// ######################## FUNCTIONALITY ######################## //
private void UpdateVolumes()
{
foreach (Object t in targets)
{
ClipVolume v = t as ClipVolume;
v.UpdateShaderValues();
}
}
/// <summary>
/// Funkce pro obnoveni obrazu
/// </summary>
public void UpdateLook()
{
if (GraphicCore.GetInitializator().IsDeviceLost())
{
return;
}
matrixProjection = Matrix.PerspectiveFovLH((float)(Math.PI / 4f), (float)dev.PresentationParameters.DeviceWindow.Width / (float)dev.PresentationParameters.DeviceWindow.Height, 5f, farDistance);
matrixView = Matrix.LookAtLH(position, lookAt, up);
matrixViewProjection = matrixView * matrixProjection;
clipVolume = ComputeClipVolume();
}
/// <summary>
/// Funkce pocitaci orezavaci roviny
/// </summary>
/// <returns>Vraci strukturu s popisem orezavacich rovin</returns>
private ClipVolume ComputeClipVolume()
{
ClipVolume clvol = new ClipVolume();
Matrix multiply = Matrix.Multiply(matrixView, matrixProjection);
//Near plane
clvol.pNear.A = multiply.M14 + multiply.M13;
clvol.pNear.B = multiply.M24 + multiply.M23;
clvol.pNear.C = multiply.M34 + multiply.M33;
clvol.pNear.D = multiply.M44 + multiply.M43;
clvol.pNear.Normalize();
//Far plane
clvol.pFar.A = multiply.M14 - multiply.M13;
clvol.pFar.B = multiply.M24 - multiply.M23;
clvol.pFar.C = multiply.M34 - multiply.M33;
clvol.pFar.D = multiply.M44 - multiply.M43;
clvol.pFar.Normalize();
//Left plane
clvol.pLeft.A = multiply.M14 + multiply.M11;
clvol.pLeft.B = multiply.M24 + multiply.M21;
clvol.pLeft.C = multiply.M34 + multiply.M31;
clvol.pLeft.D = multiply.M44 + multiply.M41;
clvol.pLeft.Normalize();
//Right plane
clvol.pRight.A = multiply.M14 - multiply.M11;
clvol.pRight.B = multiply.M24 - multiply.M21;
clvol.pRight.C = multiply.M34 - multiply.M31;
clvol.pRight.D = multiply.M44 - multiply.M41;
clvol.pRight.Normalize();
//Top plane
clvol.pTop.A = multiply.M14 - multiply.M12;
clvol.pTop.B = multiply.M24 - multiply.M22;
clvol.pTop.C = multiply.M34 - multiply.M32;
clvol.pTop.D = multiply.M44 - multiply.M42;
clvol.pTop.Normalize();
//Bottom plane
clvol.pBottom.A = multiply.M14 + multiply.M12;
clvol.pBottom.B = multiply.M24 + multiply.M22;
clvol.pBottom.C = multiply.M34 + multiply.M32;
clvol.pBottom.D = multiply.M44 + multiply.M42;
clvol.pBottom.Normalize();
return(clvol);
}
public bool ComputeVisibility(ISceneCamera camera)
{
if (camera == null)
{
this.visible = true;
return(true);
}
ClipVolume cv = camera.GetClipVolume();
Plane[] p = new Plane[] { cv.pNear, cv.pFar, cv.pLeft, cv.pRight, cv.pTop, cv.pBottom };
for (int k = 0; k < p.Length; k++)
{
if (p[k].Dot(this.boundingSphereCenter) + this.radius < 0)
{
this.visible = false;
return(this.visible);
}
}
this.visible = true;
return(this.visible);
}
