Help with Water Slide Effect

[Mechanic]

Hello all. I found the slide effect I am looking for that came from the map on ice terrain which I just uploaded file to this forum. I need help to build a trigger for a ship to be sailing on water to work like sliding effect. I want the sliding effects to be like those GIF videos I just uploaded to this forum. How do I do this? Please help me. Thank you!

 

[Mechanic]

@Dr Super Good

 

[Dr Super Good]

With a bit of trigger knowhow you can extract the triggers from the map itself. However below is a brief explanation as to how it is done if one wants to recreate the system from scratch.

The key mechanic behind it is the use of SetUnitX and SetUnitY functions. These functions change a unit's position without interrupting their current order or movement (a problem with the GUI move unit actions).

One creates a physics system of sorts using these functions. For example you have an X velocity and Y velocity which gets applied to offset the unit's position every tick. This accelerates towards the a target point until its magnitude is some maximum. The target point could be the point the unit is ordered to.

For this to be MUI one would keep the values in a set of arrays where each index represents a single unit. All indices could be iterated through and updated 30 times a second or so for smooth movement.

One could also add a friction factor based on the current velocity. This means no maximum is needed since as the unit's speed increases so will the deceleration from friction until a natural limit is reached.

One can set the unit to have a very low movement speed so the system is almost entirely responsible for movement. Alternatively you could track unit position independently and cancel out the native unit movement, possibly using the lost displacement to calculate an acceleration vector.

There are a lot of ways this could be implemented. On will have to experiment to find the one that best suits your needs.

 

[Mechanic]

Okay. I was just trying to ask you if you know how to make this trigger out of GUI. I just found the GUI for the slide effects, but I don't know how to get it connected into my map to be working on hero ships only. I really like how the slide effects created on this ice terrain, but all you showed me is a sentences, and I am not good at WC3 english. But, I still prefers to make trigger than GUI. Do you know anybody who can make trigger the way I wanted it to be?

 

[Dr Super Good]

The trigger can still be made using GUI. Outside of usual leak clean-up, one needs to use the following lines of custom script to move the units.

JASS

call SetUnitX(udg_TempUnit, udg_TempRealX)
call SetUnitY(udg_TempUnit, udg_TempRealY)

Lua

SetUnitX(udg_TempUnit, udg_TempRealX)
SetUnitY(udg_TempUnit, udg_TempRealY)

TempUnit is a unit variable
TempRealX is a real variable
TempRealY is a real variable

Set the variables before calling the functions.

I think some slide systems exist in the Spells resource section. One might be able to copy these into your map.

 

[Mechanic]

What about the condition? I want change the condition that is only works on ice terrain in this map, but I want change this condition to be only on hero ships, you know? All of this GUI is great, but I just need to figure out how to get it into my map and change the condition to be on hero ships only.

I think this is the slide GUI.

library Objects requires UnitZ, InstanceIterator, Vector, Boundary, UnitCollision, ObjectInit, LinkedList

    struct Object //Treated as cylinders
        static thistype dis
        real radius
        real height
        real mass
        Vector velocity
        real lastX
        real lastY
        real lastZ
       
        real movementX
        real movementY
        boolean moving
       
        /*static method EnumObjectsInRange takes real x, real y, real radius, code c returns nothing
           
        endmethod*/
       
        implement ObjectList
       
        static method createFilter takes unit u returns boolean
            return IsUnitType(u, UNIT_TYPE_OBJECT)
        endmethod
       
        method onCreate takes nothing returns nothing
            set radius = GetUnitCollisionSize(me)
            set height = GetUnitHeight(me)
            set mass = GetUnitMass(me)
            set velocity = Vector.create(0.00, 0.00, 0.00)
            call listAdd()
        endmethod
       
        method onDestroy takes nothing returns nothing
            call stop32()
            call velocity.destroy()
            call listRemove()
        endmethod
       
