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Use cosine of max slope angle for walkable slope checks in movement solver.

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This commit is contained in:
logzero 2016-12-06 22:46:09 +01:00
parent 561e0cbbf9
commit 25a0219e4d
1 changed files with 9 additions and 8 deletions
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17
apps/openmw/mwphysics/physicssystem.cpp
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@ -63,10 +63,11 @@ namespace MWPhysics
class MovementSolver
{
private:
static float getSlope(osg::Vec3f normal)
template <class Vec3>
static bool isWalkableSlope(const Vec3 &normal)
{
normal.normalize();
return osg::RadiansToDegrees(std::acos(normal * osg::Vec3f(0.f, 0.f, 1.f)));
static const float sMaxSlopeCos = std::cos(osg::DegreesToRadians(sMaxSlope));
return (normal.z() > sMaxSlopeCos);
}
enum StepMoveResult
@ -163,7 +164,7 @@ namespace MWPhysics
* ==============================================
*/
stepper.doTrace(colobj, tracer.mEndPos, tracer.mEndPos-osg::Vec3f(0.0f,0.0f,sStepSizeDown), collisionWorld);
if (getSlope(stepper.mPlaneNormal) > sMaxSlope)
if (!isWalkableSlope(stepper.mPlaneNormal))
return Result_MaxSlope;
if(stepper.mFraction < 1.0f)
{
@ -230,13 +231,13 @@ namespace MWPhysics
if (resultCallback1.hasHit() &&
( (toOsg(resultCallback1.m_hitPointWorld) - tracer.mEndPos).length2() > 35*35
|| getSlope(tracer.mPlaneNormal) > sMaxSlope))
|| !isWalkableSlope(tracer.mPlaneNormal)))
{
actor->setOnGround(getSlope(toOsg(resultCallback1.m_hitNormalWorld)) <= sMaxSlope);
actor->setOnGround(isWalkableSlope(resultCallback1.m_hitNormalWorld));
return toOsg(resultCallback1.m_hitPointWorld) + osg::Vec3f(0.f, 0.f, 1.f);
}
actor->setOnGround(getSlope(tracer.mPlaneNormal) <= sMaxSlope);
actor->setOnGround(isWalkableSlope(tracer.mPlaneNormal));
return tracer.mEndPos;
}
@ -413,7 +414,7 @@ namespace MWPhysics
osg::Vec3f to = newPosition - (physicActor->getOnGround() ?
osg::Vec3f(0,0,sStepSizeDown+2.f) : osg::Vec3f(0,0,2.f));
tracer.doTrace(colobj, from, to, collisionWorld);
if(tracer.mFraction < 1.0f && getSlope(tracer.mPlaneNormal) <= sMaxSlope
if(tracer.mFraction < 1.0f && isWalkableSlope(tracer.mPlaneNormal)
&& tracer.mHitObject->getBroadphaseHandle()->m_collisionFilterGroup != CollisionType_Actor)
{
const btCollisionObject* standingOn = tracer.mHitObject;