[Hunter-Digital]

Well, I have a line, each point has different XYZ and line total width may varray.

[A]----------------------[B]

And I want to generate points of predefined distance accros the line:

[A]-.-.-.-.-.-.-.-.-.-.-.-.-[B]

Having origins for each one of them.

It's more a math problem and I really suck at maths

[joaquimandrade]

Let's see if I can say it right:

Subtract B by A and you will get the vector that goes from A to B.
Normalize it so it becomes with length 1.
Than multiply it by the length between points (as you defined it)

PHP Code:

xs_vec_sub(b,a,c)
xs_vec_normalize(c,c)
xs_vec_mul_scalar(c,lengthBetweenPoints,c) 


Now C is a vector with the direction from A to B and with length as you defined between points.

So, now to get the point N from A you will do:

PHP Code:


new n = 3
new Float:nOrigin[3]

xs_vec_mul_scalar(c,n,nOrigin)
xs_vec_add(nOrigin,a,nOrigin) 


Edit: if you want all the points in between you just have to do in the last step:

PHP Code:


for(new i=0;i<=lastPoint;i++)
{
  // use "a" here

  xs_vec_add(a,c,a)
} 


[Hunter-Digital]

Hmm... thanks, I think I got the 'trick'.

PHP Code:

    new iOrigin[3]
    new Float:fA[3]
    new Float:fB[3]

    entity_get_vector(id, EV_VEC_origin, fA)
    get_user_origin(id, iOrigin, 3)
    IVecFVec(iOrigin, fB)

    new iNum = floatround(get_distance_f(fA, fB) / 50.0, floatround_floor)

    xs_vec_sub(fB, fA, fB)
    xs_vec_normalize(fB, fB)
    xs_vec_mul_scalar(fB, 50.0, fB)

    for(new i = 0 ; i < iNum; i++)
    {
        xs_vec_add(fA, fB, fA)

        /* sprite @ fA */
    } 


And by mistake I made a nice railgun effect

[IMG]http://img295.**************/img295/8889/dedust20057.th.jpg[/IMG]

It fades out really nicely, used TE_GLOWSPRITE and ledglow.spr