[sfm] Fix enum binary code. openMVG#1306

Thx to @Yannnnnnnnnnnn

src/openMVG/cameras/Camera_Common.hpp

@@ -91,10 +91,11 @@ static inline bool isValid( EINTRINSIC eintrinsic )
 */
 enum class Intrinsic_Parameter_Type : int
 {
-  NONE                    = 0x01, // All parameters will be held constant
-  ADJUST_FOCAL_LENGTH     = 0x02,
-  ADJUST_PRINCIPAL_POINT  = 0x04,
-  ADJUST_DISTORTION       = 0x08,
+  // Note: Use power of two values in order to use bitwise operators.
+  NONE                    = 1, // All parameters will be held constant
+  ADJUST_FOCAL_LENGTH     = 2,
+  ADJUST_PRINCIPAL_POINT  = 4,
+  ADJUST_DISTORTION       = 8,
   ADJUST_ALL = ADJUST_FOCAL_LENGTH | ADJUST_PRINCIPAL_POINT | ADJUST_DISTORTION
 };
 

src/openMVG/sfm/sfm_data_BA.hpp

@@ -19,9 +19,10 @@ struct SfM_Data;
 /// Enum to control which parameter(s) of the Camera motion must be refined or not
 enum class Extrinsic_Parameter_Type : int
 {
-  NONE                = 0x01,     // Extrinsic parameters will be considered as FIXED
-  ADJUST_ROTATION     = 0x02,
-  ADJUST_TRANSLATION  = 0x04,
+  // Note: Use power of two values in order to use bitwise operators.
+  NONE                = 1,     // Extrinsic parameters will be considered as FIXED
+  ADJUST_ROTATION     = 2,
+  ADJUST_TRANSLATION  = 4,
   ADJUST_ALL = ADJUST_ROTATION | ADJUST_TRANSLATION
 };
 

src/openMVG/sfm/sfm_data_io.hpp

@@ -21,11 +21,12 @@ struct SfM_Data;
 
 enum ESfM_Data
 {
-  VIEWS           = 0x01,
-  EXTRINSICS      = 0x02,
-  INTRINSICS      = 0x04,
-  STRUCTURE       = 0x08,
-  CONTROL_POINTS  = 0x16,
+  // Note: Use power of two values in order to use bitwise operators.
+  VIEWS           =  1,
+  EXTRINSICS      =  2,
+  INTRINSICS      =  4,
+  STRUCTURE       =  8,
+  CONTROL_POINTS  = 16,
   ALL = VIEWS | EXTRINSICS | INTRINSICS | STRUCTURE | CONTROL_POINTS
 };