private void AddGeometryToSceneNode(Geometry geometry, float3 position)
{
Geometry newGeo = geometry.CloneGeometry();
newGeo.Triangulate();
JometriMesh geometryMesh = new JometriMesh(newGeo);
SceneNode sceneNodeContainer = new SceneNode {
Components = new List <SceneComponent>()
};
Mesh meshComponent = new Mesh
{
Vertices = geometryMesh.Vertices,
Triangles = geometryMesh.Triangles,
Normals = geometryMesh.Normals,
};
Transform translationComponent = new Transform
{
Rotation = float3.Zero,
Scale = new float3(1, 1, 1),
Translation = position
};
sceneNodeContainer.Components.Add(translationComponent);
sceneNodeContainer.Components.Add(MakeEffect.FromDiffuseSpecular(_defaultColor, float4.Zero));
sceneNodeContainer.Components.Add(meshComponent);
_parentNode.Children.Add(sceneNodeContainer);
_activeGeometrys.Add(_parentNode.Children.IndexOf(sceneNodeContainer), geometry);
}
private void AddGeometryToSceneNode(Geometry geometry, float3 position)
{
Geometry newGeo = geometry.CloneGeometry();
newGeo.Triangulate();
var geometryMesh = new JometriMesh(newGeo);
var sceneNodeContainer = new SceneNode {
Components = new List <SceneComponent>()
};
var meshComponent = new Mesh
{
Vertices = geometryMesh.Vertices,
Triangles = geometryMesh.Triangles,
Normals = geometryMesh.Normals,
};
var translationComponent = new Transform
{
Rotation = float3.Zero,
Scale = new float3(1, 1, 1),
Translation = position
};
var shaderEffect = ShaderCodeBuilder.Default;
shaderEffect.SetEffectParam(UniformNameDeclarations.AlbedoColor, _defaultColor);
sceneNodeContainer.Components.Add(translationComponent);
sceneNodeContainer.Components.Add(shaderEffect);
sceneNodeContainer.Components.Add(meshComponent);
_parentNode.Children.Add(sceneNodeContainer);
_activeGeometrys.Add(_parentNode.Children.IndexOf(sceneNodeContainer), geometry);
}
private static void CreateTopSurface(Geometry geometry, float zOffset, bool exturdeAlongNormal)
{
//Clone front face.
var backface = geometry.CloneGeometry();
if (!exturdeAlongNormal)
{
//Add zOffset to each vertex coordinate.
UpdateVertexZCoord(backface, zOffset);
}
else
{
var unbounded = backface.GetFaceVertices(1).ToList();
var normal = GeometricOperations.CalculateFaceNormal(unbounded);
UpdateVertexZCoord(backface, unbounded, normal, zOffset);
}
Join2DGeometries(geometry, backface);
}
private void AddGeometryToSceneNode(Geometry geometry, float3 position)
{
Geometry newGeo = geometry.CloneGeometry();
newGeo.Triangulate();
var geometryMesh = new JometriMesh(newGeo);
var sceneNodeContainer = new SceneNodeContainer {
Components = new List <SceneComponentContainer>()
};
var meshComponent = new Mesh
{
Vertices = geometryMesh.Vertices,
Triangles = geometryMesh.Triangles,
Normals = geometryMesh.Normals,
};
var translationComponent = new TransformComponent
{
Rotation = float3.Zero,
Scale = new float3(1, 1, 1),
Translation = position
};
var materialComponent = new MaterialComponent
{
Diffuse = new MatChannelContainer(),
Specular = new SpecularChannelContainer(),
};
materialComponent.Diffuse.Color = _defaultColor;
sceneNodeContainer.Components.Add(translationComponent);
sceneNodeContainer.Components.Add(materialComponent);
sceneNodeContainer.Components.Add(meshComponent);
_parentNode.Children.Add(sceneNodeContainer);
_activeGeometrys.Add(_parentNode.Children.IndexOf(sceneNodeContainer), geometry);
}
/// <summary>
/// Performs a Catmull-Clark Subdivision-Surface algorithm on a given geometry which is stored as DCEL.
