TUTORIAL 07: RHINO STEREOTOMIC MODELING PART 2. By Jeremy L Roh, Professor of Digital Methods I UNC Charlotte s School of Architecture

Transcription

1 TUTORIAL 07: RHINO STEREOTOMIC MODELING PART 2 By Jeremy L Roh, Professor of Digital Methods I UNC Charlotte s School of Architecture

2 This tutorial will explore the Stereotomic Modeling Methods within Rhinoceros and will depict complex stereotomics. Other tutorials will venture into the tectonic realm. Stereotomic Modeling Part 2 will use the following toolbars (occasionally, a few other toolbars will be required and will be identified as needed).

3 Just as 2D lines and curves can be manipulated with trims, edits, fillets, and chamfers, Rhinoceros also allows surfaces and solids to be manipulated with similar commands. STEP 1: Select the Variable Radius Fillet command.

4 STEP 2: Select an edge of the solid to fillet and press ENTER.

5 Once the edge is selected, each side will contain handle points set at a default setting. In this case, the default is 1-0. STEP 3: Left-click on the handle point.

6 STEP 4: Drag the mouse to set a new fillet radius for this edge.

7 STEP 6: Repeat the previous steps for the handle point on the other side of the edge. Since this is a variable radius fillet command, your radi can be equal to one another or could be separate values. STEP 5: If you prefer to be more precise, once you have left-clicked on the handle point, you can enter in a value in the command line that will correspond to the value displayed on the screen next to the handle point.

8 The result is a rounded edge of the solid.

9 The Variable Radius Chamfer command works in a similar manner with the result being an angled edge instead of a radius.

10

11 STEP 2: Select a cutting curve. This curve needs to already have been drawn in the model space. This curve can be free floating; however, it needs to be in a position that will overlap the solid you wish to cut. STEP 3: Select the surface or polysurface (solid) that you wish to cut. Rhinoceros offers many solid editing tools that allow you to shape and mold your objects and forms. The wirecut command works in a similar manner as if you were slicing a solid chunk of clay with a wire. STEP 1: Select the WireCut command.

12 STEP 4: The curve that you select in STEP 2 will now show an extrusion path. Select a point in space to determine the depth of the cut.

13 If you would like the other part of the solid to be cut away, select Flip from within the paranthesis in the command line. If KeepAll is equal to Yes, then the wire cut will just split the object. You will then have to manipulate the parts from there. If KeepAll is equal to No, then the portion that is highlighted will be deleted or Cut Away. STEP 5: Rhinoceros will highlight a portion of the solid. The highlighted area will be the area cut away if you accept by pressing ENTER.

14 Faces of a solid can also be moved to other positions within the model space. STEP 1: Select Move Face.

15 STEP 2: Select the face or Surface to Move. STEP 3: Select the point to move from. In this case, I have snapped to the End point at the lower left corner. STEP 4: Select the point to move to.

16 The solid has now been adjusted to meet the new position of the face that has been moved.

17 Faces can also be extruded on a solid. The difference between extruding a face and moving a face is that moving a face will readjust the solid to meet the new position of the face; whereas, extruding a face will just add onto the solid. STEP 1: Select the Extrude Face command.

18 STEP 3: Enter an extrusion distance or pick a point in space. STEP 2: Select the face of the solid that you wish to extrude.

19 The face has been extruded. Instead of moving or extruding faces, you can also just manipulate the solid edges. STEP 1: Select the Move Edge command.

20 STEP 3: Select the the point to move from. STEP 2: Select the edge to move. STEP 4: Select the the point to move to.

21 The solid has now been readjusted to meet the new position of the moved edge.

22 Perform a Variable Radius Chamfer on the recently moved edge.

23

24 In order to further work with and manipulate polysurfaces (solids), you need to extract 2D information to then use for the further development of your 3D form. STEP 1: Select the Duplicate Edge command. The Curve From Object tools will be utilized at this point.

25 STEP 2: Select all the edges of the solid to form a continuous edge. The next slides show the selection process.

26

27

28

29

30 STEP 3: Press ENTER when done. The lines will stay highlighted until you press ENTER again or ESC. For this tutorial, keep the lines highlighted.

31 STEP 4: Press the Join command to make each individual edge into one continuous line.

32 STEP 5: Pull out the Curve Tools toolbar flyout and select the Offset Curve command.

33 STEP 6: Select the previously joined curve edge that was duplicated in STEP 2.

34 STEP 8: Enter a distance to offset such as 16 and press enter. STEP 7: Minimize the Perspective view so that we can pick the side to offset in a 2D elevation view such as the Right view. STEP 9: Select (leftclick) the inner side of the curve to offset the curve within the solid.

