Graphics Engine

A simple 3D graphics engine using LML which renders obj files.

Setting up a scene using "render_pgm"

Run the program and you will be prompted to set up a scene.

Settings

Export settings:

• render name: The name of the file to render to (exclude folders and file extension).
• screen width: The width of the screen in pixels.
• screen height: The height of the screen in pixels.

Camera settings:

• perspective: Set to 0 for orthographic projection, or 1 for perspective projection.
• far clipping plane: The distance from the camera to the far clipping plane (default: 10).
• near clipping plane: The distance from the camera to the near clipping plane (default: 0.1).
• field of view: The field of view in degrees (only used for perspective projection).

Object settings:

• obj file: The name of the obj file in the obj folder (exclude folders and file extension).
• scale: The scale of the object in world space (default: 1 1 1).
• rotation: The rotation of the object in world space (default: 0 0 0).
• position: The position of the object in world space (default: 0 0 8). Note: The z-axis is forward and the y-axis is up.

Example

--------------- SCENE SETUP ---------------

Export Settings
        render name: rendered_sphere
        screen width: 800
        screen height: 800

Camera Settings
    use default camera? (y/n): n
        perspective: 1
        near clipping plane: 0.1
        far clipping plane: 10
        field of view: 60

Object Settings 
    Object 1:   
        object: Sphere
        use default position? (y/n): n
            scale: 1 1 1
            rotation: 0 0 0
            translation: 0 0 3
        add another object? (y/n): n

--------------- FINISHED SETUP ---------------

Press any key to render...

Using "render_all"

Ensure your OBJ files are in the obj folder and your PGM files are in the pgm folder. Then run the program and it will render all of the objects to the pgm folder.

5 objects queued.

Rendering...

          1. Cone                loaded...      rendered (6 tris in 1.93s)
          2. Cube                loaded...      rendered (6 tris in 1.98s)
          3. Icosphere           loaded...      rendered (32 tris in 1.99s)
          4. Sphere              loaded...      rendered (511 tris in 2.03s)
          5. Torus               loaded...      rendered (956 tris in 2.03s)

All objects rendered successfully.
(5 objects in 9.99s, avg: 2.00s)

Upcoming Features

• Z-ordering - so that objects are rendered in the correct order.
• Anti-Aliasing - so that edges are smoothed.
• Clipping - so that objects are not rendered outside of the screen.
• Custom lighting - so that objects are shaded based on custom light sources.
• Wireframe toggle - so that objects can be rendered as wireframes.