/// </summary>
/// <param name="geometry">The geometry to perform the SD on.</param>
/// <returns>A smoother geometry with </returns>
public static Geometry CatmullClarkSubdivision(Geometry geometry)
{
//initializing
var newGeometry = geometry.CloneGeometry();
//computes all Face Vertices and all Edge Vertices
var allFaceVertices = GetFaceVertices(geometry);
var allEdgeVertices = GetEdgeVertices(geometry, allFaceVertices);
//Calculates the new position of existing Vertices
var allVertices = newGeometry.GetAllVertices().ToList();
foreach (var vertex in allVertices)
{
var outgoingEdges = newGeometry.GetVertexStartingHalfEdges(vertex.Handle).ToList();
//Get average of all face Points and average of all edge Points
var faceVertices = new List <Vertex>();
var edgeVertices = new List <Vertex>();
foreach (var edge in outgoingEdges)
{
var twin = geometry.GetHalfEdgeByHandle(edge.TwinHalfEdge);
if (allFaceVertices.ContainsKey(edge.IncidentFace))
{
faceVertices.Add(allFaceVertices[edge.IncidentFace]);
}
else
{
faceVertices.Add(allFaceVertices[twin.IncidentFace]);
}
if (allEdgeVertices.ContainsKey(edge.Handle))
{
edgeVertices.Add(allEdgeVertices[edge.Handle]);
}
else
{
edgeVertices.Add(allEdgeVertices[twin.Handle]);
}
}
var meanEdgeVertexPos = GeometricOperations.GetVerticesMeanPos(edgeVertices);
var meanFaceVertexPos = GeometricOperations.GetVerticesMeanPos(faceVertices);
float edgeCount = outgoingEdges.Count;
var newVertexPos = (meanFaceVertexPos + 2 * meanEdgeVertexPos + (edgeCount - 3) * vertex.VertData.Pos) / edgeCount;
var newVertex = new Vertex(vertex.Handle, newVertexPos)
{
IncidentHalfEdge = vertex.IncidentHalfEdge
};
newGeometry.ReplaceVertex(newVertex);
}
//adds newly calculated Edge Vertices
var allEdges = geometry.GetAllHalfEdges();
var doneHe = new int[allEdges.Count() + 1];
foreach (var edge in allEdges)
{
if (doneHe[edge.Handle] == edge.TwinHalfEdge)
{
continue;
}
var vertexOld1 = edge.OriginVertex;
var twinEdge = geometry.GetHalfEdgeByHandle(edge.TwinHalfEdge);
var vertexOld2 = twinEdge.OriginVertex;
//find correct Edge Vertex
Vertex edgeVertex;
if (allEdgeVertices.ContainsKey(edge.Handle))
{
edgeVertex = allEdgeVertices[edge.Handle];
}
else
{
edgeVertex = allEdgeVertices[twinEdge.Handle];
}
newGeometry.InsertVertex(vertexOld1, vertexOld2, edgeVertex.VertData.Pos);
doneHe[edge.TwinHalfEdge] = edge.Handle;
}
newGeometry.SetHighestHandles();
geometry = newGeometry.CloneGeometry();
//creates the new quad faces and connects everything
AddFaceVerticesAndNewFaces(geometry, newGeometry, allFaceVertices);
return(newGeometry);
}
private void InteractionHandler()
{
//Add new Geometry
if (Keyboard.GetKey(KeyCodes.D1) && _keyTimeout < 0)
{
_keyTimeout = 1;
Geometry geometry = CreatePrimitiveGeometry.CreateCuboidGeometry(1, 1, 1);
AddGeometryToSceneNode(geometry, new float3(0, 0, 0));
}
if (Keyboard.GetKey(KeyCodes.D2) && _keyTimeout < 0)
{
_keyTimeout = 1;
Geometry geometry = CreatePrimitiveGeometry.CreatePyramidGeometry(1, 1, 1);
AddGeometryToSceneNode(geometry, new float3(0, 0, 0));
}
if (Keyboard.GetKey(KeyCodes.D3) && _keyTimeout < 0)
{
_keyTimeout = 1;
Geometry geometry = CreatePrimitiveGeometry.CreateConeGeometry(1, 1, 15);
AddGeometryToSceneNode(geometry, new float3(0, 0, 0));
}
if (Keyboard.GetKey(KeyCodes.D4) && _keyTimeout < 0)
{
_keyTimeout = 1;
Geometry geometry = CreatePrimitiveGeometry.CreateSpehreGeometry(1, 30, 15);
AddGeometryToSceneNode(geometry, new float3(0, 0, 0));
}
_keyTimeout -= DeltaTime;
//following actions are only allowed if something is selected
if (_selectedNode == null)
{
return;
}
//Translate Geometry
if (Keyboard.GetKey(KeyCodes.G))
{
