Client/Source/Phy2DLite/Body.cpp


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#include "Body.h"
#include "Constants.h"

using namespace Phy2D;

Body::Body()
{
    position.Set(_0, _0);
    rotation = _0;
    velocity.Set(_0, _0);
    angularVelocity = _0;
    force.Set(_0, _0);
    torque = _0;
    friction = _0_2;

    width.Set(_1, _1);
    mass = NUMBER_MAX;
    invMass = _0;
    I = NUMBER_MAX;
    invI = _0;
}

void Body::Set(const Vec2& w, number m)
{
    position.Set(_0, _0);
    rotation = _0;
    velocity.Set(_0, _0);
    angularVelocity = _0;
    force.Set(_0, _0);
    torque = _0;
    friction = _0_2;

    width = w;
    mass = m;

    if (mass < NUMBER_MAX)
    {
        invMass = (number)_1 / mass;
        I = mass * (width.x * width.x + width.y * width.y) / _12;
        invI = (number)_1 / I;
    }
    else
    {
        invMass = _0;
        I = NUMBER_MAX;
        invI = _0;
    }
}