xplot_04_3d_hc

4 Working in 3D Xplot

Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23D Xplot Cursor Tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33D Xplot Plane coloring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Changing the 3D View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Rotate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Swap and Mirror Axes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Slicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Volume and Planes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Filter Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Accumulation Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103D Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Paradigm™ Rock & Fluid Canvas™ 2009 | Epos™ 4.0 Working in 3D Xplot 4-1

Overview

Once a crossplot has been created as described in “Formatting Xplots” on page 2-1, a 3D crossplot view is created by entering a log or expression on the Z Axis tab of the Properties dialog box (see “X, Y, and Z Axes” on page 2-4). As noted in “Formatting Xplots” on page 2-1, not all crossplot options (e.g. Functions) are available/applicable when in 3D view.

Fig. 1 is shows examples of 3D views, and identifies the components relevant to a 3D view.

Fig. 1: Examples of 3D crossplots

Plane ("flat" squares)Volume Elements (cubes)

3D View icon

X Axis =NPHIY Axis =RHOBZ Axis =GRColor Axis =GR

X Axis =NPHIY Axis =RHOBZ Axis =LLSColor Axis =GR

Color Axis Z Axis

Working in 3D Xplot 4-2Paradigm™ Rock & Fluid Canvas™ 2009 | Epos™ 4.0

3D Xplot Cursor Tracking

Cursor tracking is automatically performed on the data under the mouse pointer and the data is displayed in the Position dialog box. If the mouse pointer is on an axis plane, the co-ordinates of that position on the axis plane are tracked. If the mouse pointer is on a volume element of the 3D image, the co-ordinates of that volume element are tracked as shown in Fig. 2.

Fig. 2: Cursor tracking details displayed when cursor is on a volume element (cube)

3D Xplot Plane coloring

The colouring on each of the planes is done by re-accumulating the 3D data in each of the 2D planes. The minimum, maximum, and average of the colour expression in each cell are all re-accumulated into each cell of the three 2D axis planes.

The colouring will show the minimum, maximum, or average of the colour expression as entered in the Display Value field on the “Color” on page 2-11 tab of the Properties dialog box. This may cause some confusion when there is data outside the range of the 3D volume defined by the axis limits. Only the data inside the displayed 3D volume is accumulated onto the three 2D axis planes. So the minimum, maximum, or average of all possible values in the stack are shown but only for that part of the stack that falls within the 3D viewing volume.


The same data displayed on a 2D Xplot may look quite different on a 3D Xplot due to the limits expressed on the Z axis.


Changing the 3D View

Use the mouse, and/or Tools and View menus to adjust a 3D crossplot display.

NOTE To quickly remove the grids from the view, toggle View > “Grid” on page 3-17.

Rotate

A 3D view can be graphically rotated to any desired angle using the middle mouse button, or non-graphically rotated to any angle by entering specific rotation angles in the 3D View dialog box.

To graphically rotate the view1. Click and hold on the display with the middle mouse button.

2. Slowly drag the mouse left, right, up or down to change the view angle—see Fig. 3.

To non-graphically rotate the view

1. Click the 3D View icon (on the “Display Bar” on page 1-12) or select View > 3D View... to open the 3D View dialog box.

2. Ensure the View tab is selected.

3. Rotate the view using one of the following methods:

— enter the required degrees in the horizontal field and click the button, repeat for the vertical field

— click on one of the rotation arrow buttons to change the angle in 1 degree increments.

— click and hold on one of the rotation arrow buttons until the required rotation is achieved.

NOTE If multiple views are open, clicking on the Sync button will set all views to the view angle set in the current view.

Enter these values, -45 and 60, to return to Geolog’s default view.

Horizontal field

Vertical field

Horizontal Arrow button

Vertical Arrow button

Left/Right Rotation buttons

Up/Down Rotation buttons


Example

Fig. 3: Graphically rotating the view

Swap and Mirror Axes

Use the Tools menu to swap X and Y, or use the 3D View dialog box to swap any combination of X, Y and Z, or mirror any axes.

To swap X and Y axes only

• Click the 3D View icon or select Tools > Swap Axes

ORIGINAL view. ROTATED view.


To sway any of the 3 axes1. To swap any of the 3 axes (X, Y and Z), select View > 3D View... to open the Xplot 3D View

dialog box (or click on the icon on the “Display Bar” on page 1-12).

2. Click on the Axes tab.

3. Click the appropriate Swap toggle button to swap the:

— X and Y axes

— X and Z axes

— Y and Z axes

To mirror axes

1. Click the 3D View icon or select View > 3D View... to open the 3D View dialog box.

2. Click on the Axes tab.

3. Use the TOGGLE buttons to mirror an axis.

Slicing

The Slicing mode on the 3D View dialog box enables trimming of the data volume to reveal its internal structure. This is a display function only, however, once the 3D Slice of data has been selected, data can then be deleted inside or outside the Slice. Slicing can also be used to select a volume of 3D data for highlighting.

