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Camera look at vector
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Posts: 3


Sat, Apr 20 2013


Im rotating camera with

camera.rotateX = rX;
camera.rotateY = rY;
camera.rotateZ = rZ;

and i want to place objects directly in front of camera.

Is there a way to get lookAt vector from camera or other way to find out where the camera is looking?

0% like this - 0/0


Posts: 3


Mon, Apr 22 2013

In response to: @dineybomfim

All those methods are setting the look at vector, i need to get it after camera rotates
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Posts: 571


Mon, Apr 22 2013

In response to: @KladimirVladne

Actually you don't need it. You don't need to know the vector of where the camera is looking at.
This is why you can set targets on any NGLObject3D, any objects can follow and be bound to any other object.

Besides, it will be just a vector, not a fixed point in the screen, and object over this vector doesn't mean it will be visible to the camera, there are many other factors in this final truth.

But if you think you need to know the vector to some sort of screen conversion, well, in this case you'll need to calculate the vector by your own using the camera matrix. NinevehGL gives you access to any matrix, Model, View, Projection, ModelView, ModelViewProjection, etc...
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Posts: 3


Mon, Apr 22 2013

In response to: @dineybomfim

thanks for help, i ended up calculating the vertor myself
100% like this - 1/1

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