Finger finger : hand.fingers()) {
			ofVec2f velocity = ofVec2f(finger.tipVelocity().x, -finger.tipVelocity().y);
			if (velocity.length() > 250) {
				this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
				this->circles.back().get()->setPhysics(3.0, 0.53, 0.1);
				this->circles.back().get()->setup(this->box2d.getWorld(), finger.tipPosition().x + ofGetWidth() / 2, ofGetHeight() / 2 - finger.tipPosition().y, 8);
				this->circles.back().get()->addForce(velocity, 1.0);

				ofColor line_color;
				line_color.setHsb(ofGetFrameNum() % 255, 255, 255);
				this->circles_color.push_back(line_color);

				this->circles_life.push_back(255);
			}
		}
	}

	this->box2d.update();

	for (int i = 0; i < this->circles.size(); i++) {
		if (this->circles_life[i] < 0) {
			this->circles[i].get()->destroy();
			this->circles.erase(this->circles.begin() + i);
			this->circles_color.erase(this->circles_color.begin() + i);
			this->circles_life.erase(this->circles_life.begin() + i);
		}
	}
}

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

	for (int i = 0; i < this->circles.size(); i++) {
		ofSetColor(this->circles_color[i], this->circles_life[i]);
		ofDrawCircle(this->circles[i].get()->getPosition(), 8);
		this->circles_life[i] -= 2.f;
	}
}

//--------------------------------------------------------------
int main() {
	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(0);

ofSetWindowTitle("Insta");

ofSetCircleResolution(60);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

Leap::Frame frame = leap.frame();

for (Leap::Hand hand : frame.hands()) {

for (Leap::Finger finger : hand.fingers()) {

ofVec2f velocity = ofVec2f(finger.tipVelocity().x, -finger.tipVelocity().y);

if (velocity.length() > 250) {

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

this->circles.back().get()->setPhysics(3.0, 0.53, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), finger.tipPosition().x + ofGetWidth() / 2, ofGetHeight() / 2 - finger.tipPosition().y, 8);

this->circles.back().get()->addForce(velocity, 1.0);

ofColor line_color;

line_color.setHsb(ofGetFrameNum() % 255, 255, 255);

this->circles_color.push_back(line_color);

this->circles_life.push_back(255);

}

this->box2d.update();

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

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

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

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

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

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

}

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

void ofApp::draw() {

ofFill();

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

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

ofDrawCircle(this->circles[i].get()->getPosition(), 8);

this->circles_life[i] -= 2.f;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20171026.git

[ほしいものリスト]
Amazon

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2017年10月26日2017年12月5日

Insta20171025

[ Video ]

[ About ]
Box2dを使って物理演算をしています。
内部では文字列の大きさに合わせて四角を生成しています。

[ 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) {};

	ofTrueTypeFont font;
	std::string moji;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dRect>> rects;
	ofxBox2dEdge eage;
};

#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) {};

ofTrueTypeFont font;

std::string moji;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dRect>> rects;

ofxBox2dEdge eage;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofBackground(255);
	ofSetWindowTitle("Insta");

	ofSetColor(0);
	ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

	this->font.loadFont("fonts/Kazesawa-Bold.ttf", 50);
	this->moji = "ABCDEFGHIJKLMNOPQRSTUVWXYZ!?";

	this->box2d.init();
	this->box2d.setGravity(0, 10);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();
	
	for (int i = 0; i < this->moji.size(); i++) {
		this->rects.push_back(shared_ptr<ofxBox2dRect>(new ofxBox2dRect));
		this->rects.back().get()->setPhysics(3.0, 0.2, 0.1);
		this->rects.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->font.stringWidth(this->moji.substr(i, 1)), this->font.stringHeight(this->moji.substr(i, 1)));
	}
	
	this->eage = ofxBox2dEdge();
	this->eage.addVertex(ofVec2f(200, ofGetHeight() / 2));
	this->eage.addVertex(ofVec2f(ofGetWidth() - 200, ofGetHeight() / 2));
	this->eage.create(this->box2d.getWorld());
}

//--------------------------------------------------------------
void ofApp::update() {
	this->box2d.update();
}

//--------------------------------------------------------------
void ofApp::draw() {
	for (int i = 0; i < this->moji.size(); i++) {
		ofPushMatrix();
		ofTranslate(this->rects[i].get()->getPosition().x, this->rects[i].get()->getPosition().y);
		ofRotate(this->rects[i].get()->getRotation());
		this->font.drawString((this->moji.substr(i, 1)), -this->font.stringWidth(this->moji.substr(i, 1)) / 2, this->font.stringHeight(this->moji.substr(i, 1)) / 2);
		ofPopMatrix();
	}
	this->eage.draw();
}

