How to determine a coordinate point is visible on the screen: the left eye monster in the below image coordinates (under the current view is not visible)

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The model built by the... Or you don't map set?

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Part model test under the normal check whether opposite

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Calculation on a bit of the normal eyes, the Angle between the vector if it is connected to a video camera & gt; 90 degrees, shows that it is facing the camera, visible, of course

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reference tianmao111 reply: 3/f

calculation on a bit of the normal eyes, the Angle between the vector if it is connected to a video camera & gt; 90 degrees, shows that it is toward the camera, visible, of course

Consider the problem of shade

Embarks from the camera to achieve the target of the ray, ray and the intersection of all visible objects in the scene, if the target is closest to the camera of intersection of all points that can be seen,