Jacques Lucke
2c2178549b
This changes how we access the points that correspond to each curve in a `CurvesGeometry`. Previously, `CurvesGeometry::points_for_curve(int curve_index) -> IndexRange` was called for every curve in many loops. Now one has to call `CurvesGeometry::points_by_curve() -> OffsetIndices` before the loop and use the returned value inside the loop. While this is a little bit more verbose in general, it has some benefits: * Better standardization of how "offset indices" are used. The new data structure can be used independent of curves. * Allows for better data oriented design. Generally, we want to retrieve all the arrays we need for a loop first and then do the processing. Accessing the old `CurvesGeometry::points_for_curve(...)` did not follow that design because it hid the underlying offset array. * Makes it easier to pass the offsets to a function without having to pass the entire `CurvesGeometry`. * Can improve performance in theory due to one less memory access because `this` does not have to be dereferenced every time. This likely doesn't have a noticable impact in practice. Differential Revision: https://developer.blender.org/D17025