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https://github.com/simerplaha/slack3d
Simple 3D graphics library
https://github.com/simerplaha/slack3d
3d graphics linear-algebra scala
Last synced: about 2 months ago
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Simple 3D graphics library
- Host: GitHub
- URL: https://github.com/simerplaha/slack3d
- Owner: simerplaha
- License: apache-2.0
- Created: 2021-10-11T14:11:52.000Z (about 3 years ago)
- Default Branch: master
- Last Pushed: 2023-05-08T12:54:19.000Z (over 1 year ago)
- Last Synced: 2024-05-01T14:44:03.836Z (8 months ago)
- Topics: 3d, graphics, linear-algebra, scala
- Language: Scala
- Homepage: https://simerplaha.github.io/Slack3D
- Size: 7.25 MB
- Stars: 30
- Watchers: 5
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
# Slack3D [![Maven central][maven-badge]][maven-link]
[gitter-badge]: https://badges.gitter.im/Join%20Chat.svg
[gitter-link]: https://gitter.im/Slack3D/community
[maven-badge]: https://img.shields.io/maven-central/v/com.github.simerplaha/slack3d_2.13.svg
[maven-link]: https://search.maven.org/search?q=g:com.github.simerplaha%20AND%20a:slack3d_2.13
Simple 3D graphics engine.
# Features
- Phong lighting
- Fly style camera - Freely move around a 3D scene
- Text rendering - English characters and numbers.
- Out of the box Shapes - Vector, Box, Circle, Cone, Cylinder, HeightField, Plane, Point, Pyramid, Sphere, Tetrahedron,
Triangle, Line & Ray
- OpenGL via LWJGL3
- User input to transform and rotate shapes.
- Basic linear algebra library - `Matrix3`, `Matrix2`, `Vector3` & `Vector2`
- Immutable API
## Key controls
- W, A, S, D - Move along all 3 axes
- Mouse drag - Changes camera view position
- Enter - Return to initial camera view
- Space (Hold!) - Pauses rendering/animation (camera is still active)
## Setup
```scala
libraryDependencies += "com.github.simerplaha" %% "slack3d" % "0.1.0"
```
### LWJGL VM Option
Allow LWJGL to run on main thread with `-XstartOnFirstThread` in VM options. If you are using IntelliJ set the flag in
the "Build and run" window.
## Rendering
Slack3D can be thought of a collection instance where your code provide shapes to render for each frame.
Render a sphere of radius `0.5` of colour `Purple`.
```scala
Slack3D("A sphere") foreach {
state => //State of current render
//shapes to render
Seq(Sphere(radius = 0.5, colour = Colour.Purple))
}
```
## Interval rendering
Render shapes after some time interval. The following will render a `Sphere` of radius `0.5` with a new colour after
every 1.second.
```scala
Slack3D("Colour").foreach(interval = 1.second) {
_ =>
Seq(Sphere(0.5, colour = Colour.next()))
}
```
All OpenGL colours can be found class type [Colour](/graphics/src/main/scala/slack3d/graphics/colour/Colour.scala). To
get the next colour from a randomly sorted colour queue use```Colour.next()```
## Rotation
Apply Y axis rotation to the box.
```scala
Slack3D("Rotating Box") foreach {
state =>
//same code as above but with added rotation at Y axis
val box = Box(Colour.Red).rotateY(state.getTime() * 30)
Seq(box)
}
```
Rotation can be applied to all axis. See APIs
## Rotation with user inputs
Configures the `Box` to be
- **translatable** when `Z` key is pressed and arrows keys are moved
- **rotatable** when `X` key is pressed and arrows keys are moved
```scala
Slack3D("Custom rotation").foldLeft(Box()) {
case (_box, state) =>
val box =
_box
.translatable(state.window, GLFW.GLFW_KEY_Z) //translate box when Z key is pressed
.rotatable(state.window, GLFW.GLFW_KEY_X) //rotate box when X key is pressed
(box, Seq(box))
}
```
## Lines/Vectors
Create 2 vectors where the third vector is a cross product.
```scala
Slack3D("Lines and vectors") foreach {
state =>
//vector1
val vector1 = Vector3(0.5, -0.5, 0)
//vector2
val vector2 = Vector3(0.5, 0.5, 0)
//cross product
val cross = vector1 cross vector2
Seq(
Line(vector1, Colour.Red),
Line(vector2, Colour.Yellow),
Line(cross, Colour.Green)
)
}
```
All `Lines` and `Points` will render a text displaying the position and length of that vector.
## Configurations
You can change the width, height, title, camera etc. See the following example.
```scala
Slack3D(
title = "My configurations", //window title
width = 800, //window width
height = 600, //window height
backgroundColor = Colour.Orange,
enableWireframes = true, //configures OpenGL in wireframes mode.
camera = None, // disable camera or provide your custom instance. See how default works
enable2DCoordinates = false, //enables or disables coordinate drawing
perspective = None, //perspective view
light = None //configures lighting
) foreach {
state =>
//no shapes to render
Seq.empty
}
```
## Custom shapes
All shapes are a combination of primitives `Triangle`, `Line` or a `Point`.
```scala
/**
* A custom shape that render text and a line
*/
case class MyCustomShape(text: Text,
line: Cylinder) extends Shape {
override type Self = MyCustomShape
//function to apply to each vector on this shape.
//this function is used for applying perspective, rotation & translation
override def map(f: Vector3[Double] => Vector3[Double]): MyCustomShape =
MyCustomShape(
text = text.map(f),
line = line.map(f)
)
//expands each shape into points, lines and triangles
override def buildMesh(mesh: Mesh[Point, LineOrRay, Triangle]): Unit = {
text buildMesh mesh
line buildMesh mesh
}
}
//Start Slack3D instance and render the above custom shape
Slack3D("My custom shape") foreach {
state =>
//create my custom shape instance
val myShape =
MyCustomShape(
text = Text("My custom shape text", Colour.White) * 2 + Vector3(-0.6, 0.4), //a scaled & translated custom text
line = Cylinder(Colour.Purple) / 2 //A scaled down cylinder
)
Seq(myShape)
}
```
# Sponsors
Thank you Jetbrains for providing an open-source licence for their awesome development tools.
