Method init

packages/spine-plugin/src/SpineBatcher.js:31–86

* Initialize (or re-initialize) the batcher. * Settings are built here rather than in the constructor so the * renderer's context-restore recovery can re-create all GPU * resources with a bare `batcher.init(renderer)` call, matching * the engine's built-in batchers. * @param {WebGLRenderer

(renderer)

	 * @ignore
	 */
	init(renderer) {
		// create the official Spine two-color shader and extract its source
		const spineShader = Shader.newTwoColoredTextured(
			getManagedContext(renderer.getCanvas()),
		);
		const shaderSource = {
			vertex: spineShader.getVertexShaderSource(),
			fragment: spineShader.getFragmentSource(),
		};
		spineShader.dispose();

		// Spine vertex layout: a_position(2) + a_color(4) + a_texCoords(2) + a_color2(4)
		super.init(renderer, {
			attributes: [
				{
					name: Shader.POSITION,
					size: 2,
					type: renderer.gl.FLOAT,
					normalized: false,
					offset: 0 * Float32Array.BYTES_PER_ELEMENT,
				},
				{
					name: Shader.COLOR,
					size: 4,
					type: renderer.gl.FLOAT,
					normalized: false,
					offset: 2 * Float32Array.BYTES_PER_ELEMENT,
				},
				{
					name: Shader.TEXCOORDS,
					size: 2,
					type: renderer.gl.FLOAT,
					normalized: false,
					offset: 6 * Float32Array.BYTES_PER_ELEMENT,
				},
				{
					name: Shader.COLOR2,
					size: 4,
					type: renderer.gl.FLOAT,
					normalized: false,
					offset: 8 * Float32Array.BYTES_PER_ELEMENT,
				},
			],
			shader: shaderSource,
			maxVertices: 10920,
			indexed: true,
			projectionUniform: Shader.MVP_MATRIX,
		});

		/**
		 * the current texture bound to the batcher
		 * @type {object|null}
		 * @ignore
		 */
		this.lastTexture = null;
	}

	/**