Sorry your browser is not supported!

You are using an outdated browser that does not support modern web technologies, in order to use this site please update to a new browser.

Browsers supported include Chrome, FireFox, Safari, Opera, Internet Explorer 10+ or Microsoft Edge.

developer forums

Dark GDK / SETting the angle of a sprite

Author

Message

Ascent321

Years of Service

User Offline

Joined: 2nd Oct 2007

Location:

Posted: 29th Jul 2008 21:41

Link

Im trying to make a sprite follow the cursor and point towards it.
The sprite follows the cursor just fine, but it wont point towards it. Im guessing this has to do with the Rotate function not SETTING the angle but adding to the current angle.
How would I fix this?

+ Code Snippet

		mouseX = dbMouseX();
		mouseY = dbMouseY();

		p1->angle = atan2((mouseY - p1->y), (mouseX - p1->x));
		p1->x+=cos(p1->angle)*p1->speed;
		p1->y+=sin(p1->angle)*p1->speed;


		dbRotateSprite(1, p1->angle);
		dbSprite(1, p1->x, p1->y, 1);

Profile PM

IanM

Retired Moderator

Years of Service

User Offline

Joined: 11th Sep 2002

Location: In my moon base

Posted: 29th Jul 2008 23:17

Link

No, it does set the angle, but the GDK uses degrees rather than radians. You only need use the dbSin, dbCos and dbAtanFull functions instead of the standard C++ functions.

[b]Utility plug-ins collection (updated 01/07/08) and
http://www.matrix1.demon.co.uk

Profile PM Email Website

Server time is: 2024-11-20 17:46:29
Your offset time is: 2024-11-20 17:46:29