Question

g Suppose the vertex data is stored in an array named verts and each vertex uses a list to store the coordinates. Write the code that will allocate a buffer in the GPU and store the data into that buffer. Use gl as the WebGL graphics object.

Answer 1

Answer:

function createAndFillBufferObject(gl, data) {

 var buffer_id;

 // Create a buffer object

 buffer_id = gl.createBuffer();

 if (!buffer_id) {

   out.displayError('Failed to create the buffer object for ' + model_name);

   return null;

 }

 // Make the buffer object the active buffer.

 gl.bindBuffer(gl.ARRAY_BUFFER, buffer_id);

 // Upload the data for this buffer object to the GPU.

 gl.bufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW);

 return buffer_id;

}