Function createLines

stackgl_modules/index.js:12842–12895

(gl, bounds, ticks)

}

function createLines(gl, bounds, ticks) {
  var vertices    = []
  var tickOffset  = [0,0,0]
  var tickCount   = [0,0,0]

  //Create grid lines for each axis/direction
  var gridOffset = [0,0,0]
  var gridCount  = [0,0,0]

  //Add zero line
  vertices.push(
    0,0,1,   0,1,1,   0,0,-1,
    0,0,-1,  0,1,1,   0,1,-1)

  for(var i=0; i<3; ++i) {
    //Axis tick marks
    var start = ((vertices.length / 3)|0)
    for(var j=0; j<ticks[i].length; ++j) {
      var x = +ticks[i][j].x
      vertices.push(
        x,0,1,   x,1,1,   x,0,-1,
        x,0,-1,  x,1,1,   x,1,-1)
    }
    var end = ((vertices.length / 3)|0)
    tickOffset[i] = start
    tickCount[i]  = end - start

    //Grid lines
    var start = ((vertices.length / 3)|0)
    for(var k=0; k<ticks[i].length; ++k) {
      var x = +ticks[i][k].x
      vertices.push(
        x,0,1,   x,1,1,   x,0,-1,
        x,0,-1,  x,1,1,   x,1,-1)
    }
    var end = ((vertices.length / 3)|0)
    gridOffset[i] = start
    gridCount[i]  = end - start
  }

  //Create cube VAO
  var vertBuf = createBuffer(gl, new Float32Array(vertices))
  var vao = createVAO(gl, [
    { "buffer": vertBuf,
      "type": gl.FLOAT,
      "size": 3,
      "stride": 0,
      "offset": 0
    }
  ])
  var shader = createShader(gl)
  shader.attributes.position.location = 0
  return new Lines(gl, vertBuf, vao, shader, tickCount, tickOffset, gridCount, gridOffset)
}


/***/ }),