citro3d 1.7.1

What's Changed

• Correct typo in tex3ds docs by @oreo639 in #60
• Add C3D_LightEnvBumpNormalZ() by @oreo639 in #63
• Add M_PI for C++
• Fix for libctru 2.3.0 (use CTR_ALIGN)

New Contributors

• @oreo639 made their first contribution in #60