        implement AutoCreate
        implement AutoDestroy
       
        static method collision takes nothing returns boolean
            local thistype this = dis
            local thistype that
            local unit f = GetFilterUnit()
            local Vector d
            local Vector v1
            local Vector v2
            local Vector v3
            local Vector v4
            local real l1
            local real l2
            if f != .me and IsUnitType(f, UNIT_TYPE_OBJECT) and RAbsBJ(GetUnitZ(.me) - GetUnitZ(f)) <= 100.0 then
                set d = Vector.create(GetUnitX(f) - GetUnitX(.me), GetUnitY(f) - GetUnitY(.me), GetUnitZ(f) - GetUnitZ(.me))
                set that = thistype[f]
                if Vector.dotProduct(this.velocity, that.velocity) <= 0.00 then
                    if Vector.dotProduct(this.velocity, d) <= 0.00 then
                        set f = null
                        call d.destroy()
                        return false
                    endif
                else
                    if Vector.dotProduct(this.velocity, d) <= 0.00 then
                        set l1 = this.velocity.getLength()
                        set l2 = that.velocity.getLength()
                    else
                        set l1 = that.velocity.getLength()
                        set l2 = this.velocity.getLength()
                    endif
                    if l1 >= l2 then
                        set f = null
                        call d.destroy()
                        return false
                    endif
                endif
                set v1 = Vector.projectionVector(that.velocity, d)
                set v2 = Vector.projectionVector(this.velocity, d)
                if RAbsBJ(v2.getLength() - sgn(Vector.dotProduct(v1, v2))*v1.getLength()) > PLAYER_BUMP_SFX_THRESHOLD then
                    call d.setLength(d.getLength()/2)
                    call Sfx(PLAYER_BUMP_SFX_PATH, GetUnitX(.me) + d.x, GetUnitY(.me) + d.y, GetUnitZ(.me), Atan2(d.y, d.x)*bj_RADTODEG + 180.0, 0.00, 0.7)
                endif
                set l1 = d.x
                set d.x = -d.y
                set d.y = l1
                set v3 = Vector.projectionVector(this.velocity, d)
                set v4 = Vector.projectionVector(that.velocity, d)
               
                call this.velocity.destroy()
                call that.velocity.destroy()
                set this.velocity = v1
                call this.applyVector(v3)
                set that.velocity = v2
                call that.applyVector(v4)
               
                call d.destroy()
                call v3.destroy()
                call v4.destroy()
                set f = null
            endif
            return false
        endmethod
       
        method iterate32 takes nothing returns nothing
            local real z
            local Vector v
           
