// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#meshes
int ExportIndices(int[] indices)
{
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#primitiveindices
indices = CoordUtils.FlipIndices(indices).ToArray();
// Scalar | UNSIGNED_BYTE
// | UNSIGNED_SHORT
// | UNSIGNED_INT! (TODO: optimize kind...)
byte[] buffer = PrimitiveExporter.Marshal(indices);
var viewIndex = BufferBuilder.AddView(
new ArraySegment <byte>(buffer),
null,
Types.BufferView.TargetEnum.ELEMENT_ARRAY_BUFFER);
var viewComponentType = Types.Accessor.ComponentTypeEnum.UNSIGNED_INT;
var accessor = new Types.Accessor
{
BufferView = viewIndex,
ByteOffset = 0,
ComponentType = viewComponentType,
Count = indices.Length,
Type = Types.Accessor.TypeEnum.Scalar,
};
return(Types.GltfExtensions.AddAccessor(Gltf, accessor));
}
public int Export(Texture2D tex)
{
RenderTexture renderTex = RenderTexture.GetTemporary(
tex.width,
tex.height,
0,
RenderTextureFormat.Default,
RenderTextureReadWrite.Linear);
Graphics.Blit(tex, renderTex);
RenderTexture previous = RenderTexture.active;
RenderTexture.active = renderTex;
Texture2D readableText = new Texture2D(tex.width, tex.height, TextureFormat.RGBA32, true, true);
readableText.ReadPixels(new Rect(0, 0, renderTex.width, renderTex.height), 0, 0);
readableText.Apply();
RenderTexture.active = previous;
RenderTexture.ReleaseTemporary(renderTex);
var pngBytes = readableText.EncodeToPNG();
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(pngBytes));
return(Types.GltfExtensions.AddImage(Gltf, new Types.Image
{
Name = tex.name,
MimeType = Types.Image.MimeTypeEnum.ImagePng,
BufferView = viewIndex,
}));
}
public void BuildTest()
{
var bufferBuilder = new BufferBuilder();
var view0 = new ArraySegment <byte>(new byte[] { 0x00, 0x01, 0x02 });
var view0Index = bufferBuilder.AddView(view0, 4, Types.BufferView.TargetEnum.ELEMENT_ARRAY_BUFFER);
var view1 = new ArraySegment <byte>(new byte[] { 0x10, 0x11 });
var view1Index = bufferBuilder.AddView(view1);
var view2 = new ArraySegment <byte>(new byte[] { 0x20, 0x21, 0x22, 0x23 });
var view2Index = bufferBuilder.AddView(view2);
List <Types.BufferView> views;
var bufferBytes = bufferBuilder.BuildBytes(out views);
Assert.AreEqual(12, bufferBytes.Length); // Actual size is 5Bytes, but aligned to 4Bytes.
Assert.That(bufferBytes, Is.EquivalentTo(new byte[] {
0x00, 0x01, 0x02, /* Align */ 0x00,
0x10, 0x11, /* Align */ 0x00, 0x00,
0x20, 0x21, 0x22, 0x23
}));
Assert.AreEqual(3, views.Count);
Assert.AreEqual(0, views[0].Buffer);
Assert.AreEqual(0, views[0].ByteOffset);
Assert.AreEqual(3, views[0].ByteLength);
Assert.AreEqual(4, views[0].ByteStride);
Assert.AreEqual(Types.BufferView.TargetEnum.ELEMENT_ARRAY_BUFFER, views[0].Target);
Assert.AreEqual(0, views[1].Buffer);
Assert.AreEqual(4, views[1].ByteOffset);
Assert.AreEqual(2, views[1].ByteLength);
Assert.AreEqual(null, views[1].ByteStride);
Assert.AreEqual(null, views[1].Target);
Assert.AreEqual(0, views[2].Buffer);
Assert.AreEqual(8, views[2].ByteOffset);
Assert.AreEqual(4, views[2].ByteLength);
Assert.AreEqual(null, views[2].ByteStride);
Assert.AreEqual(null, views[2].Target);
}
int ExportPositionsBuffer(ref Vector3[] vec3, out Types.Accessor.ComponentTypeEnum componentType)
{
vec3 = vec3.Select(CoordUtils.ConvertSpace).ToArray();
// VEC3! | FLOAT!
