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