createBuffer method

Map<String, dynamic> createBuffer(
  1. dynamic attribute,
  2. int bufferType, {
  3. String? name,
})

Implementation

Map<String, dynamic> createBuffer(var attribute, int bufferType,
    {String? name}) {
  final array = attribute.array;
  var usage = attribute.usage;

  // dynamic arrayType = attribute.runtimeType;
  // print(" WebGLAttributes.createBuffer attribute: ${attribute.runtimeType} arrayType: ${attribute.runtimeType} array: ${array.length} ${array.runtimeType} name: ${name} ");
  // print(array.toDartList());

  var type = gl.FLOAT;
  int bytesPerElement = 4;

  var buffer = gl.createBuffer();

  gl.bindBuffer(bufferType, buffer);

  gl.bufferData(bufferType, array.lengthInBytes, array, usage);

  if (attribute.onUploadCallback != null) {
    attribute.onUploadCallback!();
  }

  if (attribute is Float32BufferAttribute) {
    type = gl.FLOAT;
    bytesPerElement = Float32List.bytesPerElement;
  } else if (attribute is Float64BufferAttribute) {
    print(
        'THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.');
  } else if (attribute is Float16BufferAttribute) {
    if (isWebGL2) {
      bytesPerElement = 2;
      type = gl.HALF_FLOAT;
    } else {
      print(
          'THREE.WebGLAttributes: Usage of Float16BufferAttribute requires WebGL2.');
    }
  } else if (attribute is Uint16BufferAttribute) {
    bytesPerElement = Uint16List.bytesPerElement;
    type = gl.UNSIGNED_SHORT;
  } else if (attribute is Int16BufferAttribute) {
    bytesPerElement = Int16List.bytesPerElement;

    type = gl.SHORT;
  } else if (attribute is Uint32BufferAttribute) {
    bytesPerElement = Uint32List.bytesPerElement;

    type = gl.UNSIGNED_INT;
  } else if (attribute is Int32BufferAttribute) {
    bytesPerElement = Int32List.bytesPerElement;
    type = gl.INT;
  } else if (attribute is Int8BufferAttribute) {
    bytesPerElement = Int8List.bytesPerElement;
    type = gl.BYTE;
  } else if (attribute is Uint8BufferAttribute) {
    bytesPerElement = Uint8List.bytesPerElement;
    type = gl.UNSIGNED_BYTE;
  }

  final _v = {
    "buffer": buffer,
    "type": type,
    "bytesPerElement": bytesPerElement,
    "array": array,
    "version": attribute.version
  };

  return _v;
}