vector.c 973 B

1234567891011121314151617181920212223242526272829303132333435363738394041
  1. /*
  2. * 3D Engine
  3. * vector.c:
  4. * Based on pikuma.com 3D software renderer in C
  5. * Copyright (c) 2021 986-Studio. All rights reserved.
  6. *
  7. * Created by Manoël Trapier on 02/03/2021.
  8. */
  9. #include <vector.h>
  10. #include <math.h>
  11. vec3_t vec3RotateX(vec3_t original, double angle)
  12. {
  13. vec3_t ret = {
  14. .x = original.x,
  15. .y = original.y * cos(angle) - original.z * sin(angle),
  16. .z = original.y * sin(angle) + original.z * cos(angle)
  17. };
  18. return ret;
  19. }
  20. vec3_t vec3RotateY(vec3_t original, double angle)
  21. {
  22. vec3_t ret = {
  23. .x = original.x * cos(angle) - original.z * sin(angle),
  24. .y = original.y,
  25. .z = original.x * sin(angle) + original.z * cos(angle)
  26. };
  27. return ret;
  28. }
  29. vec3_t vec3RotateZ(vec3_t original, double angle)
  30. {
  31. vec3_t ret = {
  32. .x = original.x * cos(angle) - original.y * sin(angle),
  33. .y = original.x * sin(angle) + original.y * cos(angle),
  34. .z = original.z,
  35. };
  36. return ret;
  37. }