private static MgPrimitiveTopology DetermineTopology(MeshPrimitive.ModeEnum mode)
{
switch (mode)
{
case MeshPrimitive.ModeEnum.LINES:
return(MgPrimitiveTopology.LINE_LIST);
case MeshPrimitive.ModeEnum.LINE_STRIP:
return(MgPrimitiveTopology.LINE_STRIP);
case MeshPrimitive.ModeEnum.POINTS:
return(MgPrimitiveTopology.POINT_LIST);
case MeshPrimitive.ModeEnum.TRIANGLES:
return(MgPrimitiveTopology.TRIANGLE_LIST);
case MeshPrimitive.ModeEnum.TRIANGLE_FAN:
return(MgPrimitiveTopology.TRIANGLE_FAN);
case MeshPrimitive.ModeEnum.TRIANGLE_STRIP:
return(MgPrimitiveTopology.TRIANGLE_STRIP);
default:
throw new NotSupportedException();
}
}
internal static int AddLineLoop(this Gltf gltf, string name, List <byte> buffer, double[] vertices, ushort[] indices, double[] vMin, double[] vMax, ushort iMin, ushort iMax, int materialId, MeshPrimitive.ModeEnum mode, Transform transform = null)
{
var m = new glTFLoader.Schema.Mesh();
m.Name = name;
var vBuff = gltf.AddBufferView(0, buffer.Count, vertices.Length * sizeof(float), null, null);
var iBuff = gltf.AddBufferView(0, buffer.Count + vertices.Length * sizeof(float), indices.Length * sizeof(ushort), null, null);
foreach (var v in vertices)
{
buffer.AddRange(BitConverter.GetBytes((float)v));
}
foreach (var i in indices)
{
buffer.AddRange(BitConverter.GetBytes(i));
}
while (buffer.Count % 4 != 0)
{
// Console.WriteLine("Padding...");
buffer.Add(0);
}
var vAccess = gltf.AddAccessor(vBuff, 0, Accessor.ComponentTypeEnum.FLOAT, vertices.Length / 3, new[] { (float)vMin[0], (float)vMin[1], (float)vMin[2] }, new[] { (float)vMax[0], (float)vMax[1], (float)vMax[2] }, Accessor.TypeEnum.VEC3);
var iAccess = gltf.AddAccessor(iBuff, 0, Accessor.ComponentTypeEnum.UNSIGNED_SHORT, indices.Length, new[] { (float)iMin }, new[] { (float)iMax }, Accessor.TypeEnum.SCALAR);
var prim = new MeshPrimitive();
prim.Indices = iAccess;
prim.Material = materialId;
prim.Mode = mode;
prim.Attributes = new Dictionary <string, int> {
{ "POSITION", vAccess }
};
m.Primitives = new[] { prim };
// Add mesh to gltf
if (gltf.Meshes != null)
{
// TODO: Get rid of this resizing.
var meshes = gltf.Meshes.ToList();
meshes.Add(m);
gltf.Meshes = meshes.ToArray();
}
else
{
gltf.Meshes = new[] { m };
}
var parentId = 0;
if (transform != null)
{
var a = transform.XAxis;
var b = transform.YAxis;
var c = transform.ZAxis;
var transNode = new Node();
transNode.Matrix = new[] {
(float)a.X, (float)a.Y, (float)a.Z, 0.0f,
(float)b.X, (float)b.Y, (float)b.Z, 0.0f,
(float)c.X, (float)c.Y, (float)c.Z, 0.0f,
(float)transform.Origin.X, (float)transform.Origin.Y, (float)transform.Origin.Z, 1.0f
};
parentId = gltf.AddNode(transNode, 0);
}
// Add mesh node to gltf
var node = new Node();
node.Mesh = gltf.Meshes.Length - 1;
gltf.AddNode(node, parentId);
return(gltf.Meshes.Length - 1);
}
internal static int AddLineLoop(this Gltf gltf,
string name,
List <byte> buffer,
List <BufferView> bufferViews,
List <Accessor> accessors,
byte[] vertices,
byte[] indices,
double[] vMin,
double[] vMax,
ushort iMin,
ushort iMax,
int materialId,
MeshPrimitive.ModeEnum mode,
List <glTFLoader.Schema.Mesh> meshes,
List <glTFLoader.Schema.Node> nodes,
Transform transform = null)
{
var m = new glTFLoader.Schema.Mesh();
m.Name = name;
var vBuff = AddBufferView(bufferViews, 0, buffer.Count, vertices.Length, null, null);
var iBuff = AddBufferView(bufferViews, 0, buffer.Count + vertices.Length, indices.Length, null, null);
buffer.AddRange(vertices);
buffer.AddRange(indices);
while (buffer.Count % 4 != 0)
{
// Console.WriteLine("Padding...");
buffer.Add(0);
}
var vAccess = AddAccessor(accessors, vBuff, 0, Accessor.ComponentTypeEnum.FLOAT, vertices.Length / sizeof(float) / 3, new[] { (float)vMin[0], (float)vMin[1], (float)vMin[2] }, new[] { (float)vMax[0], (float)vMax[1], (float)vMax[2] }, Accessor.TypeEnum.VEC3);
var iAccess = AddAccessor(accessors, iBuff, 0, Accessor.ComponentTypeEnum.UNSIGNED_SHORT, indices.Length / sizeof(ushort), new[] { (float)iMin }, new[] { (float)iMax }, Accessor.TypeEnum.SCALAR);
var prim = new MeshPrimitive();
prim.Indices = iAccess;
prim.Material = materialId;
prim.Mode = mode;
prim.Attributes = new Dictionary <string, int> {
{ "POSITION", vAccess }
};
m.Primitives = new[] { prim };
// Add mesh to gltf
meshes.Add(m);
var parentId = 0;
if (transform != null)
{
var a = transform.XAxis;
var b = transform.YAxis;
var c = transform.ZAxis;
var transNode = new Node();
transNode.Matrix = new[] {
(float)a.X, (float)a.Y, (float)a.Z, 0.0f,
(float)b.X, (float)b.Y, (float)b.Z, 0.0f,
(float)c.X, (float)c.Y, (float)c.Z, 0.0f,
(float)transform.Origin.X, (float)transform.Origin.Y, (float)transform.Origin.Z, 1.0f
};
parentId = gltf.AddNode(nodes, transNode, 0);
}
// Add mesh node to gltf
var node = new Node();
node.Mesh = meshes.Count - 1;
gltf.AddNode(nodes, node, parentId);
return(meshes.Count - 1);
}
