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Fix stepping and vertical force accumulation

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This commit is contained in:
Chris Robinson 2013-02-20 07:51:36 -08:00
parent b14def7c09
commit 4eb8ea0c95
1 changed files with 12 additions and 8 deletions
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20
apps/openmw/mwworld/physicssystem.cpp
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@ -39,14 +39,18 @@ namespace MWWorld
{
traceResults trace; // no initialization needed
newtrace(&trace, position+Ogre::Vector3(0.0f,0.0f,sStepSize),
position+Ogre::Vector3(0.0f,0.0f,sStepSize)+velocity*remainingTime,
halfExtents, isInterior, engine);
newtrace(&trace, position, position+Ogre::Vector3(0.0f,0.0f,sStepSize),
halfExtents, isInterior, engine);
if(trace.fraction == 0.0f)
return false;
newtrace(&trace, trace.endpos, trace.endpos + velocity*remainingTime,
halfExtents, isInterior, engine);
if(trace.fraction == 0.0f || (trace.fraction != 1.0f && getSlope(trace.planenormal) > sMaxSlope))
return false;
newtrace(&trace, trace.endpos, trace.endpos-Ogre::Vector3(0.0f,0.0f,sStepSize), halfExtents, isInterior, engine);
if(getSlope(trace.planenormal) < sMaxSlope)
if(getSlope(trace.planenormal) <= sMaxSlope)
{
// only step down onto semi-horizontal surfaces. don't step down onto the side of a house or a wall.
position = trace.endpos;
@ -56,7 +60,7 @@ namespace MWWorld
return false;
}
static void clipVelocity(Ogre::Vector3& inout, const Ogre::Vector3& normal, float overbounce)
static void clipVelocity(Ogre::Vector3& inout, const Ogre::Vector3& normal, float overbounce=1.0f)
{
//Math stuff. Basically just project the velocity vector onto the plane represented by the normal.
//More specifically, it projects velocity onto the normal, takes that result, multiplies it by overbounce and then subtracts it from velocity.
@ -134,7 +138,7 @@ namespace MWWorld
{
// if we're on the ground, force velocity to track it
clippedVelocity.z = velocity.z = std::max(0.0f, velocity.z);
clipVelocity(clippedVelocity, trace.planenormal, 1.0f);
clipVelocity(clippedVelocity, trace.planenormal);
}
const Ogre::Vector3 up(0.0f, 0.0f, 1.0f);
@ -153,7 +157,7 @@ namespace MWWorld
if(getSlope(trace.planenormal) <= sMaxSlope)
{
// We hit a slope we can walk on. Update velocity accordingly.
clipVelocity(clippedVelocity, trace.planenormal, 1.0f);
clipVelocity(clippedVelocity, trace.planenormal);
// We're only on the ground if gravity is affecting us
onground = gravity;
}
@ -186,7 +190,7 @@ namespace MWWorld
onground = false;
}
physicActor->setOnGround(onground);
physicActor->setVerticalForce(clippedVelocity.z - time*400.0f);
physicActor->setVerticalForce(clippedVelocity.z - time*627.2f);
return newPosition;
}