trying to get the pitch or vertical angle

[Edgamer63]

Hello, i'm trying to get the pitch or vertical angle between two vectors. The thing is: What's going wrong?.

I've investigated, and the suposed formula to do it is:

void getAxisAngle(EntityPlayer a, EntityPlayer b, out double yaw, out double pitch){
    double deltaX = a.posX - b.posX;
    double deltaY = a.posY - b.posY;
    double deltaZ = a.posZ - b.posZ;
    yaw = atan2(deltaY,deltaX);
    pitch = asin(deltaZ / sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ * deltaZ));
}

Right, i understand it, and also coded into gml like this:

///pitch_from_vectors(x,y,z,x2,y2,z2)
var x_dif=argument[3]-argument[0];
var y_dif=argument[4]-argument[1];
var z_dif=argument[5]-argument[2];
return radtodeg(arcsin(z_dif)/sqrt((x_dif*x_dif)+(y_dif*y_dif)+(z_dif*z_dif)));

And i was like: oh right, it seems to be ok.

But suddenly in GM, a weird error showed to me:

___________________________________________
############################################################################################
ERROR in
action number 1
of Draw Event
for object vect

Error in function arcsin().
 at gml_Script_pitch_from_vectors (line 5) - return radtodeg(arcsin(z_dif)/sqrt((x_dif*x_dif)+(y_dif*y_dif)+(z_dif*z_dif)));
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Script_pitch_from_vectors (line 5)
called from - gml_Object_vect_DrawEvent_1 (line 9) - pitch=pitch_from_vectors(x,y,z,cam.x,cam.y,cam.z)

What is that? , i obviously checked if the z vars of objects were declared, and i'm sure that z's have values, and are also defined in the objects.

 

[Edgamer63]

Oh sorry, i solved it myself, it was an operational error, and here's the solution:

///pitch_from_vectors(x,y,z,x2,y2,z2)
var x_dif=argument[3]-argument[0];
var y_dif=argument[4]-argument[1];
var z_dif=argument[5]-argument[2];
return radtodeg(arcsin(z_dif/sqrt((x_dif*x_dif)+(y_dif*y_dif)+(z_dif*z_dif))));

Anyway a useful topic .