Setting vector angles to player view on a projectile

[kingsal]

Hello!

Is it possible to set the direction of a projectile's model to match that of the player view?

This is an inventory item similar to a mine, but it flies out in the direction of the player view.

 

This is the script I am using (copied from the mine)

void playertools_sporebomb::inventoryUseKeyRelease(entity userEntity, entity eFrobbed, float holdTime){	entity projectile = sys.spawn(getKey("def_projectile"));		vector viewAngles = $player1.getViewAngles();	vector direction = sys.angToForward(viewAngles);	vector velocity = direction;	velocity *= getVelocityFactorForHoldTime(holdTime);	vector origin = $player1.getEyePos();	origin += direction * 30;	projectile.setOrigin(origin);	string soundShader = projectile.getKey("snd_throw");	sys.cacheSoundShader(soundShader);	// If the soundchannel argument is empty, the float defaults to 0, which is SND_CHANNEL_ANY	projectile.startSoundShader(soundShader, SND_CHANNEL_BODY);	// Callback to decrease the inventory stack count	$player1.changeInvItemCount(getKey("inv_name"), getKey("inv_category"), -1);	projectile.launch( origin, direction, velocity );	// Clear the projectile's CONTENT_PROJECTILE flag so that it doesn't collide with the player in the first few hundred msec.	float savedClipMask = projectile.getClipMask();	projectile.setClipMask(PROJECTILE_LAUNCH_CLIPMASK);	// Reset the clipmask back to normal after a certain amount of time	sys.wait(projectile.getFloatKey("delay"));	projectile.setClipMask(savedClipMask);}

And the def I am using for the projectile.

entityDef projectile_sporebomb{	"inherit"		    		"atdm:projectile_base"	"spawnclass"				"idProjectile"	"editor_displayFolder"		        "playertools/base/projectiles"		"fire_along_playerview"		        "1"			"bindOnImpact"				"0"	"model" 		    		"models/darkmod/weapons/sporebomb.ASE"	"mins"       				"-1 -1 -2"	"maxs"       				"1 1 0"	"cone"       				"3"		//"def_damage"				"damage_wineBottle"		"has_result"				"1"	"def_result"				"result_sporebomb"	"active_surfaces"			""	        //"angles"            		        "0 0 0" //This was the culprit. Setting the angles to 0 0 0 was over-riding the code that orients the projectile to the player view. 	//"axial_dir"			        "0 0 0"	//"launchFromBarrel"			"1"	"health"				"5"						"velocity"				"10 0 0"	"angular_velocity"			"0 0 0"				"thrust"				"0"				"thrust_start"				"0"						"thrust_end"				"0"						"linear_friction"			"0"	"angular_friction"			"0"	"contact_friction"			"0"	"bounce"				"0"		"mass"					"20"	"gravity"				"10"					"fuse"					"5"			"detonate_on_fuse"			"1"						"detonate_on_death"			"1"						"detonate_on_world"			"1"						"detonate_on_actor"			"1"						"impact_damage_effect"		        "1"						"impact_gib"				"0"							"snd_fly"					""	"snd_throw"					"gasbomb_flight" //TEMP	"snd_drop"					""	}

Edited October 1, 2016 by kingsal

[kingsal]

Update:

 

I found a solution by removing the "angles" from my .def file. This was over-riding the projectile code that orients the model to the player's view vector.

It would still be interesting to see what the code would look like in a script however..

[Obsttorte]

Check the script files for the player tools includded in the mod. There you can see how it is done.

[kingsal]

Hmm, I'll take a look in there and see what I can dig out.

 

Is there anyway to cap the maximum velocity on a projectile but still factor in a hold time? I know you can set some global variables that will change the hold time velocity factor, but that seems to break a lot of stuff.

