Configurable sensor size:

- Added support of variable size sensor width and height.
- Added presets for most common cameras, also new presets can be defined by user.
- Added option to control which dimension (vertical or horizontal) of sensor
  size defines FOV. Old behavior of automatic FOV calculation is also kept.
- Renderer, viewport, game engine and collada importer/exporter should
  deal fine with this changes. Other exporters would be updated soon.

3 files changed, 7 insertions, 7 deletions

diff --git a/source/blender/blenlib/BLI_math_rotation.h b/source/blender/blenlib/BLI_math_rotation.h
index aef1c4bb46c..fca7c3469a1 100644
--- a/source/blender/blenlib/BLI_math_rotation.h
+++ b/source/blender/blenlib/BLI_math_rotation.h
@@ -179,8 +179,8 @@ void dquat_to_mat4(float R[4][4], DualQuat *dq);
 void quat_apply_track(float quat[4], short axis, short upflag);
 void vec_apply_track(float vec[3], short axis);
 
-float lens_to_angle(float lens);
-float angle_to_lens(float angle);
+float focallength_to_fov(float focal_length, float sensor);
+float fov_to_focallength(float fov, float sensor);
 
 float angle_wrap_rad(float angle);
 float angle_wrap_deg(float angle);
diff --git a/source/blender/blenlib/intern/math_rotation.c b/source/blender/blenlib/intern/math_rotation.c
index 0ca8b72c1e3..7fecbae8229 100644
--- a/source/blender/blenlib/intern/math_rotation.c
+++ b/source/blender/blenlib/intern/math_rotation.c
@@ -1688,14 +1688,14 @@ void vec_apply_track(float vec[3], short axis)
 }
 
 /* lens/angle conversion (radians) */
-float lens_to_angle(float lens)
+float focallength_to_fov(float focal_length, float sensor)
 {
-	return 2.0f * atanf(16.0f/lens);
+	return 2.0f * atanf((sensor/2.0f) / focal_length);
 }
 
-float angle_to_lens(float angle)
+float fov_to_focallength(float hfov, float sensor)
 {
-	return 16.0f / tanf(angle * 0.5f);
+	return (sensor/2.0f) / tanf(hfov * 0.5f);
 }
 
 /* 'mod_inline(-3,4)= 1', 'fmod(-3,4)= -3' */
diff --git a/source/blender/blenlib/intern/uvproject.c b/source/blender/blenlib/intern/uvproject.c
index 30625e7b34e..8b00d8e48a6 100644
--- a/source/blender/blenlib/intern/uvproject.c
+++ b/source/blender/blenlib/intern/uvproject.c
@@ -141,7 +141,7 @@ UvCameraInfo *project_camera_info(Object *ob, float (*rotmat)[4], float winx, fl
 	uci.do_pano = (camera->flag & CAM_PANORAMA);
 	uci.do_persp = (camera->type==CAM_PERSP);
 
-	uci.camangle= lens_to_angle(camera->lens) / 2.0f;
+	uci.camangle= focallength_to_fov(camera->lens, camera->sensor_x) / 2.0f;
 	uci.camsize= uci.do_persp ? tanf(uci.camangle) : camera->ortho_scale;
 
 	/* account for scaled cameras */