public void Test_SingleCoordinate()
{
var calculator = new ObjectTreeBoundingBoxCalculator();
calculator.AddCoordinate(new Vector3(-1f, 0f, -1f));
Assert.IsFalse(calculator.CanCreateBoundingBox);
}
public void Test_MoreEqualCoordinates_CreateBoxException()
{
var calculator = new ObjectTreeBoundingBoxCalculator();
calculator.AddCoordinate(new Vector3(-1f, 0f, -1f));
calculator.AddCoordinate(new Vector3(-1f, 0f, -1f));
calculator.AddCoordinate(new Vector3(-1f, 0f, -1f));
calculator.AddCoordinate(new Vector3(-1f, 0f, -1f));
Assert.IsFalse(calculator.CanCreateBoundingBox);
calculator.CreateBoundingBox();
}
public void Test_DefaultUsage()
{
var calculator = new ObjectTreeBoundingBoxCalculator();
calculator.AddCoordinate(new Vector3(-1f, 0f, -1f));
calculator.AddCoordinate(new Vector3(1f, 1f, 1f));
Assert.IsTrue(calculator.CanCreateBoundingBox);
var boundingBox = calculator.CreateBoundingBox();
Assert.IsTrue(boundingBox.Minimum.Equals(new Vector3(-1f, 0f, -1f)));
Assert.IsTrue(boundingBox.Maximum.Equals(new Vector3(1f, 1f, 1f)));
}
public ImportedModelContainer ImportModel(ResourceLink sourceFile, ImportOptions importOptions)
{
var modelContainer = new ImportedModelContainer(sourceFile, importOptions);
// Load Assimp scene
using var assimpContext = new AssimpContext();
assimpContext.SetIOSystem(new AssimpIOSystem(sourceFile));
var scene = assimpContext.ImportFile(
sourceFile.FileNameWithExtension,
PostProcessPreset.TargetRealTimeFast | PostProcessSteps.SplitLargeMeshes);
// Load all materials
ProcessMaterials(modelContainer, scene);
// Load all scene objects
var boundBoxCalculator = new ObjectTreeBoundingBoxCalculator();
ProcessNode(modelContainer, scene, scene.RootNode, null, boundBoxCalculator);
// Finish loading
modelContainer.FinishLoading(boundBoxCalculator.CreateBoundingBox());
return(modelContainer);
}
public void Test_Empty()
{
var calculator = new ObjectTreeBoundingBoxCalculator();
Assert.IsFalse(calculator.CanCreateBoundingBox);
}
private static void ProcessNode(
ImportedModelContainer modelContainer,
Scene scene, Node actNode, SceneObject?actParent,
ObjectTreeBoundingBoxCalculator boundingBoxCalc)
{
SceneObject?nextParent = null;
if (actNode.HasMeshes)
{
var actTransform = Matrix4x4.Transpose(AssimpHelper.MatrixFromAssimp(actNode.Transform));
boundingBoxCalc.PushTransform(ref actTransform);
// Count vertices
var fullVertexCount = 0;
foreach (var actMeshId in actNode.MeshIndices)
{
var actMesh = scene.Meshes[actMeshId];
fullVertexCount += actMesh.VertexCount;
}
// This one has true geometry
var meshCount = actNode.MeshCount;
var newGeometry = new Geometry(fullVertexCount);
var materialKeys = new NamedOrGenericKey[meshCount];
for (var meshIndex = 0; meshIndex < meshCount; meshIndex++)
{
var actMeshId = actNode.MeshIndices[meshIndex];
var actBaseVertex = newGeometry.CountVertices;
var actMesh = scene.Meshes[actMeshId];
List <Color4D>?vertexColors = null;
if (actMesh.HasVertexColors(0))
{
vertexColors = actMesh.VertexColorChannels[0];
}
List <Vector3D>?textureCoords1 = null;
if (actMesh.TextureCoordinateChannelCount > 0)
{
textureCoords1 = actMesh.TextureCoordinateChannels[0];
}
// Create all vertices
var vertexCount = actMesh.VertexCount;
for (var actVertexId = 0; actVertexId < vertexCount; actVertexId++)
{
var vertexIndex = newGeometry.AddVertex();
ref var newVertex = ref newGeometry.GetVertexBasicRef(vertexIndex);
newVertex.Position = AssimpHelper.Vector3FromAssimp(actMesh.Vertices[actVertexId]);
if (actMesh.HasNormals)
{
newVertex.Normal = AssimpHelper.Vector3FromAssimp(actMesh.Normals[actVertexId]);
}
if (vertexColors != null)
{
newVertex.Color = AssimpHelper.Color4FromAssimp(vertexColors[actVertexId]);
}
if (textureCoords1 != null)
{
newVertex.TexCoord1 = AssimpHelper.Vector2FromAssimp(textureCoords1[actVertexId]);
}
boundingBoxCalc.AddCoordinate(ref newVertex.Position);
}
// Create all faces
var newSurface = newGeometry.CreateSurface(actMesh.FaceCount * 3);
foreach (var actFace in actMesh.Faces)
{
if (actFace.IndexCount != 3)
{
continue;
}
newSurface.AddTriangle(
actBaseVertex + actFace.Indices[0],
actBaseVertex + actFace.Indices[1],
actBaseVertex + actFace.Indices[2]);
}
materialKeys[meshIndex] = modelContainer.GetResourceKey("Material", actMesh.MaterialIndex.ToString());
}
var geometryKey = modelContainer.GetResourceKey("Geometry", actNode.Name);
modelContainer.AddResource(new ImportedResourceInfo(
modelContainer.GetResourceKey("Geometry", actNode.Name),
_ => new GeometryResource(newGeometry)));
var newMesh = new Mesh(geometryKey, materialKeys);
newMesh.CustomTransform = actTransform;
newMesh.TransformationType = SpacialTransformationType.CustomTransform;
newMesh.Name = actNode.Name;
modelContainer.AddObject(newMesh);
nextParent = newMesh;
if (actParent != null)
{
modelContainer.AddParentChildRelationship(new ParentChildRelationship(actParent, newMesh));
}
}