diff options
| -rw-r--r-- | linmath.h | 8 |
1 files changed, 4 insertions, 4 deletions
@@ -332,11 +332,11 @@ static inline void mat4x4_ortho(mat4x4 M, float l, float r, float b, float t, fl M[3][2] = -(f+n)/(f-n); M[3][3] = 1.; } -static inline void mat4x4_perspective(mat4x4 m, float y_fov_in_degrees, float aspect, float n, float f) +static inline void mat4x4_perspective(mat4x4 m, float y_fov, float aspect, float n, float f) { - /* Adapted from Android's OpenGL Matrix.java. */ - float const angle_in_radians = y_fov_in_degrees * M_PI / 180.f; - float const a = 1.f / tan(angle_in_radians / 2.f); + /* NOTE: Degrees are an unhandy unit to work with. + * linmath.h uses radians for everything! */ + float const a = 1.f / tan(y_fov / 2.f); m[0][0] = a / aspect; m[0][1] = 0.f; |