            if ((selection == 3 or selection == 4) and .moving and IsUnitType(.me, UNIT_TYPE_PLAYER)) then
                if (.velocity.getLength() < PLAYER_MAX_SLIDE_SPEED) then
                    set v = Vector.create(PLAYER_SLIDE_SPEED_ICE * Cos(GetUnitFacing(.me) * bj_DEGTORAD), PLAYER_SLIDE_SPEED_ICE * Sin(GetUnitFacing(.me) * bj_DEGTORAD), 0.00)
                    call .applyVector(v)
                    call v.destroy()
                    call GroupEnumUnitsInRange(enumGroup, .movementX, .movementY, POSITION_RADIUS, Filter(function thistype.checkEnd))
                endif
            endif
            if radius > 0.00 then
                if GetUnitFlyHeight(me) < 1.00 then
                    call EnableUnitCollision(me)
                    if velocity.getLength() > PLAYER_FRICTION_GROUND then
                        call .velocity.setLength(.velocity.getLength() - PLAYER_FRICTION_GROUND)
                    else
                        call SetUnitFlyHeight(.me, 0.00, 0.00)
                        call .velocity.setLength(0.00)
                        call .stop32()
                        return
                    endif
                else
                    set .velocity.z = .velocity.z - GRAVITY_ACCELERATION
                    if .velocity.getLength() > PLAYER_FRICTION_AIR then
                        call .velocity.setLength(.velocity.getLength() - PLAYER_FRICTION_AIR)
                    else
                        call .velocity.setLength(0.00)
                    endif
                endif
            endif
            if RectContainsCoords(bj_mapInitialPlayableArea , GetUnitX(.me) + .velocity.x, GetUnitY(.me) + .velocity.y) then
                if GetUnitFlyHeight(.me) < 1.00 then
                    call SetUnitX(.me, GetUnitX(.me) + .velocity.x)
                    call SetUnitY(.me, GetUnitY(.me) + .velocity.y)
                else
                    call SetUnitX(.me, .lastX + .velocity.x)
                    call SetUnitY(.me, .lastY + .velocity.y)
                endif
            endif
            if (not IsPointInRegion(playable, GetUnitX(.me), GetUnitY(.me))) or (not IsTerrainWalkable(GetUnitX(.me), GetUnitY(.me))) then
                call SetUnitPosition(.me, GetUnitX(.me), GetUnitY(.me))
            endif
            set .lastX = GetUnitX(.me)
            set .lastY = GetUnitY(.me)
            set z = GetUnitZ(.me) + .velocity.z
            if z < GetTerrainZ(GetUnitX(.me), GetUnitY(.me)) and .velocity.z < 0.00 then
                call SetUnitFlyHeight(.me, 0.00, 0.00)
                if IsUnitType(me, UNIT_TYPE_PLAYER) and .velocity.z < -PLAYER_BUMP_SFX_THRESHOLD then
                    call Sfx(PLAYER_BUMP_SFX_PATH, GetUnitX(.me), GetUnitY(.me), 0.00, 0.00, 90, 0.7)
                endif
                set .velocity.z = -.velocity.z
                if radius > 0.00 then
                    set .velocity.z = .velocity.z - PLAYER_BUMP_SPEED_LOSS
                    if .velocity.z < 0.00 then
                        set .velocity.z = 0.00
                    endif
                endif
            else
                call SetUnitZ(.me, z)
                if radius > 0.00 and z >= 1.00 then
                    call DisableUnitCollision(me)
                endif
            endif
            if .velocity.getLength() != 0.00 and radius > 0.00 then
                set .dis = this
                call GroupEnumUnitsInRange(enumGroup, GetUnitX(.me), GetUnitY(.me), 80.0, Filter(function thistype.collision))
            endif
        endmethod
       
        implement II32
       
        method setX takes real x returns nothing
            call SetUnitX(me, x)
            set lastX = x
        endmethod
       
        method setY takes real y returns nothing
            call SetUnitY(me, y)
            set lastY = y
        endmethod
       
        method setZ takes real z returns nothing
            call SetUnitZ(me, z)
            set lastZ = z
        endmethod
       
        method applyVector takes Vector v returns nothing
            local real loss = 0.00
            if IsUnitType(me, UNIT_TYPE_PLAYER) then
                set loss = PLAYER_BUMP_SPEED_LOSS
            endif
            call velocity.add(v)
            call BoundaryCheck(me, velocity, loss)
            if start32() then
                set lastX = GetUnitX(me)
                set lastY = GetUnitY(me)
                set lastZ = GetUnitZ(me)
            endif
        endmethod
       
        method setVector takes Vector v returns nothing
            set velocity.x = v.x
            set velocity.y = v.y
            set velocity.z = v.z
        endmethod
       
        method getVector takes nothing returns Vector
            return velocity
        endmethod
       
        /*method exertForce takes Vector f returns nothing
            local real l = f.getLength()
            call f.setLength(f.getLength()/mass)
            call applyVector(f)
            call f.setLength(l)
        endmethod*/
       
        private static method checkEnd takes nothing returns boolean
            local unit f = GetFilterUnit()
            local real x = GetUnitX(f)
            local real y = GetUnitY(f)
           
            if (IsUnitType(f, UNIT_TYPE_PLAYER)) then
                set x = Pow(thistype[f].movementX - x, 2)
                set y = Pow(thistype[f].movementY - y, 2)
                if (SquareRoot(x + y) <= POSITION_RADIUS) then
                    set thistype[f].moving = false
                endif
            endif
            set f = null
            return false
        endmethod
       
        static method isMoving takes nothing returns nothing
            local unit u = GetTriggerUnit()
            local string s = OrderId2String(GetIssuedOrderId())
            local Ball ball = Ball.balls[0]
           
