Jump to content

View more

Image of the Day

Boxes as reward for our ranking mode. ヾ(☆▽☆)
#indiedev #gamedev #gameart #screenshotsaturday https://t.co/ALF1InmM7K
IOTD | Top Screenshots

The latest, straight to your Inbox.

Subscribe to GameDev.net Direct to receive the latest updates and exclusive content.


Sign up now

What's wrong with my code ?

4: Adsense

Old topic!

Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. If you wish to continue this conversation start a new topic.


  • You cannot reply to this topic
No replies to this topic

#1 Anonymous Poster_Anonymous Poster_*   Guests   

Likes

Posted 30 December 1999 - 12:24 AM

When I use this code for only rotating around the Y-as works it GOOD(It's a walk around in 3d space application).

void balk::rotate(double angle)
{
int t;
double alpha;
double distancexz;
for (t=0; t<8;t++)
{
distancexz=sqrt(x[t]*x[t]+z[t]*z[t]);
alpha = asin(z[t]/distancexz);
if (x[t]<0) alpha=PI-alpha;
alpha = alpha + angle;
x[t] = cos(alpha)*distancexz;
z[t] = sin(alpha)*distancexz;
}
}

But when I and some code for rotation around Y-as AND X-as works it realy bad:
The points of my objects move in comparision to other points of the same object ???

Here is the BAD working code:

void balk::rotate(double angley, double anglez)
{
int t;
double alpha;
double distance;
for (t=0; t<8;t++)
{
distance=sqrt(x[t]*x[t]+z[t]*z[t]+y[t]*y[t]);
alpha = asin(z[t]/sqrt(z[t]*z[t]+x[t]*x[t]));
if (x[t]<0) alpha=PI-alpha;
alpha = alpha + anglex;
beta = acos(y[t]/distance);
if (y[t]<0) beta=-beta;
beta = beta + angley;
x[t] = cos(alpha)*(sqrt(x[t]*x[t]+z[t]*z[t]));
y[t] = distance * cos(beta);
z[t] = sin(alpha)*(sqrt(x[t]*x[t]+z[t]*z[t]));
}
}

Even when I call this function "object.rotate(rot,0);" what will normaly gives just the same result as the good code are there still the same problems.
Anyone know what I have done wrong ?






Old topic!

Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. If you wish to continue this conversation start a new topic.