Keys to Interactive Content Design
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Know what's possible using the elements VRML 2.0 provides
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Reuse and Share components to build a common user experience
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Be efficient in your designs
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Provide affordances to make your interface obvious and intuitive.
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Take into account framerate and likely screen resolution in your simulation:
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A range of target framerates greatly affect navigation and simulation calculations
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Know how to use Sensors and scripts: implications for scene structure