Dagon 0.8.0

IMPORTANT: this release doesn't work with DMD 2.081.0. Please, use Dagon 0.8.2.

Changes:

• Rendering
  • Dagon now requires OpenGL 4.0 (because of need for glBlendFunci). A long-term plan is to move to 4.3 to utilize compute shaders
  • ParticleBackend - a dedicated material backend for particle systems. It supports diffuse texture, per-particle color and transparency. Particle system now uses GenericMaterial instead of Material
• Materials
  • Non-opaque blending modes now work correctly for all shaders. Additive mode now takes transparency into account
  • More material properties are supported by standard shader, namely, shadeless, shadowFilter, transparency
• Assets & logics
  • Package assets support. A package asset is a Box container that stores meshes, entities, materials (for standard shader) and textures. They can be added directly to the scene or referenced using drawable mechanism, so you can use package assets both for level geometry and dynamic objects. Exporter for Blender is available. Format specification is here
  • Scene have been renamed to BaseScene, BaseScene3D have been renamed to Scene (there is an alias for backward compatibility)
  • Factory methods for creating assets (like addTextureAsset) are now part of Scene (former BaseScene3D). New factory methods have been added: addOBJAsset, addIQMAsset, addPackageAsset
  • Entity class now implements Drawable interface, meaning that entities can render other entities. This is especially useful to render multiple instances of the same package asset
  • Entity children are now sorted by layer when new entity is added to a scene.