Client/Source/Phy2D/Dynamic/Body.cpp


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#include "Body.h"

using namespace Phy2D;

Body::Body()
{
    position.Set(0.0f, 0.0f);
    rotation = 0.0f;
    velocity.Set(0.0f, 0.0f);
    angularVelocity = 0.0f;
    force.Set(0.0f, 0.0f);
    torque = 0.0f;
    friction = 0.2f;

    width.Set(1.0f, 1.0f);
    mass = NUMBER_MAX;
    invMass = 0.0f;
    I = NUMBER_MAX;
    invI = 0.0f;
}

void Body::Set(const Vec2& w, number m)
{
    position.Set(0.0f, 0.0f);
    rotation = 0.0f;
    velocity.Set(0.0f, 0.0f);
    angularVelocity = 0.0f;
    force.Set(0.0f, 0.0f);
    torque = 0.0f;
    friction = 0.2f;

    width = w;
    mass = m;

    if (mass < NUMBER_MAX)
    {
        invMass = (number)1.0f / mass;
        I = mass * (width.x * width.x + width.y * width.y) / 12.0f;
        invI = (number)1.0f / I;
    }
    else
    {
        invMass = 0.0f;
        I = NUMBER_MAX;
        invI = 0.0f;
    }
}