JJ206 Computer & Design 1 Chapter 08
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Transcript of JJ206 Computer & Design 1 Chapter 08
Ch 8: Hatching
AutoCAD 2012and
AutoCAD LT 2012 Essentials
By Scott Onstott
Ch 8: Hatching
Types of Hatch Objects• Hatch objects can be filled with solid color, tiling
line patterns, or gradients• Line patterns can optionally include a solid
background color, making them hybrid solid/line hatches
• Gradients can fade from one color to a set percentage of white (called tint) or you can create two-color gradients that fade from one specified color to another
• There are a variety of gradient “patterns” that fade linearly, cylindrically, or spherically
• Gradients can fade from the center or off to one side
Ch 8: Hatching
Island Detection Options• Islands are nested bounded areas• You have options on how to hatch nested
islands• Normal island detection alternates hatching
(hatch, no hatch, hatch, and so on) within each nested boundary
• Ignore island detection hatches all nested boundaries as one
• Outer island detection hatches only the outermost hatch boundary, leaving all other nested boundaries without hatching
Ch 8: Hatching
Associative Hatching• Associative is a toggle in the Hatch Creation tab of the ribbon that appears
when using the HATCH command• Associative hatches link the boundary object to the hatch itself so that the
extents of the hatch effect is controlled by the boundary object• Altering the shape of a boundary object automatically alters the extents of the
associated hatch effect
Ch 8: Hatching
Grayscale Colors• Colors 250-255 represent six
gradations of gray in Index color• You can choose any gray value when
using True Color• Index color is most often used in
AutoCAD because of its relative simplicity (255 colors plus ByLayer or ByBlock)
Ch 8: Hatching
Overriding Properties with Hatch• The HATCH and GRADIENT commands are unique in
their ability to override the following object properties: Color, Transparency, and perhaps most surprisingly: Layer
• Objects are usually assigned to the current layer but this is not necessarily the case with the HATCH and GRADIENT commands
• It doesn’t matter which layer is current when you issue the HATCH or GRADIENT commands
Ch 8: Hatching
Varying Transparency of Hatch Objects• By dragging the Transparency slider in the Properties
panel on the ribbon’s Hatch Creation tab, you have the ability to control the relative opacity/darkness of hatch objects
• Transparent overlapping hatch objects blend• You must toggle on the Show/Hide Transparency button
on the status bar to see transparent effects in the drawing canvas
Ch 8: Hatching
Creating Separate Hatches• Use the Create Separate Hatches toggle in the
expanded Options panel on the ribbon’s Hatch Creation tab to break multiple bounded areas into separate hatch objects
• Before creating separate hatches it is more efficient to style multiple bounded areas as a single hatch object. When you are satisfied with the pattern, scale, color, and so on, click Create Separate Hatches to break the multiple bounded areas into separate objects
• Each hatch object can be edited independently
Ch 8: Hatching
Manually Setting the Hatch Origin• Click the Set Origin point to manually
select a point that the pattern begins from• Setting the origin is especially helpful with
ceramic floor tiles, acoustical ceiling panels, and cross hatched mating parts
Ch 8: Hatching
Creating Gradient Hatches• Use the HATCH command and select a gradient in the Pattern
panel, or use the GRADIENT command• Gradients can fade from one color to white (i.e. blue to white), or
from one specified color to another (i.e. red to blue) • Click the button next to the Tint slider to toggle between 1-color and
2-color gradients• Adjust the Tint slider to adjust the amount of white mixed in 1-color
gradients