Light Reflection

11-17-2009, 11:32 PM

Hey I just started experimenting with VJASS, I used to use complete JASS and thought the change would be good. I thought it would be a good idea to create a spell to practice it.
So the spell I currently created is sort of like the light reflection from Legend of Zelda: Ocarina of Time. When a footman uses defend (Just temporary spell name) and is in a light source the light should reflect off in the direction he is facing. Your allies then can step in his reflected light and use defend to reflect it in a different direction.

I thought about just for now creating 5 light units. If your ally steps in unit 3, units 4 and 5 would be gone because he is blocking the light and it is reflecting in new position.

Example:

O = light
X = ally
U = You

U O O O O O

U O O X
O
O
O
O
O

All I'm asking for is for some ideas on how to do it, not someone to do it for me. I will show my structs and would really appreciate any criticism and help.

JASS:

struct AllBeams
    timer t = CreateTimer()
    
    private method GetDistance takes real x, real x2, real y, real y2 returns real  //Anti bj
        local real dx = x2 - x
        local real dy = y2 - y
        return SquareRoot(dx * dx + dy * dy)
    endmethod
    
    private method StartBeamTimer takes nothing returns nothing     //Start the Timer for checking distance
    endmethod
    
    private method DestroyBeamTimer takes nothing returns nothing   //Destroy the Timer for checking distance
    endmethod
    
    private method CheckAllBeams takes nothing returns nothing      //Run through each struct and check distance using ForGroup
    endmethod
endstruct

JASS:

struct LightBeam
    integer numBeams = 5
    integer owner = -1
    boolean array hidden[5]
    unit array beams[5]
    
    private method Init takes integer owner returns nothing    //Creates beams for player
        local integer i = 0
            set this.owner = owner
            loop
                if(i == 0) then
                    call this.CreateBeam(5, 5, 75, 90, i)
                else
                    call this.CreateBeam(GetUnitX(this.beams[i]), GetUnitY(this.beams[i]), 75, 90, i)
                endif
                set i = i + 1
                exitwhen i > this.numBeams - 1
            endloop
    endmethod
    
    private method CreateBeam takes real x, real y, real dist, real angle, int i returns nothing
        set x = x + dist * Cos(angle * bj_DEGTORAD)
        set y = y + dist * Sin(angle * bj_DEGTORAD)
        
        set this.beams[i] = CreateUnit(Player(PLAYER_NEUTRAL_PASSIVE), 'hfoo', x, y, 270)
    endmethod
    
    private method DestroyBeams takes nothing returns nothing   //Destroys beams for player
        local integer i = 1
            loop
                call KillUnit(this.beams[i])
                set this.beams[i] = null
                set i = i + 1
                exitwhen i > this.numBeams
            endloop
    endmethod
    
    private method HideBeam takes integer i returns nothing     //Hide the beam
        call ShowUnit(this.beams[i], false)
    endmethod
    
    private method ShowBeam takes integer i returns nothing     //Shows the beam
        call ShowUnit(this.beams[i], false)
    endmethod
    
    private method CheckDistance takes nothing returns nothing      //Checks distnace of beams
        local unit u = GetEnumUnit()
        
        if(this.GetDistance(GetUnitX(this.beams[0]), GetUnitX(u), GetUnitY(this.beams[0]), GetUnitY(u)) < 75) then
            if(this.hidden[0] == false) then
                set this.hidden[1] = true
                set this.hidden[2] = true
                set this.hidden[3] = true
                set this.hidden[4] = true
                
                call this.HideBeam(1)
                call this.HideBeam(2)
                call this.HideBeam(3)
                call this.HideBeam(4)
            endif
        elseif(this.GetDistance(GetUnitX(this.beams[1]), GetUnitX(u), GetUnitY(this.beams[1]), GetUnitY(u)) < 75) then
            if(this.hidden[0] == false and this.hidden[1] == false) then
                set this.hidden[2] = true
                set this.hidden[3] = true
                set this.hidden[4] = true
                
                call this.HideBeam(2)
                call this.HideBeam(3)
                call this.HideBeam(4)
            endif
        elseif(this.GetDistance(GetUnitX(this.beams[2]), GetUnitX(u), GetUnitY(this.beams[2]), GetUnitY(u)) < 75) then
            if(this.hidden[0] == false and this.hidden[1] == false and this.hidden[2] == false) then
                set this.hidden[3] = true
                set this.hidden[4] = true
                
                call this.HideBeam(3)
                call this.HideBeam(4)
            endif
        elseif(this.GetDistance(GetUnitX(this.beams[3]), GetUnitX(u), GetUnitY(this.beams[3]), GetUnitY(u)) < 75) then
            if(this.hidden[0] == false and this.hidden[1] == false and this.hidden[2] == false and this.hidden[3] == false) then
                set this.hidden[4] = true
                
                call this.HideBeam(4)
            endif
        elseif(this.GetDistance(GetUnitX(this.beams[4]), GetUnitX(u), GetUnitY(this.beams[4]), GetUnitY(u)) < 75) then
            if(this.hidden[0] == false and this.hidden[1] == false and this.hidden[2] == false and this.hidden[3] == false and this.hidden[4] == false) then
            
            endif
        endif
    endmethod
endstruct