See Also

“Remove Data using a 3D Slice” on page 3-59

“Highlight 3D Slice” on page 3-68

To use the Slicing mode

1. Click the 3D View icon (on the “Display Bar” on page 1-12) or select View > 3D View... to open the Xplot 3D View dialog box.

2. Click on the Slice tab.

Swap toggle buttons

Mirror toggle buttons


3. Toggle ON Slicing Mode—red control lines and points appear on the borders of the display box.

4. If required, Hide or move the 3D View dialog box.

5. Select one of the control points or lines and drag to remove the required data from view.

6. To redisplay all data, in the 3D View dialog box:

— toggle OFF Slicing Mode (toggle back on to redisplay modifications),

Or

— click Reset Slice (modifications are removed)

See Fig. 4 for an example of adjusting the volume display.


Example

Fig. 4: Adjusting the display of the data volume (3D slice)

ORIGINAL view - Slicing Mode toggled ON. Z axis control line dragged down to remove the volume data displayed.


Volume and Planes

The “Filter” on page 2-30 tab on the Properties dialog box is used to filter the data, vary the resolution of the x,y, and z axes, set a display drop threshold, set a light source, and toggle the volume and planes display, as required (see Fig. 1 for identification of volume and plane).

See Also

"Slicing" on page 4-7

Filter Data

Enter a filter expression to filter the display of volume and plane data.

To filter the data

1. Click the Properties button or select Edit > Properties... to display the Properties dialog box.

2. Click on the Filter tab and enter the required filter expression—see “Filter” on page 2-30 for detailed information on using filter expressions.

Accumulation Options

Within the accumulation section you can vary the resolution of the x,y, and/or z axes and set a display drop threshold which changes the way the data is displayed.

Cells with count values (frequencies) equal to or less than the Drop Threshold are displayed using the Transparent Cell Border Appearance (set in the 3D section).


To adjust the grid resolution of a 3D display


2. Click on the Filter Tab.

3. Change the values as required in the Axis bins.

4. Click OK.

To view which cells have frequencies below or equal to a drop threshold



3. In the Drop Threshold field enter a value so that cells with count values (frequencies) equal to or less than this value are displayed using the Transparent Cell Border Appearance (set in the 3D section).

4. Click in the Transparent Cell Border Appearance field to display the “Appearance Palette” on page 4-3.

Axis bins


5. Format the line style and color of the transparent volume (cubes) so that cells with count values (frequencies) equal to or less than the threshold are displayed in the color and line style specified.

6. Click OK.

See Fig. 5 for an example of a 3D crossplot displayed using a Drop Threshold.

Example

Fig. 5: Volume (cubes) display when value for Drop Threshold is specified

3D Formatting

The Volume and/or Planes display can be removed, and the border appearance of volume cubes can be adjusted, as required.


To edit the 3D format settings



3. Set the 3D filter options as described in Table 4-1, "Filter Tab - 3D Section Components" on page 4-13.

Filter Tab - 3D Section

Table 4-1: Filter Tab - 3D Section Components

Field / Button Description

Light Source Select the required light source (shading) to exaggerate the relief of the image. If OFF is selected, true colors are displayed; all other options add a light source from the direction specified.

PlanesVolume

Toggle OFF these checkboxes to remove the volume and/or plane display.


Opaque Cell Border Appearance

Click in this field to display the “Appearance Palette” on page 4-3 to format the border line style and color of the volume (cubes).

Transparent Cell Border Appearance

The volume transparency attribute. Click in this field to display the “Appearance Palette” on page 4-3 and format the line style and color of the transparent volume (cubes) which is displayed when using:• the Drop Threshold —cells with count values (frequencies)

equal to or less than the threshold are displayed in the color and line style specified. See Fig. 5.

• “Highlight” on page 3-61; the volume outside the highlighted area is displayed in the color and line style specified. See Fig. 6 which shows an example of the transparent volume cell border used in conjunction with highlighting areas.

Table 4-1: Filter Tab - 3D Section Components

Field / Button Description


Example

Fig. 6: Volume display when using highlighting

Highlighted area in Histogram and Xplot shown in green.

Orange (color specified for Transparent Cell Border Appearance) is used to display volume cubes outside highlighted area.


Index

Numerics3D crossplot

coloring of the planes 3components 2cursor tracking 3opaque/transparent cell border 14remove data from display 12synchronize views 5trim data 7

Ccursor tracking, 3D crossplot 3

Pplanes coloring, 3D crossplot 3

Ssynchronize

3D crossplot views 5


xplot_04_3d_hc

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