            if IsUnitType(u, UNIT_TYPE_PLAYER) and unitActive[GetPlayerId(GetOwningPlayer(u))] then
                if s == "smart" then
                    set thistype[u].moving = true
                    set thistype[u].movementX = GetOrderPointX()
                    set thistype[u].movementY = GetOrderPointY()
                    call thistype[u].start32()
                else
                    set thistype[u].moving = false
                endif
            endif
            set u = null
        endmethod
       
        static method onInit takes nothing returns nothing
            call RegisterPlayerUnitEvent(EVENT_PLAYER_UNIT_ISSUED_ORDER, function thistype.isMoving)
            call RegisterPlayerUnitEvent(EVENT_PLAYER_UNIT_ISSUED_TARGET_ORDER, function thistype.isMoving)
            call RegisterPlayerUnitEvent(EVENT_PLAYER_UNIT_ISSUED_POINT_ORDER, function thistype.isMoving)
        endmethod
    endstruct

endlibrary

 

[Dr Super Good]

What GUI trigger are you trying to copy? I do not see any in the map provided. The provided map seems to only have vJASS triggers.

EDIT: That trigger is a vJASS library. It is not GUI.

You will need to import all its dependent libraries for it to work.

That trigger may be desync prone since it involves Z of sorts.

 

[Mechanic]

Oh. I mean, JASS. The GIF videos is from this map. I don't know which JASS that makes that slide effects I wanted. That's why I need somebody who know how to make trigger this way without JASS. Okay. I just need someone who knows how to make this slide effect. Maybe I am in wrong forum...

 

[Dr Super Good]

You will need to explain the physics you want with the slide system. There are dozens of ways this could be implemented. For example, should it factor in unit movement speed or not?

 

[Mechanic]

This is why I am showing in the GIF videos. Also, for speed increases, I want it to have maximum speed conditions equal to hero ship's speed sail level, like if the speed sail level on the hero ship is level 4 and that would be 440, and the max speed is 522, then I want the speed increases goes up to 440, for until the max speed sail changes to 490 or 522, and then it goes up to 490, then go up to 522, you know? Also, I want turning the ship to be like this in the GIF videos, and when the ship stops, I want it to be like that in the GIF videos to stop the ship just like in real life. I don't know how to explain out of those GIF videos I made. But, that's what I wanted.

 

[Mechanic]

I found other map called "Drive" that almost works like the way I wanted slide effects to be that shown in those GIF videos above. But, I want it to be works like in those GIF videos with controlling from mouse, not keyboard, you know. Here the map file I uploaded and also all the triggers out of this map are shown below.

• Ini
  • Events
    • Map initialization
  • Conditions
  • Actions
    • Game - Display to (All players) for 0.00 seconds the text: Press 'Esc' to chan...
    • Visibility - Disable fog of war
    • Visibility - Disable black mask
    • Set VariableSet zLoc = (Point(0.00, 0.00))
    • Item - Create Cheese at zLoc
    • Set VariableSet pitem = (Last created item)
    • Set VariableSet minX = (Min X of (Playable map area))
    • Set VariableSet maxX = (Max X of (Playable map area))
    • Set VariableSet minY = (Min Y of (Playable map area))
    • Set VariableSet maxY = (Max Y of (Playable map area))
    • For each (Integer i) from 1 to 12, do (Actions)
      • Loop - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • ((Player(i)) slot status) Equal to Is playing
          • Then - Actions
            • -------- Speed will be increased by this value per timestep --------
            • Set VariableSet acceleration[i] = 0.50
            • -------- A small ammount of speed will be lost every timestep --------
            • Set VariableSet friction[i] = (985.00 / 1000.00)
            • -------- Turn 5 degrees per timestep --------
            • Set VariableSet turnRate[i] = 1.00
            • Unit - Create 1 Siege Engine for (Player(i)) at zLoc facing (Random angle) degrees
            • Set VariableSet driver[i] = (Last created unit)
            • Set VariableSet angle[i] = (Facing of driver[i])
            • Set VariableSet forwards[i] = False
            • Set VariableSet backwards[i] = False
            • Set VariableSet left[i] = False
            • Set VariableSet right[i] = False
            • Set VariableSet camMode[i] = 1
            • Camera - Lock camera target for (Player(i)) to driver[i], offset by (0.00, 0.00) using The unit's rotation
            • Trigger - Add to ForwardsPress <gen> the event (Player - (Player(i)) Presses the Up Arrow key)
            • Trigger - Add to BackwardsPress <gen> the event (Player - (Player(i)) Presses the Down Arrow key)
            • Trigger - Add to LeftPress <gen> the event (Player - (Player(i)) Presses the Left Arrow key)
            • Trigger - Add to RightPress <gen> the event (Player - (Player(i)) Presses the Right Arrow key)
            • Trigger - Add to ForwardsRelease <gen> the event (Player - (Player(i)) Releases the Up Arrow key)
            • Trigger - Add to BackwardsRelease <gen> the event (Player - (Player(i)) Releases the Down Arrow key)
            • Trigger - Add to LeftRelease <gen> the event (Player - (Player(i)) Releases the Left Arrow key)
            • Trigger - Add to RightRelease <gen> the event (Player - (Player(i)) Releases the Right Arrow key)
            • Trigger - Add to ChangeCam <gen> the event (Player - (Player(i)) skips a cinematic sequence)
          • Else - Actions

