Elm的高级3D渲染引擎，支持光照、阴影和逼真的材质_Elm_下载.zip

# elm-3d-scene `elm-3d-scene` is a high-level Elm package for producing 3D graphics, with support for lighting, shadows and realistic materials:  It aims to make creating 3D graphics as easy and enjoyable as possible, without having to worry about low-level details like shader programs and transformation matrices. `elm-3d-scene` uses [`elm-explorations/webgl`](https://package.elm-lang.org/packages/elm-explorations/webgl/latest/) under the hood (and therefore requires [WebGL support](https://caniuse.com/#feat=webgl) to work), but no knowledge of WebGL is required to use this package. Any questions/feedback, please open an issue or please reach out in the **#webgl** channel or to **@ianmackenzie** on the [Elm Slack](https://elmlang.herokuapp.com)! ## Who is this for? `elm-3d-scene` is built to support a wide range of use cases, from [simple 3D loading spinners](https://ianmackenzie.github.io/elm-3d-scene/examples/1.0.0/animation.html) up to [near-photorealistic scenes](https://ianmackenzie.github.io/elm-3d-scene/examples/1.0.0/duckling.html). It is designed to be beginner-friendly with a smooth onramp to advanced features like [shadows](https://ianmackenzie.github.io/elm-3d-scene/examples/1.0.0/multiple-shadows.html), [HDR lighting](https://ianmackenzie.github.io/elm-3d-scene/examples/1.0.0/exposure-and-tone-mapping.html) and [physically based materials](https://ianmackenzie.github.io/elm-3d-scene/examples/1.0.0/textured-sphere.html). You can use `elm-3d-scene` to make: - Games - Animations - Visualizations - Scientific/engineering/technical apps and more! However, if you're a WebGL guru who's comfortable with writing their own shader programs, then `elm-3d-scene` might not (yet?) be for you - you're currently limited to the material and lighting types that `elm-3d-scene` supports directly. Eventually `elm-3d-scene` will likely support custom shaders in some way (see the [roadmap](#roadmap)), but it's not there yet. ## Getting started The best way to start learning the `elm-3d-scene` API is by reading through the [tutorial](https://github.com/ianmackenzie/elm-3d-scene/blob/master/TUTORIAL.md) and then checking out the [examples](https://github.com/ianmackenzie/elm-3d-scene/tree/master/examples/README.md). For more details on any type/function, the [reference documentation](https://package.elm-lang.org/packages/ianmackenzie/elm-3d-scene/latest/) is your friend.  One important point to understand is that `elm-3d-scene` builds heavily on several other packages, making extensive use of types and modules from: - [`avh4/elm-color`](https://package.elm-lang.org/packages/avh4/elm-color/latest/): `Color` - [`ianmackenzie/elm-3d-camera`](https://package.elm-lang.org/packages/ianmackenzie/elm-3d-camera/latest/): `Camera3d` and `Viewpoint3d` - [`ianmackenzie/elm-units`](https://package.elm-lang.org/packages/ianmackenzie/elm-units/latest/): `Quantity`, `Length`, `Meters`, `Angle`, `Pixels`, `Luminance`, `Illuminance`, `LuminousFlux` and `Temperature` - [`ianmackenzie/elm-triangular-mesh`](https://package.elm-lang.org/packages/ianmackenzie/elm-triangular-mesh/latest/): `TriangularMesh` - [`ianmackenzie/elm-geometry`](https://package.elm-lang.org/packages/ianmackenzie/elm-geometry/latest/): `Point3d`, `Vector3d`, `Direction3d`, `LineSegment3d`, `Triangle3d`, `Sphere3d`, `Block3d`, `Axis3d`...basically anything ending in `3d` other than `Camera3d` and `Viewpoint3d` =) As a result, to start using `elm-3d-scene` in your own project you will need at least a decent understanding of those packages as well. Check out their READMEs and reference documentation for details, but you can probably get a decent sense of how they work by checking out the [`elm-3d-scene` examples](https://github.com/ianmackenzie/elm-3d-scene/tree/master/examples/README.md). When installing `elm-3d-scene`, you'll also want to install the above packages: ```text elm install ianmackenzie/elm-3d-scene elm install avh4/elm-color elm install ianmackenzie/elm-3d-camera elm install ianmackenzie/elm-units elm install ianmackenzie/elm-triangular-mesh elm install ianmackenzie/elm-geometry ``` (All of the packages will get downloaded and installed automatically anyways, since they're dependencies of `elm-3d-scene`, but you'll need to install them explicitly in your own project so that you can use them directly.)  ## Climate action I would like for the projects I work on to be as helpful as possible in addressing the climate crisis. If - you are working on a project that helps address the climate crisis (clean energy, public transit, reforestation, sustainable agriculture etc.) either as an individual, as part of an non-profit organization or even as part of a for-profit company, and - there is a new feature you would find helpful for that work (or a bug you need fixed) in any of my open-source projects, then please [open a new issue](https://github.com/ianmackenzie/elm-3d-scene/issues), describe briefly what you're working on and I will treat that issue as high priority.  ## Roadmap `elm-3d-scene` has a decent number of features already, but there are many, many more to add. Check out the [issues](https://github.com/ianmackenzie/elm-3d-scene/issues) to get a sense of what features are planned (and add your own feature request if there's something you'd like to see!), but some of the immediate next steps will likely include: - Performance improvements (there are already some [improvements in the pipeline for `elm-explorations/webgl`](https://github.com/elm-explorations/webgl/pull/28) that will significantly improve `elm-3d-scene` performance) - [Support for loading different model formats](https://github.com/ianmackenzie/elm-3d-scene/issues/30) such as glTF and OBJ (likely in separate packages designed to work nicely with `elm-3d-scene`, instead of being part of `elm-3d-scene` itself) - Support for normal and ambient occlusion mapping (already mostly implemented internally) - [Improved line rendering](https://github.com/ianmackenzie/elm-3d-scene/issues/32) - [Silhouette edges/outlined meshes](https://github.com/ianmackenzie/elm-3d-scene/issues/26) - Some level of support for [transparent objects](https://github.com/ianmackenzie/elm-3d-scene/issues/4) like windows In the longer term, I hope to add support for: - Custom vertex and/or fragment shaders (for things like custom procedural texturing, fancy material types or deformable meshes) - Skeletal animation (rigging/skinning) However, these will require some significant API design and implementation work. ## Contributing Contributions are very welcome! Here are some ideas for some that would be very useful at this stage: - More examples to add to the `examples` directory, showing how to create specific kinds of scenes or how to integrate `elm-3d-scene` with other packages, such as: - An example combining `elm-3d-scene` and [`elm-gamepad`](https://package.elm-lang.org/packages/xarvh/elm-gamepad/latest/), perhaps using the gamepad to walk around a scene - An example with shadows cast from a moving light source (I think something like a point light flying in and amongst a bunch of cubes could look pretty cool) - Anything you think would look cool/illustrate part of the API missed by other examples/help others understand something you struggled with - Separate packages that parse different 3D model formats so they can be loaded into `elm-3d-scene`, such as [OBJ](https://en.wikipedia.org/wiki/Wavefront_.obj_file), [STL](https://en.wikipedi