Thx BadMario for your explanation, it's a basic rebound that I wish so if I do not need the angle and I change the x and y depending on the side of the box touched, my question is how we determine the side hit ? thank you !

I find this formule from an old game in AS3 ( flash game )

 // hold our ball position
    var bx:Number = _main.mcBall.x;
    var by:Number = _main.mcBall.y;
    var br:Number = _main.mcBall.width * 0.5;

    // get our bounds (assuming that the brick has it's registration point
    // in the center) - extend by the radius of the ball to cover the points
    var left:Number     = this.x - this.width * 0.5 - br; 
    var right:Number    = this.x + this.width * 0.5 + br;
    var top:Number      = this.y - this.height * 0.5 - br;
    var bottom:Number   = this.y + this.height * 0.5 + br;

    // check the position of the ball in relation to our brick
    if( ( bx >= left && bx <= right && by >= bottom ) ||    // bottom
        ( bx >= left && bx <= right && by <= top ) )        // top
    {
        _main.mcBall.ballYSpeed *= -1;
    }
    else // hit the left or the right
    {
        _main.mcBall.ballXSpeed *= -1;
    }

[/code:2j92k98u]

To be clear with my problem i post the file of my collision engine and i repeat that i can t use any behaviors of construct 2.

worm1work.alwaysdata.net/test/test_collision.rar

And what i try to do for the bounce off it's to convert my angleofmotion to have thoses results :

0 degrees = (1,0)

90 degrees = (0,1)

180 degrees = (-1,0)

270 degrees = (0,-1)

And after i can invert direction of the bounce change x y to 1 or -1

Hi

Look at this

scirra.com/forum/viewtopic.php

Hi

I want bounce a ball on differents rectangular boxs without behaviors because i need to keep the x/y variables and then pass them through a relocation pass before the ball is drawn to the screen...

So i move the ball with :

System every tick - ball set X to Self.X+Self.speed_x*dt
                                - ball set Y to Self.Y+Self.speed_y*dt
[/code:mnqr0lnu]

I have the angle of motion of the ball with a function that i create.

For the collision with a box i use :

[code:mnqr0lnu]
Ball is overlapping box 
[/code:mnqr0lnu]

Now i don t know how to use the angle of motion to bounce off the ball .
I try to reverse x y coordinate with 

[code:mnqr0lnu]
X=cos(angleofmotion)
Y=sin(angleofmotion)
[/code:mnqr0lnu]

But the result is not very correct , the ball bounce off but not very realistic..

Thx for help

If I could handle the collisions by manipulating only x and y it would go

But I think it's the function iso move to offset that I do not finally understand

Ty but if i do that and not use "Iso move by offset" to move the bullet the z-ordering not work anymore ;(

Hi , thx for reply R0J0hound

I have a new problem with our behavior and custom bullet movement with angle of motion collision in isometric world.

Exactly the same problem that this post :

I make custom movement of bullet with :

Iso move by offset(
Self.random_speed*cos(angle(0,0,Self.random_vx,Self.random_vy))/distance(0,0,Self.random_vx,Self.random_vy)*dt,
Self.random_speed*sin(angle(0,0,Self.random_vx,Self.random_vy))/distance(0,0,Self.random_vx,Self.random_vy)*dt,
0
)
[/code:11hm8cps]

And when i hit something 

[code:11hm8cps]
Iso overlap at offset(0,0,0) - Set random_vx Self.random_vx*-1
                                               - Set random_vy Self.random_vy*-1
[/code:11hm8cps]

So the bullet go well in the opposite direction but with not the correct angle actually.

I try to add bullet behavior or add anothers plug in like rex_pixel-collide with your plugin canvas to detect angle of collision and add it and the custom movement but nothing work  I search for a solution very simple too but I do not find... Thx if you coudl help me a little .

Hi

I'm coming back after having made good progress on my isometric game thanks to you R0J0hound <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile" />

I'm now stuck on something and I need your wise advice to handle this :

worm1work.alwaysdata.net/test/snake_zorder.png

worm1work.alwaysdata.net/test/snake_zorder_2.png

As you can see I created a snake as in this game :

youtube.com/watch

The snake's head has the iso behavior and is work very fine in the isometric world. For the tail of the snake I tied sprites with the pin behavior (rope style) . The movement of snake is as I wish but now the big challenge it's about managing the rest of the body in the isometric world ^^

So my question is must I add to the sprites of the tail the isometric behavior too ? Or must I handle z ordering z ordering with the informations of the head ?

Thanks a lot for your help

Thx for explanations R0J0hound !

Now i explore others options of your cool behavior and i have a little problem with the function "position shadow object".

My idea is to position a shadow below all my blocks of sprite to simulate shadow caster so i try to do :

system - for each Blocksprite system - create object Shadow

Blocksprite - position object Shadow as shadow

But the system create infinite Shadow ^^

Ty for help me

Hi ,

Very good behavior R0J0hound !

I start to make a fake isometric game like :

youtube.com/watch

After searching what techniques would be best on forum and internet, i think our approach of z-ordering is the best.

I have just a question. As you can see the movements in the example game is on height directions,so i add 8 movements behavior but i don t if it s the most perfomant method with our behavior ? Any ideas ?

Ty for replies !

I have same problem that — . The effect work fine in localhost but when i export the project the effect bug ;(

Any ideas ?

Problem Description

I use a dropshad effect that work fine in construct 2 but when i export the project the effect bug

Any ideas?

Ty

PS: I try to put a link of screenshot into the post but the submit bug with it...

worm1work.alwaysdata.net/test/effect_bad.png

worm1work.alwaysdata.net/test/effect_good.png