private void AddInstancedSpirals(int xCount, int yCount, int spiralLength)
{
double circleRadius = 10;
int spiralCircles = spiralLength / 20; // One circle in the spiral is created from 20 lines
var spiralPositions = CreateSpiralPositions(startPosition: new Point3D(0, 0, 0),
circleXDirection: new Vector3D(1, 0, 0),
circleYDirection: new Vector3D(0, 1, 0),
oneSpiralCircleDirection: new Vector3D(0, 0, -10),
circleRadius: circleRadius,
segmentsPerCircle: 20,
circles: spiralCircles);
var spiralPositionCollection = new Point3DCollection(spiralPositions);
double xStart = -xCount * circleRadius * 3 / 2;
double yStart = -yCount * circleRadius * 3 / 2;
MainViewport.BeginInit();
MainViewport.Children.Clear();
var materialGroup = new MaterialGroup();
materialGroup.Children.Add(new DiffuseMaterial(Brushes.Black));
materialGroup.Children.Add(new EmissiveMaterial(Brushes.White));
for (int x = 0; x < xCount; x++)
{
for (int y = 0; y < yCount; y++)
{
// PERFORMANCE NOTICE:
// The AddSpiralVisual3D creates one PolyLineVisual3D for each sphere.
// When creating many PolyLineVisual3D objects, the performance would be significantly improved if instead of many PolyLineVisual3D objects,
// all the spheres would be rendered with only one MultiPolyLineVisual3D.
// This would allow rendering all the 3D lines with only one draw call.
var instancedMeshGeometryVisual3D = AddInstancedTubePath(spiralPositionCollection, Color4.White);
instancedMeshGeometryVisual3D.Transform = new TranslateTransform3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0);
//var tubePathVisual3D = new TubePathVisual3D()
//{
// PathPositions = spiralPositionCollection,
// Radius = 2,
// Segments = 8,
// GenerateTextureCoordinates = false,
//};
//tubePathVisual3D.Material = materialGroup;
//tubePathVisual3D.Transform = new TranslateTransform3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0);
//MainViewport.Children.Add(tubePathVisual3D);
}
}
MainViewport.EndInit();
}
// This method uses standard Ab3d.PowerToys TubePathVisual3D to create tube paths
private void AddSpirals_TubePathVisual3D(int xCount, int yCount, int spiralLength)
{
float circleRadius = 10;
int spiralCircles = spiralLength / 20; // One circle in the spiral is created from 20 lines
double xStart = -xCount * circleRadius * 1.5;
double yStart = -yCount * circleRadius * 1.5;
MainViewport.BeginInit();
MainViewport.Children.Clear();
var materialGroup = new MaterialGroup();
materialGroup.Children.Add(new DiffuseMaterial(Brushes.Black));
materialGroup.Children.Add(new EmissiveMaterial(Brushes.White));
for (int x = 0; x < xCount; x++)
{
for (int y = 0; y < yCount; y++)
{
var spiralPositions = CreateSpiralPositions(startPosition: new Point3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0),
circleXDirection: new Vector3D(1, 0, 0),
circleYDirection: new Vector3D(0, 1, 0),
oneSpiralCircleDirection: new Vector3D(0, 0, -10),
circleRadius: circleRadius,
segmentsPerCircle: 20,
circles: spiralCircles);
var tubePathVisual3D = new TubePathVisual3D()
{
PathPositions = new Point3DCollection(spiralPositions),
Radius = 2,
Segments = 8,
GenerateTextureCoordinates = false,
};
tubePathVisual3D.Material = materialGroup;
//tubePathVisual3D.Transform = new TranslateTransform3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0);
MainViewport.Children.Add(tubePathVisual3D);
}
}
MainViewport.EndInit();
}
private void AddSpirals(int xCount, int yCount, int spiralLength)
{
double circleRadius = 10;
int spiralCircles = spiralLength / 20; // One circle in the spiral is created from 20 lines
var spiralPositions = CreateSpiralPositions(startPosition: new Point3D(0, 0, 0),
circleXDirection: new Vector3D(1, 0, 0),
circleYDirection: new Vector3D(0, 1, 0),
oneSpiralCircleDirection: new Vector3D(0, 0, -10),
circleRadius: circleRadius,
segmentsPerCircle: 20,
circles: spiralCircles);
var spiralPositionCollection = new Point3DCollection(spiralPositions);
double xStart = -xCount * circleRadius * 3 / 2;
double yStart = -yCount * circleRadius * 3 / 2;
MainViewport.BeginInit();
MainViewport.Children.Clear();
for (int x = 0; x < xCount; x++)
{
for (int y = 0; y < yCount; y++)
{
// PERFORMANCE NOTICE:
// The AddSpiralVisual3D creates one PolyLineVisual3D for each sphere.
// When creating many PolyLineVisual3D objects, the performance would be significantly improved if instead of many PolyLineVisual3D objects,
// all the spheres would be rendered with only one MultiPolyLineVisual3D.
// This would allow rendering all the 3D lines with only one draw call.
