util.IsPointInCone
boolean util.IsPointInCone( Vector point, Vector coneOrigin, Vector coneAxis, number coneSine, number coneLength )
Description
Returns whether a point is within a cone or not.
Arguments
Returns
Example
function ENT:Draw()
local pos = self:GetPos()
local point = Vector( 0, 0, 0 )
local sphereRad = 20
local height = 100
local angle = 45 --[[degrees]] / 180 * math.pi -- converted to radians
local size = math.tan( angle )*height
local segs = 32
local is = util.IsPointInCone( point, pos, self:GetUp(), math.cos( angle ), height )
local is2 = util.IsSphereIntersectingCone( point, sphereRad, pos, self:GetUp(), math.sin( angle ), math.cos( angle ) ) -- infinite height
local precalc = 1/segs * math.pi * 2
local center = pos
for i = 1, segs do
local pos1 = pos + math.sin( i * precalc ) * size * self:GetForward() + math.cos( i * precalc ) * size * self:GetRight() + self:GetUp() * height
local pos2 = pos + math.sin( (i-1) * precalc ) * size * self:GetForward() + math.cos( (i-1) * precalc ) * size * self:GetRight() + self:GetUp() * height
render.DrawLine( pos2, pos1, is and Color( 0, 255, 0 ) or Color( 255, 0, 0 ) )
render.DrawLine( pos2, center, is and Color( 0, 255, 0 ) or Color( 255, 0, 0 ) )
end
render.DrawLine( pos, point, is and Color( 0, 255, 0 ) or Color( 255, 0, 0 ) )
debugoverlay.Sphere( point, sphereRad,0.01, is2 and Color( 0, 255, 0 ) or Color( 255, 0, 0 ) )
end