• Loop
  • Events
    • Time - Every 0.03 seconds of game time
  • Conditions
  • Actions
    • For each (Integer i) from 1 to 12, do (Actions)
      • Loop - Actions
        • Set VariableSet u = driver[i]
        • Unit - Make u face angle[i] over 0.00 seconds
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • forwards[i] Equal to True
          • Then - Actions
            • Set VariableSet speedX[i] = (speedX[i] + (acceleration[i] x (Cos(angle[i]))))
            • Set VariableSet speedY[i] = (speedY[i] + (acceleration[i] x (Sin(angle[i]))))
          • Else - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • backwards[i] Equal to True
          • Then - Actions
            • Set VariableSet speedX[i] = (speedX[i] - (acceleration[i] x (Cos(angle[i]))))
            • Set VariableSet speedY[i] = (speedY[i] - (acceleration[i] x (Sin(angle[i]))))
          • Else - Actions
        • If (left[i] Equal to True) then do (Set VariableSet angle[i] = (angle[i] + turnRate[i])) else do (-------- Do Nothing --------)
        • If (right[i] Equal to True) then do (Set VariableSet angle[i] = (angle[i] - turnRate[i])) else do (-------- Do Nothing --------)
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • camMode[i] Equal to 0
          • Then - Actions
            • Camera - Set (Player(i))'s camera Rotation to angle[i] over 0.00 seconds
          • Else - Actions
        • Custom script: set udg_x = GetUnitX(udg_u)
        • Custom script: set udg_y = GetUnitY(udg_u)
        • Set VariableSet speedX[i] = (speedX[i] x friction[i])
        • Set VariableSet speedY[i] = (speedY[i] x friction[i])
        • Set VariableSet x = (x + speedX[i])
        • Set VariableSet y = (y + speedY[i])
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • x Less than maxX
            • x Greater than minX
            • y Less than maxY
            • y Greater than minY
          • Then - Actions
            • Custom script: call SetItemPosition(udg_pitem, udg_x, udg_y)
            • Custom script: call SetItemVisible(udg_pitem, false)
            • Custom script: if RAbsBJ(udg_x - GetWidgetX(udg_pitem) + udg_y - GetWidgetY(udg_pitem)) <= 10.0 then
            • Custom script: call SetUnitX(udg_u, udg_x)
            • Custom script: call SetUnitY(udg_u, udg_y)
            • Custom script: else
            • Set VariableSet speedX[i] = 0.00
            • Set VariableSet speedY[i] = 0.00
            • Custom script: endif
          • Else - Actions
            • Set VariableSet speedX[i] = 0.00
            • Set VariableSet speedY[i] = 0.00

