### Face Colormap COPOPER

Pointcloud Operator dialog box - Face Colormap Operator

The CAD model is shaded according to the deviations of the cloud of points compared to CAD using the colors defined in the Edit Dimension Color dialog box and the tolerance limits specified in the Upper tolerance and Lower tolerance boxes discussed below.

The colors used for the color map are defined in Edit Dimension Color dialog box, which is accessed by clicking Edit | Graphics Display Window | Dimension Color.

You can view the color scale from the Dimensions Colors window by selecting the View | Other Windows | Dimensions Colors menu item.

Applying the Face Colormap operation to a Pointcloud can be done by clicking the Pointcloud Surface Color Map button from the Pointcloud toolbar or by selecting the Insert | Pointcloud | Surface Colormap menu item.

Example of a Face Colormap applied to selected CAD Elements

The Face Colormap Operator uses the following options:

Upper tolerance - This defines the upper limit a value can be. For example, an upper tolerance of .03 allows the measured value to go above the nominal value by .03 and still be considered in tolerance.

Lower tolerance - This defines the lower limit a value can be. For example, a lower tolerance of .04 allows the measured value to go below the nominal value by .04 and still be considered in tolerance.

Refine Factor - This adjusts the accuracy of the Face colormap. If you change this value, PC-DMIS draws a new, changed colormap. The underlying measured data does not change. The colormap tessellates the CAD model with an overlay of colored triangles. The vertices of each triangle is colored with the color that corresponds to its deviation from the pointcloud. The colors are taken from the dimensions colors scale discussed above. By using a smaller or larger refine factor value, you can generate a finer or coarser tessellation respectively. You may want to decrease the refine factor to obtain a smoothly shaded cad with a more accurate deviation representation. However, setting a smaller refine value results in a larger number of triangles, thereby increasing the computation time and the size of the CAD model. For comparison, note that the number of triangles for a refine factor of 0.5, compared to a refine factor of 1.0, is about 4 times more; whereas a refine factor of 0.1 compared to 1.0, is about 100 times more.

Sample Showing Refine Factor of 1:

Sample Showing Refine Factor of 0.1:

Max Distance - This value discards the effect on the colormap of points located at a distance greater than the specified Max Distance.

Thickness - This adds a thickness value to deviations on the colormap. This is useful if you want to add a material thickness to a CAD surface model.

No Data Color - When this option is selected, the specified color is mapped to the surface where there is no data.

Clicking Create inserts a COPOPER/FACE COLORMAP command into the Edit Window like the following examples:

COPOPER1 =COP/OPER,FACE COLORMAP,PLUS TOLERANCE=0.25,MINUS TOLERANCE=-0.25,THICKNESS=0

REF,COP1,,