Introduction to Renderman The Renderman Pipeline Hello World ...
Introduction to Renderman The Renderman Pipeline Hello World ...
Introduction to Renderman The Renderman Pipeline Hello World ...
- No tags were found...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Moving Things Around<br />
Transforms<br />
• In the first example the command Translate is<br />
used <strong>to</strong> move the object 2 in the Z.<br />
• <strong>Renderman</strong> treats +ve Z as going in<strong>to</strong> the<br />
screen (opposite <strong>to</strong> OpenGL)<br />
• <strong>Renderman</strong> (and ribs) work with a Fixed Camera<br />
and the world must be moved <strong>to</strong> be in the<br />
correct position for the fixed camera<br />
• This can be counter intuitive at first but you<br />
soon get used <strong>to</strong> it.<br />
# Example rib 2<br />
Display "Example2.tiff" "file" "rgb"<br />
Projection "perspective"<br />
<strong>World</strong>Begin<br />
Translate 0 0 2<br />
Translate -1 0 0<br />
Sphere 1 -1 1 360<br />
Translate 1 0 0<br />
Sphere 1 -1 1 360<br />
<strong>World</strong>End<br />
J. P. Macey 2006/7 5<br />
J. P. Macey 2006/7 6<br />
Grouping Transforms<br />
Other Affine Transforms<br />
• Scale x y z : scales the current active elements<br />
in x y and z<br />
• Rotate [angle] x y z : rotate around the axis by<br />
[angle] degrees<br />
• To group transforms we use the TransformBegin<br />
and TransformEnd commands<br />
• Identity : res<strong>to</strong>res the transformation matrix <strong>to</strong><br />
what is was before world begin<br />
• <strong>The</strong>se are similar <strong>to</strong> the OpenGL glPushMatrix()<br />
and glPopMatrix() and preserve the current<br />
transformation state<br />
Display "Example3.tiff" "file" "rgb"<br />
Projection "perspective"<br />
<strong>World</strong>Begin<br />
Translate 0 0 2<br />
TransformBegin<br />
Translate -1 0 0<br />
Sphere 1 -1 1 360<br />
TransformEnd<br />
TransformBegin<br />
Translate 1 0 0<br />
Sphere 1 -1 1 360<br />
TransformEnd<br />
<strong>World</strong>End<br />
J. P. Macey 2006/7 7<br />
J. P. Macey 2006/7 8
Change language