Method Update

GTE/Graphics/BlendTransformController.cpp:28–107

}

bool BlendTransformController::Update(double applicationTime)
{
    if (!Controller::Update(applicationTime))
    {
        return false;
    }

    mController0->Update(applicationTime);
    mController1->Update(applicationTime);

    Transform<float> const& xfrm0 = mController0->GetTransform();
    Transform<float> const& xfrm1 = mController1->GetTransform();
    float oneMinusWeight = 1.0f - mWeight;

    // Compute the blended translation.
    Vector4<float> trn0 = xfrm0.GetTranslationW1();
    Vector4<float> trn1 = xfrm1.GetTranslationW1();
    Vector4<float> blendTrn = oneMinusWeight * trn0 + mWeight * trn1;
    mLocalTransform.SetTranslation(blendTrn);

    // Compute the blended rotation.
    Matrix4x4<float> const& rot0 = xfrm0.GetRotation();
    Matrix4x4<float> const& rot1 = xfrm1.GetRotation();

    Quaternion<float> quat0 = Rotation<4, float>(rot0);
    Quaternion<float> quat1 = Rotation<4, float>(rot1);
    if (Dot(quat0, quat1) < 0.0f)
    {
        quat1 = -quat1;
    }

    Quaternion<float> blendQuat;
    if (mGeometricRotation)
    {
        blendQuat = Slerp(mWeight, quat0, quat1);
    }
    else
    {
        blendQuat = oneMinusWeight * quat0 + mWeight * quat1;
        Normalize(blendQuat);
    }

    Matrix4x4<float> blendRot = Rotation<4, float>(blendQuat);
    mLocalTransform.SetRotation(blendRot);

    // Compute the blended scale.
    Vector3<float> sca0 = xfrm0.GetScale();
    Vector3<float> sca1 = xfrm1.GetScale();
    Vector3<float> blendSca;
    if (mGeometricScale)
    {
        for (int32_t i = 0; i < 3; ++i)
        {
            float s0 = sca0[i], s1 = sca1[i];
            if (s0 != 0.0f && s1 != 0.0f)
            {
                float sign0 = (s0 > 0.0f ? 1.0f : -1.0f);
                float sign1 = (s1 > 0.0f ? 1.0f : -1.0f);