private List <Transformation> CreateCameras()
{
var cameras = new List <Transformation>();
void CreateCamera(Transformation worldTransformation, int nodeId)
{
var node = gltf.Nodes[nodeId];
if (node.Camera.HasValue)
{
var camera = gltf.Cameras[node.Camera.Value];
var invWorldTransform = Transformation.Invert(worldTransformation);
if (camera.Orthographic != null)
{
var o = camera.Orthographic;
var mtx = Matrix4x4.CreateOrthographic(2f * o.Xmag, 2f * o.Ymag, o.Znear, o.Zfar);
cameras.Add(Transformation.Combine(invWorldTransform, new Transformation(mtx)));
}
if (camera.Perspective != null)
{
var p = camera.Perspective;
var mtx = Matrix4x4.CreatePerspectiveFieldOfView(p.Yfov, p.AspectRatio ?? 1f, p.Znear, p.Zfar ?? 1e6f);
cameras.Add(Transformation.Combine(invWorldTransform, new Transformation(mtx)));
}
}
}
foreach (var scene in gltf.Scenes)
{
TraverseNodes(scene.Nodes, Transformation.Identity, CreateCamera);
}
return(cameras);
}
public Matrix4x4[] CalculateJointTransforms()
{
var jointTransforms = new Dictionary <int, Matrix4x4>();
void CalcJointTransforms(Transformation worldTransformation, int nodeId)
{
var node = gltf.Nodes[nodeId];
if (jointNodeInverseBindTransform.TryGetValue(nodeId, out var inverseBindTransform))
{
var ibt = jointNodeInverseBindTransform[nodeId];
var jointTransform = Transformation.Combine(ibt, worldTransformation);
jointTransforms.Add(nodeId, jointTransform.Matrix);
}
}
foreach (var scene in gltf.Scenes)
{
TraverseNodes(scene.Nodes, Transformation.Identity, CalcJointTransforms);
}
var joints = new List <Matrix4x4>(jointTransforms.Count);
foreach (var nodeId in skinJointNodeIds)
{
joints.Add(jointTransforms[nodeId]);
}
return(joints.ToArray());
}
public List <T> CloneAndMirrorNodesOf(IEnumerable <Edge <T> > edges)
{
clones = new List <T>();
visited = new LinkedList <int>();
foreach (Pair <Edge <T> > edgePair in new Convolution <Edge <T> >(edges))
{
Transformation transformation = GetBoundaryTransformationOf(edgePair.Current);
T transformedClone = CloneAndTransFormAssociatedNodeOf(edgePair.Current, transformation);
clones.Add(transformedClone);
if (IsCorner(edgePair.Current, edgePair.Previous))
{
Transformation previousTransformation = GetBoundaryTransformationOf(edgePair.Previous);
Transformation edgeTransformation = Transformation.Combine(transformation, previousTransformation);
foreach (MeshCell <T> cell in GetSurroundingCells(edgePair.Previous))
{
TryToCloneAndTransform(cell, edgeTransformation);
}
foreach (MeshCell <T> cell in GetSurroundingCells(edgePair.Current))
{
TryToCloneAndTransform(cell, edgeTransformation);
}
visited.Clear();
}
}
return(clones);
}
private void AddGen2(Node parent)
{
var child = new Node(Transformation.Combine(Transformation.Scale(0.4f), Transformation.Translation(0.7f, 0f, 0f)), parent);
child.RegisterTypeInstance(new CreateGeometryTag());
var nodeRotation = AddRotationNode(child, 500f / 60f);
AddGen3(nodeRotation);
}
private static void AddGen3(Node parent)
{
var st = Transformation.Combine(Transformation.Scale(0.2f), Transformation.Translation(0.55f, 0f, 0f));
for (int i = 0; i < 8; ++i)
{
var xform = Transformation.Combine(st, Transformation.Rotation(45f * i));
var grandChild = new Node(xform, parent);
grandChild.RegisterTypeInstance(new CreateGeometryTag());
}
}
private void AddGen1(Node parent)
{
var st = Transformation.Combine(Transformation.Scale(0.6f), Transformation.Translation(1f, 0f, 0f));
for (int i = 0; i < 4; ++i)
{
var xform = Transformation.Combine(st, Transformation.Rotation(90f * i));
var node = new Node(xform, parent);
node.RegisterTypeInstance(new CreateGeometryTag());
var nodeRotation = AddRotationNode(node, -300f / 60f);
AddGen2(nodeRotation);
}
}