public List <int> GetIndices(int primitiveIndex)
{
List <int> indices = new List <int>();
GLBPrimitive primitive = Primitives[primitiveIndex];
GLBBufferView bufferView = primitive.Indices.BufferView;
for (int bytePointer = 0; bytePointer < bufferView.ByteLength; bytePointer += sizeof(short))
{
int index = System.BitConverter.ToInt16(bufferView.Buffer, bufferView.ByteOffset + bytePointer);
indices.Add(index);
}
if (indices.Count != primitive.Indices.Count)
{
throw new Exception("Indices count does not equal expected count");
}
return(indices);
}
public List <Vertex> GetVertices(int primitiveIndex)
{
List <Vertex> vertices = new List <Vertex>();
GLBPrimitive primitive = Primitives[primitiveIndex];
GLBBufferView bufferView = primitive.Attributes.Position.BufferView;
for (int bytePointer = 0; bytePointer < bufferView.ByteLength; bytePointer += 3 * sizeof(float))
{
float x = System.BitConverter.ToSingle(bufferView.Buffer, bufferView.ByteOffset + bytePointer + sizeof(float) * 0);
float y = System.BitConverter.ToSingle(bufferView.Buffer, bufferView.ByteOffset + bytePointer + sizeof(float) * 1);
float z = System.BitConverter.ToSingle(bufferView.Buffer, bufferView.ByteOffset + bytePointer + sizeof(float) * 2);
Vertex vertex = new Vertex(x, y, z);
vertices.Add(vertex);
}
if (vertices.Count != primitive.Attributes.Position.Count)
{
throw new Exception("Vertices count does not equal expected count");
}
return(vertices);
}
/*
* public byte[] GetBuffer(int bufferIndex)
* {
* return FileChunks[bufferIndex + 1].Data;
* }
*/
public void ParseJSON(string JSONstring)
{
var json = JsonConvert.DeserializeObject <dynamic>(JSONstring);
foreach (var bufferViewJSON in json.bufferViews)
{
GLBBufferView bufferView = new GLBBufferView();
bufferView.Buffer = FileChunks[(int)bufferViewJSON.buffer + 1].Data;
bufferView.ByteOffset = bufferViewJSON.byteOffset;
bufferView.ByteLength = bufferViewJSON.byteLength;
bufferView.Target = bufferViewJSON.target;
BufferViews.Add(bufferView);
}
foreach (var accessorJSON in json.accessors)
{
GLBAccessor accessor = new GLBAccessor();
accessor.BufferView = BufferViews[(int)accessorJSON.bufferView];
accessor.ComponentType = accessorJSON.componentType;
accessor.Count = accessorJSON.count;
accessor.Type = accessorJSON.type;
Accessors.Add(accessor);
}
foreach (var imageJSON in json.images)
{
GLBImage image = new GLBImage();
image.BufferView = BufferViews[(int)imageJSON.bufferView];
image.MimeType = imageJSON.mimeType;
Images.Add(image);
}
foreach (var samplerJSON in json.samplers)
{
GLBSampler sampler = new GLBSampler();
sampler.MinFilter = samplerJSON.minFilter;
sampler.MagFilter = samplerJSON.magFilter;
sampler.WrapS = samplerJSON.wrapS;
sampler.WrapT = samplerJSON.wrapT;
Samplers.Add(sampler);
}
foreach (var textureJSON in json.textures)
{
GLBTexture texture = new GLBTexture();
texture.Source = Images[(int)textureJSON.source];
texture.Sampler = Samplers[(int)textureJSON.sampler];
Textures.Add(texture);
}
foreach (var materialJSON in json.materials)
{
GLBMaterial material = new GLBMaterial();
material.Name = materialJSON.name;
Materials.Add(material);
}
foreach (var meshJSON in json.meshes)
{
GLBMesh mesh = new GLBMesh();
mesh.Name = meshJSON.name;
foreach (var primitiveJSON in meshJSON.primitives)
{
GLBPrimitive primitive = new GLBPrimitive();
GLBAttributes attributes = new GLBAttributes();
attributes.Position = Accessors[(int)primitiveJSON.attributes.POSITION];
attributes.Normal = Accessors[(int)primitiveJSON.attributes.NORMAL];
primitive.Attributes = attributes;
primitive.Indices = Accessors[(int)primitiveJSON.indices];
primitive.Material = Materials[(int)primitiveJSON.material];
mesh.Primitives.Add(primitive);
}
Meshes.Add(mesh);
}
}
