lua sleep() for multiple fireballs

[lexdr]

Hi all,

I've tried to create a new spell - based on the original fireball spell - that cast a fireball every few milliseconds. The number of fireballs depends of caster's skill. The simplest way was to use a sleep(300) commande in lua spell object, but it not seems to work.
Is it possible?

To achieve my goal, I've created a script hook that temporary spawn a spawner, a counter and a timer, but in this case fireballs are spawn from the center of the square in front of the party.
How can I spawn a "real fireball", created from behind the screen on caster's side, with the same effects?
In other words, what is the equivalent script command to the "fireball" command in the original fireball spell's object?

Thanks,
Lex

[Leki]

OnCast hook, get champion and then use offset (take care of party direction). Smth like this:

Code: Select all

-- projectile config for champions on left and right side of cell
		if facing == 0 or facing == 3 then
			offsetX = {-0.6,0.6,-0.6,0.6}
			offsetZ = {-0.6,0.6,-0.6,0.6}
		else
			offsetX = {0.6,-0.6,0.6,-0.6}
			offsetZ = {0.6,-0.6,0.6,-0.6}
		end
...
shootProjectile("sh_bolter_bolt_projectile", party.level, party.x, party.y, party.facing, 25, 0, 0, offsetX[champ_num], 0, offsetZ[champ_num], 20, party, true, champ_num)		
...	

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[lexdr]

Thank you for your reply Leki!

However, the shootProjectile("any spell object",...) doesn't work and stop the running party on the editor.
It works with physical objects, but not with magic objects (such as "fireball" or other spell's objects).

Any idea?

Lex

[Leki]

Not tested and there is typos etc - but it shows how to do it.
You need custom spell "Leveled Fireball", in OnCast hook, do what you need - see script for inspiration, imho the best way is to ignore timers etc and spawn firebals in one moment, but you can change their speed and change main offset a liitle bit- so it will look good, and no timer/party move during casting sequence issues etc. You also need to spawn your "invisible_leveled_fireball" to solve on hit, lighting and sound effects. It's without particle, so it can be spawned in the centre of the cell etc... It's a little bit chaotic, but hope you understand what you have to do...

Code: Select all

defineSpell{
	name = "leveled_fireball",
	uiName = "leveled Firebal",
	skill = "fire_magic",
	level = 0,
	runes = "ABCDE",
	manaCost = 0,
	onCast = function (champ, x, y, facing, skill)	
		
		champ_num = champ:getOrdinal()
		champ_level = champ:getLevel() -- or use fire magic skill if you wish

		-- projectile config for champions on left and right side of cell
		-- single shot
		if facing == 0 or facing == 3 then
			offsetX = {-0.6,0.6,-0.6,0.6}
			offsetZ = {-0.6,0.6,-0.6,0.6}
		else
			offsetX = {0.6,-0.6,0.6,-0.6}
			offsetZ = {0.6,-0.6,0.6,-0.6}
		end
			
		-- spawn projectile
		if champ_level < 2 then
				shootProjectile("spell_projectile", party.level, party.x, party.y, party.facing, 25, 0, 0, offsetX[champ_num], 0, offsetZ[champ_num], 20, party, true, champ_num)
				
		elseif champ_level > 2 and champ_level < 4 then
			
				shootProjectile("spell_projectile", party.level, party.x, party.y, party.facing, 25, 0, 0, offsetX[champ_num]+0.1, 0, offsetZ[champ_num]+0.1, 20, party, true, champ_num)
				shootProjectile("spell_projectile", party.level, party.x, party.y, party.facing, 20, 0, 0, offsetX[champ_num], 0, offsetZ[champ_num], 20, party, true, champ_num)
				
		end

-- or use smth like

Code: Select all

		

		for i = 0,champ_level step 3 do
			spd = math.random()*30
			offs = math.random()*30/100
			pwr = math.random()*(champ_level * 10) 
			shootProjectile("spell_projectile", party.level, party.x, party.y, party.facing, 25, 0, 0, offsetX[champ_num], 0, offsetZ[champ_num], 20-pwr, party, true, champ_num)
                         -- here spawn your invisible_leveled_fireball
                          -- you can set up damage in invisible_leveled_fireball spell or in projectile
		end

	end,
}[/color]

You also need invisible fireball spell, to get light and on hit effect

defineObject{
name = "invisible_leveled_fireball",
class = "ProjectileSpell",
particleSystem = "invisible_fireball", -- here use your custom "null particle", so spell will fly, but without tracks - find particle definitions and clone them
hitParticleEffect = "fireball_hit",
lightColor = vec(1, 0.5, 0.25),
lightBrightness = 15,
lightRange = 7,
lightHitBrightness = 40,
lightHitRange = 10,
castShadow = true,
launchSound = "fireball_launch",
projectileSound = "fireball",
hitSound = "fireball_hit",
screenEffect = "fireball_screen",
projectileSpeed = 7.5,
attackPower = 30,
damageType = "fire",
tags = { "spell" },
}

[lexdr]

Yes, I understand: as far as the shootProjectile() can't be used to shoot ProjectileSpell object, I have to create a new visual projectile item object that can be shooted with the shootProjectile() when cast. And for damages, I just spawn as I did an invisible ProjectileSpell object to make damages.

Thank you very much for your help Leki.

