Platforms

[TopBypass]

Alright i have managed to get my character to jump but now i need him to jump of a platform. How do i go about creating a solid object in my code?

[TokenHerbz]

detection. there are serveral ways, the easier methods would be to use whatdotcolor.

otherwise you can specifically make the detection coding youself, but maybe try whatdotcolor first.

[TopBypass]

thanks soo much ill try it now and see if it works!

[TopBypass]

hmm i dont really see how this would help me... Im using the code from the tutorial " How to jump"

[TokenHerbz]

Oh, well after looking threw his code, It's not a good code to start using for a platform jumping type of program. As you can test yourself changing his constant variable ground_height changes the line which the box is on.

The idea is great but since you are aiming for different ground heights on your game, this wont work unless you overhauled his code, and its always better to start your code from scratch.

[TopBypass]

Alright thanks for the advice ill take a diff aproach to the game. Thanks again! ( +Karma )

[BigBear]

I do not believe that code needs to be overhauled. Just needs a few more constants and if statements.

First you need to draw a platform so a rectangle using drawfillbox (x1, y1, x2, y2, colour). Then just follow his examples and create if statements. Please follow my comments and compare my version of this program to the original which I would like to thank Mazer.

There is another thread trying to do the same thing and also didn't credit Mazer.

Turing:

% some constants, tweak this to your liking const GROUND_HEIGHT := 120 const RUN_SPEED := 10 const JUMP_SPEED := 30 const GRAVITY := 2 %four new constants controlling where your platform is const BOX_x1 := 170 const BOX_y1 := 170 const BOX_x2 := 300 const BOX_y2 := 200 %end of my revisions var win := Window.Open ("graphics:640;480,offscreenonly") var chars : array char of boolean % player position and velocity var posx, posy : int var velx, vely : real posx := 20 velx := 0 posy := 400 vely := 0 loop     Input.KeyDown (chars)     if chars ('q') then         exit     end if     % to make the player move     if chars (KEY_LEFT_ARROW) then         velx := -RUN_SPEED     elsif chars (KEY_RIGHT_ARROW) then         velx := RUN_SPEED     else         velx := 0     end if     % remember, in order to jump you MUST be on the ground when pressing UP     if chars (KEY_UP_ARROW) and posy = GROUND_HEIGHT then         vely := JUMP_SPEED     end if     %again follow the ubove if statement if the movable box is on the ground then so make it the platform to allow jumping from platform     if chars (KEY_UP_ARROW) and posy = BOX_y2 and posx > BOX_x1 and posx < BOX_x2 then         vely := JUMP_SPEED     end if     %end of my revisions     % subtract your "gravity" constant from the velocity EACH frame     vely -= GRAVITY     posx += round (velx)     posy += round (vely)     % simple "collision" check. just makes sure the player stays above ground     if posy < GROUND_HEIGHT then         posy := GROUND_HEIGHT         vely := 0     end if     %so if movable box isn't on the ground and he is in between box then set his y position to the height of the platform     if posy not= GROUND_HEIGHT and posy < BOX_y2 and posx + 10 > BOX_x1 and posx < BOX_x2 then         posy := BOX_y2         vely := 0     end if     %end of my revisions     % different colours just to illustrate whether or not you may jump     if posy = GROUND_HEIGHT then         drawfillbox (posx - 10, posy, posx + 10, posy + 20, green)         %or he is on the platform change colours     elsif posy = BOX_y2 then         drawfillbox (posx - 10, posy, posx + 10, posy + 20, green)         %end of my revisions     else         drawfillbox (posx - 10, posy, posx + 10, posy + 20, red)     end if     %draw the platform     drawfillbox (BOX_x1, BOX_y1, BOX_x2, BOX_y2, 5)     %end of my revisions     drawline (0, GROUND_HEIGHT, maxx, GROUND_HEIGHT, blue)     View.Update     delay (25)     cls end loop

[Sean]

BigBear, once again you are not to give them the code, but are to instruct them.

And you over-comment

What you want to do, is make your boxes, they could be variables, or constants like mentioned above. After doing so, you want to compare these variables with your character position, and have the character stay between the length of the platform, and along the top of the platform.