modeling with extended primitives
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Modeling with Extended Primitives. James Martin High School Animation Instructor: G. Patton. From: CHAPTER 3 – 3DS MAX AND ITS APPLICATIONS. 1. What are extended primitives?. - PowerPoint PPT PresentationTRANSCRIPT
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Modeling withExtended Primitives
James Martin High SchoolAnimation
Instructor: G. Patton
From: CHAPTER 3 – 3DS MAX AND ITS APPLICATIONS
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1. What are extended primitives?
Extended primitives are predefined geometric objects used in creating models that have slightly more refined parameters than standard primitives. The extended primitives are:
EXTENDED PRIMITIVES
Capsule Hedra Quad Patch
C-Ext Hose Ring Wave
Chamfer Box L-Ext Spindle
Chamfer Cylinder Oil Tank Torus Knot
Gengon Prism Tri Patch
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2. What are patch grids?
Patch grids are flat, rectangular 2D objects made up of multiple triangular or rectangular faces.
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3. What are the two types of patch grids?
Quad patch and Tri patch
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4. How do the two types of patch grids differ from each other?
The number of segmented faces in a quad patch can be increased from the minimum 36 faces, but a tri patch is limited to 72 triangular faces.
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5. What is the purpose of the P: and Q: spinners in the Family Parameters: area of the Parameters rollout when drawing a hedra?
Values entered in the P: and Q: spinners modify the vertices and faces of the hedra. The values are related and cannot exceed 1.0 when added together.
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6. How many different shapes of facets can a hedra have?
A Hedra can have three different shapes of facets
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7. What additional parameter does a chamfer box have over a box?
Chamfers have a fillet radius.
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8. What does the value in the Height Segs: spinner determine when drawing a chamfer cylinder?
• It determines the number of divisions on the height of the cylinder..
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9. What is a capsule?
A capsule is a cylinder with two rounded end caps that are hemispheres having the same diameter as the cylinder..
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10. How does an oil tank differ from a capsule?
• In an oil tank, the height parameters of the hemispherical end caps can be changed.
• An oil tank also has a blend parameter that can be set to create a bevel between the cylinder and each end cap, providing a smooth transition between faces.
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11. How does a spindle differ from an oil tank?
The end caps of a spindle are cones, the end caps of a prism are hemispheres.
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12.What is a prism?
A prism is an object having five faces, including two parallel triangular ends and three sides.
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13. How does a gengon differ from a prism?
The base of a gengon is a regular polygon. rather than a triangle, and the number of sides can be set and filleted. Whereas the sides of a prism cannot.
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14. What is a typical use for L-Ext and C-Est objects?
• An L-Ext has a L-shaped base and can be used to quickly create walls, fences, and other L-shaped objects.
• A C-Ext has a C-shaped base and can be used to create similar objects.
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15. How does a torus knot differ from a standard torus?
• A torus knot is a complex object that has a knotted form and more parameters than a standard torus.
• A torus knot uses a 3D curve as its path, rather than a 2D curve.
• The base curve of a torus knot can be a circle or knot.
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16. What does the Warp Count: value determine when drawing a torus knot?
The Warp Count: value determines how many “bumps” there are around the circumference of the circle in a circular torus.
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17. What does the Warp Height: value determine when drawing a torus knot?
The Warp Height: value determines how “big” the bumps are around the circumference of the circle in a circular torus.
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18. What is a common use for a ring wave?
A ring wave can be used for many different special effects, such as an outer space explosion, because its irregularity can be animated.
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19. What is the Ring Wave Timing area of the Parameters rollout used for?
The Ring Wave Timing area is used to animate the growth, or explosion, of the ring wave.
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20. What are the three basic shapes for a hose?
A hose can be:
- Circular
- Rectangular
- D-shaped.