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Obtaining angle of object in relation to camera direction

Paul Lou · 2016-05-05T03:45:49

What I'm trying to achieve is get the angle that an object is in relation to the direction the camera is facing. From the image I've provided: Point A: Camera position. Point B: Reference point which is always in front of the camera's view regardless of rotation. Point C: Object in question. Calculating the angle between point B and C is fairly easy, but the problem is that the yaw of my camera (in degrees) is according to world space and not in view(camera) space. This becomes problematic depending on which Cartesian Quadrant the camera position currently resides in. How do I define degrees based on the camera's direction independent of world space?

General and Gameplay Programming Programming

Started by Cappah April 28, 2016 10:04 AM

11 comments, last by Hawkblood 7 years, 11 months ago

ankhd

2,304

May 01, 2016 05:52 AM

This may help, if the images load, here

Norman Barrows

7,180

May 01, 2016 09:47 AM

rel heading = atan(dx/dz)-yr, whats the big deal? get your signs straight and trap out divide by zero, that's about it. and that's all in world coordinates, BTW.

trig is the the math discipline behind that. if you want to program games, learn trig - then learn linear.

Norm Barrows

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