Platform Jumping Help

[evildaddy911]

What is it you are trying to achieve?
simple platform jumping game

What is the problem you are having?
the character sinks into the platforms and sometimes goes through them

Describe what you have tried to solve this problem
altering the whatdotcpolor for loops to predict when the character will make contact:

Turing:

for i : x - 3  .. x + 3                        %checks if you are in contact with gray walls         for j : y - 3+ yv .. y + 3             if whatdotcolor (i, j) = grey then                 move := false                 yv := 0             elsif whatdotcolor (i, j) not= grey then                 move := true             end if         end for     end for

insted of

Turing:

for j : y - 3 .. y + 3

Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)

Turing:

if move = true then                                     %for parabolic jumping         yv := yv - 1     end if drawfillbox(x-3,y-3,x+3,y+3,black)              %draws character

Please specify what version of Turing you are using
4.1.1.0

[Zren]

Your relative coordinate in your for loop seems to be a bit off.

for j : y - 3 + yv .. y + 3

y := 5
yv := 10

for j : 5 - 3 + 10 .. 5 + 3
for j : 12 .. 8

I'm also going to assume there is no change in position over the x plane.

~

Also, what happens when the pixel (i, -3) is grey, but (i, -2) isn't grey?

Turing:

for j : -3 .. 3             if whatdotcolor (i, j) = grey then                 move := false                 yv := 0             elsif whatdotcolor (i, j) not= grey then                 move := true             end if         end for

[evildaddy911]

do you mean (i,y-3)?
also, i took out the i forloop and just used

code:

whatdotcolor(x,j)

then i put in another whatdotcolor forloop for the lateral movement:

Turing:

if whatdotcolor (x, y) not= gray then         if chars ('a') and x > 29 then                      %moving left/right             x := x - 1         elsif chars ('d') and x < (maxx - 29) then             x := x + 1         end if     elsif whatdotcolor (x + 1, y) = gray then         x := x - 1     elsif whatdotcolor (x - 1, y) = gray then         x := x + 1     end if

[Zren]

I purposely put the range from -3 .. 3 in the for loop I copied from you. This was to simplify the thought process.

Bascially, -3 would be gray, and thus:
move = false
vy = 0

but then you keep running though the loop, and since -2 is not gray:
move = true.

But wait? vy = 0 so nothing should be happening right? Well, at least until you hit your 'gravity code', which does vy -= 1 when move is true.

~

Basically you were doing:
y + vy - (width/2) .. y + (width/2)

Your right side was missing the displacement of moving that frame (velocity_y). So the upper limit could be skimping on some areas to check. Or in the case I mentioned, not check at all.

~

You were on the right track before. You were (trying to) calculating collision detection on where you'd end up before moving.

dx = obj.x + obj.velocity_x
dy = obj.y + obj.velocity_y

Check collision on (dx,dy). If no collision -> move obj.

Your player should never end up in a wall to begin with, thus you shouldn't need to worry about 'pushing' him out of the wall.

~

Also, by removing that for loop (I'm assuming as I don't have your updated code), you're now only checking collision (above? and) below the box's (x,y). Essentially your collision detection is for a line now. So the box will overlay over your walls possibly.