fixes#13160
- remove unused types
- use System.Numerics when possible
- move own created types from OpenTK namespace to CoreGraphics
- create missing types in CoreGraphics namespace
Co-authored-by: Rolf Bjarne Kvinge <rolf@xamarin.com>
This turned out a bit complex, because numerous ModelIO APIs were initially bound
with wrong matrix types, and had to be rebound later (our matrix type was transposed
with regards to the native matrix type). The new versions often had to use worse
names, so that's being fixed now. This means that numerous tests had to be updated,
because the original API now returns non-transposed matrices.
* Rename them to be OpenTK.NMatrix# (instead of Simd.MatrixFloat#x#).
* Remove the Vector2 and Vector4 variants, we'll use the OpenTK types instead (but we'll keep the NVector3 variant, since it's not identical to the OpenTK version).
* Update the API to match their OpenTK counterparts better:
* NMatrix2 and NMatrix3 have a 0-based R#C# scheme for their fields.
* NMatrix4 has a 1-based M## scheme for its fields (i.e. no change).
Stephane Delcroix
Rolf Bjarne Kvinge
Timothy Risi