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LBitmap::PlaneBend

Summary

Places the bitmap on parallel planes along the Z-axis, and bends the planes toward the center point.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::PlaneBend(ptCenterPoint, uZValue, nDistance, uPlaneOffset, nRepeat, nPydAngle, uStretch, uBendFactor, uStartBright, uEndBright, uBrightLength, crBright, crFill, uFlags)

Parameters

POINT ptCenterPoint

POINT structure that contains the point at which the camera or viewer is looking. This is also the point toward which the bitmaps will be bent. It may be outside the bitmap borders.

L_UINT uZValue

Viewing screen offset on the Z-axis, in pixels.

L_INT nDistance

Camera distance from the viewing screen, in pixels.

L_UINT uPlaneOffset

Distance between the parallel planes.

L_INT nRepeat

Number of times the bitmap repeats along the Z-axis. If nRepeat equals 1 the bitmap will be infinitely repeated. Its range starts from 1.

L_INT nPydAngle

The view angle, off the Z-axis. This value is given in hundredths of a degree (+/-). This can be a number from 0 to 36,000.

L_UINT uStretch

Value that indicates whether to expand or compress the bitmap, and by how much. If uStretch < 100 bitmap will be expanded. If uStretch > 100 the bitmap will be compressed. Use 100 to maintain the bitmap's dimensions. The value of this parameter is internally divided by 100.

L_UINT uBendFactor

Determines the planes bending value. The range starts at 100 and increases indefinitely. If uBendFactor equals 100 the planes will not be bent.If uBendFactor > 100 planes will be bent. The value of this parameter is internally divided by 100.

L_UINT uStartBright

Value that indicates the brightness of an external light source on the first bitmap displayed. Possible values range from 0 to 100. A value of 0 indicates no external light displayed on the bitmap. A value of 100 indicates an external light source with full brightness is displayed on the bitmap.

L_UINT uEndBright

Value that indicates the brightness of an external light source on the last bitmap displayed. Possible values range from 0 to 100. A value of 0 indicates no external light displayed on the bitmap. A value of 100 indicates an external light source with full brightness is displayed on the bitmap.

L_UINT uBrightLength

Value that indicates how much the brightness changes as you move along the Z axis. This parameter is internally multiplied by 50.

COLORREF crBright

The COLORREF value that specifies the color of an external light source that shines on the displayed bitmaps.

COLORREF crFill

The COLORREF value that specifies the background color.

L_UINT uFlags

Flags that indicate the background color and the planes to be shown. You can use a bit wise OR ( | ) to specify one flag from each group.

The following are the flags that indicate the background color:

Value	Meaning
PLANE_FILL_CLR	[0x0001] Use the crFill as a background color.
PLANE_NO_CHG	[0x0002] Use the image itself as a background

The following are the flags that indicate which planes (with respect to the Z-axis) will be shown. You can use a bit wise OR ( | ) to specify more than one plane. However, you can only combine PLANE_LEFT with PLANE_RIGHT or PLANE_UP with PLANE_DOWN.

Value	Meaning
PLANE_LEFT	[0x0010] The plane will be displayed to the left of the Z-axis.
PLANE_RIGHT	[0x0020] The plane will be displayed to the right of the Z-axis.
PLANE_UP	[0x0040] The plane will be displayed above the Z-axis.
PLANE_DOWN	[0x0080] The plane will be displayed below the Z-axis.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This function shows the effect of placing bitmaps on planes along the Z-axis and bending them toward a specific point. These bitmaps may be placed above, below, to the left or to the right of the Z-axis. An external light source of the specified color and brightness may be shined on the bitmaps. The brightness may vary along the z-axis according to the uBrightLength value. The line of bitmaps may be bent toward a specified point by setting a bending value in the uBendFactor parameter.

By changing ptCenterPoint and the viewing screen Z-offset, you can simulate moving along the axis.

If the bitmap has a region, 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.

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.

For an example, click here

To obtain this effect, the following settings were used with the function:

CenterPoint(x,y)= (640,256)
uZValue = 0
nDistance= 256
uPlaneOffset= 256
nRepeat= -1
nPydAngle= 0
uStretch= 100
uBendFactor= 500
uStartBright= 0
uEndBright= 0
uBrightLength= 50
crBright= RGB(255,255,255)
crFill= RGB(0,0,0)
uFlags= PLANE_FILL_CLR|PLANE_DOWN

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.

Plane Bend Function - Before

Plane Bend Function - After

View additional platform support for this Plane Bend 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.

Example

L_INT LBitmap__PlaneBendExample(LAnimationWindow *BitmapWindow)  
{ 
   
   POINT  CenterPt;  
   CenterPt.x  =  BitmapWindow->GetWidth()/2;  
   CenterPt.y  =  BitmapWindow->GetHeight()/2;  
    
   return BitmapWindow->PlaneBend( CenterPt, 0, BitmapWindow->GetHeight(), BitmapWindow->GetWidth()/2, -1,450, 25,40,10,0, 200, RGB(255,0,0), RGB(0,0,0), PLANE_DOWN | PLANE_UP | PLANE_FILL_CLR);  
 
}