diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_geom.c')
-rw-r--r-- | source/blender/blenlib/intern/math_geom.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index d54ec0f1ac1..fa50bf202a8 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -4709,6 +4709,25 @@ void perspective_m4(float mat[4][4], mat[3][3] = 0.0f; } +void perspective_m4_fov(float mat[4][4], + const float angle_left, + const float angle_right, + const float angle_up, + const float angle_down, + const float nearClip, + const float farClip) +{ + const float tan_angle_left = tanf(angle_left); + const float tan_angle_right = tanf(angle_right); + const float tan_angle_bottom = tanf(angle_up); + const float tan_angle_top = tanf(angle_down); + + perspective_m4( + mat, tan_angle_left, tan_angle_right, tan_angle_top, tan_angle_bottom, nearClip, farClip); + mat[0][0] /= nearClip; + mat[1][1] /= nearClip; +} + /* translate a matrix created by orthographic_m4 or perspective_m4 in XY coords * (used to jitter the view) */ void window_translate_m4(float winmat[4][4], float perspmat[4][4], const float x, const float y) |