cam.rst

C

camera

Header: cglm/cam.h

There are many convenient functions for camera. For instance :cglm_look is just wrapper for :cglm_lookat. Sometimes you only have direction instead of target, so that makes easy to build view matrix using direction. There is also :cglm_look_anyup function which can help build view matrix without providing UP axis. It uses :cglm_vec3_ortho to get a UP axis and builds view matrix.

You can also _default versions of ortho and perspective to build projection fast if you don't care specific projection values.

_decomp means decompose; these function can help to decompose projection matrices.

Note

Be careful when working with high range (very small near, very large far) projection matrices. You may not get exact value you gave. float type cannot store very high precision so you will lose precision. Also your projection matrix will be inaccurate due to losing precision

Table of contents (click to go):

Functions:

1. :cglm_frustum
2. :cglm_ortho
3. :cglm_ortho_aabb
4. :cglm_ortho_aabb_p
5. :cglm_ortho_aabb_pz
6. :cglm_ortho_default
7. :cglm_ortho_default_s
8. :cglm_perspective
9. :cglm_persp_move_far
10. :cglm_perspective_default
11. :cglm_perspective_resize
12. :cglm_lookat
13. :cglm_look
14. :cglm_look_anyup
15. :cglm_persp_decomp
16. :cglm_persp_decompv
17. :cglm_persp_decomp_x
18. :cglm_persp_decomp_y
19. :cglm_persp_decomp_z
20. :cglm_persp_decomp_far
21. :cglm_persp_decomp_near
22. :cglm_persp_fovy
23. :cglm_persp_aspect
24. :cglm_persp_sizes

Functions documentation

Parameters:

[in] aspect aspect aspect ratio ( width / height )
[out] dest result matrix