Canvas hitbox problem

Thunkable Discuss
#1

Hi there,
I gotta to make a game called “Ball”,which a simple game controlling the ball to move to shoot these basic action.
Yesterday,I have been tried to use Ready Maker to do what I expected,but that is quite difficult to use.Therefore,I turn back to use Thunkable.

There is a problem that can be fixed or not?
I tried to make if the player ball is collides on the enemy ball,the health bar will substract to 5.
BUT,the hitbox is having extra area,due to the player ball collides on the air causes health bar do it’s substation.

78_Nov192019
78_Nov192019720×1280 704 KB

#2

Hi,

Show the image of the balls.

#3

I straightforward send the project link to you then.
https://x.thunkable.com/projects/5dd37137acac676d591f0cf1/71c4a4c5-39d7-4de6-b099-d23fe6041d8f/designer

#4

You thought it up well. I will see the project.

#5

In Live on iOS 12.4 and Android 8.1 everything works fine for me. The health indicator decreases only when the balls collide accurately

#6

:frowning_face:

#7

But I see a problem in Bluestackes. Try to display the coordinates of the ball of the player and the enemy. Perhaps the player’s step exceeds the distance to the enemy and it turns out that the collision occurred and the ball bounced back, but you do not see the collision itself. That is, the distance to the opponent’s ball is much less than the step of moving the player’s ball.

#8

I’m sorry,I do not understand.

#9

The distance between the balls is 10px, and the pitch of the player’s step is 20px

#10

so what solution you have thought :thinking:

#11

Did you display the coordinates of the balls on the screen for verification?

#12

what do you mean to display their coordinates

#13

The balls have X coordinates. Display them on the screen in Label

#14

live
live1080×1920 42.8 KB

above one : player’s x coord
bottom one : enemy’s x coord

#15

Now collide the balls and look at the coordinates.

#16

umm…I’m not understand after I did.I give you to see then.
https://x.thunkable.com/projects/5dd37137acac676d591f0cf1/0746cbcf-8431-4513-940c-09befeb9ed3d/designer

#17

Do your balls bounce at what coordinates? What is the step of moving the player’s ball? What size balls? You have all these parameters. Make an equation and see. Under what condition do the balls collide? When their bounding rectangles intersect with each other. Do you understand this?