61 Wiretrame computer grephie Wiretrame models have surfaces and are hollow on t

Question

61 Wiretrame computer grephie Wiretrame models have surfaces and are hollow on the inside. models are not made up of vertices and ed 63, wireframe models can only be displayed in tr 64. The inside of wireframe models is not empy. nd hidden view modes but ,dabl- 6s. Surface models are wireframe models with faces which are formed by the inmersection of Surface models are wireframe models with a membrane, or tave or more edg 66. 67. Surface and solid models cannot be displayed in shaded mode. paper, or skin wrapped all roundi 68. The inside of a surface model is not empty 69. Solid models are surface models with some material on the inside of the objects 70. Solid models do not have precise matbematical descriptions of the objects. 71. Solid models cannot be associated with materials, texture or surface properties and vohume 72. Solid models are used for design visualization and detail engineering analysis 73. The steps in solid modeling are: create a shape; convert shape into profile, transfiorm 74. A shape is not a closed 2D figure without specified size and or constraint. 75. A shape cannot have two or more separate graphic elements joined together 76. A profile is a shape with fixed size and geometry. 77. A profile is not an accurate graphic representation of a fixed shape. 78. A profile must be a single entity object. 79. A profile is not a representation of specific design intent. proile into solid. 80. A profile may be partially or fully constrained 81. A new design is not created by changing any of the constraints of a profile. 82. In AutoCA D, the two common commands used to convert a shape into a profile are join and region. 83. In part modeling, a component cannot be decomposed into separate segnents or features 84. Graphic 85. Sketching ou 86. Outline views are created on the top, front, or right reference planes 87. Outline views showing objects such as boxes, cylinders, cones, etc. are basic forms. line views of segments or features does not aid shape and profile construction. solid modeling. the best shape descriptions should be chosen for shape construction in plane. effort, be careful to create a shape or profle on the correct reference 89. In AutoCAD, polyline 90. Profiles can be transformed into solids by extrusion or revolution. ellipse, rectangle, and region cannot be used to create profiles. 91. A cross-sectional profile is not needed for extrusion

Explanation / Answer

61. TRUE

THESE ARE MADE UP OF i)EXPLICT VERTEX LIST

ii) polygon listing

iii)explicit edge listing

62. FALSE

A wireframe model is a skeletal description of a 3D object. There are no surfaces in a wireframe model; it consists only of points, lines, and curves that describe the edges of the object. You can create wireframe models by positioning 2D (planar) objects anywhere in 3D space.A wireframe model is a skeletal description of a 3D object. There are no surfaces in a wireframe model; it consists only of points, lines, and curves that describe the edges of the object. You can create wireframe models by positioning 2D (planar) objects anywhere in 3D space.

63. FALSE

The Wireframe style displays the image of the model with all edges and lines drawn, but with no surfaces drawn.When a view displays the wireframe visual style, you can apply materials to selected element types. Those materials do not display in the wireframe view; however, surface patterns still display. Also, you cannot place material keynotes in a wireframe view

64. FALSE

A wireframe model is a skeletal description of a 3D object SO INSIDE OF THE WIRE FRAME IS EMPTY

65. FALSE

Surface modeling is more sophisticated than wireframe modeling in that it defines not only the edges of a 3D object, but also its surfaces. The surface modeler defines faceted surfaces using a polygonal mesh. Because the faces of the mesh are planar, the mesh can only approximate curved surfaces.To differentiate these two types of surfaces, faceted surfaces are called meshes.

66. TRUE.

Surface models are a type of three-dimensional (3D) models with no thickness.Surface models should not be confused with thick models, that is, models having mass properties. Surface models do not have thickness whereas thick or solid models have a user-defined thickness

67. FALSE.

68.FALSE

69. FALSE

Solid modeling is the easiest type of 3D modeling to use. With the solid modeler, you can make 3D objects by creating basic 3D shapes: boxes, cones, cylinders, spheres, wedges, and tori (donuts). You can then combine these shapes to create more complex solids by joining or subtracting them or finding their intersecting (overlapping) volume. You can also create solids by sweeping a 2D object along a path or revolving it about an axis.

70. false.

Solid modeling is a consistent set of principles for mathematical and computer modeling of three-dimensional solids. Solid modeling is distinguished from related areas of geometric modeling and computer graphics by its emphasis on physical fidelity.[1] Together, the principles of geometric and solid modeling form the foundation of 3D-computer-aided design and in general support the creation, exchange, visualization, animation, interrogation, and annotation of digital models of physical objects.

71.false

72.true

73. True

74. true

75.false

76.true

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