Revision Difference
util.IsSphereIntersectingCone#551395
<function name="IsPointInCone" parent="util" type="libraryfunc">⤶
<description>Returns whether a point is within a cone or not.</description>⤶
<realm>Shared</realm>⤶
<added>2023.08.08</added>⤶
<args>⤶
<arg name="point" type="Vector">The position of the point to test.</arg>⤶
<arg name="coneOrigin" type="Vector">The position of the cone tip.</arg>⤶
<arg name="coneAxis" type="Vector">The direction of the cone.</arg>⤶
<arg name="coneSine" type="number">The sine of the cone's angle.</arg>⤶
<arg name="coneLength" type="number">Length of the cone's axis.</arg>⤶
</args>⤶
<rets>⤶
<ret name="" type="boolean">`true` if the point is within the cone, `false` otherwise.</ret>⤶
</rets>⤶
</function>⤶
⤶
<example>⤶
<code>⤶
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⤶
</code>⤶
</example>
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