camera-independent 3rd-person movement?

[vAethor]

I have a 3rd-person WAD going with my friend, and am thinking of fine-tuning the 3rd-person camera script I wrote months ago to make Doomguy's movement independent of the camera, if possible.

Basically I am aiming for more of a 3D platformer-style camera, like what many PS1 and N64 games used. Sonic Robo-Blast 2 managed to do it on Doom Legacy, so I'd assume GZDoom would have a way to do it too.

My code is currently a simple chasecam script I got from the wiki. The ACS for it is below.

Code: Select all

//Third person camera simulation.
//solarsnowfall

#include "zcommon.acs"

#define C_TID		1000	//Default camera tid
#define MAX_R		192	//Maximum radius (or distance from the player) (128 def)
#define ADJUST_R	8	//Amount to adjust the camera by (8 def)
#define VIEW_HEIGHT	61.0	//The approximate height of the player's view (41 def)

bool cam_mode[8];		//Variable for turning the camera on or off.
	
Script 1 ENTER
{
	cam_mode[PlayerNumber ()] = ON;
	ACS_ExecuteAlways (3, 0, PlayerNumber ());
}

Script 2 RESPAWN
{
	cam_mode[PlayerNumber ()] = ON;
	ACS_ExecuteAlways (3, 0, PlayerNumber ());
}

Script 3 (int p_num)
{
	int r = MAX_R;
	
	while (cam_mode[p_num] == ON)
	{	
		int a = GetActorAngle (0);
		int p = GetActorPitch (0);
		int x = GetActorX (0);
		int y = GetActorY (0);
		int z = GetActorZ (0) + VIEW_HEIGHT;
		int xyr = r * cos (p) >> 16;
		
		if (!ThingCountName ("ChaseCam", C_TID+p_num))
		{
			while (!Spawn ("ChaseCam", x-cos(a)*xyr, y-sin(a)*xyr, z+sin(p)*r, C_TID+p_num, a >> 8) && r > 0)
			{
				r -= ADJUST_R;
				xyr = cos (p) * r >> 16;
			}
			
			if (ThingCountName ("ChaseCam", C_TID + p_num))
				ChangeCamera (C_TID + p_num, 0, 0);
			else
			{
				cam_mode[p_num] = OFF;
				print (s:"Camera script failed to initialize.");
			}
		}
		
		
			        else
		{
			while (!SetActorPosition (C_TID+p_num, x-cos(a)*xyr, y-sin(a)*xyr, z+sin(p)*r, 0) && r > 0)
			{
				r -= ADJUST_R;
				xyr = cos (p) * r >> 16;
			}
			
			SetActorAngle (C_TID + p_num, a);
			SetActorPitch (C_TID + p_num, p);
			
			if (r < MAX_R) 
                              r += ADJUST_R;
		}
		
		delay (1);
	}
}

Script 4 DEATH
{
	cam_mode[PlayerNumber ()] = OFF;
	Thing_Remove (C_TID + PlayerNumber ());
}

Script 5 (int p_num) DISCONNECT
{
       cam_mode[p_num] = OFF;
       Thing_Remove (C_TID + p_num);
}

I know almost no ACS and simply copied this from the Zdoom Wiki intending to learn what everything does later. While I wait for replies I can probably do some research.

Edit: I understand the gist of what the script does. My guess is changing some values in this block would do something.

Code: Select all

		while (!SetActorPosition (C_TID+p_num, x-cos(a)*xyr, y-sin(a)*xyr, z+sin(p)*r, 0) && r > 0)
			{
				r -= ADJUST_R;
				xyr = cos (p) * r >> 16;
			}
			
			SetActorAngle (C_TID + p_num, a);
			SetActorPitch (C_TID + p_num, p);
			
			if (r < MAX_R) 
                              r += ADJUST_R;
		}
		
		delay (1);

I commented out the SetActorAngle() line and got strange results, not what I was looking for. But I think I may be onto something.