Open Source Tomb Raider Engine
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  1. /*!
  2. *
  3. * \file include/math/math.h
  4. * \brief Vector and Matrix math
  5. *
  6. * \author Mongoose
  7. * \author xythobuz
  8. */
  9. #ifndef _MATH_MATH_H
  10. #define _MATH_MATH_H
  11. #ifndef M_PI
  12. #define OR_PI (3.14159265358979323846f) //!< pi
  13. #else
  14. #define OR_PI ((float)M_PI) //!< pi
  15. #endif
  16. #define OR_RAD_TO_DEG(x) ((x) * (180.0f / OR_PI)) //!< Convert radians to degrees
  17. #define OR_DEG_TO_RAD(x) ((x) * (OR_PI / 180.0f)) //!< Convert degrees to radians
  18. /*!
  19. * \brief Compare two floats with an Epsilon.
  20. * \param a first float
  21. * \param b second float
  22. * \returns true if a and b are probably the same.
  23. */
  24. bool equalEpsilon(float a, float b);
  25. /*!
  26. * \brief Calculate Intersection of a line and a polygon
  27. * \param intersect Where the intersection is stored, if it exists
  28. * \param p1 First point of line segment
  29. * \param p2 Second point of line segment
  30. * \param polygon polygon vertex array (0 to 2 are used)
  31. * \returns 0 if there is no intersection
  32. */
  33. int intersectionLinePolygon(float intersect[3], float p1[3], float p2[3], float polygon[3][3]);
  34. /*!
  35. * \brief Calculate the length of a line segment / the distance between two points
  36. * \param a First point
  37. * \param b Second point
  38. * \returns distance/length
  39. */
  40. float distance(const float a[3], const float b[3]);
  41. /*!
  42. * \brief Calculates the midpoint between two points / of a line segment
  43. * \param a First point
  44. * \param b Second point
  45. * \param mid Midpoint will be stored here
  46. */
  47. void midpoint(const float a[3], const float b[3], float mid[3]);
  48. /*!
  49. * \brief Calculates a pseudo-random number
  50. * \param from Lower bound of resulting number
  51. * \param to Upper bound
  52. * \returns random number
  53. */
  54. float randomNum(float from, float to);
  55. #endif