[Leki]

Yes.
If you use spell for damage, it will manage exp as well etc. If you wanna use projectile, you have to take care about championOrdinal:

shootProjectile(projectile, level, x, y, direction, speed, gravity, velocityUp, offsetX, offsetY, offsetZ, attackPower, ignoreEntity, fragile, championOrdinal)
Shoots a projectile item. The parameters are:

projectile: the name of the item to shoot.
level,x,y: the initial position of the projectile in a level.
direction: the shooting direction (0=north, 1=east, 2=south, 3=west).
speed: the speed of the projectile (metres/second). Typical values around 10.
gravity: the gravity force in y-direction. Typical values around 0.
velocityUp: the initial velocity in y-direction. Typically set to 0.
offsetX,offsetY,offsetZ: 3D offset in world space from the center of cell.
attackPower: attack power of the projectile.
ignoreEntity: the entity to be ignored for collisions (or nil if the entity should not ignore any collisions).
fragile: a boolean flag, if set the projectile is destroyed on impact.
championOrdinal: a champion ordinal number, used for dealing experience points. This parameter is optional.

More in Moding/Scripting reference: http://www.grimrock.net/modding/scripting-reference/

[lexdr]

I defined a new object with the red orb model and used the function you gave me previously to test it.
It works great with the right offsets.

Code: Select all

defineObject{
	name = "dm_orb_of_fire",
	class = "Item",
	uiName = "Orb of fire",
	model = "mod_assets/models/items/orb_of_fire.fbx",
	gfxIndex = 157,
	particleSystem = "orb_of_fire",
	attackPower = 1,
	stackable = false,
	sharpProjectile = false,
	projectileRotationY = 0,
	weight = 0,
}

Code: Select all

defineSpell{
	name = "orb_of_fire",
	uiName = "Orbs of fire",
	skill = "fire_magic",
	level = 2,
	runes = "ABC",
	manaCost = 5,
	onCast = function(caster, x, y, direction, skill)
		if direction == 0 or direction == 3 then
			offsetX = {-0.6,0.6,-0.6,0.6}
			offsetZ = {-0.6,0.6,-0.6,0.6}
		else
			offsetX = {0.6,-0.6,0.6,-0.6}
			offsetZ = {0.6,-0.6,0.6,-0.6}
		end

		shootProjectile("dm_orb_of_fire", party.level, x, y, direction, 25, 0, 0, offsetX[champ_num], 0, offsetZ[champ_num], 2*skill, party, true, caster:getOrdinal())
	end,
}

Do you know if it is possible to add un bunring aspect on the orb?
Adding a fireball particleSystem to the object doesn't work...

To display fireball_hit on impact, we can add bombType = "fire" but I'm not sure this is the right way to do it, as far as the bomb damages supersede the shootprojectile damages.
Any idea?

[Leki]

Add into yours projectile definition line particleEffect = "fireball", as you can see here:

Code: Select all

defineObject{
name = "dm_orb_of_fire",
class = "Item",
uiName = "Orb of fire",
model = "mod_assets/models/items/orb_of_fire.fbx",
gfxIndex = 109,
attackPower = 2,
stackable = false,
sharpProjectile = false,
projectileRotationY = 0,
weight = 0,
particleEffect = "fireball",
}

For hit, exp etc, define your "invisible spell" - for example copy fireball definitions and replace trail part with null particles.

Code: Select all

defineObject{
	name = "fireball",
	class = "ProjectileSpell",
	particleSystem = "fireball",  -- this one replace with smth like "fireball_null_particle"
	hitParticleEffect = "fireball_hit",
	lightColor = vec(1, 0.5, 0.25),
	lightBrightness = 15,
	lightRange = 7,
	lightHitBrightness = 40,
	lightHitRange = 10,
	castShadow = true,
	launchSound = "fireball_launch",
	projectileSound = "fireball",
	hitSound = "fireball_hit",
	screenEffect = "fireball_screen",
	projectileSpeed = 7.5,
	attackPower = 30,
	damageType = "fire",
	--cameraShake = true,
	tags = { "spell" },
}

You need to create your fireball_null_particle, smth like:

Code: Select all

defineParticleSystem{
	name = "fireball_null_particle",
	emitters = {
		-- glow
		{
			spawnBurst = true,
			emissionRate = 1,
			emissionTime = 0,
			maxParticles = 1,
			boxMin = {0,0,-0.1},
			boxMax = {0,0,-0.1},
			sprayAngle = {0,30},
			velocity = {0,0},
			texture = "assets/textures/particles/glow.tga",
			lifetime = {1000000, 1000000},
			colorAnimation = false,
			color0 = {0.3, 0.13, 0.06},
			opacity = 1,
			fadeIn = 0.1,
			fadeOut = 0.1,
			size = {1.5, 1.5},
			gravity = {0,0,0},
			airResistance = 1,
			rotationSpeed = 2,
			blendMode = "Additive",
			objectSpace = true,
		}
	}
}

Dont forget to synchronize projectile speed with the spell - it's 10 if I'm not wrong.

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[Diarmuid]

Dont forget to synchronize projectile speed with the spell - it's 10 if I'm not wrong.

Fireball speed is 7.5

[Leki]

Dont forget to synchronize projectile speed with the spell - it's 10 if I'm not wrong.

Fireball speed is 7.5

Hehe, so 10 is lighting ball I guess