/// <summary>
/// Builds the structures.
/// </summary>
public override VertexStructure BuildStructure(StructureBuildOptions buildOptions)
{
VertexStructure result = new VertexStructure();
// Calculate parameters
Vector3 firstCoordinate = new Vector3(
-((TilesX * TileWidth) / 2f),
0f,
-((TilesZ * TileWidth) / 2f));
float tileWidthX = this.TileWidth;
float tileWidthZ = this.TileWidth;
float fieldWidth = tileWidthX * TilesX;
float fieldDepth = tileWidthZ * TilesZ;
float fieldWidthHalf = fieldWidth / 2f;
float fieldDepthHalf = fieldDepth / 2f;
int tileMiddleX = (TilesX % 2 == 0) && (this.HighlightXZLines) ? this.TilesX / 2 : 1;
int tileMiddleZ = (TilesZ % 2 == 0) && (this.HighlightXZLines) ? this.TilesZ / 2 : 1;
// Define lower ground structure
if (this.GenerateGround)
{
VertexStructureSurface lowerGround = result.CreateSurface();
lowerGround.EnableTextureTileMode(new Vector2(TileWidth, TileWidth));
lowerGround.BuildRect4V(
new Vector3(-fieldWidthHalf, -0.01f, -fieldDepthHalf),
new Vector3(fieldWidthHalf, -0.01f, -fieldDepthHalf),
new Vector3(fieldWidthHalf, -0.01f, fieldDepthHalf),
new Vector3(-fieldWidthHalf, -0.01f, fieldDepthHalf),
new Vector3(0f, 1f, 0f),
this.GroundColor);
lowerGround.Material = this.GroundMaterial;
}
// Define line structures
VertexStructureSurface genStructureDefaultLine = result.CreateSurface();
VertexStructureSurface genStructureGroupLine = result.CreateSurface();
for (int actTileX = 0; actTileX < TilesX + 1; actTileX++)
{
Vector3 localStart = firstCoordinate + new Vector3(actTileX * tileWidthX, 0f, 0f);
Vector3 localEnd = localStart + new Vector3(0f, 0f, tileWidthZ * TilesZ);
Color4 actLineColor = this.LineColor;
float devider = actTileX % this.GroupTileCount == 0 ? this.LineSmallDevider : this.LineBigDevider;
if (this.HighlightXZLines && (actTileX == tileMiddleX))
{
actLineColor = this.ZLineHighlightColor;
devider = this.LineSmallDevider;
}
VertexStructureSurface targetStruture = actTileX % this.GroupTileCount == 0 ? genStructureGroupLine : genStructureDefaultLine;
targetStruture.BuildRect4V(
localStart - new Vector3(tileWidthX / devider, 0f, 0f),
localStart + new Vector3(tileWidthX / devider, 0f, 0f),
localEnd + new Vector3(tileWidthX / devider, 0f, 0f),
localEnd - new Vector3(tileWidthX / devider, 0f, 0f),
actLineColor);
if (this.BuildBackFaces)
{
targetStruture.BuildRect4V(
localEnd - new Vector3(tileWidthX / devider, 0f, 0f),
localEnd + new Vector3(tileWidthX / devider, 0f, 0f),
localStart + new Vector3(tileWidthX / devider, 0f, 0f),
localStart - new Vector3(tileWidthX / devider, 0f, 0f),
actLineColor);
}
}
for (int actTileZ = 0; actTileZ < TilesZ + 1; actTileZ++)
{
Vector3 localStart = firstCoordinate + new Vector3(0f, 0f, actTileZ * tileWidthZ);
Vector3 localEnd = localStart + new Vector3(tileWidthX * TilesX, 0f, 0f);
Color4 actLineColor = this.LineColor;
float devider = actTileZ % this.GroupTileCount == 0 ? this.LineSmallDevider : this.LineBigDevider;
if (this.HighlightXZLines && (actTileZ == tileMiddleZ))
{
actLineColor = this.XLineHighlightColor;
devider = this.LineSmallDevider;
}
VertexStructureSurface targetStruture = actTileZ % this.GroupTileCount == 0 ? genStructureGroupLine : genStructureDefaultLine;
targetStruture.BuildRect4V(
localStart + new Vector3(0f, 0f, tileWidthZ / devider),
localStart - new Vector3(0f, 0f, tileWidthZ / devider),
localEnd - new Vector3(0f, 0f, tileWidthZ / devider),
localEnd + new Vector3(0f, 0f, tileWidthZ / devider),
actLineColor);
if (this.BuildBackFaces)
{
targetStruture.BuildRect4V(
localEnd + new Vector3(0f, 0f, tileWidthZ / devider),
localEnd - new Vector3(0f, 0f, tileWidthZ / devider),
localStart - new Vector3(0f, 0f, tileWidthZ / devider),
localStart + new Vector3(0f, 0f, tileWidthZ / devider),
actLineColor);
}
}
genStructureDefaultLine.Material = this.LineMaterial;
genStructureGroupLine.Material = this.LineMaterial;
if (genStructureDefaultLine.CountTriangles == 0)
{
result.RemoveSurface(genStructureDefaultLine);
}
if (genStructureGroupLine.CountTriangles == 0)
{
result.RemoveSurface(genStructureGroupLine);
}
// Return all generated structures
return(result);
}
/// <summary>
/// Fills the given vertex structure using information from the given AC-File-Objects.