35 This offset curve will allow us to cut away a detailed portion of the solid. In order to do this, though, we need to ensure that the bottom edge of the curve extends below the lowest portion of the solid form. STEP 10: Select Duplicate Edge

36 STEP 11: Select the bottom edge of the solid and press Enter when done.

37 STEP 13: With the duplicated line still selected, select the Move command. STEP 12: Minimize the Perspective view so that we can move the line down in the Z-plane in an 2D elevation view such as the Front view. STEP 14: Select the Point to move from STEP 15: Select the Point to move to

38 STEP 16: Select the Extend Curve command

39 STEP 17: Select the curve that was just moved as the Boundary Object. STEP 18: Select the previously offset curve as the Curve to Extend.

40 STEP 19: Select the other side of the previously offset curve as the Curve to Extend.

41 STEP 20: Pull out the Extend toolbar flyout so that we can select the Connect command to trim the edges of the line that extend past the previously offset curve.

42 STEP 21: Make sure that Join=Yes so that when the curves are connected, the line is Joined at the same time. This helps eliminate performing the Join command later on. STEP 22: Select the first curve to join, and then the other. Do this for both sides.

43 STEP 24: Before ending the extrude curve command, be sure that BothSides=Yes and Cap=Yes. This will ensure that the newly created extruded object is a solid and extends beyond the existing solid on each side. This is critical for performing future operations. STEP 23: With the previously joined curve highlighted, select the Extrude Curve command. Extrude the curve so that it extends beyond the solid.

44

45 STEP 27: Select the object that you wish to subtract as the Select second set of surfaces or polysurfaces and press ENTER. STEP 26: Select the object that you wish to keep for the Select first set of surfaces or polysurfaces and press ENTER. STEP 25: Select the Boolean Difference command.

46 The result is a new solid that we can further manipulate to create a repetitive structural system. See the next slides.

47 STEP 03: Select the previously created object to contour. STEP 01: Create a new layer and make it active by double-left clicking on the new layer. STEP 02: Select the Contour command.

48 STEP 04: Select a base point for the contour. This point can be anywhere in the model space. In this instance, I have snapped to the end point of the surface in plan view. STEP 05: Select another point in space for the direction of the contour. In this case I want the contours to be generated to the left; therefore, I have selected a point to the left of the previously selected base point.

49 STEP 06: Enter a distance in the command line to indicate how far apart the contours will occur. Contours through an object is the same as cutting sections at a specified interval. The next slides will show a step-by-step result of the command.

50

51

52

53

54

55 Often while 3D modeling, we use stereotomic objects as construction objects allowing us to extract more detailed forms and components from. Now that we have contoured the solid, we can work with the new details and can turn off the construction object. STEP 01: Turn off the layer that contains the solid form so that we can reveal the newly created contours.

56 In order to work with the contours and make them into solids, we need all the curves to be joined. Sometimes, the operation leaves open ended components; therefore, we need to do some touch up work.

57 STEP 02: Draw lines to snap to the end points of the open components.

58 STEP 04: Select the Join command. STEP 03: Select all of the previously created contours.

59 Notice that Rhino assumes an extrusion direction for you by default and often times, this is not the direction that you plan on extruding. STEP 05: With the previously joined curves still selected, select the Extrude Curve command. STEP 06: In the paranthesis, leftclick over the work Direction

60 STEP 07: Select a base point for the direction. This can be anywhere in the model space. STEP 08: Make sure that your Ortho is active.

61 STEP 09: Select the second point for the extrusion direction. In this case, I want the extrusion to occur along the x-axis; therefore, I am selecting a point to the upper left from the base point (look at the world icon in the lower left corner for reference).

62 STEP 10: Make sure BothSides=Yes, Cap=Yes, and then input 1

63 The result is a tectonic structural system. You can see that stereotomic modeling is the act of starting with 3D solid objects and then carving away at them as if they were a piece of clay. Eventually, you carve and manipulate the 3D solid form to reveal a tectonic system. Future tutorials will cover examples of tectonic modeling methods. The next slides show you that since you kept the solid construction object on a separate layer, we can use it to create the structural system in the other direction following similar contour and extrusion methods.

64

65

66