Figure 27-14. The castle in the test2.obj terrain
The user can enter a model and can walk right through its walls.
Terra3D doesn't enforce any constraints on the user's movements around models.
The placement of models and the user's initial position in the terrain are specified in a text file with the same name as the landscape's OBJ file; for this example, the text file is test2.txt in the directory models/:
start 3960 1800 255.64 Castle.cob 4100 4230 220 70 bldg4.3ds 6780 3840 780 90 hand1.obj 1830 570 781.98 120
The file format is:
start x y z <model file> x y z scale <model file> x y z scale // more model file lines
start line must be included in the file because specifies where the user is initially placed in the landscape, but the scenery objects are optional. The (x, y, z) values are in landscape coordinates, and the scale value is used to adjust the model's size in the terrain.
Each scenery object is loaded with a
PropManager object (introduced back in Chapter 16); the code assumes the existence of coords datafiles for the models.
A difficult task is deciding on suitable (x, y, z) and scale values. One approach is to jot down likely coordinates while running Terragen. Another technique ...