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#include "simul/objet.h"
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Objet::Objet(b2World & world, Position p, Type type, Angle theta, QColor color) : p(p), type(type), theta(theta), world(&world), p_color(color)
{
b2BodyDef bodyDef;
bodyDef.type = b2_dynamicBody;
bodyDef.position.Set(p.x/100.,p.y/100.);
bodyDef.angle = theta;
body = world.CreateBody(&bodyDef);
if (type == glass )
{
b2CircleShape circle;
b2FixtureDef fixtureDef;
fixtureDef.shape = &circle;
circle.m_radius = 0.4f;
circle.m_p.Set(0.,0.);
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.4f;
fixtureDef.filter.maskBits = 0x3;
fixtureDef.filter.categoryBits = 0x1;
body->CreateFixture(&fixtureDef);
}
else if (type == gift )
{
b2Vec2 vertices[4];
vertices[0].Set(0.0f, -0.28f);
vertices[1].Set(0.0f, 0.0f);
vertices[2].Set(-1.5f, 0.0f);
vertices[3].Set(-1.5f, -0.28f);
int32 count = 4;
b2PolygonShape polygon;
polygon.Set(vertices, count);
b2FixtureDef fixtureDef;
fixtureDef.shape = &polygon;
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.4f;
fixtureDef.filter.maskBits = 0x3;
fixtureDef.filter.categoryBits = 0x1;
body->CreateFixture(&fixtureDef);
}
}
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Objet::~Objet()
{
world->DestroyBody(body);
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}
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void Objet::paint(QPainter &pa)
{
switch (type)
{
case glass:
{
pa.setBrush(p_color);
pa.setPen(p_color);
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pa.drawEllipse(QPoint(p.x,-p.y),40,-40);
break;
}
case gift:
{
pa.setBrush(p_color);
pa.setPen(p_color);
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pa.drawRect(p.x-75, -p.y+25,150,-50);
break;
}
default:
break;
}
return;
}
void Objet::updatePos()
{
p.x = 100*body->GetPosition().x;
p.y = 100*body->GetPosition().y;
theta = body->GetAngle()-3.14;
float friction = 0.5;
b2Vec2 velocity = body->GetLinearVelocity();
float32 speed = velocity.Length();
if(speed > FLT_EPSILON)
{
float32 newSpeed = speed - friction;
if(newSpeed < 0)
newSpeed = 0;
velocity *= newSpeed/speed;
body->SetLinearVelocity(velocity);
}
float angularFriction = 0.5;
float angular = body->GetAngularVelocity();
if(angular > 0)
{
angular -= angularFriction;
if(angular < 0)
angular = 0;
}
else
{
angular += angularFriction;
if(angular > 0)
angular = 0;
}
body->SetAngularVelocity(angular);
}