<function name="BSplinePoint" parent="math" type="libraryfunc"> <description>Basic code for algorithm.</description> <description>Basic code for Bezier-Spline algorithm.</description> <realm>Shared and Menu</realm> <file line="144-L160">lua/includes/extensions/math.lua</file> <args> <arg name="tDiff" type="number">From 0 to 1, where alongside the spline the point will be.</arg> <arg name="tPoints" type="table">A table of <page>Vector</page>s. The amount cannot be less than 4.</arg> <arg name="tMax" type="number">Just leave this at 1.</arg> </args> <rets> <ret name="" type="Vector">Point on Bezier curve, related to tDiff.</ret> </rets> </function> <example> <description>Example usage of the function, makes a black box moving along the beizer curve made out of 4 points.</description> <code> local points = { Vector( 100, 100, 0 ), Vector( 200, 200, 0 ), Vector( 300, 100, 0 ), Vector( 400, 200, 0 ) } hook.Add( "HUDPaint", "BSplinePointExample", function() -- Draw the points for _, p in ipairs( points ) do draw.RoundedBox( 0, p.x - 2, p.y - 2, 4, 4, color_white ) end -- Draw the spline surface.SetDrawColor( 255, 0, 0, 255 )⤶ local lastPos = math.BSplinePoint( 0, points, 1 )⤶ for i=0, 10 do⤶ local pos = math.BSplinePoint( i / 10, points, 1 )⤶ surface.DrawLine( lastPos.x, lastPos.y, pos.x, pos.y )⤶ lastPos = pos⤶ end⤶ ⤶ -- Draw a point on the spline⤶ local pos = math.BSplinePoint( ( math.cos( CurTime() ) + 1 ) / 2, points, 1 ) draw.RoundedBox( 0, pos.x - 2, pos.y - 2, 4, 4, color_black ) end ) ⤶ end ) </code> </example>