/// </summary>
/// <param name="objInfo">The object information from the AC file.</param>
/// <param name="acMaterials">A list containing all materials from the AC file.</param>
/// <param name="structure">The VertexStructure to be filled.</param>
/// <param name="transformStack">Current matrix stack (for stacked objects).</param>
private static void FillVertexStructure(VertexStructure structure, List <ACMaterialInfo> acMaterials, ACObjectInfo objInfo, Matrix4Stack transformStack)
{
List <Tuple <int, int> > standardShadedVertices = new List <Tuple <int, int> >();
transformStack.Push();
try
{
// Perform local transformation for the current AC object
transformStack.TransformLocal(objInfo.Rotation);
transformStack.TranslateLocal(objInfo.Translation);
// Build structures material by material
for (int actMaterialIndex = 0; actMaterialIndex < acMaterials.Count; actMaterialIndex++)
{
ACMaterialInfo actMaterial = acMaterials[actMaterialIndex];
VertexStructureSurface actStructSurface = structure.CreateOrGetExistingSurface(actMaterial.CreateMaterialProperties());
bool isNewSurface = actStructSurface.CountTriangles == 0;
// Create and configure vertex structure
actStructSurface.Material = NamedOrGenericKey.Empty;
actStructSurface.TextureKey = !string.IsNullOrEmpty(objInfo.Texture) ? new NamedOrGenericKey(objInfo.Texture) : NamedOrGenericKey.Empty;
actStructSurface.MaterialProperties.DiffuseColor = actMaterial.Diffuse;
actStructSurface.MaterialProperties.AmbientColor = actMaterial.Ambient;
actStructSurface.MaterialProperties.EmissiveColor = actMaterial.Emissive;
actStructSurface.MaterialProperties.Shininess = actMaterial.Shininess;
actStructSurface.MaterialProperties.SpecularColor = actMaterial.Specular;
// Initialize local index table (needed for vertex reuse)
int oneSideVertexCount = objInfo.Vertices.Count;
int[] localIndices = new int[oneSideVertexCount * 2];
for (int loop = 0; loop < localIndices.Length; loop++)
{
localIndices[loop] = int.MaxValue;
}
// Process all surfaces
foreach (ACSurface actSurface in objInfo.Surfaces)
{
// Get the vertex index on which to start
int startVertexIndex = structure.CountVertices;
int startTriangleIndex = actStructSurface.CountTriangles;
// Only handle surfaces of the current material
if (actSurface.Material != actMaterialIndex)
{
continue;
}
// Sort out unsupported surfaces
if (actSurface.VertexReferences.Count < 3)
{
continue;
}
if (actSurface.IsLine)
{
continue;
}
if (actSurface.IsClosedLine)
{
continue;
}
// Preprocess referenced vertices
int oneSideSurfaceVertexCount = actSurface.VertexReferences.Count;
int countSurfaceSides = actSurface.IsTwoSided ? 2 : 1;
int[] onStructureReferencedVertices = new int[oneSideSurfaceVertexCount * countSurfaceSides];
List <int> surfaceVertexReferences = actSurface.VertexReferences;
for (int loop = 0; loop < surfaceVertexReferences.Count; loop++)
{
Vector2 actTexCoord = actSurface.TextureCoordinates[loop];
if (!actSurface.IsFlatShaded)
{
// Try to reuse vertices on standard shading
if (localIndices[surfaceVertexReferences[loop]] == int.MaxValue)
{
Vector3 position = Vector3.Transform(
objInfo.Vertices[surfaceVertexReferences[loop]].Position,
transformStack.Top);
localIndices[surfaceVertexReferences[loop]] = structure.AddVertex(new Vertex(
position, Color4.White, actTexCoord, Vector3.Zero));
if (actSurface.IsTwoSided)
{
