A Symbol Library Based on 3D Plotting System
A symbol and plotting technology, applied in the field of symbol library, can solve problems such as poor scalability, difficulty in symbol library implementation, long development cycle, etc., and achieve the effect of reducing complexity and facilitating dynamic expansion
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[0026] In order to verify the effectiveness of the solution of the present invention, the following simulation experiments are carried out, taking the point symbol "port" as an example, to fully describe the specific process of the symbol library from receiving user input to completing rendering.
[0027] Step 1. The user initiates a request to the symbol library through the unique identifier 10200 of the point symbol "port", and the three-dimensional plotting system obtains the geographic coordinates GeoP=(122,22) selected by the user by monitoring the mouse event. Parameters passed to the vertex generator.
[0028] Step 2: The vertex generator searches the symbol information base to obtain basic information such as symbol type, initial attribute and instruction set index according to the unique identifier of the symbol.
[0029] Step 3. The vertex generator obtains the control point description instruction and the primitive description instruction through the instruction set...
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