_isTranslating = true;
}
if (_isTranslating)
{
float3 worldPos = new float3(Mouse.Velocity.x * .0001f, Mouse.Velocity.y * -.0001f, Mouse.WheelVel * .001f);
_selectedNode.GetTransform().Translation += worldPos.xyz;
if (Mouse.LeftButton)
{
_isTranslating = false;
}
}
//Scaling Geometry
if (Keyboard.GetKey(KeyCodes.S))
{
_isScaling = true;
}
if (_isScaling)
{
_selectedNode.GetTransform().Scale += new float3(Mouse.Velocity.y, Mouse.Velocity.y, Mouse.Velocity.y) * .0001f;
if (Mouse.LeftButton)
{
_isScaling = false;
}
}
//DeleteGeom
if (Keyboard.GetKey(KeyCodes.Delete) && _keyTimeout < 0)
{
_keyTimeout = 1;
int currentGeometryIndex = _parentNode.Children.IndexOf(_selectedNode);
_activeGeometrys.Remove(currentGeometryIndex);
Dictionary <int, Geometry> zwerg = new Dictionary <int, Geometry>();
foreach (int key in _activeGeometrys.Keys)
{
if (key > currentGeometryIndex)
{
Geometry test = _activeGeometrys[key];
zwerg.Add(key - 1, test);
}
else
{
zwerg.Add(key, _activeGeometrys[key]);
}
}
_activeGeometrys.Clear();
foreach (KeyValuePair <int, Geometry> item in zwerg)
{
_activeGeometrys.Add(item.Key, item.Value);
}
_parentNode.Children.RemoveAt(currentGeometryIndex);
_selectedNode = null;
_currentPick = null;
}
//Insert
if (Keyboard.GetKey(KeyCodes.I) && _keyTimeout < 0)
{
_keyTimeout = .25f;
int currentGeometryIndex = _parentNode.Children.IndexOf(_selectedNode);
SceneNode currentSelection = _parentNode.Children[currentGeometryIndex];
Geometry currentSelectedGeometry = _activeGeometrys[currentGeometryIndex];
currentSelectedGeometry.InsetFace(rng.Next(4, currentSelectedGeometry.GetAllFaces().Count()), .5f);
Geometry copy = currentSelectedGeometry.CloneGeometry();
_activeGeometrys[currentGeometryIndex] = copy;
currentSelectedGeometry.Triangulate();
JometriMesh geometryMesh = new JometriMesh(currentSelectedGeometry);
Mesh meshComponent = new Mesh
{
Vertices = geometryMesh.Vertices,
Triangles = geometryMesh.Triangles,
Normals = geometryMesh.Normals,
};
currentSelection.Components[2] = meshComponent;
}
//Extrude
if (Keyboard.GetKey(KeyCodes.E) && _keyTimeout < 0)
{
_keyTimeout = .25f;
int currentGeometryIndex = _parentNode.Children.IndexOf(_selectedNode);
SceneNode currentSelection = _parentNode.Children[currentGeometryIndex];
Geometry currentSelectedGeometry = _activeGeometrys[currentGeometryIndex];
currentSelectedGeometry.ExtrudeFace(rng.Next(4, currentSelectedGeometry.GetAllFaces().Count()), 1);
Geometry copy = currentSelectedGeometry.CloneGeometry();
_activeGeometrys[currentGeometryIndex] = copy;
currentSelectedGeometry.Triangulate();
JometriMesh geometryMesh = new JometriMesh(currentSelectedGeometry);
Mesh meshComponent = new Mesh
{
Vertices = geometryMesh.Vertices,
Triangles = geometryMesh.Triangles,
Normals = geometryMesh.Normals,
};
currentSelection.Components[2] = meshComponent;
}
//Add Catmull-Clark
if (Keyboard.GetKey(KeyCodes.C) && _keyTimeout < 0)
{
_keyTimeout = .25f;
int currentGeometryIndex = _parentNode.Children.IndexOf(_selectedNode);
SceneNode currentSelection = _parentNode.Children[currentGeometryIndex];
Geometry currentSelectedGeometry = _activeGeometrys[currentGeometryIndex];
currentSelectedGeometry = SubdivisionSurface.CatmullClarkSubdivision(currentSelectedGeometry);
Geometry copy = currentSelectedGeometry.CloneGeometry();
_activeGeometrys[currentGeometryIndex] = copy;
currentSelectedGeometry.Triangulate();
JometriMesh geometryMesh = new JometriMesh(currentSelectedGeometry);
Mesh meshComponent = new Mesh
{
Vertices = geometryMesh.Vertices,
Triangles = geometryMesh.Triangles,
Normals = geometryMesh.Normals,
};
currentSelection.Components[2] = meshComponent;
}
}