Dragging objects freely on surface of point cloud
Wenliang Chen · Computer Engineering and Applications Journal · 2011
To drag objects freely and rationally along surface of point cloud,a dragging method based on hardware depth buffer is proposed.When mouse is down,the specified point cloud is rendered and the snap shot of the depth buffer in the current window is recorded.When mouse is moving,the recorded depth buffer is used to evaluate the next gravity and normal of the referenced polygon.The rotational and translational vector is constructed by using two neighbor gravities and normal of the referenced polygon.Finally,the functionality of object-moving along surface of point cloud is implemented.The experiment results show that any object can be dragged onto point cloud in real time and rationally by this method.