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Part 5 - Apply Warp Vectors - continued.
Click on the "Show List" button. A window appears showing the list of all current warp vectors. Each line represents one vector, represented as (X1 Y1 Z1 X2 Y2 Z2). For XY vectors, Z1 = Z2 = 0. For Z vectors, X1 = X2 and Y1 = Y2. Note that an ASCII file with values in this format can be loaded via the "File / Warp Vectors -> Load" menu. This can be useful for importing large quantities of scattered Z height values from a 3D digitizer or other sources. In addition, a simple ASCII file containing three columns of numbers of the form (X, Y, dZ) can be loaded as Z warp vectors for subsequent triangulation and griding via the "Apply Z Warp" button. Close the warp vector list window.
The warp vector "Move/Stretch" mode can be used to reposition existing vectors. Click and drag the left mouse button near either end of an XY vector to stretch it. Click and drag the right mouse button near an XY vector to translate it. Click the left mouse button near a Z vector to change it's height to the value currently entered in the vector "Z Height" field. Click and drag the right mouse button near a Z vector to translate it in the XY plane. The "Delete" mode can be used to delete individual vectors. In this mode, click on the sculpture grid and the nearest vector/point is deleted.
Part 6 - Display Control.
Change the main mode from "Warp" to "Display". A new set of widgets will appear at the left side of the window. The yellow line on the "Light Vector" circle represents the current illumination direction. During interactive sculpting, it is beneficial to frequently change the lighting direction to help see hidden contours in the surface. The Light Vector circle is actually a "dome". Positioning the light source at the exact center will cause the light to shine straight down on the surface. Normally, a light vector that is closer to the edge of the circle will better reveal the true shape of the sculpted surface. Click and drag the left mouse button on the Light Vector circle to position the light vector near the left edge of the circle. Note the difference in the way the sculpture grid is illuminated. The Light Vector can also be typed directly into the text field just below the circle.
The "Z Height Shade Range" should normally be set to the minimum and maximum height values in the sculpture grid. But different ranges can be entered to emphasize or de-emphasize the appearance of the surface relief. Enter the values 0, 0.1 and then press the "Enter" keyboard key or move the cursor into the sculpture grid window. The surface will be rendered with exaggerated relief.
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