Physics projectiles and image angles [SOLVED]

[Warspite2]

I have a physics game with a player helicopter. Player presses key to apply physics force on y axis to raise heli. Below are AA tanks which fire bullets at the heli. How can I get the aa bullets to shoot straight? I would rather the bullet not use physics but if I uncheck uses physics then it dont do anything. Not sure how else to tell gms2 to not use physics on this particular object. Basically I just want the aa bullet to fire straight at the player as normal. I also tried other settings such as checking sensor and/or kinematic.

So normally without physics I just use a move_towards_point to achieve this. I seen some other threads here but not complete what I am wanting to do. Any help appeciated and thanks in advance.

 

[The Shatner]

Warspite2, maybe you could set the physics-related vars of the bullets to ridiculous levels so that they're not actually affected by the physics engine. For example, setting linear and angular damping to 0, setting phy_fixed_rotation to true, etc.

 

[Pyxus]

I have a physics game with a player helicopter. Player presses key to apply physics force on y axis to raise heli. Below are AA tanks which fire bullets at the heli. How can I get the aa bullets to shoot straight? I would rather the bullet not use physics but if I uncheck uses physics then it dont do anything. Not sure how else to tell gms2 to not use physics on this particular object. Basically I just want the aa bullet to fire straight at the player as normal. I also tried other settings such as checking sensor and/or kinematic.

So normally without physics I just use a move_towards_point to achieve this. I seen some other threads here but not complete what I am wanting to do. Any help appeciated and thanks in advance.

Can you clarify what you mean by unchecking physics doesn't do anything?

 

[Warspite2]

Thanks guys! It seems setting all fields in physics properties for the bullet to 0 except density to 0.1 is definitely getting on the right track here. Also phy_fixed_rotation set to true solves then crazy spinning bullets. I uncheck uses physics on my bullet and it will be created but not move or anything else. Not sure why I could not just uncheck it and have the object behave normally, that is what I thought it would do. Anyway the bullets seem to work ok like this with the fields set to 0.

Only other issue I am having now is having the turret point at the enemy. Normally I use image_angle = point_direction(x,y,x,y); but seems phy_rotation=point_direction(x,y,oHeli.x,oHeli.y); is what I need to use in a physics world but for one reason or another it does not point at heli and appears to be off about 45 degrees or so. I tried phy_rotation=point_direction(x,y,oHeli.x,oHeli.y)-45 and phy_rotation=point_direction(x,y,oHeli.x,oHeli.y)-180; but no luck. There must be something else I need to do? I will check around more in the forums for this.

Edit: For turret rotation I need to put the minus in like so...

phy_rotation = -point_direction(x,y,oHeli.x,oHeli.y);

In the end my bullet code is as follows and I list it here in case others need help...

Physics Properties:
Density: 0.1
The other 5 fields are 0
Only start awake is checked

Create Event:
phy_rotation = -point_direction(x,y,oHeli.x,oHeli.y);
physics_apply_local_impulse(0,0,1,0);
phy_fixed_rotation = true;

Step Event:
physics_apply_force(x,y,0,-1);
//so it don't slow and fall short

I marked this as solved although I am still unsure what the use for the 'uses physics' box is. Seems as if you have a physics world that box must be checked for the most part.