MKLIUKANG1
Active member
Positioned the menu navigation buttons
In Progress Double Dragon Mini
- Thread starter MKLIUKANG1
- Start date
The project is currently under development.
Positioned the menu navigation buttons
MKLIUKANG1
Active member
Ladder System for OpenBOR
Standard OpenBOR lacks built-in support for climbing ladders like in classic beat 'em ups. However, using scripts, you can implement a fully functional mechanic that allows the player to grab onto a ladder, move up/down (and even left/right), as well as jump off at any moment.
I have developed a compact, ready-to-use ladder system that:
System Architecture
Ladder Parameter Storage
All ladder parameters are stored in global variables. For each ladder, the system saves its center coordinates (x, y, z), grab zone width (w), height (h), and type (type). The default maximum limit is 5, but more can be easily added.
Core Functions
add_ladder(x, y, z, w, h, type) – adds a ladder to the list.
init_ladders() – reads the level's global variables (ladder_count, ladder0_x, …) and populates the internal list.
set_current_ladder(idx) – fills helper variables (cur_lx, cur_ly, ...) with the parameters of the ladder at index idx. This approach is used specifically to avoid pointers.
process_ladders() – the main function that must be called inside the level block within update.c. It processes all players (0 and 1), checks if they are within a ladder zone, and handles grabbing, movement, and releasing.
How the Processing Works
When the level changes (current_level is not equal to the previous one), init_ladders() is called to load parameters from global variables.
Example for a single vertical ladder:
Parameters:
Anyway, there is still a lot of work to be done on it.
I have developed a compact, ready-to-use ladder system that:
- Works without pointers and the & operator — fully compatible with OpenBOR.
- Supports up to 5 ladders per level (can be easily expanded).
- Features two ladder types: vertical (Y-axis movement only) and HV (both X and Y-axis movement).
- Can be configured directly from the level file via global variables.
- Does not interfere with other scripts and prevents memory leaks.
System Architecture
Ladder Parameter Storage
All ladder parameters are stored in global variables. For each ladder, the system saves its center coordinates (x, y, z), grab zone width (w), height (h), and type (type). The default maximum limit is 5, but more can be easily added.
C:
float ladd_x0, ladd_y0, ladd_z0, ladd_w0, ladd_h0; int ladd_type0;
float ladd_x1, ladd_y1, ladd_z1, ladd_w1, ladd_h1; int ladd_type1;
// ... up to ladd_x4
int ladd_count = 0;Core Functions
add_ladder(x, y, z, w, h, type) – adds a ladder to the list.
init_ladders() – reads the level's global variables (ladder_count, ladder0_x, …) and populates the internal list.
set_current_ladder(idx) – fills helper variables (cur_lx, cur_ly, ...) with the parameters of the ladder at index idx. This approach is used specifically to avoid pointers.
process_ladders() – the main function that must be called inside the level block within update.c. It processes all players (0 and 1), checks if they are within a ladder zone, and handles grabbing, movement, and releasing.
How the Processing Works
When the level changes (current_level is not equal to the previous one), init_ladders() is called to load parameters from global variables.
- For each player, the system checks if they are already on a ladder (using the ladder_idx variable).
- If the player is on a ladder — the system handles movement (up/down; for the HV type, left/right as well), checks boundary limits (top/bottom), and triggers jumping off if the jump button is pressed.
- If the player is not on a ladder — the system checks if they are inside the grab zone of any available ladder. If they are and the "Up" button is pressed, the player grabs the ladder.
Example for a single vertical ladder:
C:
updatescript @script
void main()
{
setglobalvar("ladder_count", 1);
setglobalvar("ladder0_x", 100);
setglobalvar("ladder0_y", 95);
setglobalvar("ladder0_z", 0);
setglobalvar("ladder0_w", 40);
setglobalvar("ladder0_h", 190);
setglobalvar("ladder0_type", 0);
}
@end_scriptParameters:
- x, y, z – the center of the ladder.
- w – the width of the grab zone along the X-axis.
- h – the height of the ladder along the Y-axis.
- type – 0 (vertical, up/down movement only) or 1 (HV, additional left/right movement).
Anyway, there is still a lot of work to be done on it.
O Ilusionista
Captain 100K
Looking good! Just two things to note:
I like the result on the video, but I think the character is too far away in z axis from the ladder, which makes him to look that he is floating
I don't think you need an updatescript here, as since you aren't using any check first, you are setting those global variable in every engine update. You can move this for a levelscript, as it is fired once per level. Or even just add the script inline in any spawn on the level.
I like the result on the video, but I think the character is too far away in z axis from the ladder, which makes him to look that he is floating
MKLIUKANG1
Active member
Hello everyone! It's been a while since we posted news. We have little free time, so we do what we can when possible. Here's what's new at the moment.
Implemented
1. Ladders and Rope
A full climbing system has been added, working for both players and enemies. The old ladder implementations had to be removed because they were broken and caused various issues.
Vertical Ladders
Enter with U/D. Smooth climbing up and down.
Protection against accidental re-grabbing.
Horizontal Ladders
Enter with U/D. Move left/right/up/down.
Width and height restrictions.
Automatic jumping off at boundaries.
Rope
Enter with L/R. Horizontal movement.
Punch attacks (A) and kick attacks (A2) directly on the rope.
Detach with Jump button.
Auto‑jump off at the ends.
For enemies (e.g., Guido), enemy_climber, enemy_stair2, enemy_rope functions have been implemented, allowing them to automatically attach to objects and move toward the player.
2. Weapons (Bat and Pipe)
Added Bat and Tube models.
A unique sound plays when picking up each weapon.
Fixed infinite sound repetition in the Get animation.
3. Pain and Fall Animations
Added new Fall/Pain animations reacting to different attack types.
Restored gravity on knockdown (fixed the "flying into space" bug).
Screen shake via the do_quake script + invisible Quaker object — now the effect triggers every time, not just once per game.
4. Technical Fixes
Removed the abs call and arrays not supported by the engine.
Added the universal finisher_all_falls function.
Optimized transitions in combo series.
Enemies correctly restore physics after leaving ladders and ropes.
All changes were made through scripts without modifying the engine's source code.
If you have questions or suggestions — write in the thread. Thanks everyone for your attention!
Good job! I liked the custom menu via skiptoset/skipselect.