• ChangeCam
  • Events
  • Conditions
  • Actions
    • Set VariableSet i = (Player number of (Triggering player))
    • Set VariableSet camMode[i] = ((camMode[i] + 1) mod 3)
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • camMode[i] Equal to 0
      • Then - Actions
        • Camera - Lock camera target for (Player(i)) to driver[i], offset by (0.00, 0.00) using The unit's rotation
        • Camera - Set (Player(i))'s camera Angle of attack to 350.00 over 0.00 seconds
        • Camera - Set (Player(i))'s camera Distance to target to 330.00 over 0.00 seconds
        • Camera - Set (Player(i))'s camera Height Offset to 100.00 over 0.00 seconds
      • Else - Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • camMode[i] Equal to 1
      • Then - Actions
        • Camera - Reset camera for (Triggering player) to standard game-view over 0.00 seconds
        • Camera - Lock camera target for (Player(i)) to driver[i], offset by (0.00, 0.00) using The unit's rotation
      • Else - Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • camMode[i] Equal to 2
      • Then - Actions
        • Camera - Reset camera for (Triggering player) to standard game-view over 0.00 seconds
      • Else - Actions
    • Custom script: call DisplayTimedTextToPlayer(GetTriggerPlayer(), 0, 0, 60, "Cam mode: " + I2S(udg_camMode[udg_i]))

ForwardsPress
Events
Conditions
Actions
Set VariableSet forwards[(Player number of (Triggering player))] = True
[/trigger]

• ForwardsRelease
  • Events
  • Conditions
  • Actions
    • Set VariableSet forwards[(Player number of (Triggering player))] = False

• BackwardsPress
  • Events
  • Conditions
  • Actions
    • Set VariableSet backwards[(Player number of (Triggering player))] = True

• BackwardsRelease
  • Events
  • Conditions
  • Actions
    • Set VariableSet backwards[(Player number of (Triggering player))] = False

• LeftPress
  • Events
  • Conditions
  • Actions
    • Set VariableSet left[(Player number of (Triggering player))] = True

• LeftRelease
  • Events
  • Conditions
  • Actions
    • Set VariableSet left[(Player number of (Triggering player))] = False

• RightPress
  • Events
  • Conditions
  • Actions
    • Set VariableSet right[(Player number of (Triggering player))] = True

• RightRelease
  • Events
  • Conditions
  • Actions
    • Set VariableSet right[(Player number of (Triggering player))] = False

 

[Mechanic]

@Dr Super Good
I found the perfect map I am looking for that match the water slide effect I needed! Here the link of the map I just found: RigidBody Physics v1.3. But, just two problems are... I want the speed to be increasing slow up to the maximum speed of ship's max speed, you know? And, I want the slide effect system to be work with the water terrain, not the ice texture.


And, also for this slide trigger, I want it to be with the speed maximum to be broken from the speed trigger called "MoveSpeedX." Speed limit broken like this.

 

[Dr Super Good]

This is why I am showing in the GIF videos. Also, for speed increases, I want it to have maximum speed conditions equal to hero ship's speed sail level, like if the speed sail level on the hero ship is level 4 and that would be 440, and the max speed is 522, then I want the speed increases goes up to 440, for until the max speed sail changes to 490 or 522, and then it goes up to 490, then go up to 522, you know?

And, also for this slide trigger, I want it to be with the speed maximum to be broken from the speed trigger called "MoveSpeedX." Speed limit broken like this.

These two requests are contradictory.

If it is faster than maximum movement speed how is it meant to know what the maximum movement speed should be? Or do you want it to have a maximum of some multiple of the base movement speed? Or is it an ability with some table of maximum speed values?

 

[Mechanic]

The ship will have 6 levels of speed engine.

 

[Dr Super Good]

The ship will have 6 levels of speed engine.

Which does what? In your previous description of the ability you did not make it clear that the ability enables the slide or not, or that it exceeds the normal speed limit or not. Does the ability allow ships to slide, or does it just improve how they slide?

Currently if I was to try and code something for you chances are it will not be what you want because I am not too sure what you want.

 

[Mechanic]

All good! I figured it out! I was frustrated, but now I am relieved. I got all fixed now. Here the link below that I had it all worked out so far with Stry.

Help with Editing Abyss tile