# ents/FindInCone

(Difference between revisions)

ents.FindInCone( )

# Description

2D visualization of the actual shape of the cone, click to enlarge

Finds and returns all entities within the specified cone. Only entities whose Entity:WorldSpaceCenter is within the cone are considered to be in it.

The "cone" is actually a conical "slice" of an axis-aligned box (see: ents.FindInBox). The image to the right shows approximately how this function would look in 2D. Due to this, the entity may be farther than the specified range!

 NOTE Clientside entities will not be returned by this function.
 WARNING If there are more than 512 entities in the axis-aligned box around the origin, then the result may be incomplete!

# Arguments

Vector origin

The tip of the cone.

# Arguments

Vector normal

Direction of the cone.

# Arguments

number range

The range of the cone/box around the origin.

# Arguments

number angle_cos

The cosine of the angle between the center of the cone to its edges, which is half the overall angle of the cone.

1 makes a 0° cone, 0.707 makes approximately 90°, 0 makes 180°, and so on.

# Returns

A table of all found Entitys.

# Examples

## Example

An example usage of this function. This example shows which entities are being returned by the function with red lines and the range with white transparent box.

```local mat = Material( "models/shiny" )
mat:SetFloat( "\$alpha", 0.5 )

local size = 200
local dir = LocalPlayer():GetAimVector()
local angle = math.cos( math.rad( 15 ) ) -- 15 degrees
local startPos = LocalPlayer():EyePos()

local entities = ents.FindInCone( startPos, dir, size, angle )

-- draw the outer box
local mins = Vector( -size, -size, -size )
local maxs = Vector( size, size, size )

render.SetMaterial( mat )
render.DrawWireframeBox( startPos, Angle( 0, 0, 0 ), mins, maxs, color_white, true )
render.DrawBox( startPos, Angle( 0, 0, 0 ), -mins, -maxs, color_white )

-- draw the lines
for id, ent in pairs( entities ) do
render.DrawLine( ent:WorldSpaceCenter() - dir * ( ent:WorldSpaceCenter()-startPos ):Length(), ent:WorldSpaceCenter(), Color( 255, 0, 0 ) )
end
end )```