3D WebGIS video fusion method under weak constraint condition

The invention discloses a 3D WebGIS video fusion method under a weak constraint condition, and belongs to the technical field of virtual video fusion. The method is characterized by comprising the following steps: S1, constructing a three-dimensional model; s2, optimizing and adjusting the three-dimensional model; s3, a 3DWebGIS platform is built; s4, accessing video stream data; s5, calculating a model view matrix and a projection matrix; s6, detecting the structure and shielding of the view cone; s7, performing shader rendering based on the WebGL fragment; s8, video image dynamic texture mapping; s9, performing video projection edge feathering; and S10, dynamically adjusting parameters. According to the 3D WebGIS video fusion method under the weak constraint condition, the problem of video projection shielding is solved to a certain extent, video fusion under the weak constraint condition is realized, the video fusion effect is improved, and meanwhile, the 3D WebGIS video fusion method has relatively high p