Hitbox file
is a PNG image with alpha channel (or Texture2D) that is used to determine the custom level gameplay.
The hitbox file, called level.xnb, has the size of 780x585 pixels, every screen is ordered by column starting from top to bottom which means every screen has 60x45 pixels.
Block color table
Jump King uses a specific color to define what a block is inside of this file.
| block | description | usage | color |
|---|---|---|---|
| Solid | A normal block you can stand on | RGB(0,0,0) | |
| Slope | The player will slide standing on it | Needs two adjacent blocks | RGB(255,0,0) |
| Fake | The player will fall through it | Used also for slopes - alters wind, water and low gravity functionalities | RGB(128,128,128) |
| Ice | The player will slide on it but can still stand on it | RGB(0,255,255) | |
| Snow | The player cannot walk on it, but can still jump with enough power | Snake Ring bypasses it | RGB(255,255,0) |
| Wind | If placed on a screen, it will push the player slowly either left or right | The wind polarity reverses every 5 seconds | RGB(0,255,0) |
| Sand | The player will slowly fall through the block, while jumping and walking is still possible | RGB(255,106,0) | |
| No Wind | The player will fall through it | Alters wind, water and low gravity functionalities | RGB(255,255,255) |
| Water | Velocity and gravity is halved | RGB(0,170,170) | |
| Quark | read in detail | RGB(182,255,0) | |
| Teleport | If placed on a screen, it teleports the player to a specific screen using the RED of the RGB scale as the screen number | Works both left and right side of the screen | RGB(1,0,255) to RGB(255,0,255) |
| Low gravity | Velocity and gravity is between water and normal, the Y distance is slightly higher | (fixed all problems related with solid platforms in v1.3.1) | RGB(128,255,255) |
| Wind gradients | 16 values that determines the intensity of the wind | From 12.5% to 200% of the original wind strength based on the gradient | RGB(192,255,0) to RGB(207,255,0) |
| One-way wind gradients (LEFT) | 16 values that determines the intensity of the wind, the wind will never change direction. | From 12.5% to 200% of the original wind strength based on the gradient | RGB(208,255,0) to RGB(223,255,0) |
| One-way wind gradients (RIGHT) | 16 values that determines the intensity of the wind, the wind will never change direction. | From 12.5% to 200% of the original wind strength based on the gradient | RGB(224,255,0) to RGB(239,255,0) |
| Semi-solid | Block that is only solid on one side. | Solid from Top (R: 65), Right (R: 66), Bottom (R: 67), Left (R: 68) | RGB(65,65,65) to RGB(68,65,65) |
| Warp | (Like Teleport but on the same screen) | The red channel equals to the X location on the screen, the green channel equals to the Y location on the screen. | RGB(0,0,75) to RGB(60,45,75) |
If the red channel is still a concept you don’t understand, see it as the first RGB value (Red Green Blue) which is globally known on all image modification program.
Quark block
is a block that rounds the player to the closer in-game pixel (8 pixel distance) the player’s Y position to make falls less inconsistent.
In order to get the full potential of a quark block:
- It has to be used when player is in full falling velocity
- It has to be used on one of the side of the screen
Usage
(thanks to Erkstock for the image and the explaination!)
JumpKingPlus’ blocks compatibility table
| block | JK+ v1.1.0 or older | JK+ v1.2.0 to v1.3.0 | JK+ v1.3.1 | JK+ v1.4.0 to v1.6.1 | JK+ v1.7.0 | JK+ v1.7.1 to v1.8.1 | JK+ v1.8.2 or newer |
|---|---|---|---|---|---|---|---|
| Low gravity | ✗ | ? *¹ | ✓ | ||||
| Wind gradients | ✗ | ✓ | |||||
| One-way wind gradients | ✗ | ✓ | |||||
| Warp | ✗ | ? *² | ✓ | ||||
| Semi-solid | ✗ | ✓ | |||||
| Double teleport | ✗ | ✓ | |||||
*¹ - From version v1.2.0 to v1.3.0, there was a bug related to low gravity where the player standing on solid blocks would graphically jump. Later fixed on v1.3.1.
*¹ - From version v1.7.0 to v1.8.1, there was a bug related to warp where the player would teleport in a different screen in certain occasions. Later fixed on v1.8.2.