AddSpiralVisual3D(spiralPositionCollection, new TranslateTransform3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0));
}
}
MainViewport.EndInit();
}
// This method uses low level DXEngine objects to create tube paths.
private void AddSpirals_MeshObjectNode(int xCount, int yCount, int spiralLength, bool useMultiThreading)
{
float circleRadius = 10;
int spiralCircles = spiralLength / 20; // One circle in the spiral is created from 20 lines
var dxMaterial = new Ab3d.DirectX.Materials.StandardMaterial()
{
DiffuseColor = Color3.Black,
EmissiveColor = Color3.White,
Effect = _solidColorEffect
};
_disposables.Add(dxMaterial);
float xStart = -xCount * circleRadius * 1.5f;
float yStart = -yCount * circleRadius * 1.5f;
if (useMultiThreading)
{
// On i7 6700 with 4 cores with hyper-threading the multi-threaded code path is almost 100% faster then single threaded solution.
var initializedMeshes = new MeshBase[xCount, yCount];
var dxDevice = MainDXViewportView.DXScene.DXDevice;
Parallel.For(0, xCount * yCount, xy =>
{
int x = (int)xy / yCount;
int y = (int)xy % yCount;
var spiralPositions = CreateSpiralPositions(startPosition: new Vector3(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0),
circleXDirection: new Vector3(1, 0, 0),
circleYDirection: new Vector3(0, 1, 0),
oneSpiralCircleDirection: new Vector3(0, 0, -10),
circleRadius: circleRadius,
segmentsPerCircle: 20,
circles: spiralCircles);
MeshBase tubePathMesh = CreateTubePathMesh(spiralPositions, radius: 1.0f, segmentsCount: 8, isTubeClosed: true, tubeColor: Color4.White);
// Create DirectX resources in the background thread (this creates buffers on the GPU and send data there from the main memory)
tubePathMesh.InitializeResources(dxDevice);
// Save the mesh
initializedMeshes[x, y] = tubePathMesh;
});
// Now most of the work was done in multi-threaded way.
// So we only need to create the MeshObjectNode and add that to the Scene. This needs to be done on the UI thread.
MainViewport.BeginInit();
MainViewport.Children.Clear();
for (int x = 0; x < xCount; x++)
{
for (int y = 0; y < yCount; y++)
{
var tubePathMesh = initializedMeshes[x, y];
var meshObjectNode = new Ab3d.DirectX.MeshObjectNode(tubePathMesh, dxMaterial);
var tubePathVisual3D = new SceneNodeVisual3D(meshObjectNode);
// IMPORTANT:
//
// In this performance demo we create new spiral positions and new tubePathMesh for each spiral.
// But because the spirals are the same, we could create only one spiral positions and one tubePathMesh
// and then use that tubePathMesh to create multiple MeshObjectNode and SceneNodeVisual3D objects
// each of them with its Transform property set - as shown in the line below.
//
// Sharing one mesh would provide much better performance and lower memory usage,
// but for this demo we want to simulate cration of huge tube paths in the background thread.
//
//tubePathVisual3D.Transform = new TranslateTransform3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0);
_disposables.Add(tubePathMesh); // We did not add that in the background thread (we would need locking for that) so we need to do that now
_disposables.Add(meshObjectNode);
MainViewport.Children.Add(tubePathVisual3D);
}
}
MainViewport.EndInit();
}
else
{
// No multi-threading
MainViewport.BeginInit();
MainViewport.Children.Clear();
for (int x = 0; x < xCount; x++)
{
for (int y = 0; y < yCount; y++)
{
var spiralPositions2 = CreateSpiralPositions(startPosition: new Point3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0),
circleXDirection: new Vector3D(1, 0, 0),
circleYDirection: new Vector3D(0, 1, 0),
oneSpiralCircleDirection: new Vector3D(0, 0, -10),
circleRadius: circleRadius,
segmentsPerCircle: 20,
circles: spiralCircles);
var spiralPositions = spiralPositions2.Select(p => p.ToVector3()).ToArray();
//var spiralPositions = CreateSpiralPositions(startPosition: new Vector3(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0),
// circleXDirection: new Vector3(1, 0, 0),
// circleYDirection: new Vector3(0, 1, 0),
// oneSpiralCircleDirection: new Vector3(0, 0, -10),
// circleRadius: circleRadius,
// segmentsPerCircle: 20,
// circles: spiralCircles);
var tubePathMesh = CreateTubePathMesh(spiralPositions, radius: 2, segmentsCount: 8, isTubeClosed: true, tubeColor: Color4.White);
var meshObjectNode = new Ab3d.DirectX.MeshObjectNode(tubePathMesh, dxMaterial);
var tubePathVisual3D = new SceneNodeVisual3D(meshObjectNode);
//tubePathVisual3D.Transform = new TranslateTransform3D(x * circleRadius * 3 + xStart, y * circleRadius * 3 + yStart, 0);
_disposables.Add(meshObjectNode);
MainViewport.Children.Add(tubePathVisual3D);
}
}
MainViewport.EndInit();
}
}
