public void BindTexturesAndSamplers()
{
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, _diffuse);
Samplers.BindFramebufferTextureSampler(0);
GL.ActiveTexture(TextureUnit.Texture1);
GL.BindTexture(TextureTarget.Texture2D, _normal);
Samplers.BindFramebufferTextureSampler(1);
GL.ActiveTexture(TextureUnit.Texture2);
GL.BindTexture(TextureTarget.Texture2D, _depth);
Samplers.BindFramebufferTextureSampler(2);
}
private static void DrawGeometryFramebuffer(WorldServer world, Camera camera, Matrix4 projection, Frustum viewFrustum)
{
var chunksToDraw = new List <Chunk>(1024);
var transparentSortedChunks = new List <Chunk>(1024);
var transparentChunks = new List <Chunk>(1024);
foreach (var entry in world.LoadedChunks)
{
//Check if chunk is in player view frustum
var chunkMiddle = (entry.Key * Chunk.Size + new Vector3i(Chunk.Size / 2)).ToVector3();
if (!viewFrustum.SpehereIntersection(chunkMiddle, Chunk.Radius))
{
continue;
}
var lengthSq = (camera.Position - chunkMiddle).LengthSquared;
if (lengthSq > RenderDistanceSq)
{
continue;
}
if (entry.Value.HasTransparency)
{
if (lengthSq < SortDistanceSq)
{
entry.Value.SortTransparentFaces();
transparentSortedChunks.Add(entry.Value);
}
else
{
transparentChunks.Add(entry.Value);
}
}
else
{
chunksToDraw.Add(entry.Value);
}
}
//Sort transparent chunks and append to draw list
var cameraPos = camera.Position;
transparentSortedChunks.Sort((chunk1, chunk2)
=> (int)((cameraPos - chunk2.Middle).LengthSquared * 1000 -
(cameraPos - chunk1.Middle).LengthSquared * 1000));
transparentChunks.AddRange(transparentSortedChunks);
chunksToDraw.AddRange(transparentChunks);
GL.Enable(EnableCap.CullFace);
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(DepthFunction.Lequal); //Grass fix
ClientResources.GeometryFramebuffer.Bind();
ClientResources.GeometryFramebuffer.Clear(Color4.DarkBlue);
//ClientResources.GeometryFramebuffer.Clear(Color4.Transparent); Breaks transparency
ClientResources.WorldGeometryShader.Bind();
GL.UniformMatrix4(4, false, ref camera.View);
GL.UniformMatrix4(8, false, ref projection);
GL.Uniform1(12, 1);
BlockTextureManager.Bind();
Samplers.BindBlockTextureSampler();
//Draw opaque blocks front to back
foreach (var chunk in chunksToDraw)
{
var worldMat = Matrix4.CreateTranslation(chunk.Position.X * Chunk.Size, chunk.Position.Y * Chunk.Size,
chunk.Position.Z * Chunk.Size);
GL.UniformMatrix4(0, false, ref worldMat);
chunk.Draw();
}
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Uniform1(12, 0);
//Draw transparent blocks back to front
foreach (var chunk in transparentChunks)
{
var worldMat = Matrix4.CreateTranslation(chunk.Position.X * Chunk.Size, chunk.Position.Y * Chunk.Size,
chunk.Position.Z * Chunk.Size);
GL.UniformMatrix4(0, false, ref worldMat);
chunk.DrawTransparent();
}
GL.Disable(EnableCap.Blend);
//TODO: Entities
PlayerController.Render(camera, projection);
ClientResources.GeometryFramebuffer.Unbind(ClientResources.Window.Width, ClientResources.Window.Height);
}