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util.IsSphereIntersectingCone

  boolean util.IsSphereIntersectingCone( Vector sphereCenter, number sphereRadius, Vector coneOrigin, Vector coneAxis, number coneSine, number coneCosine )
2023.08.08 Search Github

Description

Returns whether a sphere is intersecting a cone or not.

Arguments

1 Vector sphereCenter
The center position of the sphere to test.
2 number sphereRadius
The radius of the sphere to test.
3 Vector coneOrigin
The position of the cone tip.
4 Vector coneAxis
The direction of the cone.
5 number coneSine
The math.sin of the cone's angle.
6 number coneCosine
The math.cos of the cone's angle.

Returns

1 boolean
true if the sphere intersects the cone, false otherwise.

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

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