# Gloss SDL
This project is under development, don't expect anything to work yet
This is an experimental rebuild of gloss on top of libsdl. We may also change the rendering engine to be based on Constructive Solid Geometry (CSG) and ray tracing instead of rasterization. If this effort succeeds it will become Gloss 2.
The current Gloss library suffers from the following problems, which we try to address in this work:
1. The first version of Gloss used GLUT to manage windows, but the GLUT website itself says it has "been unsupported for 20 years". SDL is actively maintained.
2. Gloss can also use GLFW for window management, but still relies on GLUT for drawing vector text. SDL_ttf provides its own text support.
3. GLUT supports only a single vector font, while SDL_ttf can draw text using standard true type font files.
4. Once control enters the GLUT main loop it does not escape. GLUT redraws can happen on window events or at a fixed timer expiration. Redraws cannot be triggered by external events such as file or network activity. The current Gloss displayIO interface tries to hack around this limitation, but the interface still only updates static pictures once per second. Using the SDL API one can define their own main loop and trigger redraws based on arbitrary events.
5. GLUT does not support high dpi displays (like Retina displays on Mac). GLFW seems to have some support, but the Gloss authors haven't tested it yet. SDL has working and maintained high DPI display support.
6. Gloss has a variety of problems when launched from the GHCi console, ranging from crashes, low framerates, or force quit of GHCi when the window is closed. The behaviour is variable depending on the platform. The SDL event framework allows the window to be closed without quiting the host executable.
7. The Gloss picture type includes a polygon constructor, which allows polygons to be defined by a path, but there is an unchecked precondition that the polygon must be convex. Trying to defined non-convex paths results in undefined behaviour. There was a project to add triangulation support to gloss but the resulting code was deemed too complex to be merged. In the move to CSG we can present primitive triangles and rectangles as polygons and avoid general polygons.
8. The Gloss picture type includes circle and arc constructors. The rasterization code for circles and arcs is a bug farm, and still has known problems. Moving to CSG/ray tracing style rendering will allow us to draw circles and arcs at full resolution in a way that hopefully avoids rasterization bugs.
9. The Gloss interface API provides both "pure" and "IO" versions of top-level functions like "display" and "simulate". If we can separate the picture and rendering API cleanly from the window management functionality then we could provide just the "pure" interfaces for simple use-cases. We would require users to use a lower level IO based API for IO driven applications.
10. Gloss does not have sound support, and there appears to be no simple graphics/sound interface in the Haskell ecosystem. Attempts to combine separate audio libraries with gloss usually end up with latency problems, resulting in auto clicking. SDL has an integrated audio framework. We should also move generation of simple audio streams out of the domain of the GHC thread scheduler.
无痛二维矢量图形、动画和模拟。___下载.zip
版权申诉
61 浏览量
2023-04-16
19:44:56
上传
评论
收藏 807KB ZIP 举报
无痛二维矢量图形、动画和模拟。___下载.zip （184个子文件） 
lena-101x101.bmp 30KB
Interface.c 9KB init.c 7KB Solver.c 6KB Main.c 5KB render.c 4KB Model.c 4KB main.c 3KB gloss-examples.cabal 14KB gloss.cabal 4KB gloss-rendering.cabal 2KB gloss-raster.cabal 1KB gloss-algorithms.cabal 1KB world.dat 1KB world8.dat 100B world4.dat 40B .gitignore 66B .gitignore 9B .gitmodules 93B Model.h 912B main.h 665B Solver.h 529B Interface.h 262B GLFW.hs 26KB GLUT.hs 17KB Picture.hs 14KB ViewState.hs 14KB Field.hs 13KB Main.hs 11KB Main.hs 11KB Array.hs 11KB Main.hs 10KB Args.hs 10KB Main.hs 9KB Circle.hs 9KB Line.hs 9KB Solver.hs 7KB Picture.hs 7KB Object.hs 7KB Types.hs 6KB Collide.hs 6KB Game.hs 6KB Model.hs 6KB Picture.hs 6KB QuadTree.hs 5KB Interact.hs 5KB Extent.hs 5KB Main.hs 5KB World.hs 5KB Color.hs 5KB KDTree2d.hs 5KB Advance.hs 5KB Contact.hs 5KB Idle.hs 4KB Linear.hs 4KB World.hs 4KB Simulate.hs 4KB Randomish.hs 4KB Animate.hs 4KB UserEvent.hs 4KB Draw.hs 4KB Boundary.hs 4KB Main.hs 3KB Main.hs 3KB Advection.hs 3KB Color.hs 3KB Timing.hs 3KB QuadTree.hs 3KB Display.hs 3KB RayCast.hs 3KB Gloss.hs 3KB Main.hs 3KB Display.hs 3KB Debug.hs 3KB Main.hs 3KB Interface.hs 3KB Segment.hs 3KB World.hs 3KB Project.hs 2KB Window.hs 2KB Cell.hs 2KB Main.hs 2KB Bitmap.hs 2KB ViewPort.hs 2KB Common.hs 2KB FieldElt.hs 2KB State.hs 2KB Trace.hs 2KB Light.hs 2KB Simulate.hs 2KB Animate.hs 2KB Rendering.hs 2KB Game.hs 2KB Vector.hs 2KB Sources.hs 2KB Config.hs 2KB Actor.hs 2KB State.hs 2KB Community.hs 2KB Vec3.hs 2KB共 184 条
- 1
- 2
资源评论
