Awesome
Lace
- Provides a set of general Ada components intended to ease the development of game, simulation and GUI Ada applications.
- Components range from low-level ('events' and 'math') to high-level ('game engine').
- Potential applications areas include: 3d simulations, games, visualisations and editors.
- Supports distributed applications (DSA - see Annex E of the Ada Language Reference Manual).
- Portable across desktop and embedded platforms.
- Portable across OS platforms.
- Requires an Ada12 compiler.
- Requires an implementation of the Ada POSIX API (i.e. FLORIST).
- Several additional components are in a private prototype repository.
- Main idea is to tidy/add each private component, in turn, beginning with the base tier.
Content
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Components are organised into dependency tiers.
-
Each component in a tier can only depend on components in lower tiers.
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Diagram: 'lace/document/components/lace-components.png'.
| Tier | Component | Description |
|---|---|---|
| 5 ~ Top | User Applet | The user application. |
| 4 ~ High | gel | Game Engine Library. |
| 3 ~ Mid | opengl | OpenGL rendering support (2D/3D). |
| physics | Physics space/dynamics support (2D/3D). | |
| 2 ~ Low | collada | Provides a Collada parser. |
| 1 ~ Base | lace | Provides core types and a namespace for the Lace package family. |
| lace/events | Provides an event mechanism for event-driven applets. | |
| math | Provides core math functionality. | |
| xml | Provides a simple XML parser. |
Lace/Events additionally:
- Provides Subject/Observer and Event/Response abstractions.
- Is task safe.
- Supports DSA.
- See http://en.wikipedia.org/wiki/Event-driven_architecture
- and http://en.wikipedia.org/wiki/Event-driven_programming
Installation
The development packages for the following projects need to be installed on your OS.
- Bullet3d
- Florist/aShell (for 'Lace.Environ' only)
- Freetype
- Expat
- SDL
Example for Debian/Ubuntu:
apt-get install libbullet-dev libflorist2016-dev libfreetype6-dev libexpat1-dev libsdl2-dev
Adding the following lines to ~/.bashrc (or equivalent) will set the GPR_PROJECT_PATH for all gnat project files:
export opengl_profile=desk
export opengl_platform=glx
export restrictions=xgc
export OS=Linux
export FLORIST_BUILD=default
export LACE=/path/to/lace
source $LACE/lace-gpr_paths.sh
Of course, substitute '/path/to/lace' with the actual path you use.
This should allow any Lace component to be 'with'ed in a user applications gnat project file.
Lace/openGL contains a set of assets (fonts, shaders, etc). These need to be available in each openGL demo folder.
$ cd $LACE/3-mid/opengl/applet$ sudo cp create_opengl_assets.sh /usr/local/bin
Lace/mmi contains a set of assets (fonts, etc). These need to be available in each mmi demo folder.
$ cd $LACE/4-high/gel/applet$ sudo cp create_gel_assets.sh /usr/local/bin
Testing
$ cd $LACE/4-high/gel/applet/demo/sprite/mixed_shapes$ create_opengl_assets.sh$ create_gel_assets.sh$ gprbuild -P mixed_shapes.gpr$ ./launch_mixed_shapes
... or ...
$ cd $LACE/4-high/gel/applet/demo/skinning/rig/human_rig$ create_opengl_assets.sh$ create_gel_assets.sh$ gprbuild -P human_rig_demo.gpr$ ./launch_human_rig_demo golfer