is there an simple statement to move an entity from one vec3 to another - in steps?

[holschuh]

Hi,

 

is there an simple Statement to move an entity from one vec3 to an other in steps ... means smoth not in one big jump. I think this is somethin in math but i am not good in Vector math...

 

Have you an snippet for me or an kick into the right direction <-wordplay

 

cu

Volker

[CreativeOcclusion]

If you are using a navmesh you can use GoToPoint...

 

http://www.leadwerks.com/werkspace/page/api-reference/_/entity/entitygotopoint-r700

[holschuh]

this is an idea but i need it for a realy simple movement along x and z axis on same y Level with no barrier

in the way.

[Naughty Alien]

..here is smoothing function you can use..it will calculate one variable of your choice, which can be either angle or position, etc..

 

float New_Value(float destination, float current, float numberOfSteps)

{

if(abs(destination-current)<0.01)

{

return destination;

}

else

{

return(current+((destination-current)/numberOfSteps));

}

}

 

..so, in your main loop, you will just feed function with required data:

 

-destination

That is where you want your object to go. It can be X, Y or Z coordinate. For each coordinate use function with appropriate values.

 

-current

This value representing current value of your object position. I dont know how you capturing that with LE3, but this is value of current position your object is at.

 

-numberOfSteps

This value is number of steps your motion will take before reach its destination.

 

So, if you wanna move your object to new position, for example X=10, Y=100, Z=-14, in 30 steps then your loop should look like this..

 

 

//Loop Start Here

 

float current_X=GetXPositionWithLE3Command(MyObject);

float current_Y=GetYPositionWithLE3Command(MyObject);

float current_Z=GetZPositionWithLE3Command(MyObject);

 

float new_X=New_Value(10.0, current_X, 30.0);

float new_Y=New_Value(100.0, current_Y, 30.0);

float new_Z=New_Value(-14.0, current_Z, 30.0);

 

PositionEntityCommandInLE3(MyObject, new_X, new_Y, new_Z);

 

......

//Loop End Here

...

 

..this will give you nice, smooth motion (or rotation, depend what you want to update)..I hope this helps..

[Josh]

I believe this will do it (may have typos):

function MoveToPoint(entity,target,speed)
   local currentpos = entity:GetPosition(true)
   local diff = target - currentpos
   if diff:Length() < speed then
       entity:SetPosition(target)
   else
       diff = diff:Normalize() * speed
       entity:Translate(diff.x,diff.y,diff.z,true)
   end
end

[Rick]

https://github.com/kikito/tween.lua

 

This is a lua tween library (I didn't make it). Honestly something like that built-in would be ideal. Would be nice to just be able to say move from here to here over x seconds using this kind of easing.

[shadmar]

LE already have have a simple interpolation function:

http://www.leadwerks.com/werkspace/page/api-reference/_/math/mathcurve-r602

[holschuh]

Hi,

 

Naughty Aliens code is the way i did it by myself but i hoped the engine save some work for me...

 

Josh's snippet did it for me was easy to include into my other stuff.

i have to learn some matrix and Vector math like the normalize length and translate ...

this can save many lines i break down at the moment to single integer math with many helper variables ...

 

thanks all for help

 

cu

Volker

[Naughty Alien]

..well..just put mentioned code in to some nice function you can call in one line any time you want and you are good to go..