 

This is the projectile script I am looking at:

 

I've set a max_velocity key, I'm just not sure how to say always make getVelocityFactorForHoldTime(holdTime) <= max_velocity.

void playertools_sporebomb::inventoryUseKeyRelease(entity userEntity, entity eFrobbed, float holdTime)
{
		
	
	entity projectile = sys.spawn(getKey("def_projectile"));
	
	//The following lines do bad things.
	//HOLD_TIME_MIN_VELOCITY = projectile.getFloatKey("hold_time_min_velocity");
	//HOLD_TIME_MAX_VELOCITY = projectile.getFloatKey("hold_time_max_velocity");							
	//MIN_VELOCITY = projectile.getFloatKey("min_velocity");
	//MAX_VELOCITY = projectile.getFloatKey("max_velocity");	
	
	float max_velocity = projectile.getFloatKey("max_velocity");
	
	vector viewAngles = $player1.getViewAngles();
	vector direction = sys.angToForward(viewAngles);

	vector velocity = direction;
	velocity *= getVelocityFactorForHoldTime(holdTime);

	vector origin = $player1.getEyePos();
	origin += direction * 30;
	projectile.setOrigin(origin);
	
	
	string soundShader = projectile.getKey("snd_throw");
	sys.cacheSoundShader(soundShader);

	// If the soundchannel argument is empty, the float defaults to 0, which is SND_CHANNEL_ANY
	projectile.startSoundShader(soundShader, SND_CHANNEL_BODY);

	// Callback to decrease the inventory stack count
	$player1.changeInvItemCount(getKey("inv_name"), getKey("inv_category"), -1);

	projectile.launch( origin, direction, velocity );

	// Clear the projectile's CONTENT_PROJECTILE flag so that it doesn't collide with the player in the first few hundred msec.
	float savedClipMask = projectile.getClipMask();
	projectile.setClipMask(PROJECTILE_LAUNCH_CLIPMASK);

	// Reset the clipmask back to normal after a certain amount of time
	sys.wait(projectile.getFloatKey("delay"));
	projectile.setClipMask(savedClipMask);
}

Edited October 2, 2016 by kingsal

[Obsttorte]

Those values are defined in tdm_playertools.script

 

#define HOLD_TIME_MIN_VELOCITY 200        // The minimum hold time (a threshold)
#define HOLD_TIME_MAX_VELOCITY 1200        // The maximum hold time to achieve MAX_VELOCITY
#define MIN_VELOCITY 0                    // The velocity for holdTime <= HOLD_TIME_MIN_VELOCITY
#define MAX_VELOCITY 900                // The velocity for holdTime > HOLD_TIME_MAX_VELOCITY

and used later on here

 

/**
* greebo: This returns the velocity factor for a given hold time.
*          the factor is clamped to MIN_VELOCITY and MAX_VELOCITY.
*          Below the threshold HOLD_TIME_MIN_VELOCITY, the factor is MIN_VELOCITY.
*          Above HOLD_TIME_MAX_VELOCITY the factor is MAX_VELOCITY.
*          Between those two values, the factor is interpolated.
*/
float getVelocityFactorForHoldTime(float holdTime) {
    float velocityFactor;
    
    if (holdTime > HOLD_TIME_MIN_VELOCITY) {
        velocityFactor = (holdTime - HOLD_TIME_MIN_VELOCITY) / (HOLD_TIME_MAX_VELOCITY - HOLD_TIME_MIN_VELOCITY);
        velocityFactor *= MAX_VELOCITY;
    }
    else {
        velocityFactor = MIN_VELOCITY;
    }

    return velocityFactor;
}

If you don't want to use that values, I would suggest that you write your own version of that function and use that instead.

 

So the beginning of your script could look like this

 

// change these values as you want them. you can use shorter names of course, but make sure they aren't already used.
#define HOLD_TIME_MIN_VELOCITY_CUSTOM 200        // The minimum hold time (a threshold)
#define HOLD_TIME_MAX_VELOCITY_CUSTOM 1200        // The maximum hold time to achieve MAX_VELOCITY
#define MIN_VELOCITY_CUSTOM 0                    // The velocity for holdTime <= HOLD_TIME_MIN_VELOCITY
#define MAX_VELOCITY_CUSTOM 900                // The velocity for holdTime > HOLD_TIME_MAX_VELOCITY
// again the naming can be different
float getVelocityFactorForHoldTimeCustom(float holdTime) {
    float velocityFactor;
    
    if (holdTime > HOLD_TIME_MIN_VELOCITY_CUSTOM) {
        velocityFactor = (holdTime - HOLD_TIME_MIN_VELOCITY_CUSTOM) / (HOLD_TIME_MAX_VELOCITY_CUSTOM - HOLD_TIME_MIN_VELOCITY_CUSTOM);
        velocityFactor *= MAX_VELOCITY_CUSTOM;
    }
    else {
        velocityFactor = MIN_VELOCITY_CUSTOM;
    }

    return velocityFactor;
}