add in asserts when rv3d->viewmatob, rv3d->persmatob are not initialized.

This is often hard to spot since in many cases it works correctly even
when not initialized but may still fail in other situations.

1 files changed, 12 insertions, 2 deletions

diff --git a/source/blender/blenlib/BLI_math_base.h b/source/blender/blenlib/BLI_math_base.h
index 04cf0b9d275..4b71babdba1 100644
--- a/source/blender/blenlib/BLI_math_base.h
+++ b/source/blender/blenlib/BLI_math_base.h
@@ -245,9 +245,19 @@ double double_round(double x, int ndigits);
 	BLI_assert((fabsf(_test_unit - 1.0f) < BLI_ASSERT_UNIT_EPSILON) ||        \
 	           (fabsf(_test_unit)        < BLI_ASSERT_UNIT_EPSILON));         \
 } (void)0
+
+#  define BLI_ASSERT_ZERO_M3(m)  {                                            \
+	BLI_assert(dot_vn_vn((const float *)m, (const float *)m, 9) != 0.0);     \
+} (void)0
+
+#  define BLI_ASSERT_ZERO_M4(m)  {                                            \
+	BLI_assert(dot_vn_vn((const float *)m, (const float *)m, 16) != 0.0);     \
+} (void)0
 #else
-#  define BLI_ASSERT_UNIT_V2(v) (void)0
-#  define BLI_ASSERT_UNIT_V3(v) (void)0
+#  define BLI_ASSERT_UNIT_V2(v) (void)(v)
+#  define BLI_ASSERT_UNIT_V3(v) (void)(v)
+#  define BLI_ASSERT_ZERO_M3(m) (void)(m)
+#  define BLI_ASSERT_ZERO_M4(m) (void)(m)
 #endif
 
 #endif /* __BLI_MATH_BASE_H__ */