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43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef ROPE_HELPERS_H
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#define ROPE_HELPERS_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "mathlib/vector.h"
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//
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// This function can help you choose starting conditions for your rope. It is fairly
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// expensive (slightly less than 0.5ms for a 10-node rope), but it's within reason for the
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// frequency we create ropes at.
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//
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// Input:
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// - rope endpoints
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// - the number of nodes the client will be simulating (CRopeKeyframe::m_nSegments)
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// - how low you want the rope to hang (below the lowest of the two endpoints)
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//
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// Output:
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// - pOutputLength = length of the rope
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// - pOutputSlack = slack you should set to produce the desired hang
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//
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void CalcRopeStartingConditions(
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const Vector &vStartPos,
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const Vector &vEndPos,
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int const nNodes,
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float const desiredHang,
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float *pOutputLength,
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float *pOutputSlack
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);
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#endif // ROPE_HELPERS_H
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