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Add steer parameter to CSceneNodeAnimatorFollowSpline which allows rotating node toward direction of movement.

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Thanks @ Bate for the patch (patch #175 with minor changes).

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6234 dfc29bdd-3216-0410-991c-e03cc46cb475
This commit is contained in:
cutealien
2021-08-20 16:39:37 +00:00
parent 54e10d0dbe
commit fab0c53b85
6 changed files with 29 additions and 12 deletions
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28
source/Irrlicht/CSceneNodeAnimatorFollowSpline.cpp
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@@ -13,15 +13,17 @@ namespace scene
//! constructor
CSceneNodeAnimatorFollowSpline::CSceneNodeAnimatorFollowSpline(u32 time,
const core::array<core::vector3df>& points, f32 speed,
f32 tightness, bool loop, bool pingpong)
f32 tightness, bool loop, bool pingpong, bool steer)
: ISceneNodeAnimatorFinishing(0), Points(points), Speed(speed), Tightness(tightness)
, Loop(loop), PingPong(pingpong)
, Loop(loop), PingPong(pingpong), Steer(steer)
{
#ifdef _DEBUG
setDebugName("CSceneNodeAnimatorFollowSpline");
#endif
StartTime = time;
//if (points.size() != 0)
// LastPos = points[0];
}
@@ -86,7 +88,17 @@ void CSceneNodeAnimatorFollowSpline::animateNode(ISceneNode* node, u32 timeMs)
const core::vector3df t2 = ( p3 - p1 ) * Tightness;
// interpolated point
node->setPosition(p1 * h1 + p2 * h2 + t1 * h3 + t2 * h4);
const core::vector3df lastPos(node->getPosition());
const core::vector3df pos(p1 * h1 + p2 * h2 + t1 * h3 + t2 * h4);
node->setPosition(pos);
// steering (rotate in direction of movement)
if (Steer && !pos.equals(lastPos)) // equality check fixes glitches due to very high frame rates
{
const core::vector3df toTarget(pos - lastPos);
const core::vector3df requiredRotation = toTarget.getHorizontalAngle();
node->setRotation(requiredRotation);
}
}
@@ -99,6 +111,7 @@ void CSceneNodeAnimatorFollowSpline::serializeAttributes(io::IAttributes* out, i
out->addFloat("Tightness", Tightness);
out->addBool("Loop", Loop);
out->addBool("PingPong", PingPong);
out->addBool("Steer", Steer);
u32 count = Points.size();
@@ -124,10 +137,11 @@ void CSceneNodeAnimatorFollowSpline::deserializeAttributes(io::IAttributes* in,
{
ISceneNodeAnimatorFinishing::deserializeAttributes(in, options);
Speed = in->getAttributeAsFloat("Speed");
Tightness = in->getAttributeAsFloat("Tightness");
Loop = in->getAttributeAsBool("Loop");
PingPong = in->getAttributeAsBool("PingPong");
Speed = in->getAttributeAsFloat("Speed", Speed);
Tightness = in->getAttributeAsFloat("Tightness", Tightness);
Loop = in->getAttributeAsBool("Loop", Loop);
PingPong = in->getAttributeAsBool("PingPong", PingPong);
Steer = in->getAttributeAsBool("Steer", Steer);
Points.clear();
for(u32 i=1; true; ++i)