public void BuildMeshFromGeometry(
BufferUsageHint bufferUsageHint,
NormalStyle normalStyle,
VertexFormat vertexFormat
)
{
if (Geometry.PolygonAttributes.Contains <Vector3>("polygon_normals") == false)
{
Geometry.ComputePolygonNormals();
}
Geometry.ComputePointNormals("point_normals_smooth");
if (Geometry.PointAttributes.Contains <Vector3>("polygon_centroids") == false)
{
Geometry.ComputePolygonCentroids();
}
var polygonIdsVector3 = Geometry.PolygonAttributes.FindOrCreate <Vector3>("polygon_ids_vec3");
var polygonIdsUInt32 = (RenderStack.Graphics.Configuration.useIntegerPolygonIDs)
? Geometry.PolygonAttributes.FindOrCreate <UInt32>("polygon_ids_uint")
: null;
Dictionary <Corner, Vector3> cornerNormals = null;
Dictionary <Point, Vector3> pointNormals = null;
Dictionary <Point, Vector3> pointNormalsSmooth = Geometry.PointAttributes.Find <Vector3>("point_normals_smooth");
bool normalsFound = false;
if (Geometry.CornerAttributes.Contains <Vector3>("corner_normals"))
{
cornerNormals = Geometry.CornerAttributes.Find <Vector3>("corner_normals");
normalsFound = true;
}
if (Geometry.PointAttributes.Contains <Vector3>("point_normals"))
{
pointNormals = Geometry.PointAttributes.Find <Vector3>("point_normals");
normalsFound = true;
}
if (normalsFound == false)
{
//Geometry.ComputeCornerNormals(0.0f * (float)System.Math.PI);
Geometry.SmoothNormalize("corner_normals", "polygon_normals", (0.0f * (float)System.Math.PI));
cornerNormals = Geometry.CornerAttributes.Find <Vector3>("corner_normals");
}
Dictionary <Corner, Vector2> cornerTexcoords = null;
Dictionary <Point, Vector2> pointTexcoords = null;
if (Geometry.CornerAttributes.Contains <Vector2>("corner_texcoords"))
{
cornerTexcoords = Geometry.CornerAttributes.Find <Vector2>("corner_texcoords");
}
if (Geometry.PointAttributes.Contains <Vector2>("point_texcoords"))
{
pointTexcoords = Geometry.PointAttributes.Find <Vector2>("point_texcoords");
}
//Dictionary<Corner, Vector4> cornerColors = null;
var cornerColors = default(Dictionary <Corner, Vector4>);
Dictionary <Point, Vector4> pointColors = null;
if (Geometry.CornerAttributes.Contains <Vector4>("corner_colors"))
{
cornerColors = Geometry.CornerAttributes.Find <Vector4>("corner_colors");
}
if (Geometry.PointAttributes.Contains <Vector4>("point_colors"))
{
pointColors = Geometry.PointAttributes.Find <Vector4>("point_colors");
}
var polygonNormals = Geometry.PolygonAttributes.Find <Vector3>("polygon_normals");
var polygonCentroids = Geometry.PolygonAttributes.Find <Vector3>("polygon_centroids");
var pointLocations = Geometry.PointAttributes.Find <Vector3>("point_locations");
var cornerIndices = Geometry.CornerAttributes.FindOrCreate <uint>("corner_indices");
var attributePosition = vertexFormat.FindAttribute(VertexUsage.Position, 0);
var attributeNormal = vertexFormat.FindAttribute(VertexUsage.Normal, 0); /* content normals */
var attributeNormalFlat = vertexFormat.FindAttribute(VertexUsage.Normal, 1); /* flat normals */
var attributeNormalSmooth = vertexFormat.FindAttribute(VertexUsage.Normal, 2); /* smooth normals */
