WebGL additional features

I2Djs webGL layer is for high scale performance rendering. I2Djs provides an intuitive API to render elements on large scale. However, WebGL Layer API has a minor deviation in terms of element creation, for performance reason.

To render any geometrical element, we need to load the respective shader. So for that reason, we create a shader group of the respective 'shaderType' and then create elements under it. For example, to create rectangles, we need to create 'rect' shader group and then add rect elements.

Code block to create rects.

let rectGroup = webGlLayerInstance.createEl({
					el: 'group',
					attr: {
						shaderType: 'rect'
					}
				}).createEl({
					el: 'rect':
					attr: {
						x: 100,
						y: 100,
						width: 250,
						height: 250
					},
					style: {
						fill: 'hsl(35%, 100%, 0%)';
					}
				});

Shapes Supported:

I2Djs WebGL has a pseudo-DOM implementation for most of the geometrical primitives. In addition, it provides a way to define the custom shaders and the way to feed the data to the attributes, uniforms, textures.

Below is the list of built-in elements.

Element	ShaderType	attributes	Style
rect	Rect	x, y, width, height	fill
point	point	x, y, size	fill
line	line	x1, y1, x2, y2	stroke
circle	circle	cx, cy, r	fill
polyline	polyline	d	stroke
polygon	polygon	d	fill
image	image	x, y, width, height

Custom Elements:

Sometimes there may be a need to create custom elements/effects, which are not included in the built-in options. To create custom elements, I2Djs provides an easy API to create custom shaders with the inbuild geometrical API.

Custom Shaders:

Events:

Work in progress