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MILERR_ZEROVECTOR
MILERR_ZEROVECTOR is a Windows Media Integration Layer (MIL) HRESULT. It indicates that a geometry or graphics calculation requires a nonzero vector but received no usable direction.
Diagnostic discriminator: Record the vector inputs before normalization or orientation calculation and check for coincident geometry. A nonzero control through the same code path isolates degenerate input and avoids misdiagnosing a device or precision problem.
What to check for MILERR_ZEROVECTOR
- Validate vector length before normalizing, constructing a tangent, or deriving an orientation.
- Check source coordinates for coincident points or collapsed geometry.
- Define a deliberate no-op or default direction for degenerate input rather than dividing by zero.
Microsoft documentation about WPF hardware-accelerated rendering
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