Check if Vector3 is in frustum

tkmoney · February 18, 2020, 11:35pm

I know there is a .isInFrustum method for the camera and meshes but what if I have an arbitrary Vector3 position and want to check if that position is in the camera frustum? How can I check for that?

Thanks!

Deltakosh · February 18, 2020, 11:42pm

hey!
the fastest way is to create a cube centered on your vector3 and make it unitary

Raggar · February 19, 2020, 12:18am

Can’t you just take the function from the boundingSphere class?

github.com

BabylonJS/Babylon.js/blob/master/src/Culling/boundingSphere.ts#L128


    }

    return true;

}



/**

 * Tests if the bounding sphere center is in between the frustum planes.

 * Used for optimistic fast inclusion.

 * @param frustumPlanes defines the frustum planes to test

 * @returns true if the sphere center is in between the frustum planes

 */

public isCenterInFrustum(frustumPlanes: Array<DeepImmutable<Plane>>): boolean {

    let center = this.centerWorld;

    for (let i = 0; i < 6; i++) {

        if (frustumPlanes[i].dotCoordinate(center) < 0) {

            return false;

        }

    }

    return true;

}



/**

https://playground.babylonjs.com/#RBWJX7

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Check if Vector3 is in frustum

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