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render.ComputeLighting

  Vector render.ComputeLighting( Vector position, Vector normal )
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Description

Calculates the light color at a certain position.

This includes both ambient light and dynamic light.

See render.ComputeDynamicLighting for dynamic light only.

See render.GetAmbientLightColor for map-wide ambient color.

Arguments

1 Vector position
The position to get the light at.
2 Vector normal
The direction of an imaginary surface to get the light at.

Pointing away from walls will get the lighting the wall receives. Pointing towards walls will not.

Returns

1 Vector
A vector representing the light at that point.

Example

Visualizes light level at the spot player is looking at.

hook.Add( "HUDPaint", "test_navmesh", function() local ply = LocalPlayer() local tr = ply:GetEyeTrace() local startPos = tr.HitPos local color = render.ComputeLighting( startPos, tr.HitNormal ) local colorDyn = render.ComputeDynamicLighting( startPos, tr.HitNormal ) local colorAmbi = color - colorDyn local pos2D = startPos:ToScreen() pos2D.x = pos2D.x + 30 draw.RoundedBox( 4, pos2D.x - 25, pos2D.y - 5, 250, 60, Color(0,0,0, 200 ) ) draw.SimpleText( "Color: " .. tostring(color), "Default", pos2D.x, pos2D.y, color_white ) draw.SimpleText( "Dynamic Color: " .. tostring(colorDyn), "Default", pos2D.x, pos2D.y + 20, color_white ) draw.SimpleText( "Ambient Color: " .. tostring(colorAmbi), "Default", pos2D.x, pos2D.y + 40, color_white ) draw.RoundedBox( 4, pos2D.x - 20, pos2D.y, 10, 10, Color( color.x * 255, color.y * 255, color.z * 255 ) ) draw.RoundedBox( 4, pos2D.x - 20, pos2D.y + 20, 10, 10, Color( colorDyn.x * 255, colorDyn.y * 255, colorDyn.z * 255 ) ) draw.RoundedBox( 4, pos2D.x - 20, pos2D.y + 40, 10, 10, Color( colorAmbi.x * 255, colorAmbi.y * 255, colorAmbi.z * 255 ) ) end )
Output:
July01-2855-gmod_win64.gif

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