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当我使用透视相机检查点是否在截锥体内时，它可以工作。但是当我使用正交相机进行检查时，截锥体框显得不准确。平面设置正确。如果使用正交相机，我是否还有其他需要更改的东西？

这是我设置飞机的方式..

    if((this.mouse.screenx>mouse.screen.x && this.mouse.screeny<mouse.screen.y)||
    (this.mouse.screenx<mouse.screen.x && this.mouse.screeny>mouse.screen.y)){
        topPlane.setFromCoplanarPoints(camera.position, topRight, topLeft  );
        rightPlane.setFromCoplanarPoints(camera.position, bottomRight, topRight  );
        bottomPlane.setFromCoplanarPoints(camera.position, bottomLeft,bottomRight  );
        leftPlane.setFromCoplanarPoints(camera.position, topLeft, bottomLeft  );
    }else{
        topPlane.setFromCoplanarPoints(camera.position, topLeft , topRight );
        rightPlane.setFromCoplanarPoints(camera.position, topRight , bottomRight );
        bottomPlane.setFromCoplanarPoints(camera.position,bottomRight , bottomLeft );
        leftPlane.setFromCoplanarPoints(camera.position, bottomLeft , topLeft );
    }
    nearPlane.setFromNormalAndCoplanarPoint(vector,camera.position);
    vector.set( 0, 0, 1 );
    vector.applyQuaternion( camera.quaternion );
    var vector2 = new THREE.Vector3( 0, 0, -config.camera.far );
    vector2.applyQuaternion( camera.quaternion );
    vector2.add(camera.position);
    farPlane.setFromNormalAndCoplanarPoint(vector,vector2);
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1 回答 1

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好的，我想通了这个问题。我正在创建我的平面，以便它们从相机的位置延伸，但是，这会产生一个锥形的截锥体。在正交模式下，没有锥形——一切都是笔直的，因此截锥平面不应该从相机延伸。

我所做的是得到相机的方向：

    var vector = new THREE.Vector3( 0, 0, -1 );
    vector.applyQuaternion( camera.quaternion );

然后我用它来创建每个平面——例如：

        var top = topRight.clone(), right = bottomRight.clone(), bottom = bottomLeft.clone(), left = topLeft.clone();
        top.add(vector), right.add(vector), bottom.add(vector), left.add(vector);

            topPlane.setFromCoplanarPoints(top, topLeft , topRight );
            rightPlane.setFromCoplanarPoints(right, topRight , bottomRight );
            bottomPlane.setFromCoplanarPoints(bottom,bottomRight , bottomLeft );
            leftPlane.setFromCoplanarPoints(left, bottomLeft , topLeft );

我有它，所以截锥体可以倒置 - 所以一定要检查飞机是否面向正确的方向。

于 2015-06-02T01:27:57.140 回答