ofxBullet – ページ 2 – プログラミング de 落描き

2018年5月14日2018年5月15日

箱の中のSphere openFrameworks ofxBullet

[ Video ]

[ About ]
箱の中に閉じ込められている球体は、お互いに反発する力が働いており、一定の距離を保っています。今回は3次元の物理エンジンAddonであるofxBulletを0.10.0環境で動かしてみました。

[ Source ]

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

	ofCamera cam;
	ofxBulletWorldRigid world;

	unique_ptr<ofxBulletCustomShape> bounds_shape;
	vector<unique_ptr<ofxBulletSphere>> spheres;
	vector<ofColor> spheres_color;
};

#pragma once

#include "ofMain.h"

#include "ofxBullet.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) {};

ofCamera cam;

ofxBulletWorldRigid world;

unique_ptr<ofxBulletCustomShape> bounds_shape;

vector<unique_ptr<ofxBulletSphere>> spheres;

vector<ofColor> spheres_color;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofBackground(239);
	ofSetWindowTitle("Insta");

	ofEnableDepthTest();

	// Initialize ofxBulletWorld
	this->cam.setPosition(ofVec3f(0, 3.f, -30.f));
	this->cam.lookAt(ofVec3f(0, 0, 0), ofVec3f(0, -1, 0));
	this->world.setup();
	this->world.enableGrabbing();
	this->world.setCamera(&this->cam);
	this->world.setGravity(ofVec3f());

	// Create Big Box
	ofVec3f start_location;
	ofPoint dimens;
	float bounds_width = 400;
	float h_width = bounds_width * 0.5;
	float depth = 10.;
	float h_depth = depth * 0.5;
	this->bounds_shape.reset(new ofxBulletCustomShape());
	this->bounds_shape->create(world.world, ofVec3f(0, 0, 0), 10.);
	for (int i = 0; i < 6; i++) {
		if (i == 0) { // ground //
			start_location.set(0., h_width + h_depth, 0.);
			dimens.set(bounds_width, depth, bounds_width);
		}
		else if (i == 1) { // back wall //
			start_location.set(0, 0, h_width + h_depth);
			dimens.set(bounds_width, bounds_width, depth);
		}
		else if (i == 2) { // right wall //
			start_location.set(h_width + h_depth, 0, 0.);
			dimens.set(depth, bounds_width, bounds_width);
		}
		else if (i == 3) { // left wall //
			start_location.set(-h_width - h_depth, 0, 0.);
			dimens.set(depth, bounds_width, bounds_width);
		}
		else if (i == 4) { // ceiling //
			start_location.set(0, -h_width - h_depth, 0.);
			dimens.set(bounds_width, depth, bounds_width);
		}
		else if (i == 5) { // front wall //
			start_location.set(0, 0, -h_width - h_depth);
			dimens.set(bounds_width, bounds_width, depth);
		}
		btBoxShape* boxShape = ofBtGetBoxCollisionShape(dimens.x, dimens.y, dimens.z);
		this->bounds_shape->addShape(boxShape, start_location);
	}
	this->bounds_shape->add();

	// Create Spheres
	for (int i = 0; i < 100; i++) {

		unique_ptr<ofxBulletSphere> sphere(new ofxBulletSphere);
		float size = ofRandom(8, 30);
		sphere->create(this->world.world, ofVec3f(ofRandom(-100, 100), ofRandom(-100, 100), ofRandom(-100, 100)), 1, size);
		sphere->setRestitution(1.0);
		sphere->add();
		this->spheres.push_back(move(sphere));

		ofColor color;
		color.setHsb(ofRandom(255), 239, 239);
		this->spheres_color.push_back(color);
	}
}

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

	// Big Box Moving To Center 
	if (!ofGetMousePressed()) {

		ofVec3f diff = ofVec3f(0, 0, 0) - bounds_shape->getPosition();
		diff *= 500.f;
		bounds_shape->applyCentralForce(diff);
	}

	// Compute Spheres Relation
	for (int i = 0; i < this->spheres.size(); i++) {

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

			float distance = this->spheres[i]->getPosition().distance(this->spheres[j]->getPosition());
			if (distance < 100) {

				ofVec3f diff = this->spheres[i]->getPosition() - this->spheres[j]->getPosition();
				ofMap(distance, 0, 100, 40, 0);
				this->spheres[i]->applyCentralForce(diff);
				this->spheres[j]->applyCentralForce(-diff);
			}
		}
	}

	this->world.update();
}

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

	ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

	// Draw Big Box
	ofNoFill();
	if (ofGetMousePressed()) {

		ofSetColor(39, 39, 239);
	}
	else {

		ofSetColor(39);
	}
	bounds_shape->transformGL();
	ofDrawBox(ofVec3f(0, 0, 0), 400);
	bounds_shape->restoreTransformGL();

