Method createTexture

showcases/wind/src/layers/wind-layer/wind-layer.js:183–201

(gl, opt)

  }

  createTexture(gl, opt) {
    const textureOptions = Object.assign(
      {
        format: gl.RGBA32F,
        dataFormat: gl.RGBA,
        type: gl.FLOAT,
        parameters: {
          [gl.TEXTURE_MAG_FILTER]: gl.NEAREST,
          [gl.TEXTURE_MIN_FILTER]: gl.NEAREST,
          [gl.TEXTURE_WRAP_S]: gl.CLAMP_TO_EDGE,
          [gl.TEXTURE_WRAP_T]: gl.CLAMP_TO_EDGE
        },
        pixelStore: {[gl.UNPACK_FLIP_Y_WEBGL]: true}
      },
      opt
    );

    return new Texture2D(gl, textureOptions);
  }

  calculatePositions({nx, ny, bbox}) {
    const diffX = bbox.maxLng - bbox.minLng;