SketchUp

Detailing a TIN

1. Create a TIN. The image (slide 1) shows a flat TIN or sandbox created with the Sandbox From Scratch tool.
2. Select the Add Detail tool. The cursor changes to an arrow.
3. Click on a point, edge, or face within the TIN. SketchUp creates a new vertex where you clicked with new triangles spanning out from the new vertex. The image (slide 2) shows two additional triangles created when the midpoint of a line was selected.
4. Move your mouse up or down to adjust the height of the vertex and surrounding triangles. The image (slide 3) shows the resulting TIN when the new vertex was lifted.


Note: You can also type in an offset distance to adjust the height of the vertex after clicking on a point, edge, or face within the terrain. For example, 10' will raise the new vertex 10' above the starting terrain.


Note: You can sculpt in a direction other than vertical by holding down the Shift key while moving the mouse. However, this operation can result in non-functional terrain or terrain that can no longer be manipulated in a known way.


5. Continue clicking on points, edges, or faces (either on the TIN you created in step 3, or on other portions of the TIN) to create additional triangles for manipulation.
6. Smooth and soften the TIN to get your final surface.