Build entire 3D cities Create a massive city all at once instead of modeling each building individually. CityEngine powers rapid adjustments to the architectural style or other features of your city so you can easily create multiple design scenarios. Design urban environments Make 3D models to show planned changes and alternate designs. Inform your designs with 3D representations of regulatory and land use conditions. Share multiple design alternatives with your team or stakeholders to gather feedback.

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Selects all objects inside or touching the selection rectangle Left-to-right rectangular selection Selects all objects completely within the selection rectangle The left-to-right rectangular selection is usually used to select tiny objects such as single Street Graph Nodes when there are many objects occupying the same space.

Modifier keys While the Selection Tool is active, press Ctrl and Shift to either add or subtract from your selection. The modes are also listed in the Selection Tool submenu in the toolbar.

Selection context menu Once you have a selection, the right mouse button context menu contains entries with which you can select additional elements. This means that CityEngine uses rules to generate the 3D model. Assign rules In this tutorial, the rules are already provided. Select one block, and change its subdivision parameters in the Inspector from Recursive Subdivision to Offset Subdivision as shown below: For more information on block subdivision and dynamic city layouts, see Tutorial 2: Terrain and dynamic city layouts.

Select one shape within the block, and use the context menu to Select Objects of Same Group. Drag and drop the building. After dropping the rule onto the shapes, the model generation is automatically started. Your first buildings appear. Make sure the visibility of models is activated by toggling with F Generated models can also be deleted in the right mouse button context menu.

New variations of the buildings can be created by changing the seed value. Reset the attributes to the building. Because CGA is a scripting language, it offers you a generic and flexible tool to create 3D models for all types of cities. Open the building. Start editing the building. Edit the rule file Inspect building. Change the random height values in the Rule Editor.

Save the rule. The building now has a random height value of Note: The reason you use Update Seed is because the height is a random value and you need to update the random seed value when regenerating the building. Add roof geometry by adding a new Rule named Roof to the building.

By doing this, you will keep the building height at


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