Cross-hatching orientation: the cross-hatch direction when present. Orientation: the stroke direction in image space. 
Hatching level: whether a region contains no hatching, single hatching, or cross-hatching. From the drawing they pulled out the following information: The group had artists hand shade 3D models of different objects and taught the computer to analyse what the artists had done. This can be useful for both replication and restoration of historic works as well as new applications such as animated cartoons. The computer can study the line styles on a drawing and apply it to a new 3D model creating a hand drawn look similar to the artists original creation. Simon Breslav from the Environments and Ergonomics team likes to draw and did some work with his colleagues at the University of Toronto on teaching the computer how to draw. You can read more about this research and follow our instructions if you want to try it out. Demonstrating How an Interaction Technique Works. When publishing an academic paper or instructional document, beyond showing an animation, here are some of the best places to use an animated figure: In a work of entertainment, like a comic book, publishers may be more free with including animations. Audio: sound can be included but can be very distracting so use only if necessary. Number of Animated Figures: use them sparingly but where important to communicate. File Size: keeping the animations short will reduce file size. 
Duration: just like with a static figure, keep the animated figure short and concise.Of course there are other things to consider when creating animated figures: readers should not be distracted by the animation when reading text.readers should not be burdened with complex UI controls.With modern computing powers we can move from static pictures in our PDF documents to dynamic animations and tell a more compelling and understandable story like in this Project Draco example (you may need to download it to see the animation in action and use Adobe Reader X or newer).Īs we can see in the video above, there are things to consider when authoring a document with animated figures:
We've had books with pictures in them for hundreds of years.
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