	// Draw Sphere
	ofFill();
	for (int i = 0; i < this->spheres.size(); i++) {
		
		ofSetColor(this->spheres_color[i]);
		ofDrawSphere(this->spheres[i]->getPosition(), this->spheres[i]->getRadius());
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(239);

ofSetWindowTitle("Insta");

ofEnableDepthTest();

// Initialize ofxBulletWorld

this->cam.setPosition(ofVec3f(0, 3.f, -30.f));

this->cam.lookAt(ofVec3f(0, 0, 0), ofVec3f(0, -1, 0));

this->world.setup();

this->world.enableGrabbing();

this->world.setCamera(&this->cam);

this->world.setGravity(ofVec3f());

// Create Big Box

ofVec3f start_location;

ofPoint dimens;

float bounds_width = 400;

float h_width = bounds_width * 0.5;

float depth = 10.;

float h_depth = depth * 0.5;

this->bounds_shape.reset(new ofxBulletCustomShape());

this->bounds_shape->create(world.world, ofVec3f(0, 0, 0), 10.);

for (int i = 0; i < 6; i++) {

if (i == 0) { // ground //

start_location.set(0., h_width + h_depth, 0.);

dimens.set(bounds_width, depth, bounds_width);

}

else if (i == 1) { // back wall //

start_location.set(0, 0, h_width + h_depth);

dimens.set(bounds_width, bounds_width, depth);

}

else if (i == 2) { // right wall //

start_location.set(h_width + h_depth, 0, 0.);

dimens.set(depth, bounds_width, bounds_width);

}

else if (i == 3) { // left wall //

start_location.set(-h_width - h_depth, 0, 0.);

dimens.set(depth, bounds_width, bounds_width);

}

else if (i == 4) { // ceiling //

start_location.set(0, -h_width - h_depth, 0.);

dimens.set(bounds_width, depth, bounds_width);

}

else if (i == 5) { // front wall //

start_location.set(0, 0, -h_width - h_depth);

dimens.set(bounds_width, bounds_width, depth);

}

btBoxShape* boxShape = ofBtGetBoxCollisionShape(dimens.x, dimens.y, dimens.z);

this->bounds_shape->addShape(boxShape, start_location);

}

this->bounds_shape->add();

// Create Spheres

for (int i = 0; i < 100; i++) {

unique_ptr<ofxBulletSphere> sphere(new ofxBulletSphere);

float size = ofRandom(8, 30);

sphere->create(this->world.world, ofVec3f(ofRandom(-100, 100), ofRandom(-100, 100), ofRandom(-100, 100)), 1, size);

sphere->setRestitution(1.0);

sphere->add();

this->spheres.push_back(move(sphere));

ofColor color;

color.setHsb(ofRandom(255), 239, 239);

this->spheres_color.push_back(color);

}

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

void ofApp::update() {

// Big Box Moving To Center

if (!ofGetMousePressed()) {

ofVec3f diff = ofVec3f(0, 0, 0) - bounds_shape->getPosition();

diff *= 500.f;

bounds_shape->applyCentralForce(diff);

}

// Compute Spheres Relation

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

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

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

if (distance < 100) {

ofVec3f diff = this->spheres[i]->getPosition() - this->spheres[j]->getPosition();

ofMap(distance, 0, 100, 40, 0);

this->spheres[i]->applyCentralForce(diff);

this->spheres[j]->applyCentralForce(-diff);

}

this->world.update();

}

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

void ofApp::draw() {

ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

// Draw Big Box

ofNoFill();

if (ofGetMousePressed()) {

ofSetColor(39, 39, 239);

}

else {

ofSetColor(39);

}

bounds_shape->transformGL();

ofDrawBox(ofVec3f(0, 0, 0), 400);

bounds_shape->restoreTransformGL();

// Draw Sphere

ofFill();

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

ofSetColor(this->spheres_color[i]);

ofDrawSphere(this->spheres[i]->getPosition(), this->spheres[i]->getRadius());

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180514

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2018年1月23日2018年1月22日

イラストをBoxの滝で描写 openFrameworks

[ Video ]

