Flash, ActionScript variables and several examples to explain (7)

Tell Target command

Tell Target's role is to be from the external control movie clip, this command is easier, allow you to control every arbitrary movie clip, now we can start a simple exercise to do it!




Production of symbols:
To get started, create a two button symbols, one above the words stamped Play, the other marked Stop. Then do a movie symbol, which make a simple animation, can be more simple, as long as it moves on the line.

2. Arrangements Scene:
Now you have a video and two buttons on it, these three symbols are thrown into the scene up, let them stand in the location of the station, and then double-point the video symbol in the Instance Name field, type in this round. Instance Name on behalf of the object's name in the scene, with the name you can control the object, of course, you can type any name, but the two movie clip can do the same with the name.



3. Set command:
Then we let the button to pass commands to the video symbol to go inside, and then control its playback.
Two-Point Play of the button, open the Properties dialog and tap Actions panel, press Select Tell Target, on the right will see you as the movie clip taken from the Instance name, you can choose to control which symbols, we are here, of course the selection round, followed by adding a directive Play, to note is that the sort order, Play must be caught in the Begin Tell Target End Tell Target and between, if you want to adjust the order, you can press this button to control the order up or down a layer.



Hei hei! You have completed the Play button, Stop button to another command is the same, just have to replace Stop Play commands, such as left.



're Done, now do Test Movie to see out of the fruit.






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Characteristics of GIS

1. Spatial visualization (Spatial Visualizaiton)

a. profile feature space visualization of surface features

Information System is a computer simulation of the real world, and a geographical information system was highlighted its space on the relation between the real world. Use our space for all things in the state has a very intuitive feel. No matter that the screen can display a stepless zoom the map and information inquiries, or show a three-dimensional terrain model is bringing us right Xianshi spatial relationship of Renshi world more intuitive and specific. Perhaps we can use computer science in the popular "WYSIWYG" word to explain this.

b. the characteristics of surface features with spatial reference attribute information visualization feature

GIS spatial visualization of features include the right features on spatial distribution of attribute information Patterns Visualization This is a geographic information system is an important feature to ensure, that GIS 瀹炵幇 spatial information and attribute information integrated management, and to well established links between the two. For example, the use of one of China's administrative division map, we can extract the geographic information system database provinces, municipalities and autonomous regions in 1994 census data to calculate population density, population density, according to the classification index to specify a different color and fill displayed by the corresponding administrative polygons (this implementation is a space from the property to the association process), this property features room for thematic surface features can be achieved through the geographic information system tools for spatial visualization of reference information.

2. Spatial orientation (Spatial Navigation)

The use of geographical information systems, we can not only global overview of the study area, but also can zoom and roaming and other basic functions of GIS provides more depth to our area of interest to study.

A complete geographic information system provides a spatial database capabilities, we can use a small scale view of the overall and partial view of scale to large scale view details. Growing at the same time scale to show the spatial information content to the user will be constantly updated. For example, an administrative province in view the overall situation, only need to display large rivers, provincial, and municipal and county roads, railways and administrative district polygons and other global information, and, with the continuous increase of scale, we need to show that cases of land, buildings, park space for specific surface features. These and Cartography emphasized the concept of integrated graphics is similar.

GIS spatial orientation features can be reflected in spatial query functions. Cases using a provincial-level land use maps, we can query to find space "in the city park," and immediately zoom the map display range to all the "park" within the spatial distribution, such as the embodiment of space-oriented role .

3. Spatial thinking (Spatial Thinking)

GIS spatial database in the storage space around the object descriptions, it is also storing the spatial relationships between surface features, this feature is to provide a foundation for spatial analysis.

GIS spatial thinking is to use GIS database has stored the information, through GIS tools (such as buffer analysis, overlay analysis), generated in the GIS spatial database and information storage requirements.

Geographic information system will integrate a number of spatial analysis tools, and provide secondary development tools. Conducting spatial analysis, the user will be a variety of tools to research by the professional model organized into a program (ie the computer can identify and operation of thought), by 鍦扮悊 information system was completed, provided at the end results of the analysis of spatial visualization .

GIS spatial thinking allows us to reveal the spatial relationship, spatial distribution patterns and spatial trends, and other types of information systems can not complete the task.

Urban and Regional Planning is the geographic information system technology embodies the characteristics of spatial thinking, the most typical applications.






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