Solution to collision detection based on bounding box in Vega Prime

Abstract

Collision detection in Vega Prime is based on the simple line segment, and collision detection based on bounding box is not realized. By studying the composition of three-dimensional object, we define a collision detection class, which inherits from vplsector. After finding out all vertices of geometry in object, we connect these vertices one by one and constitute a trend line. The trend line constitutes our bounding box. Now, our collision detection is based on three-dimensional objects, but not the simple line segment.Additionally, we can expand x, y, z in all vertices in proportion and achieve early warning mechanism in virtual reality

Application of Collision Detection in Visual Simulation System for Bridge Cranes

“…Vega offers a variety of Volume types including Box, Sphere, Cylinder, Frustum, points, lines, polygons, and segments. The Z method, LOS method, ZPR method, and HAT method are composed of a vector segment, hence, they can only detect if there is a collision occurs on one direction [3,4]. Nonetheless, BUMP method consists of 6 perpendicular segments, all six segments extend along the X, Y, Z three axes in the direction of the positive and negative, which constitute a box.…”

“…All around can detect whether there is a collision occurred. The size for the box composes of these segments are determined by three parameters, which is VGIS_BUMP_ WIDTH, VGIS_BUMP_LENGTH and VGIS_ BUMP_HEIGHT [4]. Moreover, Intersection test information such as the position, orientation, etc detected by BUMP method is saved in result array.…”

“…Vega as a professional visual simulation software offers intersection vector methods to meet the real-time collision detection. It is the principle of collision detection that intersection test is completed according to the Isector Class packaged by Isector and Volume two modules [4]. In other words, the intersection test will happen between the target's Volume specified by Isector instance and the space range (Volume) corresponding with the method set by this Isector instance.…”

“…Therefore, the collision detection technology is applied combining with the collision requirements of hook and goods in the virtual simulation system for bridge cranes and based on the principle of collision detection provided by Vega in this paper [3]. The collisions between the hook and goods, hook and machine tools or other virtual objects in the scene are avoided according to set the collision between hook and virtual objects using intersection vector methods [4] provided by Vega. The authenticity of virtual environment and users' immersion are ensured.…”

Study on Rice Transplanter Experiment Based on Virtual Reality

“…Furthermore, the VSG (Vega Scene Graph) module of VP can render scene on crossed-platform. Users could develop visual simulation applications rapidly to meet with different requirements [8] . Acquisition of proving ground parameters.…”