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L_PlaneBitmap

Summary

Places the bitmap on parallel planes along the Z-axis.

Syntax

#include "l_bitmap.h"

L_LTIMGSFX_API L_INT L_PlaneBitmap(pBitmap, ptCenterPoint, uZValue, nDistance, uPlaneOffset, nRepeat, nPydAngle, uStretch, uStartBright, uEndBright, uBrightLength, crBright, crFill, uFlags)

Parameters

pBITMAPHANDLE pBitmap

Pointer to the bitmap handle referencing the bitmap to be changed.

POINT ptCenterPoint

POINT structure that contains the point at which the camera or viewer is looking. 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 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. 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 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 shows the effect of placing bitmaps on planes along the Z-axis. 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.

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 in the Document and Medical Imaging toolkits.

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

For an example, click here

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

CenterPoint(x,y)= (320,256)
uZValue = 0
nDistance= 256
uPlaneOffset= 256
nRepeat= -1
nPydAngle= 0
uStretch= 100
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 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Plane Function - Before

Plane Function - After

View additional platform support for this Plane 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 PlaneBitmapExample(L_VOID) 
{ 
   L_INT nRet; 
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle for the image */ 
   POINT CenterPt; 
 
   /* Load a bitmap at its own bits per pixel  */ 
   nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("sample5.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if (nRet != SUCCESS) 
      return nRet; 
 
   /* put the image on left and right parallel planes*/ 
   CenterPt.x = LeadBitmap.Width / 2; 
   CenterPt.y = LeadBitmap.Height / 2; 
 
   nRet = L_PlaneBitmap(&LeadBitmap, CenterPt, 0, LeadBitmap.Height, LeadBitmap.Width / 2, -1, 0, 25, 0, 100, 20000, RGB(255, 0, 0), RGB(0, 0, 0), PLANE_RIGHT | PLANE_LEFT | PLANE_FILL_CLR); 
   if (nRet != SUCCESS) 
      return nRet; 
 
   nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); 
   if (nRet != SUCCESS) 
      return nRet; 
 
   //free bitmap 
   if (LeadBitmap.Flags.Allocated) 
      L_FreeBitmap(&LeadBitmap); 
 
   return SUCCESS; 
}