POI Special effects Market Research

POI Point is the most commonly used visual effect in 3D visualization , Conventional POI Point is in screen space （ Size has nothing to do with distance ） Draw a two-dimensional figure in , Point to a point in three-dimensional space through a pin , With some text messages beside it to describe this point , Deliver information efficiently , Like the following ：

But this is static after all POI Icon , Sometimes for better visual experience , Need some dynamic POI Special effects , This requires new design ideas , We visited some popular 3D visualization manufacturers in the market , such as 51world Of SuperAPI（http://superapi.51aes.com/apifunc） Provided. 20 There are more than scene effects , These special effects can be roughly divided into 2 class ： Plane animation class and rotation model class , Each half . We take this as an example to analyze a wave .

Planar dynamic diagram

The idea of plane animation is relatively simple and rough , Is in the POI Place a panel in the position of , On the panel, a GIF Moving graph （ Support translucency ）, And because the panel is always facing the camera , It looks like a three-dimensional object in motion （ Although it is easy to see flaws ）. Although this method is very rough and direct , But because it's easy to use , Good performance and other advantages , Graphic animation has long been used badly in the field of 3D games , So our inveta The plug-in also launched a solution based on dynamic graph without hesitation .

• type ： Fixed string “spawn-VFX”.

• Moving graph ： Select Picture id, from 0 Increasing , Integers .

• Location ： In 3D space XYZ coordinate （ Need to convert from longitude, latitude and altitude ）,cm.

• Size ： There is no need to pass on the parameters , Equal to the width and height of the picture itself （1px=1cm）.

• The zoom ： According to the scaling multiple of the sequence frame size , The set of real Numbers .

• cycle ： Sequence frame （GIF） Time to play it again , Company s.

Rotation model

Around the Z The model of shaft rotation is a little more advanced , The visual effect is more realistic than moving pictures , But it costs modeling and rendering , however POI Common small models have some common characteristics , For example, there are few triangular faces 、 Spontaneous light 、 Render with vertex colors 、 Rotate around the vertical axis , The origin is at the bottom . Use vertex shading （ Support transparency ） No UV Mapping , The volume of the model is greatly reduced , Each model has only 20~50KB, An average of 300 or 500 pieces of dough + The vertices . We inveta Plug ins naturally also provide generation POI The interface of the model .

• type ： Fixed string “spawn-model”.

• Model ： Choose a model id, from 0 Increasing , Integers .

• Location ： In 3D space XYZ coordinate （ Need to convert from longitude, latitude and altitude ）,cm.

• The zoom ： Zoom multiple of the whole model , The set of real Numbers .

• motion ： Select the rotation mode .