var attributeColor = vertexFormat.FindAttribute(VertexUsage.Color, 0);
var attributeTexcoord = vertexFormat.FindAttribute(VertexUsage.TexCoord, 0);
var attributeIdVec3 = vertexFormat.FindAttribute(VertexUsage.Id, 0);
var attributeIdUInt = vertexFormat.FindAttribute(VertexUsage.Id, 0);
// \note work in progress
GetMesh = new Mesh();
IBuffer vertexBuffer = BufferPool.Instance.GetVertexBuffer(vertexFormat, bufferUsageHint);
GetMesh.VertexBufferRange = vertexBuffer.CreateVertexBufferRange();
IBuffer indexBuffer = BufferPool.Instance.GetIndexBuffer(DrawElementsType.UnsignedInt, bufferUsageHint);
#region prepare index buffers
var polygonFillIndices = GetMesh.FindOrCreateIndexBufferRange(
MeshMode.PolygonFill,
indexBuffer,
BeginMode.Triangles
);
var edgeLineIndices = GetMesh.FindOrCreateIndexBufferRange(
MeshMode.EdgeLines,
indexBuffer,
BeginMode.Lines
);
/*BufferRange silhouetteLineIndices = GetMesh.FindOrCreateIndexBuffer(
* MeshMode.EdgeLines,
* indexBuffer,
* BeginMode.Lines
* );*/
var cornerPointIndices = GetMesh.FindOrCreateIndexBufferRange(
MeshMode.CornerPoints,
indexBuffer,
BeginMode.Points
);
var polygonCentroidIndices = GetMesh.FindOrCreateIndexBufferRange(
MeshMode.PolygonCentroids,
indexBuffer,
BeginMode.Points
);
#endregion prepare index buffers
var vertexWriter = new VertexBufferWriter(GetMesh.VertexBufferRange);
var polygonFillIndexWriter = new IndexBufferWriter(polygonFillIndices);
var edgeLineIndexWriter = new IndexBufferWriter(edgeLineIndices);
var cornerPointIndexWriter = new IndexBufferWriter(cornerPointIndices);
var polygonCentroidIndexWriter = new IndexBufferWriter(polygonCentroidIndices);
vertexWriter.BeginEdit();
polygonFillIndexWriter.BeginEdit();
edgeLineIndexWriter.BeginEdit();
cornerPointIndexWriter.BeginEdit();
polygonCentroidIndexWriter.BeginEdit();
UInt32 polygonIndex = 0;
#region polygons
cornerIndices.Clear();
foreach (Polygon polygon in Geometry.Polygons)
{
if (RenderStack.Graphics.Configuration.useIntegerPolygonIDs)
{
polygonIdsUInt32[polygon] = polygonIndex;
}
polygonIdsVector3[polygon] = Vector3.Vector3FromUint(polygonIndex);
Vector3 polygonNormal = Vector3.UnitY;
if (polygon.Corners.Count > 2 && polygonNormals != null && polygonNormals.ContainsKey(polygon))
{
polygonNormal = polygonNormals[polygon];
}
uint firstIndex = vertexWriter.CurrentIndex;
uint previousIndex = firstIndex;
#region corners
foreach (Corner corner in polygon.Corners)
{
// Position
vertexWriter.Position(pointLocations[corner.Point]);
// Normal
Vector3 normal = Vector3.UnitY;
if (
(cornerNormals != null) &&
(polygon.Corners.Count > 2) &&
(cornerNormals.ContainsKey(corner) == true)
)
{
normal = cornerNormals[corner];
}
else if (pointNormals != null && pointNormals.ContainsKey(corner.Point))
{
normal = pointNormals[corner.Point];
}
else if (pointNormalsSmooth != null && pointNormalsSmooth.ContainsKey(corner.Point))
{
normal = pointNormalsSmooth[corner.Point];
}
Vector3 pointNormal = Vector3.UnitY;
if (pointNormals != null && pointNormals.ContainsKey(corner.Point))
{
pointNormal = pointNormals[corner.Point];
}
else if (pointNormalsSmooth != null && pointNormalsSmooth.ContainsKey(corner.Point))
