mirror of
https://github.com/scp-fs2open/fs2open.github.com.git
synced 2026-11-09 17:52:08 -10:00
Goober5000
7145b3cb7e
Two related fixes flagged by an audit of vm_vector_2_matrix_norm callers: ParticleEffectAction: locals.direction defaulted to vmd_zero_vector, which would trip vm_vector_2_matrix_norm's unit-length assertion (and divide by zero in release) when an action program emitted a particle effect without first running a Set Direction action. Default to vmd_z_vector so the unset-direction path always feeds a unit vector. matrix_h / Lua orientation type: the element indexer (m[1..9] = x) wrote arbitrary floats straight into mtx.a1d[idx] and the resulting non-orthonormal matrix could flow into obj->orient via the Orientation virt-vars on object/modelinstance/subsystem, breaking downstream engine code that assumes the basis vectors are unit length. getInterpolated had the same problem by design (pure linear interp, no normalization). Adds a fourth MatrixState, NeedsOrthonormalize, which the indexer setter and getInterpolated use to flag their output. ValidateMatrix and ValidateAngles now call vm_orthogonalize_matrix when they observe that state, so any consumer that reads through GetMatrix/GetAngles gets a valid orientation without each call site needing its own guard. getInterpolated is also marked ADE_FUNC_DEPRECATED at FSO 26.0 in favor of rotationalInterpolate; mods targeting older versions keep the legacy linear blend (now safely orthonormalized on use).