Trying to make a parabolic jump trail for characters mario-like game :(

[blackheart5598]

What is it you are trying to achieve?
I am trying to make a parabolic jump trail for my characters so that they don't all jump in the same way and height which makes it look awkward.


What is the problem you are having?
I am unable to do what I said above


Describe what you have tried to solve this problem
I have tried using a parabolic formula of y=x**2 but that doesn't seem to work.


Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)
here is my jump procedure, if it is not enough i don't ming giving more information about my game. Thanks in advance

Turing:

procedure jump     for count : 1 .. 180 by 5         Input.KeyDown (chars)         if chars ('d') then             d := d + 25             if (100 + d) >= 300 then                 picx := picx - 10             end if         end if         if chars ('a') then             d := d - 25         end if         if ((70 + d) <= 0) then             d := 0         end if         if ((160 + d) >= maxx) then             d := 1140         end if         w := 0         w += 150 * (sind (count))         Draw.FillOval (100 + d, 200 + round (w), 30, 40, 68)         Draw.FillBox (72 + d, 240 + round (w), 160 + d, 230 + round (w), red)         Draw.FillArc (102 + d, 240 + round (w), 30, 30, 0, 180, brightred)         Draw.FillOval (87 + d, 210 + round (w), 5, 5, black)         Draw.FillOval (115 + d, 210 + round (w), 5, 5, black)         Draw.FillArc (105 + d, 190 + round (w), 10, 10, 0, 20, black)         Draw.FillArc (100 + d, 190 + round (w), 10, 10, 160, 180, black)         Draw.FillArc (105 + d, 175 + round (w), 15, 15, -30, 30, black)         Draw.FillBox (70 + d, 90 + round (w), 130 + d, 160 + round (w), brightred)         Draw.FillArc (105 + d, 160 + round (w), 25, 25, 0, 25, red)         Draw.FillArc (95 + d, 160 + round (w), 25, 25, 155, 180, red)         Draw.Line (70 + d, 90 + round (w), 70 + d, 30 + round (w), black)         Draw.Line (100 + d, 90 + round (w), 100 + d, 30 + round (w), black)         Draw.Line (101 + d, 90 + round (w), 101 + d, 30 + round (w), black)         Draw.Line (130 + d, 90 + round (w), 130 + d, 30 + round (w), black)         Draw.FillOval (60 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-40 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-140 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-240 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-340 + d, 50 + round (w), 20, 20, 68)         Draw.FillBox (40 + d, 70 + round (w), 100 + d, 80 + round (w), red)         Draw.FillBox (-60 + d, 70 + round (w), 0 + d, 80 + round (w), red)         Draw.FillBox (-160 + d, 70 + round (w), -100 + d, 80 + round (w), red)         Draw.FillBox (-260 + d, 70 + round (w), -200 + d, 80 + round (w), red)         Draw.FillBox (-360 + d, 70 + round (w), -300 + d, 80 + round (w), red)         View.Update         delay (25)         Draw.FillOval (100 + d, 200 + round (w), 30, 40, colorbg)         Draw.FillBox (72 + d, 240 + round (w), 160 + d, 230 + round (w), colorbg)         Draw.FillArc (102 + d, 240 + round (w), 30, 30, 0, 180, colorbg)         Draw.FillOval (87 + d, 210 + round (w), 5, 5, colorbg)         Draw.FillOval (115 + d, 210 + round (w), 5, 5, colorbg)         Draw.FillArc (105 + d, 190 + round (w), 10, 10, 0, 20, colorbg)         Draw.FillArc (100 + d, 190 + round (w), 10, 10, 160, 180, colorbg)         Draw.FillArc (105 + d, 175 + round (w), 15, 15, -30, 30, colorbg)         Draw.FillBox (70 + d, 90 + round (w), 130 + d, 160 + round (w), colorbg)         Draw.FillArc (105 + d, 160 + round (w), 25, 25, 0, 25, colorbg)         Draw.FillArc (95 + d, 160 + round (w), 25, 25, 155, 180, colorbg)         Draw.Line (70 + d, 90 + round (w), 70 + d, 30 + round (w), colorbg)         Draw.Line (100 + d, 90 + round (w), 100 + d, 30 + round (w), colorbg)         Draw.Line (101 + d, 90 + round (w), 101 + d, 30 + round (w), colorbg)         Draw.Line (130 + d, 90 + round (w), 130 + d, 30 + round (w), colorbg)         Draw.FillOval (60 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-40 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-140 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-240 + d, 50 + round (w), 20, 20, 68)         Draw.FillOval (-340 + d, 50 + round (w), 20, 20, 68)         Draw.FillBox (40 + d, 70 + round (w), 100 + d, 80 + round (w), red)         Draw.FillBox (-60 + d, 70 + round (w), 0 + d, 80 + round (w), red)         Draw.FillBox (-160 + d, 70 + round (w), -100 + d, 80 + round (w), red)         Draw.FillBox (-260 + d, 70 + round (w), -200 + d, 80 + round (w), red)         Draw.FillBox (-360 + d, 70 + round (w), -300 + d, 80 + round (w), red)         if (100 + d) >= 700 then             picx := picx - 5         end if         if picx <= -2000 then             picx := 0         end if         Pic.Draw (backgroundlevel1, picx, 0, picCopy)     end for end jump

Please specify what version of Turing you are using
latest version

[keyboardwalker]

This may give you the desired effect and there isn't any exponentiation.

Turing:

const EARTHSGRAVITY := 9.80665 var ballXLoc, ballYLoc : real var xVelocity, yVelocity : real ballXLoc := 15 ballYLoc := 15 %Inceasing the xVelocity will change how far to the right the ball will go. xVelocity := 30 %Inceasing the yVelocity will change how high the ball will go. yVelocity := 70 loop     drawfilloval (round (ballXLoc), round (ballYLoc), 5, 5, red)     drawline (round (ballXLoc), round (ballYLoc), round (ballXLoc + xVelocity), round (ballYLoc + yVelocity), red)     delay (50)     %Moving the ball's location     ballXLoc := ballXLoc + xVelocity     ballYLoc := ballYLoc + yVelocity     %Applying the force of gravity to the vertical component of the ball's velocity.     yVelocity -= EARTHSGRAVITY %usually you would * mass but it's unecessary in this case.     exit when ballXLoc < 0 or ballYLoc < 0 end loop

[evildaddy911]

youre looking at this wrong. its actually quite simple. here some psuedocode:

code:

y : real % the current height of the character y_vel : real % how many units to move the character each time y_velocity = 5 loop     if y > ground         y = y + y_velocity % move the character upwards 'y_vel'         y_velocity = y_vel - 0.5 % decrement y_vel by a constant     else     y_vel = 0 % set y_vel to zero end loop

EDIT: it seems somebody beat me to the punch...

[Raknarg]

As the others have suggested, think about how gravity works in real life. It doesn't matter what your horizontal direction is, that will stay constant. However, what happens when you jump? You move upwards at a certain initial speed, and then the earth is pulling you down at a constant rate.

Try converting that into code.

If the player jumps, set the y direction speed up.

While the player is in the air (think about what that means in terms of x and y), constantly pull him towards the ground.

@keyboardwalker & evildaddy giving a new person in programming a bunch of code to help him out is giving him a fish instead of teaching him how o fish.