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math.CHSpline#551401

<function name="CHSpline" parent="math" type="libraryfunc">⤶ <description>Cubic Hermite spline algorithm.</description>⤶ <realm>Shared and Menu</realm>⤶ <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>

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