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Roundline precision#556

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johguenther wants to merge 2 commits intodevelfrom
guj/roundline_precision
Draft

Roundline precision#556
johguenther wants to merge 2 commits intodevelfrom
guj/roundline_precision

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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

Directly solve for a linear swept sphere, avoiding the CSG between cone
and end spheres.
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