<function name="CHSpline" parent="math" type="libraryfunc"> <description>Cubic Hermite spline algorithm.</description> <realm>Shared and Menu</realm> <file line="166-L179">lua/includes/extensions/math.lua</file> <added>2023.08.08</added>⤶ <args> <arg name="frac" type="number">From 0 to 1, where alongside the spline the point will be.</arg> <arg name="point0" type="Vector">First point for the spline.</arg> <arg name="tan0" type="Vector">Tangent for the first point for the spline.</arg> <arg name="point1" type="Vector">Second point for the spline.</arg> <arg name="tan1" type="Vector">Tangent for the second point for the spline.</arg> </args> <rets> <ret name="" type="Vector">Point on the cubic Hermite spline, at given fraction.</ret> </rets> </function> <example> <code> local points = { Vector( 128, 128 ), -- point 1 Vector( 384, 128 ), -- tangent pos 1 Vector( 128, 384 ), -- point 2 Vector( 384, 384 ) -- tangent pos 2 } hook.Add( "HUDPaint", "math.BezierLerp", function() local frac = RealTime() % 1 local point = math.CHSpline( frac, unpack( points ) ) surface.SetDrawColor( 255, 255, 0 ) surface.DrawRect( point.x - 4, point.y - 4, 8, 8 ) surface.DrawRect( points[1].x - 4, points[1].y - 4, 8, 8 ) surface.DrawRect( points[3].x - 4, points[3].y - 4, 8, 8 ) surface.SetDrawColor( 255, 0, 0 ) surface.DrawRect( points[2].x - 4, points[2].y - 4, 8, 8 ) surface.DrawRect( points[4].x - 4, points[4].y - 4, 8, 8 ) -- Draw the spline for i=0,20 do local point = math.CHSpline( i / 20, unpack( points ) ) surface.SetDrawColor( 0, 255, 0 ) surface.DrawRect( point.x - 2, point.y - 2, 4, 4 ) end end ) </code> <output> <upload src="70c/8db983d5bad2ef0.png" size="28227" name="image.png" /> </output> </example>