Rotating the camera around an object?

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Dark GDK / Rotating the camera around an object?

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Mew151

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Joined: 1st Jun 2008

Location: Glitch city

Posted: 8th Nov 2008 02:31

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Can anyone offer me some code for rotating the camera around an object?

ow! that hurt!

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jezza

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Joined: 8th Mar 2008

Location: Bham, UK

Posted: 8th Nov 2008 09:46

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like side strafing around it? Here is what I would do, there may be a better way:
[on first frame]
-set camera to point at object

[every frame after]
-rotate camera 90 degree right
-move camera forward
-rotate camera 90 degree left
-set camera to point at object

and that should look reasonably smooth.

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Pillarofire

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Joined: 31st Dec 2003

Location: Good Question, <looks around.>

Posted: 9th Nov 2008 02:39 Edited at: 9th Nov 2008 02:40

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This was written for an object, but I'm sure simple modification will make it work for a camera.

+ Code Snippet


void RotateObjectAroundObject( int baseObject, int Object, float angle )
{
	float x = dbObjectPositionX(baseObject);
	float y = dbObjectPositionY(baseObject);
	float z = dbObjectPositionZ(baseObject);
	float dx = dbObjectPositionX(Object) - x;
	float dy = dbObjectPositionY(Object) - y;
	float dz = dbObjectPositionZ(Object) - z;
	float nx = dx * dbCos( angle ) - dz * dbSin( angle );
	float nz = dx * dbSin( angle ) + dz * dbCos( angle );
	nx = nx + x;
	nz = nz + z;
	dbPositionObject( baseObject, nx, dbObjectPositionY(baseObject), nz );
}

Cheers.

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Dark GDK / Rotating the camera around an object?