update_window_poseT_update_window_poseUpdateWindowPoseUpdateWindowPoseupdate_window_pose (Operator)

Name

update_window_poseT_update_window_poseUpdateWindowPoseUpdateWindowPoseupdate_window_pose — Modify the pose of a 3D plot.

Signature

Description

The operator update_window_poseupdate_window_poseUpdateWindowPoseUpdateWindowPoseUpdateWindowPoseupdate_window_pose provides an easy way to modify the pose of the height field displayed by disp_objdisp_objDispObjDispObjDispObjdisp_obj if the paint mode is set to '3d_plot'"3d_plot""3d_plot""3d_plot""3d_plot""3d_plot" using set_paintset_paintSetPaintSetPaintSetPaintset_paint.

Two window coordinates (LastRowLastRowLastRowLastRowlastRowlast_row,LastColLastColLastColLastCollastCollast_col) and (CurrentRowCurrentRowCurrentRowCurrentRowcurrentRowcurrent_row, CurrentColCurrentColCurrentColCurrentColcurrentColcurrent_col) are transformed into rotation, scaling, or movement depending on ModeModeModeModemodemode. This window coordinates must be provided with respect to the current image part. As a consequence, this coordinates are subpixel coordinates. Given the current image part (row1,column1,row2,column2), the upper left corner corresponds to the coordinate (row1 - 0.5, col1 - 0.5). Accordingly, the bottom right corner corresponds to the coordinate (row2 - 0.5, col2 - 0.5). Use get_mposition_sub_pixget_mposition_sub_pixGetMpositionSubPixGetMpositionSubPixGetMpositionSubPixget_mposition_sub_pix or get_mbutton_sub_pixget_mbutton_sub_pixGetMbuttonSubPixGetMbuttonSubPixGetMbuttonSubPixget_mbutton_sub_pix to obtain this coordinates directly.

If ModeModeModeModemodemode is set to 'rotate'"rotate""rotate""rotate""rotate""rotate", the height field is rotated using a virtual trackball model. Both points are projected on a sphere centered in the center of the window WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle. The circular arc between this two projections corresponds to the rotation applied to the height field.

If ModeModeModeModemodemode is set to 'scale'"scale""scale""scale""scale""scale", zooming is reduced if CurrentRowCurrentRowCurrentRowCurrentRowcurrentRowcurrent_row is greater than LastRowLastRowLastRowLastRowlastRowlast_row and increased if CurrentRowCurrentRowCurrentRowCurrentRowcurrentRowcurrent_row is smaller than LastRowLastRowLastRowLastRowlastRowlast_row.

If ModeModeModeModemodemode is set to 'move'"move""move""move""move""move", the input points are projected onto the plane through the center of the height field parallel to the viewing plane. The center of the height field is moved in this plane by the distance between both projections.

If ModeModeModeModemodemode is set to 'move_plane'"move_plane""move_plane""move_plane""move_plane""move_plane", the input points are projected on the plane given by height zero. The height field is moved in this plane by the distance between both projections.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

Parameters

Example (HDevelop)

* Interactive display of a height field
dev_set_paint ('3d_plot')
while (1)
  dev_set_check ('~give_error')
  get_mposition_sub_pix (WindowHandle, Row, Column, Button)
  dev_set_check ('give_error')
  if (ButtonDown and (Button == 0))
    ButtonDown := false
  endif
  if (not(Button == 0))
    if (ButtonDown)
      if (Button == 1)
        mode := 'rotate'
      endif
      if (Button == 4)
        mode := 'scale'
      endif
      if (Button == 5)
        mode := 'move'
      endif
      update_window_pose (WindowHandle, lastRow, lastCol, Row, Column, mode)
    else
      if (Button == 2)
        break
      endif
      ButtonDown := true
    endif
    lastCol := Column
    lastRow := Row
  endif
  dev_display (Image)
endwhile

Possible Predecessors

set_paintset_paintSetPaintSetPaintSetPaintset_paint, open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window, get_mposition_sub_pixget_mposition_sub_pixGetMpositionSubPixGetMpositionSubPixGetMpositionSubPixget_mposition_sub_pix, get_mbutton_sub_pixget_mbutton_sub_pixGetMbuttonSubPixGetMbuttonSubPixGetMbuttonSubPixget_mbutton_sub_pix

Possible Successors

disp_imagedisp_imageDispImageDispImageDispImagedisp_image

See also

unproject_coordinatesunproject_coordinatesUnprojectCoordinatesUnprojectCoordinatesUnprojectCoordinatesunproject_coordinates

Module

Foundation