FSO.LotView.Components.TerrainComponent.Draw C# (CSharp) Method

        public override void Draw(GraphicsDevice device, WorldState world)
        {
            if (VertexBuffer == null) return;
            PPXDepthEngine.RenderPPXDepth(Effect, true, (depthMode) =>
            {
                Effect.Parameters["LightGreen"].SetValue(LightGreen.ToVector4());
                Effect.Parameters["DarkGreen"].SetValue(DarkGreen.ToVector4());
                Effect.Parameters["DarkBrown"].SetValue(DarkBrown.ToVector4());
                Effect.Parameters["LightBrown"].SetValue(LightBrown.ToVector4());
                Effect.Parameters["ScreenSize"].SetValue(new Vector2(device.Viewport.Width, device.Viewport.Height));
                //Effect.Parameters["depthOutMode"].SetValue(DepthMode && (!FSOEnvironment.UseMRT));

                var offset = -world.WorldSpace.GetScreenOffset();

                world._3D.ApplyCamera(Effect);
                var worldmat = Matrix.Identity * Matrix.CreateTranslation(0, ((world.Zoom == WorldZoom.Far) ? -5 : ((world.Zoom == WorldZoom.Medium) ? -4 : -3)) * (20 / 522f), 0);
                Effect.Parameters["World"].SetValue(worldmat);

                Effect.Parameters["DiffuseColor"].SetValue(new Vector4(world.OutsideColor.R / 255f, world.OutsideColor.G / 255f, world.OutsideColor.B / 255f, 1.0f));

                device.SetVertexBuffer(VertexBuffer);
                device.Indices = IndexBuffer;

                Effect.CurrentTechnique = Effect.Techniques["DrawBase"];
                foreach (var pass in Effect.CurrentTechnique.Passes)
                {
                    pass.Apply();
                    device.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, NumPrimitives);
                }

                int grassScale;
                float grassDensity;
                switch (world.Zoom)
                {
                    case WorldZoom.Far:
                        grassScale = 4;
                        grassDensity = 0.56f;
                        break;
                    case WorldZoom.Medium:
                        grassScale = 2;
                        grassDensity = 0.50f;
                        break;
                    default:
                        grassScale = 1;
                        grassDensity = 0.43f;
                        break;
                }

                grassDensity *= GrassDensityScale;

                if (BladePrimitives > 0)
                {
                    Effect.CurrentTechnique = Effect.Techniques["DrawBlades"];
                    int grassNum = (int)Math.Ceiling(GrassHeight / (float)grassScale);

                    //if (depthMode && (!FSOEnvironment.UseMRT)) return;
                    RenderTargetBinding[] rts = null;
                    if (FSOEnvironment.UseMRT)
                    {
                        rts = device.GetRenderTargets();
                        if (rts.Length > 1)
                        {
                            device.SetRenderTarget((RenderTarget2D)rts[0].RenderTarget);
                        }
                    }
                    device.Indices = BladeIndexBuffer;
                    for (int i = 0; i < grassNum; i++)
                    {
                        Effect.Parameters["World"].SetValue(Matrix.Identity * Matrix.CreateTranslation(0, i * (20 / 522f) * grassScale, 0));
                        Effect.Parameters["GrassProb"].SetValue(grassDensity * ((grassNum - (i / (2f * grassNum))) / (float)grassNum));
                        offset += new Vector2(0, 1);
                        Effect.Parameters["ScreenOffset"].SetValue(offset);

                        foreach (var pass in Effect.CurrentTechnique.Passes)
                        {
                            pass.Apply();
                            device.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, BladePrimitives);
                        }
                    }
                    if (FSOEnvironment.UseMRT)
                    {
                        device.SetRenderTargets(rts);
                    }
                }
            });
        }