PictureEffects Xojo Plugin |

# PolarCoordinatesEffect Class

Use this class to transform polar coordinates to rectangular coordinates or rectangular coordinates to polar coordinates.
This effect is sometimes used to map images taken by a 360 degree ceiling camera to image that humans can understand.
This class supports use of multiple CPU cores on MacOS X, Windows and Linux systems.

MPImageFilter
PolarCoordinatesEffect

class PolarCoordinatesEffect implements

IGraphicsEffect

#### Properties

BackColor | Sets back color to fill the area around the circle when doing rectangular to polar transform.
FlipMapping | Sets direction of the mapping
RectangularToPolar | Decides if doing polar to rectangular or rectangular to polar transform.
CPUCoreCount (Inherited) (console safe) | Returns number of detected CPU cores on the running machine.
ErrorCode (Inherited) (console safe) | Returns error code after applying the effect. This value is a Constant defined in the PictureEffectsError module.
MultiprocessingHint (Inherited) (console safe) | Use this property to fine tune CPU usage for this algorithm. By default this property is set to zero (Automatic). This property accepts all constants that are defined in this class.
ProgressHandler (Inherited) (console safe) | Use this property to use a progress class to get progress feedback from this function. This class must be a class that Implements the IProgressHandler Interface which is defined in this plugin.

#### Methods

Apply | Applies the effect on a given 32 bit source image with parameters that have been set on the class instance.
Apply | Applies the effect on a given 32 bit source image with a given 32 bit mask and returns the result to a new image.

#### Constants

CPU_USE_MACHINE_CORE_COUNT = -1 (Inherited) | Uses exactly the number of available CPU cores in the machine. (Available here means on-line CPU cores, some laptops can put CPU cores off line in low battery situations)
CPU_USE_AUTOMATIC = 0 (Inherited) | Takes into account number of available CPU cores on the Machine and also tries to select the fastest way based on developer rating for each algorithm and picture size. (In simple algorithms then the fastest path is sometimes 2 or 3 CPU cores and not 4 CPU cores because of the overhead of managing multiple cores). In more complex algorithms then 3 or 4 cores are almost always faster than 2 cores.
CPU_USE_1_CORE = 1 (Inherited) | Uses one CPU core.
CPU_USE_2_CORES = 2 (Inherited) | Uses two CPU cores. This setting will also work on machines with less than two CPU cores, but it will be slower or best case same speed as using the correct setting for such machine.
CPU_USE_3_CORES = 3 (Inherited) | Uses three CPU cores. This setting will also work on machines with less than three CPU cores, but it will be slower or best case same speed as using the correct setting for such machine.
CPU_USE_4_CORES = 4 (Inherited) | Uses four CPU cores. This setting will also work on machines with less than four CPU cores, but it will be slower or best case same speed as using the correct setting for such machine.
CPU_USE_5_CORES = 5 (Inherited) | Uses five CPU cores. This setting will also work on machines with less than four CPU cores, but it will be slower or best case same speed as using the correct setting for such machine.
CPU_USE_6_CORES = 6 (Inherited) | Uses six CPU cores. This setting will also work on machines with less than four CPU cores, but it will be slower or best case same speed as using the correct setting for such machine.
CPU_USE_7_CORES = 7 (Inherited) | Uses seven CPU cores. This setting will also work on machines with less than four CPU cores, but it will be slower or best case same speed as using the correct setting for such machine.
CPU_USE_8_CORES = 8 (Inherited) | Uses eight CPU cores. This setting will also work on machines with less than four CPU cores, but it will be slower or best case same speed as using the correct setting for such machine.

#### Supported Platforms:

- MacOS X Carbon
- MacOS X Cocoa 32 bit
- MacOS X Cocoa 64 bit
- Windows 32 bit
- Windows 64 bit
- Linux 32 bit
- Linux 64 bit
- Linux ARM