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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "MoveMath.h"
#include "Sim/MoveTypes/MoveDefHandler.h"
/*
Calculate speed-multiplier for given height and slope data.
*/
float CMoveMath::HoverSpeedMod(const MoveDef& moveDef, float height, float slope)
{
// no speed-penalty if on water (unless noWaterMove)
if (height < 0.0f)
return (1.0f * !noHoverWaterMove);
// slope too steep?
if (slope > moveDef.maxSlope)
return 0.0f;
return (1.0f / (1.0f + slope * moveDef.slopeMod));
}
float CMoveMath::HoverSpeedMod(const MoveDef& moveDef, float height, float slope, float dirSlopeMod)
{
// no speed-penalty if on water
if (height < 0.0f)
return 1.0f;
if (slope > (moveDef.maxSlope * 2.0f))
return 0.0f;
// too steep downhill slope?
if (dirSlopeMod <= 0.0f && (slope * dirSlopeMod) < (-moveDef.maxSlope * 2.0f))
return 0.0f;
// too steep uphill slope?
if (dirSlopeMod > 0.0f && (slope * dirSlopeMod) > ( moveDef.maxSlope ))
return 0.0f;
return (1.0f / (1.0f + std::max(0.0f, slope * dirSlopeMod) * moveDef.slopeMod));
}
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