public OctreeRenderer(OctreeModel model, OpenGL gl)
{
_gl = gl;
_octreeProgram = new OctreeShader(gl);
_cubes = new VAO(gl);
_cubeBuffer = new VBO(gl);
var filled = model.Node.Flatten().Where(o => o.State == NodeState.Filled).ToArray();
_count = filled.Length;
var list = new List <float>();
foreach (var octreeNode in filled)
{
list.AddRange(octreeNode.Center.ToArray().Select(d => (float)d));
list.AddRange(new[]
{
(float)MathsHelper.Map(octreeNode.Color.R, 0, 255, 0, 1),
(float)MathsHelper.Map(octreeNode.Color.G, 0, 255, 0, 1),
(float)MathsHelper.Map(octreeNode.Color.B, 0, 255, 0, 1),
(float)MathsHelper.Map(octreeNode.Color.A, 0, 255, 0, 1),
(float)octreeNode.Size
});
}
var vertices = list.ToArray();
using (new Bind(_cubes))
using (new Bind(_cubeBuffer))
{
_cubeBuffer.Update(vertices, vertices.Length * sizeof(float));
const int stride = sizeof(float) * 8;
gl.EnableVertexAttribArray(0);
gl.VertexAttribPointer(0, 3, OpenGL.GL_FLOAT, false, stride, new IntPtr(0));
gl.EnableVertexAttribArray(1);
gl.VertexAttribPointer(1, 4, OpenGL.GL_FLOAT, false, stride, new IntPtr(sizeof(float) * 3));
gl.EnableVertexAttribArray(2);
gl.VertexAttribPointer(2, 1, OpenGL.GL_FLOAT, false, stride, new IntPtr(sizeof(float) * 7));
gl.BindVertexArray(0);
}
}