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util.IntersectRayWithSphere#551392

<function name="IntersectRayWithSphere" parent="util" type="libraryfunc">⤶ <description>Performs a ray-sphere intersection and returns the intersection positions or nil.</description>⤶ <realm>Shared</realm>⤶ <added>2023.08.08</added>⤶ <args>⤶ <arg name="rayOrigin" type="Vector">Origin/start position of the ray.</arg>⤶ <arg name="rayDelta" type="Vector">The end position of the ray relative to the start position. Equivalent of `direction * distance`.</arg>⤶ <arg name="shperePosition" type="Vector">Any position of the sphere.</arg>⤶ <arg name="sphereRadius" type="number">The radius of the sphere.</arg>⤶ </args>⤶ <rets>⤶ <ret name="" type="number">The first intersection position along the ray, or `nil` if there is no intersection.</ret>⤶ <ret name="" type="number">The second intersection position along the ray, or `nil` if there is no intersection.</ret>⤶ </rets>⤶ </function>⤶ ⤶ <example>⤶ ⤶ <code>⤶ -- Store entity we look at⤶ local ent = NULL⤶ ⤶ -- Do this every frame⤶ hook.Add( "Think", "Think_IntersectRayWithOBBExample", function()⤶ ⤶ -- Store player object⤶ local ply = LocalPlayer()⤶ ⤶ -- If player looked at some valid entity, swtich our entity to that⤶ local trEnt = ply:GetEyeTrace().Entity⤶ if ( IsValid( trEnt ) ) then ent = trEnt end⤶ ⤶ -- No entity? do nothing⤶ if ( !IsValid( ent ) ) then return end⤶ ⤶ local start = ply:GetShootPos()⤶ local delta = ply:GetAimVector() * 500⤶ local endpos = start + delta⤶ ⤶ -- Perform a ray intersection against a sphere from the player's eyes⤶ local frac1, frac2 = util.IntersectRayWithSphere( start, delta, ent:GetPos() + ent:OBBCenter(), ent:OBBMaxs():Length() )⤶ --print( "res: ", frac1, frac2 ) -- For debugging⤶ ⤶ -- Display intersection points⤶ if ( frac1 ) then⤶ local intersect1 = LerpVector( frac1, start, endpos )⤶ local intersect2 = LerpVector( frac2, start, endpos )⤶ debugoverlay.Axis( intersect1, angle_zero, 10, 0.01 )⤶ debugoverlay.Axis( intersect2, angle_zero, 10, 0.01 )⤶ end⤶ ⤶ -- Draw the OBB visualization, requires developer 1 in console.⤶ debugoverlay.Sphere( ent:GetPos() + ent:OBBCenter(), ent:OBBMaxs():Length(), 0.01, frac1 != nil and Color( 0, 255, 0 ) or Color( 255, 0, 0 ) )⤶ ⤶ end )⤶ </code>⤶ </example>⤶ ⤶

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