public BufferGeometry4(Mesh[] Meshes, Matrix4x4 PositionTransform, int Version = 0)
{
metadata = new BufferGeometry4_Meta();
metadata.version = Version;
data = new BufferGeometry4_Data();
data.attributes = new BufferGeometry4_Attributes();
ModifyVector3 ReorientatePosition = (ref Vector3 p) =>
{
p = PositionTransform.MultiplyPoint(p);
WorldUnityToThreeJs(ref p);
/*gr: old method needed setting...
* if ( PositionTransform.HasValue )
* {
* var TransformedP = PositionTransform.Value * new Vector4( p.x, p.y, p.z, 1 );
* p.Set( TransformedP.x, TransformedP.y, TransformedP.z );
* }
*/
};
// serialise data
for (int m = 0; m < Meshes.Length; m++)
{
var mesh = Meshes[m];
int FirstVertex = WriteAttribute(ref data.attributes.position, mesh.vertices, ReorientatePosition);
WriteAttribute(ref data.attributes.normal, mesh.normals);
WriteAttribute(ref data.attributes.uv, mesh.uv);
WriteAttribute(ref data.attributes.uv2, mesh.uv2);
WriteAttribute(ref data.attributes.color, mesh.colors);
// gr: if an attrib is null, unity still serialises an "empty" class. if its empty.. three js will throw an exception... so make empty attribs
PadAttribute(ref data.attributes.position);
PadAttribute(ref data.attributes.normal);
PadAttribute(ref data.attributes.uv);
PadAttribute(ref data.attributes.uv2);
PadAttribute(ref data.attributes.color);
// write triangle indexes
WriteAttribute(ref data.index, mesh.triangles, FirstVertex);
}
}
public BufferGeometry4(Mesh mesh, Matrix4x4 Transform, int Version = 0)
{
metadata = new BufferGeometry4_Meta();
metadata.version = Version;
data = new BufferGeometry4_Data();
data.attributes = new BufferGeometry4_Attributes();
ModifyVector3 ReorientatePosition = (ref Vector3 p) =>
{
p = Transform.MultiplyPoint(p);
// +y is up in threejs (by default)
//p.y = -p.y;
// xz seems to be wrong too. Experimenting suggests just z needs correcting
//p.x = -p.x;
p.z = -p.z;
};
// serialise data
// note: we write them all
WriteAttribute(ref data.attributes.position, mesh.vertices, ReorientatePosition);
WriteAttribute(ref data.attributes.normal, mesh.normals);
WriteAttribute(ref data.attributes.uv, mesh.uv);
WriteAttribute(ref data.attributes.uv2, mesh.uv2);
WriteAttribute(ref data.attributes.color, mesh.colors);
// gr: if an attrib is null, unity still serialises an "empty" class. if its empty.. three js will throw an exception... so make empty attribs
PadNullAttribute(ref data.attributes.position);
PadNullAttribute(ref data.attributes.normal);
PadNullAttribute(ref data.attributes.uv);
PadNullAttribute(ref data.attributes.uv2);
PadNullAttribute(ref data.attributes.color);
// write triangle indexes - currently just a direct copy
data.index = new BufferGeometry4_Attribute_Int();
data.index.array = mesh.triangles;
}
int WriteAttribute(ref BufferGeometry4_Attribute_Float Attribute, Vector3[] VectorArray, ModifyVector3 Modify = null)
{
// gr: maybe pad here
if (VectorArray == null)
{
return(0);
}
int VectorSize = 3;
if (Attribute == null)
{
Attribute = new BufferGeometry4_Attribute_Float(VectorSize);
}
int FirstIndex = Attribute.array.Count / VectorSize;
Vector3 Temp = new Vector3();
for (int i = 0; i < VectorArray.Length; i++)
{
Temp = VectorArray[i];
if (Modify != null)
{
Modify(ref Temp);
}
Attribute.array.Add(Temp.x);
Attribute.array.Add(Temp.y);
Attribute.array.Add(Temp.z);
}
return(FirstIndex);
}
void WriteAttribute(ref BufferGeometry4_Attribute_Float Attribute, Vector3[] VectorArray, ModifyVector3 Modify = null)
{
if (VectorArray == null)
{
Attribute = null;
return;
}
int VectorSize = 3;
// todo: expand array for merging multiple meshes
Attribute = new BufferGeometry4_Attribute_Float(VectorSize);
float[] FloatArray = new float[VectorArray.Length * VectorSize];
for (int i = 0; i < VectorArray.Length; i++)
{
var Pos3 = VectorArray[i];
if (Modify != null)
{
Modify(ref Pos3);
}
FloatArray[(i * VectorSize) + 0] = Pos3.x;
FloatArray[(i * VectorSize) + 1] = Pos3.y;
FloatArray[(i * VectorSize) + 2] = Pos3.z;
}
Attribute.array = FloatArray;
}
