Shooting at the Player

[robert83]

Super Vegeta , thank you!

Now that you told me , it makes sense ... and a lot of sense. Especially the disk io part . My game hangs for a sec when the Music changes.

I Need to rewrite the functions.

Load all Sound and Music effects on Startup . And then just Play the appropriate channel instead.
So if a Bullett is shoot by 5 different alliens instead of wasting disk i/o I just Play the channel from Memory when needed.


Thank you for this great advice!!!

[robert83]

Hi all,

Just wanted to post, I managed to solve the bullet calculation . Not alone unfortunately... google helped. And I don't understand it 100%.... I think I may end up taking private Math Classes

                    vx := (PlayerSprite.X+(PlayerSprite.ImageWidth/2)) - (Self.X+(Self.ImageWidth/2));
                    vy := (PlayerSprite.Y+(PlayerSprite.ImageHeight/2)) - (Self.Y+(Self.ImageHeight/2));

                    len := sqrt(sqr(vx) + sqr(vy));

                    vx := vx  / len;
                    vy := vy / len;

                    Bullet.Direction:= vx * 4;
                    Bullet.MoveSpeed:= vy * 4;

What happens here is the vector lenth is calculated... then normalised , I understand what it does... goes from 0 to 1 .... but this formula is something I would have never figured out

Also I realised my mistake...I need to alter the speed on both X and Y axis in order to work perfectly ... it even shots backwards...

Greetings...

ps.: I dont have any new material, I have level 1 done... altered the background, enemies use different attacks... level 2 is done..it turned out quiet cool... level 2 ending is done
It took a while to come up with a crazy story... Its god damn hard, but I will try and not post anything until done....4 more levels