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Hello and welcome to this lecture in this part two of the barns and the ball lectures we will be implementing.

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Coalition detection the coalition detection will check if the ball is touchin or colliding with the

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wars on the campus.

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There are four walls of the campus.

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You've got the top the bottom left and the right.

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So we'll implement coalition detection to spot or detect if there's any coalition between any of the

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walls.

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If there is any will will create calculations so that the ball will change the direction of this movement.

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We are going to create a variable called ball radius.

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This variable will hold the radius of the drawn circle that will be used to perform the cuk relations.

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OK so let's create the variable create its other top here called fireable.

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We are very low call ball

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radius.

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Now give it a value

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of 10.

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Now that we've created a variable called ball radius is less of date are drawn ball function.

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So where we've got the rate is here we removed this value and replace that will borate Yes

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we can send them.

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All right.

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This is a value we need to remove the actual radius and then to get too many commas there.

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So that's the X Y variable and this is the borate of variable.

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And then there's this the Ark where the ark starts and this is where they are.

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NS There are four walls for the ball to bounce off the Cambers with the top the bottom the left and

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the right.

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Okay let's determine the how we cut callate the coalition point of the Bosso conference.

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We got to do this using if statements okay we're going to place the statement just below the drop ball

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function.

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So what we are going to say is we're going to start with the left and the right wars.

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So we'll see if

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the x variable bloss Details variable

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is greater.

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So if the x variable Plus the Dick's variable is greater than the come fast

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with.

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Minus the borate Yes.

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So it explores the experienceable is greater than the covers weight minus the ball radius all this symbol

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of pipe Emens or all x bloss the x variable is less than the ball radius.

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Okay.

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So this is the statement here.

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So we're saying if this x plus the x is greater than the come of us with mine or the boy radios or if

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exploded the AIDS variable is less than the borate does.

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This is what should happen.

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We put calibrate since it should what should happen is that is either this condition is true.

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The first condition is true or it's a second condition is true.

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This is what we want to happen.

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We want the value of x to be equal to.

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Two equals two minus the decks.

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So this is what will happen if the first condition or the second condition is true in if it meant the

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value of Diddy's x variable would be it to minus the x variable.

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Thus we relate to the left and the right was of the compass.

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So for the top the bottom will be equal use the same code and being lasic one going to do just copy

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this if statement has changed the value.

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Copy here.

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Okay and I'll just change the values so it would be Y.

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If y plots the y

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y plausible y canvas dot right

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okay.

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Minus the ball radius or wine laws the Y is less than the boy radius.

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If that condition is true indeed y will be lost to a minus D Y.

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All right so this is State me too.

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Is it menhir I use to implement a simple coalition detection that will make the board change direction.

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If any completion is detected.

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So the first.

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What if statement here refers to the left and the right was of the compass.

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If the X blows the D X variables is greater than the compass with minors bore radius.

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No Remember I've declared the value of football radio so we're saying that the x variable Plus the variable

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is greater than become vets with minus the ball radios.

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Or if the x variable plots the defence variable is less than the ball radius then this condition between

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this curly braces will happen.

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That means the value of the X will be equal to or minus dicks in the second if statement.

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This will refer to the top and the bottom was on the Cambers.

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If the Y variable plods the D Y variable is greater than the converse height minus the ball radials

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or if y plus D Y variable is less than the ball radius.

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Then the condition between the curly braces will happen.

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That means the value of the D Y variable will be equal force to minus the Y.

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So this is just a simple coalition detection implementation using the if statements.

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See when the distance between the centre of the ball and the edge of the wall is exactly the same as

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the radius of the ball.

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It will change the direction of movement so subtracting the radials from one edge with an add in it

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on to dolar give the impression that some coalition has been detected and then the ball bounces off

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the wall.

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So save the code.

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Okay then check are hastier mount and see what the code looks like.

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Go run lunch in Chrome.

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We should have a proper coalition detection you see that.

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So the ball is now within the compass.

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Cause there's a collision detection in place it says bouncing off the walls of the compass so that's

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it for this project.

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Thank you so much for your time in watching.

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If you have any questions whatsoever please do not hesitate to contact me.

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TRAMP practice and change some of the values of what we have learned and just play around to familiarize

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yourself with the way things work.

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Don't be scared to break anything you can always make copies of your original code and just try and

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break it.

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Try new things and improve your skills.

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Thank you so much.

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And by for.