Is the temp variable removed in lite-c?

I'm definately not a coder, but this DOES work, from my experience.
Usually all you have to do is put something like this at the beginning of your script (if it's a vector your talking about):

Vector temp; // you must define vectors in Lite-C
vec_zero (temp); // and then zero it out before use

Now you can use it in the function, or action your needing it for. just remember though, if it's a different "temp" then create a new vector for each one:

Vector temp1;
vec_zero (temp1);

etc...

I see, because C-script has temp build-in.

So is there any different for the following? In c-script I just use temp for both.

VECTOR temp;
ANGLE temp;

In fact there is.

When I used the vec_rotate command it sometimes led to weird results when the second argument was a VECTOR and not an ANGLE.

Example:

The code

Code:

---

...
vec_rotate(temp, vector(angle, 0, 0));
...

---

did not work properly all the time (here "angle" is just a var), but the code:

Code:

---

ANGLE temp_ang;

...
temp_ang.pan = angle;
temp_ang.tilt = 0;
temp_ang.roll = 0;
vec_rotate(temp, temp_ang);
...

---

works. It was a little confusing at first, but it seems that the casting from VECTOR to ANGLE and back, easy as it might seem, causes internal problems.

Regards,
Gnometech

P.S.: BTW the "temp" I used above is a VECTOR variable I had to defined, it is not predefined anymore. Maybe it would be worth a suggestion to move such C-Script pre-defined things (like ENTITY* player;) into default.c

You must define Vectors for each operation that you want to do, just define them at the beginning of your code, it's worked for me thus far. You don't however have to define them for predefined entities (my, you, etc)
I believe the exact words from the manual are "always initialize variables"..

I convert my c-script to lite-c, and compile successfully.

But I got lot of E1513 crash when I run the program.

I use ent_create a lot, what is the trick to avoid crash?

post the function that called the error

This will crash the main()
Code:

---

#include <default.c>

STRING* testLevel = "level0.wmb"; 
BMAP* crosshair = "crosshairsmall.pcx";
VECTOR* mouse_target; // mouse target position in 3D world

// Get the target vector 

function get_target()
{
	my.push = 2;
	set(me,INVISIBLE);
	VECTOR* vecFrom;
	VECTOR* vecTo;
	vec_zero(vecFrom);
	vec_zero(vecTo);

	while(1)
	{
		//store the mouse position to vecFrom
		vecFrom.x = mouse_pos.x + mouse_spot.x;
		vecFrom.y = mouse_pos.y + mouse_spot.y;
		vecFrom.z = 1;//close point
		vec_set(vecTo,vecFrom); //set the vecTo same as vecFrom
		vec_for_screen(vecFrom,camera); //world position of mouse position
		vecTo.z = 5000;//vecTo 10000 away from camera
		vec_for_screen(vecTo,camera);//far point
		c_trace(vecFrom, vecTo, IGNORE_PASSABLE|IGNORE_PUSH);//trace a line between the two points
		vec_set(mouse_target,target); //put the c_trace target vector to mouse_target
		wait(1);
	}
}


function main()
{
	level_load(testLevel);
	wait(2); // wait until the level is loaded

	vec_zero(mouse_target);
	mouse_range = 3000; //mouse range from camera
	mouse_mode = 1; //make cursor visible and moving
	mouse_pointer = 0;
	mouse_map = crosshair; //mouse bmap
	mouse_spot.x = bmap_width(crosshair)/2; // hot spot in the bmap center
	mouse_spot.y = bmap_height(crosshair)/2;
	wait(1);
	video_switch(6,0,2);

	ent_create("crosshairsmall.pcx", nullvector, get_target);
}

---

Do not use vec_zero to intiialize a pointer. Use it to initialize a "pointee".

In other words: vec_to and vec_from should be of type VECTOR and not VECTOR*.
------------------------------------------------------------------
Alternatively you could initialize the pointers by writing:

vec_to = vector(0,0,0);

The "vector" instruction will return a pointer, just what we need here. So, in this case, you could continue writing VECTOR*. One of the two approaches should work, the second one does for me.

Gnometech

I see. Thank you!