//--------------------------------------------------------------
int main() {
	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(255);

ofSetWindowTitle("Insta");

ofSetColor(0);

ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

this->font.loadFont("fonts/Kazesawa-Bold.ttf", 50);

this->moji = "ABCDEFGHIJKLMNOPQRSTUVWXYZ!?";

this->box2d.init();

this->box2d.setGravity(0, 10);

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

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

this->rects.push_back(shared_ptr<ofxBox2dRect>(new ofxBox2dRect));

this->rects.back().get()->setPhysics(3.0, 0.2, 0.1);

this->rects.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->font.stringWidth(this->moji.substr(i, 1)), this->font.stringHeight(this->moji.substr(i, 1)));

}

this->eage = ofxBox2dEdge();

this->eage.addVertex(ofVec2f(200, ofGetHeight() / 2));

this->eage.addVertex(ofVec2f(ofGetWidth() - 200, ofGetHeight() / 2));

this->eage.create(this->box2d.getWorld());

}

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

void ofApp::update() {

this->box2d.update();

}

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

void ofApp::draw() {

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

ofPushMatrix();

ofTranslate(this->rects[i].get()->getPosition().x, this->rects[i].get()->getPosition().y);

ofRotate(this->rects[i].get()->getRotation());

this->font.drawString((this->moji.substr(i, 1)), -this->font.stringWidth(this->moji.substr(i, 1)) / 2, this->font.stringHeight(this->moji.substr(i, 1)) / 2);

ofPopMatrix();

}

this->eage.draw();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20171025

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2017年10月24日

Insta20171023

[ Video ]

[ About ]
SurfacePen(mouse)の加速度がオブジェクトに反映されます。

[ 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) {};

	ofEasyCam cam;
	
	ofxBox2d box2d;

	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<ofColor> circles_color;
	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) {};

ofEasyCam cam;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<ofColor> circles_color;

vector<float> circles_life;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofBackground(0);
	ofSetWindowTitle("Insta");

	ofSetCircleResolution(60);

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

//--------------------------------------------------------------
void ofApp::update() {
	if (ofGetMousePressed()) {
		ofVec2f mouse_position = ofVec2f(ofGetMouseX(), ofGetMouseY());
		ofVec2f prev_mouse_position = ofVec2f(ofGetPreviousMouseX(), ofGetPreviousMouseY());
		ofVec2f difference = mouse_position - prev_mouse_position;

		for (int i = 0; i < 10; i++) {
			this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
			this->circles.back().get()->setPhysics(3.0, 0.53, 0.1);
			this->circles.back().get()->setup(this->box2d.getWorld(), mouse_position.x, mouse_position.y, 5);
			this->circles.back().get()->addForce(difference, 20.0);

			ofColor line_color;
			line_color.setHsb(ofGetFrameNum() % 255, 255, 255);
			this->circles_color.push_back(line_color);

			this->circles_life.push_back(255);
		}
	}

	this->box2d.update();

	for (int i = 0; i < this->circles.size(); i++) {
		if (this->circles_life[i] < 0) {
			this->circles[i].get()->destroy();
			this->circles.erase(this->circles.begin() + i);
			this->circles_color.erase(this->circles_color.begin() + i);
			this->circles_life.erase(this->circles_life.begin() + i);
		}
	}
}

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

	for (int i = 0; i < this->circles.size(); i++) {
		ofSetColor(this->circles_color[i], this->circles_life[i]);
		//this->circles[i].get()->draw();
		ofDrawCircle(this->circles[i].get()->getPosition(), 5);
		this->circles_life[i] -= 1.5f;
	}
}

//--------------------------------------------------------------
int main() {
	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(0);

ofSetWindowTitle("Insta");

ofSetCircleResolution(60);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

if (ofGetMousePressed()) {

ofVec2f mouse_position = ofVec2f(ofGetMouseX(), ofGetMouseY());

ofVec2f prev_mouse_position = ofVec2f(ofGetPreviousMouseX(), ofGetPreviousMouseY());

ofVec2f difference = mouse_position - prev_mouse_position;

for (int i = 0; i < 10; i++) {

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

this->circles.back().get()->setPhysics(3.0, 0.53, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), mouse_position.x, mouse_position.y, 5);

this->circles.back().get()->addForce(difference, 20.0);

ofColor line_color;

line_color.setHsb(ofGetFrameNum() % 255, 255, 255);

this->circles_color.push_back(line_color);

this->circles_life.push_back(255);

}

this->box2d.update();

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

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

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

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

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

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

}

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

void ofApp::draw() {

ofFill();

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

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

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

ofDrawCircle(this->circles[i].get()->getPosition(), 5);

this->circles_life[i] -= 1.5f;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20171023

[ほしいものリスト]
Amazon

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