[ About ]
滝のようなBoxの流れを作って、それぞれの色をJPEGファイルからX, Y座標を元に拾ってきています。

本当は箱の中にBoxをため込んで最終的にイラストが見えるようなものにしたかったのですが、処理スピードの問題で断念しました。

[ Source ]

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

class ofApp : public ofBaseApp {

public:
	~ofApp();

	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;
	ofLight light;

	ofxBulletWorldRigid world;
	vector<ofxBulletBox*> boxes;

	ofImage img;
	ofPixels pixels;
};

#pragma once

#include "ofMain.h"

#include "ofxBullet.h"

class ofApp : public ofBaseApp {

public:

~ofApp();

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;

ofLight light;

ofxBulletWorldRigid world;

vector<ofxBulletBox*> boxes;

ofImage img;

ofPixels pixels;

};

#include "ofApp.h"

//--------------------------------------------------------------
ofApp::~ofApp() {
	for (ofxBulletBox* tmp : this->boxes) {
		delete tmp;
	}
	this->boxes.clear();
}

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

	this->world.setup();
	this->world.setGravity(ofVec3f(0.0, 64.0, 0));

	ofEnableLighting();
	this->light.enable();

	this->img.loadImage("he.jpg");
	this->pixels = this->img.getPixelsRef();
}

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

	for (int i = 0; i < 10; i++) {
		ofxBulletBox* box = new ofxBulletBox();
		float size = ofRandom(5, 15);
		box->create(this->world.world, ofVec3f(ofRandom(-256, 256), -300, 0), 1.0, size, size, size);
		box->setRestitution(0.5);
		box->add();

		this->boxes.push_back(box);
	}

	this->world.update();
}

//--------------------------------------------------------------
void ofApp::draw() {
	this->cam.begin();
	ofRotateX(180);
	
	this->light.setPosition(this->cam.getPosition());

	for (int i = this->boxes.size() - 1; i >= 0; i--) {
		
		if (this->boxes[i]->getPosition().y > ofGetHeight() / 2) {
			delete this->boxes[i];
			this->boxes.erase(this->boxes.begin() + i);
			continue;
		}

		int x = this->boxes[i]->getPosition().x + 256;
		int y = this->boxes[i]->getPosition().y + 256;

		if (x >= 0 && x < 512 && y >= 0 && y < 512) {
			ofSetColor(this->pixels.getColor(x, y));
			this->boxes[i]->draw();
		}

	}

	this->cam.end();
}

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

#include "ofApp.h"

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

ofApp::~ofApp() {

for (ofxBulletBox* tmp : this->boxes) {

delete tmp;

}

this->boxes.clear();

}

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

void ofApp::setup() {

ofSetFrameRate(60);

ofEnableDepthTest();

ofBackground(0);

ofSetWindowTitle("Insta");

this->world.setup();

this->world.setGravity(ofVec3f(0.0, 64.0, 0));

ofEnableLighting();

this->light.enable();

this->img.loadImage("he.jpg");

this->pixels = this->img.getPixelsRef();

}

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

void ofApp::update() {

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

ofxBulletBox* box = new ofxBulletBox();

float size = ofRandom(5, 15);

box->create(this->world.world, ofVec3f(ofRandom(-256, 256), -300, 0), 1.0, size, size, size);

box->setRestitution(0.5);

box->add();

this->boxes.push_back(box);

}

this->world.update();

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

this->light.setPosition(this->cam.getPosition());

for (int i = this->boxes.size() - 1; i >= 0; i--) {

if (this->boxes[i]->getPosition().y > ofGetHeight() / 2) {

delete this->boxes[i];

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

continue;

}

int x = this->boxes[i]->getPosition().x + 256;

int y = this->boxes[i]->getPosition().y + 256;

if (x >= 0 && x < 512 && y >= 0 && y < 512) {

ofSetColor(this->pixels.getColor(x, y));

this->boxes[i]->draw();

}

this->cam.end();

}

//========================================================================

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180122

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2018年1月19日2018年1月17日

グーで吸引・パーで反発 openFrameworks LeapMotion ofxBullet

[ Video ]

[ About ]
Leap Motionと連携しました。Leap::HandのgrabStrengthメソッドで取得した値によって吸引・反発を切り替えています。じゃんけんでいう、グーが吸引、パーが反発になっています。思ったより、グーで持ち上げてる感じや、パーで弾く感じが出て良かった。

