<cat>libraryfunc</cat> <function name="CubicBezier" parent="math" type="libraryfunc"> <description>Lerp point between 4 control points with cubic bezier. See <page>math.QuadraticBezier</page> for a similar function which works with 3 control points. </description> <realm>Shared and Menu</realm> <added>2023.08.08</added> <file line="260-L266">lua/includes/extensions/math.lua</file> <file line="220-L226">lua/includes/extensions/math.lua</file> <args> <arg name="frac" type="number">The fraction for finding the result. This number is clamped between 0 and 1.</arg> <arg name="p0" type="Vector">First control point</arg> <arg name="p1" type="Vector">First tangent</arg> <arg name="p2" type="Vector">Second tangent</arg> <arg name="p3" type="Vector">Second control point</arg> </args> <rets> <ret name="" type="Vector">Point between control points at the specified fraction</ret> </rets> </function> <example> <description>Demonstrates the use of this function.</description> <code> local points = { Vector( 128, 128 ), Vector( 384, 128 ), Vector( 384, 384 ), Vector( 128, 384 ) } hook.Add( "HUDPaint", "math.CubicBezier", function() local frac = RealTime() % 1 local point = math.CubicBezier( frac, points[1], points[2], points[3], points[4] ) 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[2].x - 4, points[2].y - 4, 8, 8 ) surface.DrawRect( points[3].x - 4, points[3].y - 4, 8, 8 ) surface.DrawRect( points[4].x - 4, points[4].y - 4, 8, 8 ) end ) </code> <output> <image src="ab571/8dc38952f5e0f29.gif" alt="Cubic bezier demonstration" /> </output> </example>