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Roundline precision #556

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johguenther
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  • addressing Curve (cylinder) rendering bug ospray#600
  • higher precision for far away curve
  • still issues with long and thin curves with secondary rays (shadow acne due to self intersection), may need to internally subdivide the curve into small segments and re-intersect segment based on initial u (but only for RTC_SCENE_FLAG_ROBUST mode).
  • TODO coneline

@johguenther
Simpler and more robust roundline intersection
71fca72 
Directly solve for a linear swept sphere, avoiding the CSG between cone
and end spheres.
@johguenther
in ray space (more precise)
c5133cf
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