localIndices[surfaceVertexReferences[loop] + oneSideVertexCount] = structure.AddVertex(new Vertex(
position, Color4.White, actTexCoord, Vector3.Zero));
}
}
// Store vertex reference for this surface's index
onStructureReferencedVertices[loop] = localIndices[surfaceVertexReferences[loop]];
if (actSurface.IsTwoSided)
{
onStructureReferencedVertices[loop + oneSideSurfaceVertexCount] =
localIndices[surfaceVertexReferences[loop] + oneSideVertexCount];
}
}
else
{
// Create one vertex for one reference for flat shading
Vector3 position = Vector3.Transform(
objInfo.Vertices[surfaceVertexReferences[loop]].Position,
transformStack.Top);
onStructureReferencedVertices[loop] = structure.AddVertex(new Vertex(
position, Color4.White, actTexCoord, Vector3.Zero));
if (actSurface.IsTwoSided)
{
onStructureReferencedVertices[loop + oneSideSurfaceVertexCount] = structure.AddVertex(new Vertex(
position, Color4.White, actTexCoord, Vector3.Zero));
}
}
}
// Build object geometry
switch (actSurface.VertexReferences.Count)
{
case 3:
// Front side
actStructSurface.AddTriangle(
onStructureReferencedVertices[0],
onStructureReferencedVertices[1],
onStructureReferencedVertices[2]);
// Back side
if (actSurface.IsTwoSided)
{
actStructSurface.AddTriangle(
onStructureReferencedVertices[5],
onStructureReferencedVertices[4],
onStructureReferencedVertices[3]);
}
break;
case 4:
// Front side
actStructSurface.AddTriangle(
onStructureReferencedVertices[0],
onStructureReferencedVertices[1],
onStructureReferencedVertices[2]);
actStructSurface.AddTriangle(
onStructureReferencedVertices[2],
onStructureReferencedVertices[3],
onStructureReferencedVertices[0]);
// Back side
if (actSurface.IsTwoSided)
{
actStructSurface.AddTriangle(
onStructureReferencedVertices[6],
onStructureReferencedVertices[5],
onStructureReferencedVertices[4]);
actStructSurface.AddTriangle(
onStructureReferencedVertices[4],
onStructureReferencedVertices[7],
onStructureReferencedVertices[6]);
}
break;
default:
if (!actSurface.IsTwoSided)
{
// Front side
actStructSurface.AddPolygonByCuttingEars(onStructureReferencedVertices);
}
else
{
// Front and back side
actStructSurface.AddPolygonByCuttingEars(onStructureReferencedVertices.Subset(0, oneSideSurfaceVertexCount));
actStructSurface.AddPolygonByCuttingEars(onStructureReferencedVertices.Subset(oneSideSurfaceVertexCount, oneSideSurfaceVertexCount));
}
break;
}
// Perform shading
if (actSurface.IsFlatShaded)
{
actStructSurface.CalculateNormalsFlat(
startTriangleIndex, actStructSurface.CountTriangles - startTriangleIndex);
}
else
{
// Nothing to be done for now..
int vertexCount = structure.CountVertices - startVertexIndex;
if (vertexCount > 0)
{
standardShadedVertices.Add(
Tuple.Create((int)startVertexIndex, vertexCount));
}
}
}
// Calculate default shading finally (if any)
foreach (var actStandardShadedPair in standardShadedVertices)
{
structure.CalculateNormals(
actStandardShadedPair.Item1,
actStandardShadedPair.Item2);
}
standardShadedVertices.Clear();
// Append generated VertexStructure to the output collection
if ((actStructSurface.CountTriangles <= 0) &&
(isNewSurface))
{
structure.RemoveSurface(actStructSurface);
}
}
//Fill in all child object data
foreach (ACObjectInfo actObjInfo in objInfo.Childs)
{
FillVertexStructure(structure, acMaterials, actObjInfo, transformStack);
}
}
finally
{
transformStack.Pop();
}
}