Element(const Vec2 x[3])
{
Vec2 e1 = x[1]-x[0];
Vec2 e2 = x[2]-x[0];
Vec2 e3 = x[2]-x[1];
Matrix22 m(e1, e2);
float det;
mInvDm = Inverse(m, det);
assert(det > 0.0f);
mB[0] = PerpCCW(e3);
mB[1] = PerpCW(e2);
mB[2] = PerpCCW(e1);
printf("mInvDm:\n");
Print(mInvDm);
printf("mB:\n");
printf("%f, %f\n", mB[0].x, mB[0].y);
printf("%f, %f\n", mB[1].x, mB[1].y);
printf("%f, %f\n", mB[2].x, mB[2].y);
}
void EnemyShip::changeVelocity(const float& dt, Engine::ParticleSystem& system)
{
if (target != nullptr)
{
Vector2 toTarget = target->getPosition() - shipPosition;
if (LengthSquared(toTarget) != 0)
{
Vector2 normalizedtoTarget = PerpCCW(Normalized(toTarget));
shipRotation = atan2f(normalizedtoTarget.getY(), normalizedtoTarget.getX());
if (LengthSquared(toTarget) >= 0)
{
velocity = velocity + (Engine::Matrix2::rotation(shipRotation) * Engine::Vector2(0, -(acceleration * dt) * dt));
system.AddParticle(new THRUSTPARTICLEUP);
}
else
{
velocity = velocity + (Engine::Matrix2::rotation(shipRotation) * Engine::Vector2(0, (acceleration * dt) * dt));
system.AddParticle(new THRUSTPARTICLEDOWN);
}
}
}
}
