[uPeppe]

I made a Pool Script and I move balls' position with this code (done every 20ms):

Код:

GetObjectPos(PoolBall[i][bObject], x1, y1, z);
x1 += ((PoolBall[i][bSpeed]/50) * floatsin(-a, degrees));
y1 += ((PoolBall[i][bSpeed]/50) * floatcos(-a, degrees));
SetObjectPos(PoolBall[i][bObject], x1, y1, z);

That's a small code that works perfectly, but I have a problem with ball rotation (that with SetObjectRot). Here's how I did it:

Код:

GetObjectRot(PoolBall[i][bObject], rx, ry, rz);
rx -= ((20.0 * PoolBall[i][bSpeed]) * floatcos(-a, degrees));
ry += ((20.0 * PoolBall[i][bSpeed]) * floatsin(-a, degrees));
SetObjectRot(PoolBall[i][bObject], rx, ry, rz);

So I realized that this isn't the right way to rotate a ball..

Who can tell me the right algorithm to rotate a ball that's moving, knowing the angle of direction and the moving's speed?

PS: Note that "a" is the angle of ball's direction.

[Dredd]

I think you did it right, can't find errors :/

[uPeppe]

Quote:

Originally Posted by Derbyan I think you did it right, can't find errors :/

The error is that I don't use the right algorithm...

[Lorenc_]

Pretty pointless using the trigonometrical functions, I mean you can do it another way:

pawn Код:

GetObjectRot(PoolBall[i][bObject], rx, ry, rz);
rx -= 0.3;
ry += 0.3;
SetObjectRot(PoolBall[i][bObject], rx, ry, rz);

Should spin nice since you've got a 20 ms timer, though isn't necessary, 50 - 75 is good enough..

[uPeppe]

Quote:

Originally Posted by Lorenc_ Pretty pointless using the trigonometrical functions, I mean you can do it another way: pawn Код: GetObjectRot(PoolBall[i][bObject], rx, ry, rz); rx -= 0.3; ry += 0.3; SetObjectRot(PoolBall[i][bObject], rx, ry, rz); Should spin nice since you've got a 20 ms timer, though isn't necessary, 50 - 75 is good enough..

This way is wrong, because it doesn't consider the direction angle (a).

[Phanto90]

Quote:

Originally Posted by Lorenc_ Pretty pointless using the trigonometrical functions, I mean you can do it another way: pawn Код: GetObjectRot(PoolBall[i][bObject], rx, ry, rz); rx -= 0.3; ry += 0.3; SetObjectRot(PoolBall[i][bObject], rx, ry, rz); Should spin nice since you've got a 20 ms timer, though isn't necessary, 50 - 75 is good enough..

He wanted to do a realistic movement Lorenc.
The problem is setting the rotation based on the direction of the pool ball.

[uPeppe]

No one can help me?

[uPeppe]

UP

___

[uPeppe]

UP.. After a month D:

[Backwardsman97]

Should be some complex math involved. Try googling it. All I could find were algorithms for ball collision. I know it can be done though, some guy made a video of it.