{
pointNormal = pointNormalsSmooth[corner.Point];
}
switch (normalStyle)
{
case NormalStyle.CornerNormals: vertexWriter.Normal(normal); break;
case NormalStyle.PointNormals: vertexWriter.Normal(pointNormal); break;
case NormalStyle.PolygonNormals: vertexWriter.Normal(polygonNormal); break;
}
if (attributeNormalFlat != null)
{
vertexWriter.Set(attributeNormalFlat, polygonNormal);
}
if (attributeNormalSmooth != null)
{
vertexWriter.Set(attributeNormalSmooth, pointNormalsSmooth[corner.Point]);
}
// Texcoord
if (attributeTexcoord != null)
{
if (
(cornerTexcoords != null) &&
(cornerTexcoords.ContainsKey(corner) == true)
)
{
vertexWriter.Set(attributeTexcoord, cornerTexcoords[corner]);
}
else if (
(pointTexcoords != null) &&
(pointTexcoords.ContainsKey(corner.Point) == true)
)
{
vertexWriter.Set(attributeTexcoord, pointTexcoords[corner.Point]);
}
}
// Vertex Color
if (attributeColor != null)
{
if (
(cornerColors != null) &&
(cornerColors.ContainsKey(corner) == true)
)
{
vertexWriter.Set(attributeColor, cornerColors[corner]);
}
else if (
(pointColors != null) &&
(pointColors.ContainsKey(corner.Point) == true)
)
{
vertexWriter.Set(attributeColor, pointColors[corner.Point]);
}
else
{
vertexWriter.Set(attributeColor, Vector4.One);
}
}
// PolygonId
if (RenderStack.Graphics.Configuration.useIntegerPolygonIDs && (attributeIdUInt != null))
{
vertexWriter.Set(attributeIdUInt, polygonIndex);
}
if (attributeIdVec3 != null)
{
Vector3 v = Vector3.Vector3FromUint(polygonIndex);
vertexWriter.Set(attributeIdVec3, v);
}
cornerPointIndexWriter.Point(vertexWriter.CurrentIndex);
cornerPointIndexWriter.CurrentIndex++;
cornerIndices[corner] = vertexWriter.CurrentIndex;
if (previousIndex != firstIndex)
{
polygonFillIndexWriter.Triangle(firstIndex, vertexWriter.CurrentIndex, previousIndex);
polygonFillIndexWriter.CurrentIndex += 3;
}
previousIndex = vertexWriter.CurrentIndex;
++vertexWriter.CurrentIndex;
}
#endregion corners
++polygonIndex;
}
#endregion polygons
#region edges
Geometry.BuildEdges();
foreach (Edge edge in Geometry.Edges.Keys)
{
if (
cornerIndices.ContainsKey(edge.A.Corners[0]) &&
cornerIndices.ContainsKey(edge.B.Corners[0])
)
{
uint i0 = cornerIndices[edge.A.Corners[0]];
uint i1 = cornerIndices[edge.B.Corners[0]];
edgeLineIndexWriter.Line(i0, i1);
edgeLineIndexWriter.CurrentIndex += 2;
}
}
#endregion edges
#region polygon centroids
foreach (Polygon polygon in Geometry.Polygons)
{
Vector3 normal;
if (polygon.Corners.Count > 2)
{
normal = polygonNormals[polygon];
}
else
{
normal = new Vector3(0.0f, 1.0f, 0.0f);
}
vertexWriter.Position(polygonCentroids[polygon]);
if (attributeNormal != null)
{
vertexWriter.Set(attributeNormal, normal);
}
if (attributeNormalFlat != null)
{
vertexWriter.Set(attributeNormalFlat, normal);
}
polygonCentroidIndexWriter.Point(vertexWriter.CurrentIndex);
++vertexWriter.CurrentIndex;
++polygonCentroidIndexWriter.CurrentIndex;
}
#endregion polygon centroids
vertexWriter.EndEdit();
polygonFillIndexWriter.EndEdit();
edgeLineIndexWriter.EndEdit();
cornerPointIndexWriter.EndEdit();
polygonCentroidIndexWriter.EndEdit();
}