Plane constructor

Plane(OpenGLContextES gl, double width, double height)

Implementation

Plane(OpenGLContextES gl, double width, double height) {
  positions = [
    // Front face
    -1.0, -1.0, 1.0,
    1.0, -1.0, 1.0,
    1.0, 1.0, 1.0,
    -1.0, 1.0, 1.0,
  ];

  colors = [
    1.0, 1.0, 1.0, 1.0, // white
    1.0, 0.0, 0.0, 1.0, // red
    0.0, 1.0, 0.0, 1.0, // green
    0.0, 0.0, 1.0, 1.0, // blue
  ];

  textures = [
    // Front
    0.0, 0.0,
    1.0, 0.0,
    1.0, 1.0,
    0.0, 1.0,
  ];

  indices = [0, 1, 2, 0, 2, 3];

  var positionBuffer = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
  gl.bufferData(gl.ARRAY_BUFFER, Float32List.fromList(positions), gl.STATIC_DRAW);

  var colorBuffer = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, colorBuffer);
  gl.bufferData(gl.ARRAY_BUFFER, Float32List.fromList(colors), gl.STATIC_DRAW);

  var textureBuffer = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, textureBuffer);
  gl.bufferData(gl.ARRAY_BUFFER, Float32List.fromList(textures), gl.STATIC_DRAW);

  var indexBuffer = gl.createBuffer();
  gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer);
  gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, Uint16List.fromList(indices), gl.STATIC_DRAW);

  buffers['positionBuffer'] = positionBuffer;
  buffers['colorBuffer'] = colorBuffer;
  buffers['textureBuffer'] = textureBuffer;
  buffers['indexBuffer'] = indexBuffer;
}