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HT_Boolean | Check_Current_Geometry_Interesting (HT_Rendition *nr) |
HT_Boolean | Check_Geometry_Interesting (HT_Rendition *nr, HT_(Geometry)*geo) |
HT_Boolean | Check_Segment_Interesting (HT_Rendition *nr, HT_Segment_Info *si) |
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Checks the value of the "interesting" bit in the item currently being drawn.
DETAILSThe interesting bit is a place holder that can be used for application-specific purposes. The bit is referred to as the "interesting" bit because it can be set during rendering and then interrogated later.For example, during rendering, items that are off-screen are flagged un-interesting, since they are outside the camera's view. Only the items on the screen are marked as interesting. During selection processing, these off-screen items are immediately rejected for consideration. A callback on the rendering or selection traversal can override the default flagging on any kind of geometry. NOTESRESTRICTIONS |
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Checks the value of the "interesting" bit in a specified piece of geometry.
DETAILSThe interesting bit is a place holder that can be used for application-specific purposes. The bit is referred to as the "interesting" bit because it can be set during rendering and then interrogated later.For example, during rendering, items that are off-screen are flagged un-interesting, since they are outside the camera's view. Only the items on the screen are marked as interesting. During selection processing, these off-screen items are immediately rejected for consideration. A callback on the rendering or selection traversal can override the default flagging on any kind of geometry.
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Checks the value of the "interesting" bit in a specified segment.
DETAILSThe interesting bit is a place holder that can be used for application-specific purposes. The bit is referred to as the "interesting" bit because it can be set during rendering and then interrogated later.For example, during rendering, items that are off-screen are flagged un-interesting, since they are outside the camera's view. Only the items on the screen are marked as interesting. During selection processing, these off-screen items are immediately rejected for consideration. A callback on the rendering or selection traversal can override the default flagging on any kind of geometry.
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