3D model selection method and device

Abstract

The invention provides a 3D model selection method and device. According to the 3D model selection method and device, a traditional collision detection ray detection mode is abandoned, a collision detection surface is used to move forwards in the direction of a collision detection ray to form a collision detection body, detection will not stop after the collision detection surface collides with a model, instead the collision detection surface continues to move in the ray direction till penetrating into all models which the collision detection surface collides with in the ray direction, and all the models obtained through collision detection are returned for a user to select. Through the 3D model selection method and device, the problem that when multiple tiny models are gathered and concealed, accurate selection cannot be realized is solved; especially the user has higher probability to include the tiny or concealed models into a detection range when using 3D human body teaching software, and therefore precision and usability during 3D model selection are improved.

Description

technical field [0001] The present invention relates to a method and device for accurately selecting a designated model among multiple 3D models, in particular to a method and device for accurately selecting a single or multiple designated models in complex and small 3D model combinations. Background technique [0002] For software with 3D model operation functions, it usually has the function of selecting models or positioning model parts. Especially in medical teaching software, it is necessary to accurately locate and select the human body structure for teaching. In the prior art, this function is realized by using a mouse or a finger to click on a model, and the clicked model becomes selected. see figure 1 , starting from clicking the mouse or touching the touch screen with the operating body (usually a finger), and launching a "collision detection ray" from the click to the model. When the ray hits the model, it returns to the program the first collision name of a mo...

AI Technical Summary

Problems solved by technology

When the models are relatively small, clustered together or overlap with each other, it is difficult for users to select the object model they want to select, especially when the model is blocked or there are a lot of other models around. At this time, it may occur Many missed points, or other models must be moved or rotated before selection can be made, or even the target model cannot be selected at all

At the same time, using the traditional method, only the first detected model can be selected at a time, but not all models that can be collided in the ray direction, so it is difficult to select the fine model inside the model

Images