byte[] buffer = PrimitiveExporter.Marshal(vec3);
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(buffer));
componentType = Types.Accessor.ComponentTypeEnum.FLOAT;
return(viewIndex);
}
int ExportSparseIndicesBuffer(ref int[] indices, out Types.Accessor.SparseType.IndicesType.ComponentTypeEnum componentType)
{
// Scalar | UNSIGNED_BYTE
// | UNSIGNED_SHORT
// | UNSIGNED_INT! (TODO: optimize kind...)
byte[] buffer = PrimitiveExporter.Marshal(indices);
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(buffer));
componentType = Types.Accessor.SparseType.IndicesType.ComponentTypeEnum.UNSIGNED_INT;
return(viewIndex);
}
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skin
int ExportInverseBindMatrices(Matrix4x4[] matrices)
{
matrices = matrices.Select(CoordUtils.ConvertSpace).ToArray();
// MAT4! | FLOAT!
byte[] buffer = PrimitiveExporter.Marshal(matrices);
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(buffer));
var accessor = new Types.Accessor
{
BufferView = viewIndex,
ByteOffset = 0,
ComponentType = Types.Accessor.ComponentTypeEnum.FLOAT,
Count = matrices.Length,
Type = Types.Accessor.TypeEnum.Mat4,
};
return(Types.GltfExtensions.AddAccessor(Gltf, accessor));
}
int ExportWeights(Vector4[] weights)
{
// VEC4! | FLOAT!
// | UNSIGNED_BYTE (normalized)
// | UNSIGNED_SHORT (normalized)
byte[] buffer = PrimitiveExporter.Marshal(weights);
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(buffer));
var accessor = new Types.Accessor
{
BufferView = viewIndex,
ByteOffset = 0,
ComponentType = Types.Accessor.ComponentTypeEnum.FLOAT,
Count = weights.Length,
Type = Types.Accessor.TypeEnum.Vec4,
};
return(Types.GltfExtensions.AddAccessor(Gltf, accessor));
}
int ExportTangents(Vector4[] vec4)
{
vec4 = vec4.Select(CoordUtils.ConvertSpace).ToArray();
// VEC4! | FLOAT!
byte[] buffer = PrimitiveExporter.Marshal(vec4);
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(buffer));
var accessor = new Types.Accessor
{
BufferView = viewIndex,
ByteOffset = 0,
ComponentType = Types.Accessor.ComponentTypeEnum.FLOAT,
Count = vec4.Length,
Type = Types.Accessor.TypeEnum.Vec4,
};
return(Types.GltfExtensions.AddAccessor(Gltf, accessor));
}
int ExportUV(Vector2[] uv)
{
uv = uv.Select(CoordUtils.ConvertUV).ToArray();
// VEC2! | FLOAT!
// | UNSIGNED_BYTE (normalized)
// | UNSIGNED_SHORT (normalized)
byte[] buffer = PrimitiveExporter.Marshal(uv);
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(buffer));
var accessor = new Types.Accessor
{
BufferView = viewIndex,
ByteOffset = 0,
ComponentType = Types.Accessor.ComponentTypeEnum.FLOAT,
Count = uv.Length,
Type = Types.Accessor.TypeEnum.Vec2,
};
return(Types.GltfExtensions.AddAccessor(Gltf, accessor));
}
int ExportJoints(Vec4 <int>[] joints)
{
// VEC4! | UNSIGNED_BYTE
// | UNSIGNED_SHORT!
byte[] buffer = PrimitiveExporter.Marshal(
joints
.Select(v => new Vec4 <ushort>((ushort)v.x, (ushort)v.y, (ushort)v.z, (ushort)v.w))
.ToArray()
);
var viewIndex = BufferBuilder.AddView(new ArraySegment <byte>(buffer));
var accessor = new Types.Accessor
{
BufferView = viewIndex,
ByteOffset = 0,
ComponentType = Types.Accessor.ComponentTypeEnum.UNSIGNED_SHORT,
Count = joints.Length,
Type = Types.Accessor.TypeEnum.Vec4,
};
return(Types.GltfExtensions.AddAccessor(Gltf, accessor));
}
