Running "if" commands at the same time instead of one after another

ID:2310789
 
Oct 31 2017, 11:58 pm
(See the best response by Ter13.)
Code:
if(instructx)
                        //checks if the x movement is positive (EAST)
                        if(instructx>0)
                            if(movement_x+movement_accel>movement_limit)movement_x=movement_max
                            else movement_x+=movement_accel
                        //checks if the x movement is negative (WEST)
                        if(instructx<0)
                            if(movement_x-movement_accel<-movement_limit)movement_x=-movement_max
                            else movement_x-=movement_accel
                    //checks if there is a movement_x to decelerate
                    else if(movement_x)
                        if(movement_x>0)
                            if(movement_x-movement_decel<0)movement_x=0
                            else movement_x-=movement_decel
                        if(movement_x<0)
                            if(movement_x+movement_decel>0)movement_x=0
                            else movement_x+=movement_decel
                    //checks if a constant y movement is being carried out
                    if(instructy)
                        //checks if the y movement is positive (NORTH)
                        if(instructy>0)
                            if(movement_y+movement_accel>movement_limit)movement_y=movement_max
                            else movement_y+=movement_accel
                        //checks if the y movement is negative (SOUTH)
                        if(instructy<0)
                            if(movement_y-movement_accel<-movement_limit)movement_y=-movement_max
                            else movement_y-=movement_accel
                    //checks if there is a movement_y to decelerate
                    else if(movement_y)
                        if(movement_y>0)
                            if(movement_y-movement_decel<0)movement_y=0
                            else movement_y-=movement_decel
                        if(movement_y<0)
                            if(movement_y+movement_decel>0)movement_y=0
                            else movement_y+=movement_decel


Problem description:

How can i make the if(instructx) and if(instructy) run at the same time instead of one after another?
Nov 1 2017, 12:27 am (Edited on Nov 1 2017, 12:34 am)
Best response
You can't. It sounds like you just need to rearrange your logic.

#define clamp(v,l,h) min(max(v, l), h)



var/accel_x = 0, accel_y = 0

if(movement_x > 0)
    movement_x -= min(movement_x, movement_decel)
else if(movement_x < 0)
    movement_x += min(-movement_x, movement_decel)
if(movement_y > 0)
    movement_y -= min(movement_y, movement_decel)
else if(movement_y < 0)
    movement_y += min(-movement_y, movement_decel)

if(instructx > 0)
    accel_x = movement_accel
else if(instructx < 0)
    accel_x = -movement_accel
if(instructy > 0)
    accel_y = movement_accel
else if(instructy < 0)
    accel_y = -movement_accel

movement_x = clamp(movement_x + accel_x, -movement_limit, movement_limit)
movement_y = clamp(movement_y + accel_y, -movement_limit, movement_limit)
Nov 2 2017, 2:20 pm
Oh, ok. Understood. Thank you Ter!