LBitmap::Polar (original) (raw)

Summary

Converts the bitmap from rectangular to polar coordinates and vice versa.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::Polar(crFill, uFlags)

Parameters

COLORREF crFill

The COLORREF value that specifies the fill color for any exposed areas. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color.

L_UINT uFlags

Flags that indicate how to handle exposed areas and the type of conversion. You can use a bitwise OR ( | ) to specify one flag from each group.

The following are the flags that indicate how to handle exposed areas:

The following are the flags that indicate the conversion type:

Returns

Comments

This function converts a bitmap from Cartesian (rectangular) coordinates to polar coordinates or vice versa. Rectangular coordinates use the form (x, y) where x and y are the horizontal and vertical distances from the origin, respectively. Polar coordinates are in the form (r, ) where r is the distance from the origin to the point and Ȓ is the angle of the line the point makes with the positive x-axis. Polar coordinates use a grid made of concentric circles around the origin, along with lines that are rays radiating outward from the origin.

If CART_TO_POL is set, this function considers the positions of the images pixels as values in a Polar coordinate system. Then it converts all the pixels in a line of the source image into a circle around the center of the bitmap.

If POL_TO_CART is set, this function takes the pixels from concentric circles and considers their positions as values in a Cartesian coordinate system. Then it converts all the pixels in a circle into horizontal lines.

If there is any region selected on the bitmap, the effect will be applied on the region dimensions only.

This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.

This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Polar Function - Before

Polar Function - After

View additional platform support for this Polar function.

Required DLLs and Libraries

• LTIMGSFX
• For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

See Also

Functions

• LBitmap::BricksTexture
• LBitmap::Canvas
• LBitmap::Clouds
• LBitmap::ColoredBalls
• LBitmap::DiffuseGlow
• LBitmap::DisplaceMap
• LBitmap::Fragment
• LBitmap::HalfTonePattern
• LBitmap::MaskConvolution
• LBitmap::MosaicTiles
• LBitmap::Offset
• LBitmap::Perspective
• LBitmap::PlasmaFilter
• LBitmap::Pointillist
• LBitmap::RomanMosaic
• LBitmap::Vignette
• LBitmap::ZigZag
• LBitmap::AddNoise
• LBitmap::Emboss
• LBitmap::Mosaic
• LBitmap::MotionBlur
• LBitmap::Oilify
• LBitmap::Posterize
• LBitmap::RemoveRedeye
• LBitmap::Solarize
• LBitmapBase::Underlay
• LDialogImageEffect::DoModalPolar
• LBitmap::Bending
• LBitmap::Cylindrical
• LBitmap::FreeHandShear
• LBitmap::Impressionist
• LBitmap::FreeHandWave
• LBitmap::Pixelate
• LBitmap::Punch
• LBitmap::RadialBlur
• LBitmap::RadWave
• LBitmap::Ripple
• LBitmap::Spherize
• LBitmap::Swirl
• LBitmap::Wave
• LBitmap::Wind
• LBitmap::ZoomBlur
• LBitmap::ZoomWave

Topics

• Raster Image Functions: Doing Geometric Transformations
• Processing an Image
• Applying Artistic Effects
• Using Color Values in LEADTOOLS

Example

L_INT LBitmap__PolarExample(LAnimationWindow * LAniWnd) { return LAniWnd->Polar(0, FILL_RPT | CART_TO_POL); }

LEADTOOLS Raster Imaging C++ Class Library Help