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Diffstat (limited to 'test/gie/more_builtins.gie')
| -rw-r--r-- | test/gie/more_builtins.gie | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/gie/more_builtins.gie b/test/gie/more_builtins.gie index 67635642..b42dc1c5 100644 --- a/test/gie/more_builtins.gie +++ b/test/gie/more_builtins.gie @@ -879,4 +879,30 @@ expect 5.875 55.375 0 ------------------------------------------------------------------------------- + +------------------------------------------------------------------------------- +# Test inverse pipeline with noninvertible affine transformation. We define an +# affine transformation that's not invertible and omit the inverse path. We +# also define a step that handles the inverse and omits the forward path. +# +# Because the first affine matrix is not invertible, we specify omit_inv to +# disable executing in reverse. +# +# Now we need another affine to actually make the inverse operation. +# +# The second affine has omit_fwd and inv. We don't execute this when running +# forwards. When doing inverse, we call the inverse of the inverted affine which +# means that we actually do the forward of the specified affine. As it happens, +# the forward of this affine actually undoes what the first affine did in forward +# path. +------------------------------------------------------------------------------- + +------------------------------------------------------------------------------- +operation proj=pipeline step proj=affine omit_inv s11=2 s22=0 s33=0 step proj=affine omit_fwd inv s11=0.5 s22=0 s33=0 +------------------------------------------------------------------------------- + +accept 10 0 0 +expect 20 0 0 +roundtrip + </gie-strict> |