hexaworld-renderer-3d

Render hexaworld games using stack.gl. Composes with hexaworld-core to make a fully rendered and playable game.

install

Currently in development and not yet published to npm. To try it out, first git clone hexaworld-core and call

npm link

then git clone this repo and start a demo by calling

npm link hexaworld-core
npm start

example

First construct a game using hexaworld-core, which just requires a valid level schema and controller.

var controller = require('crtrdg-keyboard')()
var core = require('hexaworld-core')

var game = core({schema: schema, controller: controller})

then create the hexaworld 3d renderer

var renderer = require('hexaworld-renderer-3d')({game: game, gl: gl})

when you start the game the rendering will begin.

game.start()

inputs

game

A valid hexaworld-core game. The renderer uses game.objects, which is a list of all objects defined by the game, each of which has type, id, points, and transform. It also uses the events exposed by the game.

gl

A webgl context.

components

This renderer is composed from two primary components.

view

(NOTE: this is mainly for debugging purposes and can be dropped in the future)

Simple wrapper for different stack.gl cameras.

• view.type Type of camera.

• view.camera The camera itself.

scene

(NOTE: this is very general and might make one or more nice standalone stack.gl modules)

Builds a collection of stack.gl geometries and light sources from a list of objects, and enables updating them (through events like remove and move) and drawing them to the gl context.

To initialize a scene, just pass a gl context.

var scene = Scene(gl)

methods

• scene.build(objects, styles) Build a scene from a list of objects and styles. Every object in the list should have the following attributes:

{
	id: 'string',
	type: 'string',
	points: [[x, y], [x, y], ...]
	transform: {translation: [x, y], scale: s, rotation: r}
}

And styles should map types to properties, in the form:

{
	shapes: {type0: {}, type1: {},	...},
	lights: {type0: {}, type1: {},	...}
}

• scene.update(view) Update rendering matrices using the provided view.

• scene.draw() Draw the scene.

• scene.move(id, transform) Move the geometry with the given id using the given transform.

• scene.remove(id) Remove the geometry with the given id from the scene.

• scene.find(id) Return the geometry with the given id.

styling

When building a scene, the following styles can be used to easily set attributes on all rendered geometries.

shapes

Schema for shape attributes, e.g.

color: [0.1, 0.4, 0.2] // material color
lit: true, // whether to apply lights
fog: true, // whether to apply fog
hide: true, // whether to hide
render: true, // whether to render
mergeable: true, // whether geometries of this type can be combined
shader: 'flat', // which shader to use
generator: {type: 'extrude', bottom: 0, height: 45} // how to construct 3d geometry from point(s)

lights

Schema for light attributes

color: [0.9, 0.1, 0.5] // light color
height: 50 // height of light