両手で触るのが楽しかったので、いつもLeap Motionの撮影はスマートフォンでしていましたが、絵の中に手を描写してキャプチャしました。Unityなんかを使うともっと手っぽいポリゴン？な表現を使えるようなので、いつかマネしてみたいですね。

本当はSphereを小さくして数をもう少し増やしたかったのですが、Surface Pro 4だとこの辺が限界ですね。グラフィック関係を中心に開発環境もグレードアップしてみたいです。お小遣いが許さないですが…(涙

[ Source ]

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

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

class ofApp : public ofBaseApp {

public:
	~ofApp();

	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;
	ofLight light;

	ofxBulletWorldRigid world;
	vector < ofxBulletSphere*> spheres;
	vector<ofColor> spheres_color;
	vector<ofVec3f> spheres_location;

	// Leap Motion
	Leap::Controller leap;
	ofVec3f hand_position;
	void drawHand(Leap::Hand hand);
	void drawFinger(Leap::Finger finger);
};

#pragma once

#include "ofMain.h"

#include "ofxBullet.h"

// Leap Motion SDK

#include "Leap.h"

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

class ofApp : public ofBaseApp {

public:

~ofApp();

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;

ofLight light;

ofxBulletWorldRigid world;

vector < ofxBulletSphere*> spheres;

vector<ofColor> spheres_color;

vector<ofVec3f> spheres_location;

// Leap Motion

Leap::Controller leap;

ofVec3f hand_position;

void drawHand(Leap::Hand hand);

void drawFinger(Leap::Finger finger);

};

#include "ofApp.h"

//--------------------------------------------------------------
ofApp::~ofApp() {
	for (ofxBulletSphere* tmp : this->spheres) {
		delete tmp;
	}

	this->spheres.clear();
}

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

	this->world.setup();
	this->world.setGravity(ofVec3f(0.0, 0.0, 0.0));

	float size = 30;
	for (float x = -150; x < 150; x += size) {
		for (float y = -150; y < 150; y += size) {
			for (float z = -150; z < 150; z += size) {
				ofxBulletSphere* sphere = new ofxBulletSphere();
				sphere->create(this->world.world, ofVec3f(x, y, z), 1.0, size / 2);
				sphere->setRestitution(1.0);
				sphere->add();

				this->spheres.push_back(sphere);

				ofColor color;
				color.setHsb(ofRandom(255), 255, 255);
				this->spheres_color.push_back(color);
				this->spheres_location.push_back(ofVec3f(x, y, z));
			}
		}
	}

	this->light.setPosition(ofVec3f(0, 0, 512));
	ofEnableLighting();
	this->light.enable();

}

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

	ofVec3f diff;
	for (int i = 0; i < this->spheres.size(); i++) {
		diff = this->spheres_location[i] - this->spheres[i]->getPosition();
		diff *= 10;
		this->spheres[i]->applyCentralForce(diff);
	}

	Leap::Frame frame = this->leap.frame();
	for (Leap::Hand hand : frame.hands()) {
		this->hand_position = ofVec3f(hand.palmPosition().x, hand.palmPosition().y, hand.palmPosition().z);

		ofVec3f diff;
		for (int i = 0; i < this->spheres.size(); i++) {
			diff = this->hand_position - this->spheres[i]->getPosition();
			if (diff.length() < 150) {
				if (hand.grabStrength() > 0.5) {
					diff *= ofMap(diff.length(), 0, 300, 300, 0);
				} else {
					diff *= ofMap(diff.length(), 0, 150, -1024, 0);
				}
				this->spheres[i]->applyCentralForce(diff);
			}
		}
	}

	this->world.update();
}

//--------------------------------------------------------------
void ofApp::draw() {
	this->cam.begin();

	Leap::Frame frame = this->leap.frame();
	for (Leap::Hand hand : frame.hands()) {
		this->drawHand(hand);
	}

	float len = 50;
	for (int i = 0; i < this->spheres.size(); i++) {
		ofSetColor(this->spheres_color[i]);
		this->spheres[i]->draw();
	}

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::drawHand(Leap::Hand hand) {
	if (hand.grabStrength() < 0.5) {
		ofSetColor(255, 0, 0);
	} else {
		ofSetColor(0, 0, 255);
	}

