internal IEnumerable <SceneObjectBatch> GetBoundingVolumes(SceneGraphContext ctxScene)
{
GraphicsStateSet currentState = ctxScene.GraphicsStateStack.Current.Push();
TransformState sceneGeometryModel = (TransformState)currentState[TransformState.StateSetIndex];
Matrix4x4f viewModel = sceneGeometryModel.ModelView;
if (_GeometryInstances.Count > 0)
{
foreach (Geometry sceneObjectBatch in _GeometryInstances)
{
IBoundingVolume instanceVolume = sceneObjectBatch.BoundingVolume ?? _BoundingVolume;
if (instanceVolume != null && instanceVolume.IsClipped(ctxScene.ViewFrustumPlanes, viewModel))
{
continue;
}
GraphicsStateSet volumeState = currentState.Push();
SetBoundingVolumeState(instanceVolume, volumeState);
yield return(new SceneObjectBatch(
_BoundingVolumeArray,
volumeState,
_BoundingVolumeProgram
));
}
}
else
{
if (_BoundingVolume == null || _BoundingVolume.IsClipped(ctxScene.ViewFrustumPlanes, viewModel))
{
yield break;
}
GraphicsStateSet volumeState = currentState.Push();
SetBoundingVolumeState(_BoundingVolume, volumeState);
yield return(new SceneObjectBatch(_BoundingVolumeArray, volumeState, _BoundingVolumeProgram));
}
}
/// <summary>
/// Get all geometries compositing this SceneObjectGeometry, filtering them using view-frustum.
/// </summary>
/// <param name="currentState">
/// A <see cref="State.GraphicsStateSet"/> that specifies the current graphics state to be merged with
/// each returned geometry.
/// </param>
/// <param name="clippingPlanes">
///
/// </param>
/// <param name="viewModel">
///
/// </param>
/// <returns>
/// It returns a <see cref="IEnumerable{SceneObjectBatch}"/>.
/// </returns>
private IEnumerable <SceneObjectBatch> GetGeometriesViewFrustum(SceneGraphContext ctxScene)
{
GraphicsStateSet currentState = ctxScene.GraphicsStateStack.Current.Push();
TransformState sceneGeometryModel = (TransformState)currentState[TransformState.StateSetIndex];
Matrix4x4f viewModel = sceneGeometryModel.ModelView;
if (_GeometryInstances.Count > 0)
{
foreach (Geometry sceneObjectBatch in _GeometryInstances)
{
IBoundingVolume instanceVolume = sceneObjectBatch.BoundingVolume ?? _BoundingVolume;
if (instanceVolume != null && instanceVolume.IsClipped(ctxScene.ViewFrustumPlanes, viewModel))
{
continue;
}
GraphicsStateSet geometryState;
if (sceneObjectBatch.State != null)
{
geometryState = currentState.Push();
geometryState.Merge(sceneObjectBatch.State);
}
else
{
geometryState = currentState;
}
yield return(new SceneObjectBatch(
sceneObjectBatch.VertexArray ?? VertexArray,
geometryState,
sceneObjectBatch.Program ?? Program
));
}
}
else
{
if (_BoundingVolume != null && _BoundingVolume.IsClipped(ctxScene.ViewFrustumPlanes, viewModel))
{
yield break;
}
if (VertexArray == null)
{
yield break;
}
yield return(new SceneObjectBatch(VertexArray, currentState, Program));
}
}
/// <summary>
/// Get all geometries compositing this SceneObjectGeometry.
/// </summary>
/// <param name="currentState">
/// A <see cref="State.GraphicsStateSet"/> that specifies the current graphics state to be merged with
/// each returned geometry.
/// </param>
/// <returns>
/// It returns a <see cref="IEnumerable{SceneObjectBatch}"/>.
/// </returns>
private IEnumerable <SceneObjectBatch> GetGeometries(GraphicsStateSet currentState)
{
if (currentState == null)
{
throw new ArgumentNullException("currentState");
}
if (_GeometryInstances.Count > 0)
{
foreach (Geometry sceneObjectBatch in _GeometryInstances)
{
GraphicsStateSet geometryState;
if (sceneObjectBatch.State != null)
{
geometryState = currentState.Push();
geometryState.Merge(sceneObjectBatch.State);
}
else
{
geometryState = currentState;
}
yield return(new SceneObjectBatch(
sceneObjectBatch.VertexArray ?? VertexArray,
geometryState,
sceneObjectBatch.Program ?? Program
));
}
}
else
{
if (VertexArray == null)
{
yield break;
}
yield return(new SceneObjectBatch(VertexArray, currentState, Program));
}
}