How do i place a bmap so that it follows where the enemy is relative to the camera? I dont even know where to start...

kinda like runescape... like this: (the green and red bars are life bars)


Can someone please help me get started?


Thanks,
Devon
S.D.S.D.inc.

You need to use vec_to_screen. It converts 3D world coordinates into 2D screen coordinates (You can find this in the manual if you look, ).

You need to define where you want the health bar to be relative to the entity's position with a vector:

Code:

---

function set_vec_params()
{
	while(1)
	{
		vec_set(temp,vector(ent.x,ent.y,ent.z + height_var);
		wait(1);
	}
}

---

Then you use vec_to_screen to convert this vector into 2D screen coordinates:

Code:

---

function set_vec_params()
{
	while(1)
	{
		vec_set(temp,vector(ent.x,ent.y,ent.z + height_var);
		vec_to_screen(temp,camera);
		wait(1);
	}
}

---

Then use pan_setpos to match the health bar's coordinates with temp's:

Code:

---

function set_vec_params()
{
	while(1)
	{
		vec_set(temp,vector(ent.x,ent.y,ent.z + height_var);
		vec_to_screen(temp,camera);
		pan_setpos(health_pan,5,1,temp);
		wait(1);
	}
}

---

This should (if not let me know) give you a health bar that follows the player('s) entity(s) around the map.

pan_setpos(health_pan,5,1,temp);

how does this work? what is health_pan? is it a panel? or a bmap?

also, what is the 5 and the 1? what do they do?

Sorry
Devon
S.D.S.D.inc.

Ps. This code isnt in the manual... at least i couldnt find it in there...

i did vind it in manual

pan_setpos(PANEL*, var type, var num, VECTOR* xy)
Changes the xy position of a panel element.

Parameters:
PANEL* Panel pointer.
type Element type:
1 = digits
3 = button, toggle
4 = slider
5 = window
6 = needle


num Number of the element, starting with 1.
xy Vector containing the element's new x and y values

Remarks:
The changed element is not saved by game_save.
Example:
pan_setpos(_dbg_pan,1,1,vector(20,30,0));

Yes, you need to use a panel with a window for your health bar, and set the x, y, and "z" position of the panel to match the entity's.

The z coordinate of the vector that the panel is matching is simply there so that the engine can accurately imitate to panel being in 3D space. Of course if you want the panel to resize ifself according to distance from the camera, you'll probably have to use vec_dist.

Hope I've helped, .

Hmmm... so i've tried it out... and i cant seem to get it to work...
All it does is place the panel in the corner of the screen...

is what i have done correct? here is what ive got:


Basically, its checking to see if i've hit something after i swung my sword, and if i have, and its health is greater then 0 (so if it even has health) then it will show the enemies hp above the enemies head...

Code:

---

bmap ehp = <ehpbar.bmp>;
panel enemy_health_pan{
	window = 0,0,80,10,ehp,temp.x,temp.y);
}

IF(result != 0){
	IF (you != null) {
		you.health -= weapon_power;
			
		if(you.health > 0){
			enemy_health_pan.visible = on;
				
			vec_set(temp,vector(you.x,you.y,you.z + height_var));
			vec_to_screen(temp,camera);		
			pan_setpos(enemy_health_pan,5,1,temp);
				
			}else{
				
			enemy_health_pan.visible = off;
				
		}
			
	}
}

---

I also dont understand where i put the enemies health variable in this equation.. help? please


Thanks again,
Devon.
S.D.S.D.inc.