VISUAL REALITY AND VRML [Chapter 2 - BUILDING PRIMITIVE SHAPES]
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The document discusses the building blocks of VRML worlds called shapes. Shapes are constructed using Shape nodes which define the object's appearance and geometry. Common geometric shapes include boxes, cones, cylinders, spheres and text. The geometry of each shape is specified using corresponding nodes that define attributes like size, height, radius, or text string. Shapes are centered in the VRML world by default and a file can contain multiple overlapping shapes.
![Syntax: Text
• A Text geometry node builds text
• string - text to build
• fontStyle - font control
Shape {
appearance Appearance {
material Material { }
}
geometry Text {
string [ "Text","Shape" ]
fontStyle FontStyle {
style "BOLD"
}
}
}
PREPARED BY : NURAINI MOHD GHANI 10](https://image.slidesharecdn.com/chapter2buildingprimitiveshapes-120116064844-phpapp02/85/VISUAL-REALITY-AND-VRML-Chapter-2-BUILDING-PRIMITIVE-SHAPES-10-320.jpg)
VISUAL REALITY AND VRML [Chapter 2 - BUILDING PRIMITIVE SHAPES]
- 1. PREPARED BY : NURAINI MOHD GHANI 1
- 2. Shapes are the building blocks of a VRML world Primitive Shapes are standard building blocks: •Box •Cone •Cylinder •Sphere •Text PREPARED BY : NURAINI MOHD GHANI 2
- 3. Syntax: Shape A Shape node builds a shape appearance - color and texture geometry - form, or structure shape { appearance . . . geometry . . . } PREPARED BY : NURAINI MOHD GHANI 3
- 4. Specifying appearance Shape appearance is described by appearance nodes For now, we'll use nodes to create a shaded white appearance: Shape { appearance Appearance { material Material { } } geometry . . . } PREPARED BY : NURAINI MOHD GHANI 4
- 5. Specifying geometry: Shape geometry is built with geometry nodes: Box {...} Cone { . . . } Cylinder { . . . } Sphere { . . . } Text { . . . } • Geometry node fields control dimensions • Dimensions usually in meters, but can be anything PREPARED BY : NURAINI MOHD GHANI 5
- 6. Syntax: Box A Box geometry node builds a box size - width, height, depth Shape { appearance Appearance { material Material { } } geometry Box { size 2.0 2.0 2.0 } } PREPARED BY : NURAINI MOHD GHANI 6
- 7. Syntax: Cone • A Cone geometry node builds an upright cone • height and bottomRadius - cylinder size • bottom and side - parts on or off Shape { appearance Appearance { material Material { } } geometry Cone { height 2.0 bottomRadius 1.0 bottom TRUE side TRUE } } PREPARED BY : NURAINI MOHD GHANI 7
- 8. Syntax: Cylinder • A Cylinder geometry node builds an upright cylinder • height and radius - cylinder size • bottom, top, and side - parts on or off Shape { appearance Appearance { material Material { } } geometry Cylinder { height 2.0 radius 1.0 bottom TRUE top TRUE side TRUE } } PREPARED BY : NURAINI MOHD GHANI 8
- 9. Syntax: Sphere • A Sphere geometry node builds a sphere • radius - sphere radius Shape { appearance Appearance { material Material { } } geometry Sphere { radius 1.0 } } PREPARED BY : NURAINI MOHD GHANI 9
- 10. Syntax: Text • A Text geometry node builds text • string - text to build • fontStyle - font control Shape { appearance Appearance { material Material { } } geometry Text { string [ "Text","Shape" ] fontStyle FontStyle { style "BOLD" } } } PREPARED BY : NURAINI MOHD GHANI 10
- 11. #VRML V2.0 utf8 # A cylinder Shape { appearance Appearance { material Material { } } geometry Cylinder { height 2.0 radius 1.5 } } PREPARED BY : NURAINI MOHD GHANI 11
- 12. • Shapes are built centered in the world • A VRML file can contain multiple shapes • Shapes overlap when built at the same location PREPARED BY : NURAINI MOHD GHANI 12
- 13. Shapes are built using a Shape node Shape geometry is built using geometry nodes, such as Box, Cone, Cylinder, Sphere, and Text ·Text fonts are controlled using a FontStyle node PREPARED BY : NURAINI MOHD GHANI 13