	Leap::FingerList fingers = hand.fingers();
	for (int j = 0; j < fingers.count(); j++) {
		this->drawFinger(fingers[j]);
	}

	ofPushMatrix();
	ofVec3f palm_point = ofVec3f(hand.palmPosition().x, hand.palmPosition().y, hand.palmPosition().z);
	ofTranslate(palm_point);
	ofSphere(10);
	ofPopMatrix();
}

//--------------------------------------------------------------
void ofApp::drawFinger(Leap::Finger finger) {

	ofVec3f tip_point = ofVec3f(finger.tipPosition().x, finger.tipPosition().y, finger.tipPosition().z);
	ofPushMatrix();
	ofTranslate(tip_point);
	ofSphere(5);
	ofPopMatrix();

	ofVec3f base_point = ofVec3f(tip_point.x + finger.direction().x * finger.length(),// * -1,
		tip_point.y + finger.direction().y * finger.length() - 1,
		tip_point.z + finger.direction().z * finger.length() - 1);
	ofPushMatrix();
	ofTranslate(base_point);
	ofSphere(5);
	ofPopMatrix();

	ofLine(tip_point, base_point);
}

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

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#include "ofApp.h"

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

ofApp::~ofApp() {

for (ofxBulletSphere* tmp : this->spheres) {

delete tmp;

}

this->spheres.clear();

}

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

void ofApp::setup() {

ofSetFrameRate(60);

ofEnableDepthTest();

ofBackground(255);

ofSetWindowTitle("Insta");

this->world.setup();

this->world.setGravity(ofVec3f(0.0, 0.0, 0.0));

float size = 30;

for (float x = -150; x < 150; x += size) {

for (float y = -150; y < 150; y += size) {

for (float z = -150; z < 150; z += size) {

ofxBulletSphere* sphere = new ofxBulletSphere();

sphere->create(this->world.world, ofVec3f(x, y, z), 1.0, size / 2);

sphere->setRestitution(1.0);

sphere->add();

this->spheres.push_back(sphere);

ofColor color;

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

this->spheres_color.push_back(color);

this->spheres_location.push_back(ofVec3f(x, y, z));

}

this->light.setPosition(ofVec3f(0, 0, 512));

ofEnableLighting();

this->light.enable();

}

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

void ofApp::update() {

ofVec3f diff;

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

diff = this->spheres_location[i] - this->spheres[i]->getPosition();

diff *= 10;

this->spheres[i]->applyCentralForce(diff);

}

Leap::Frame frame = this->leap.frame();

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

this->hand_position = ofVec3f(hand.palmPosition().x, hand.palmPosition().y, hand.palmPosition().z);

ofVec3f diff;

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

diff = this->hand_position - this->spheres[i]->getPosition();

if (diff.length() < 150) {

if (hand.grabStrength() > 0.5) {

diff *= ofMap(diff.length(), 0, 300, 300, 0);

} else {

diff *= ofMap(diff.length(), 0, 150, -1024, 0);

}

this->spheres[i]->applyCentralForce(diff);

}

this->world.update();

}

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

void ofApp::draw() {

this->cam.begin();

Leap::Frame frame = this->leap.frame();

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

this->drawHand(hand);

}

float len = 50;

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

ofSetColor(this->spheres_color[i]);

this->spheres[i]->draw();

}

this->cam.end();

}

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

void ofApp::drawHand(Leap::Hand hand) {

if (hand.grabStrength() < 0.5) {

ofSetColor(255, 0, 0);

} else {

ofSetColor(0, 0, 255);

}

Leap::FingerList fingers = hand.fingers();

for (int j = 0; j < fingers.count(); j++) {

this->drawFinger(fingers[j]);

}

ofPushMatrix();

ofVec3f palm_point = ofVec3f(hand.palmPosition().x, hand.palmPosition().y, hand.palmPosition().z);

ofTranslate(palm_point);

ofSphere(10);

ofPopMatrix();

}

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

void ofApp::drawFinger(Leap::Finger finger) {

ofVec3f tip_point = ofVec3f(finger.tipPosition().x, finger.tipPosition().y, finger.tipPosition().z);

ofPushMatrix();

ofTranslate(tip_point);

ofSphere(5);

ofPopMatrix();

ofVec3f base_point = ofVec3f(tip_point.x + finger.direction().x * finger.length(),// * -1,

tip_point.y + finger.direction().y * finger.length() - 1,

tip_point.z + finger.direction().z * finger.length() - 1);

ofPushMatrix();

ofTranslate(base_point);

ofSphere(5);

ofPopMatrix();

ofLine(tip_point, base_point);

}

//========================================================================

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180118

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