In this series, I will show you how to work with point clouds and how to trace and convert a point cloud to a BIM model. In my last post, I showed you how to create the walls and roof. In this post I will show you how I made the windows and the tower of the church using typical CAD commands.

Making the tower

I won’t go into too much detail about how I made the tower of the church because you will probably have a different point cloud with a differently shaped church and tower.

How to Do This:

  1. Use the point cloud as a guide. Make a tower on the left side of the church. Use DmPushPull, Slice, Subtract, Union and Loft.  Use Loft with Guidelines to get the rounded shape.how to make a church in CAD
  2. Use Shell to make the dome hollow. Select the lower face to be removed during the command. The section should look something like this:
    Tip: To make the smaller, domed roof scale down a copy of the larger domed roof.

Adjusting the buttresses and columns

I then adjusted the buttresses so that they had the correct heights and slope angle. To do this I used the Manipulator attached to a face.

How to Do This:

  1. DmPushPull the top of the buttresses to the lowest height. Use the point cloud as a guide.
  2. Select the top face, of each buttress, long click the mouse to get the Manipulator and rotate the faces until they are at the correct angle.
  3. Repeat as needed.modeling a church in CAD step by step

Adding windows

Next I created windows from polylines using BIMWindowCreate.

How to Do This:

  1. Set your UCS to a vertical face of a wall.
  2. Use Polyline and Arc to draw the contour of the window (Mirror the first arc, to get a symmetric result).window of church how to model
  3. Set Boundary detection to ‘On’.
  4. Set your UCS back to ‘World’.
  5. Hover over the boundary inside the window outline. Select BIMWindowCreate from the Quad and choose the ‘Triptych’ option. You should now have something that looks like this:window model a church how to guide BIM
  6. Use BIMInsert to reuse this window. Hover over the window and select BIMInsert from the Quad.
  7. Repeat steps 1-5 to create other windows, with different sizes and shapes.
    Tip: You can re-use the polyline to create new windows of different sizes. Use copy and scale. To scale the polyline in a nonuniform manner convert it into a block, edit it and then explode the block. Use the polyline to create a new window.
    You should now have something like this:CAD chuirch model in BRicsCAD with point cloud

The result so far might astonish you but be sure to come back for the last post in this Point Cloud to BIM series where I show you how to create the inner arcades and complete your church with a few finishing touches!


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Point Cloud to BIM Model:

  1. The Outside
  2. Windows and Towers
  3. The Interior