Computer Science Canada Platformer Help. |
| Author: | Hijoxizmo [ Wed Oct 28, 2009 12:53 pm ] | ||
| Post subject: | Platformer Help. | ||
What is it you are trying to achieve? I am trying to make a platform game. What is the problem you are having? My character will not jump onto the platform, also it snaps onto the platform. Describe what you have tried to solve this problem I have tried different if statements, but I can't get anything to work. Post any relevant code (You may choose to attach the file instead of posting the code if it is too long) <Answer Here>
Please specify what version of Turing you are using 4.1 for windows |
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| Author: | DemonWasp [ Wed Oct 28, 2009 1:19 pm ] |
| Post subject: | RE:Platformer Help. |
If you look carefully at the code for detecting when a player is on the platform, you'll find that the code for "snapping" him onto the platform runs whenever he's above the platform, no matter how far above (you detect that he's above, but not by how much). I would suggest the following: A player snaps to a platform whenever: - They are at the platform's X location (done!) - They are currently above the platform (done!) - They would go below the platform on this turn (todo) |
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| Author: | Hijoxizmo [ Thu Oct 29, 2009 11:59 am ] |
| Post subject: | Re: Platformer Help. |
Update: I have fixed it. You can jump onto the platform and you will not snap onto it. Although the player cannot go underneath the platform. It acts like a hill. To see what I am talking about use the right arrow key to try and go underneath the platform. You sail right over top. Go back using the left arrow key and the same thing happens. New Code: % To create a platform game % Written By: Matt McMurray % Date: Oct. 19, 2009 % Constants const GROUND_HEIGHT := 5 const GROUND_TOP := 50 const LEFT_WALL := 11 const RIGHT_WALL := 628 const RUN_SPEED := 10 const JUMP_SPEED := 30 var GRAVITY := 2 const PLATFORM_1H := 50 const PLATFORM_1L := 250 const PLATFORM_1R := 400 % Window and Graphics var win := Window.Open ("graphics:640;480,offscreenonly") var chars : array char of boolean % player position and velocity var posx, posy, posmx, posmy : int var velx, vely : real posx := 20 velx := 0 posy := 400 vely := 0 posmx := 400 posmy := 50 loop Input.KeyDown (chars) if chars ('q') then exit % Trying to pause the game elsif chars ('p') then pause (10000) end if % Movement if chars (KEY_LEFT_ARROW) then velx := -RUN_SPEED elsif chars (KEY_RIGHT_ARROW) then velx := RUN_SPEED else velx := 0 end if if chars (KEY_UP_ARROW) and posy = GROUND_HEIGHT then vely := JUMP_SPEED elsif chars (KEY_UP_ARROW) and posy = PLATFORM_1H and posx > PLATFORM_1L and posx < PLATFORM_1R then vely := JUMP_SPEED end if % Gravity vely -= GRAVITY posx += round (velx) posy += round (vely) % Collision if posy < GROUND_HEIGHT then posy := GROUND_HEIGHT vely := 0 end if if posx > RIGHT_WALL - 21 then posx := RIGHT_WALL - 21 velx := 0 end if if posx < LEFT_WALL then posx := LEFT_WALL velx := 0 end if if posy < PLATFORM_1H and posx > PLATFORM_1L - 20 and posx < PLATFORM_1R then posy := PLATFORM_1H vely := 0 velx := 0 GRAVITY := 2 end if % trying to go under platform if posy = GROUND_HEIGHT and posx > PLATFORM_1L - 20 and posx < PLATFORM_1R then posy := GROUND_HEIGHT vely := 0 velx := 0 GRAVITY := 2 end if %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Character drawfillbox (posx - 0, posy, posx + 20, posy + 25, white) % Background colourback (black) % Platforms Draw.Line (PLATFORM_1L, PLATFORM_1H, PLATFORM_1R, PLATFORM_1H, white) % Walls Draw.Line (LEFT_WALL, GROUND_HEIGHT, LEFT_WALL, maxy, white) Draw.Line (RIGHT_WALL, GROUND_HEIGHT, RIGHT_WALL, maxy, white) % Bottom line Draw.Line (LEFT_WALL, GROUND_HEIGHT, RIGHT_WALL, GROUND_HEIGHT, white) View.Update delay (15) cls end loop |
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| Author: | TheGuardian001 [ Thu Oct 29, 2009 10:33 pm ] |
| Post subject: | Re: Platformer Help. |
Hijoxizmo @ Thu Oct 29, 2009 11:59 am wrote: if posy < PLATFORM_1H and posx > PLATFORM_1L - 20 and posx < PLATFORM_1R then posy := PLATFORM_1H vely := 0 velx := 0 GRAVITY := 2 end if In english: if player is below platform and player between platform sides move player onto platform no more velocity gravity = 2 end if you are using < to check if the player is below the platform, then, if they are below it, moving them onto the platform. You want to be checking if they are above the platform, or rather if they are actually on the platform/within a certain range of the platform. There was nothing wrong with the original check to see if they were should land on the platform, the only problem was that you were checking for everything below the platform's height. You just need to be more specific about where the platform is. It currently takes up everything from the white line down, when it should take up only the white line. |
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| Author: | Hijoxizmo [ Fri Oct 30, 2009 11:51 am ] |
| Post subject: | RE:Platformer Help. |
Would anyone mind writing some code for me? |
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| Author: | Leakime [ Fri Oct 30, 2009 6:51 pm ] |
| Post subject: | RE:Platformer Help. |
Hey I'm Hijoxizmo's partner and I figured it out. Thanks for the advice TheGuardian001! |
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