Matrix XNA and OpenVR

gistfile1.txt

Hi,

For information, OpenVR matrix are left handed and XNA/DirectX matrix are right handed.

Some rotations / positions are reversed.

Thank you for your help, it'll allow me to bring VR to MonoGame :)

# XNA Matrix

SX Rot Rot 0
Rot SY Rot 0
Rot Rot SZ 0
TX  TY  TZ  1

## Rotation X

1  0     0    0
0 -0.83 -0.54 0
0 0.54  -0.83 0
0 0      0    1

## Perspective : FOV 45°, Ratio 1024/800, near 0.1 far 1000
2.33 0    0   0
0    1.83 0   0
0    0    -1 -1
0    0    -1  0

# OpenVR Matrix

## Perspective
### Raw data
m0 1.19
m1 0
m2 -0.14
m3 0
m4 0
m5 0.99
m6 -0.11
m7 0
m8 0
m9 0
m10 -1
m11 -0.1
m12 0
m13 0
m14 -1
m15 0

### To XNA Matrix
var m = new Matrix(
    mat.m0, mat.m4, mat.m8, mat.m12,
    mat.m1, mat.m5, mat.m9, mat.m13,
    mat.m2, mat.m6, mat.m10, mat.m14,
    mat.m3, mat.m7, mat.m11, mat.m15);
    
1.19 0 0 0
0 0.99 0 0
-0.14 -0.11 -1 -1
0 0 -0.1 0

## Transform
### Raw data
m0 -0.94
m1 0
m2 -0.12
m3 -0.97
m4 0
m5 1
m6 0
m7 0.99
m8 0.12
m9 0
m10 -0.94
m11 -1.7

### To XNA Matrix
var m = new Matrix(
      mat.m0, mat.m4, mat.m8, 0.0f,
      mat.m1, mat.m5, mat.m9, 0.0f,
      mat.m2, mat.m6, mat.m10, 0.0f,
      mat.m3, mat.m7, mat.m11, 1.0f);