The aim of frustum is to demonstrate the Frustum Culling technique used in most 3D rendering software and games where several object exists in a scene but few of them have to be rendered in the view-port. To do so this technique uses some calculation to find out which objects can be seen by the camera and which can not, thus saving processing time.
To achieve a interesting demonstration the program simulates a virtual camera, it is a third person camera in which you can observe objects being rendered inside the view-port normally and wire-frame outside. User can move its real camera and the virtual camera using the commands:
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W: Move the user's camera forward
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S: Move the user's camera backward
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Arrow keys: Turn user's camera
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E: Move the virtual camera forward
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D: Move the virtual camera backward
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J, K, L, and I: Turn virtual camera
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1: Move the user's camera into virtual camera position
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2: Move the virtual camera into user's camera position
The program accepts one of several height maps(located in hmaps directory) to
generate the scene. The scene uses the map and put several procedure generated
objects like trees, rocks, grass and water.
Usage:
frustum heightmap.raw
A non ending woods with several procedure generated objects like threes, rocks, grass and clouds. The scene never ends because when user reaches a block end another block is put in front of him to continue path. Use arrow keys to move.
The dependencies are:
- OpenGL and GLUT.
- Cmake.
- C++ compiler.
To build, just run cmake to build the Makefile, and then make. The executables will
be placed inside bin folder.