Пример #1
0
        public EffectLayout CreateEffectLayout(IMgDevice device)
        {
            var pDsCreateInfo = new MgDescriptorSetLayoutCreateInfo
            {
                Bindings = new[]
                {
                    // WORLD DATA
                    // CAMERAS
                    // LIGHTS
                    new MgDescriptorSetLayoutBinding
                    {
                        Binding         = 0,
                        DescriptorType  = MgDescriptorType.UNIFORM_BUFFER,
                        DescriptorCount = 1,
                        StageFlags      = MgShaderStageFlagBits.VERTEX_BIT,
                    },
                    // MATERIALS
                    new MgDescriptorSetLayoutBinding
                    {
                        Binding         = 1,
                        DescriptorType  = MgDescriptorType.UNIFORM_BUFFER,
                        DescriptorCount = mSettings.NoOfMaterialsPerGroup,
                        StageFlags      = MgShaderStageFlagBits.FRAGMENT_BIT,
                    },
                    // TEXTURES
                    new MgDescriptorSetLayoutBinding
                    {
                        Binding         = 5,
                        DescriptorType  = MgDescriptorType.COMBINED_IMAGE_SAMPLER,
                        DescriptorCount = mSettings.NoOfTexturesPerGroup,
                        StageFlags      = MgShaderStageFlagBits.FRAGMENT_BIT,
                    },
                }
            };

            var err = device.CreateDescriptorSetLayout(pDsCreateInfo, null, out IMgDescriptorSetLayout dsLayout);

            if (err != Result.SUCCESS)
            {
                throw new InvalidOperationException("CreateDescriptorSetLayout failed");
            }

            var pCreateInfo = new MgPipelineLayoutCreateInfo
            {
                SetLayouts = new[]
                {
                    dsLayout,
                }
            };

            err = device.CreatePipelineLayout(pCreateInfo, null, out IMgPipelineLayout layout);
            if (err != Result.SUCCESS)
            {
                throw new InvalidOperationException("CreatePipelineLayout failed");
            }

            return(new EffectLayout(dsLayout, layout));
        }
Пример #2
0
        public GltfScene Load(IMgDevice device, IMgEffectFramework framework, string modelFilePath)
        {
            var model   = Interface.LoadModel(modelFilePath);
            var baseDir = Path.GetDirectoryName(modelFilePath);

            var buffers = ExtractBuffers(model, baseDir);

            var request = new MgStorageBlockAllocationRequest();

            const int MAX_NO_OF_CAMERAS    = 1;
            var       cameraAllocationInfo = new GltfBucketAllocationInfo <CameraUBO>
            {
                BucketSize          = MAX_NO_OF_CAMERAS,
                Usage               = MgBufferUsageFlagBits.UNIFORM_BUFFER_BIT,
                MemoryPropertyFlags = MgMemoryPropertyFlagBits.HOST_VISIBLE_BIT,
            };

            var cameraSlots = cameraAllocationInfo.Prepare(model.Cameras != null ? model.Cameras.Length : 0, request);

            var accessors = ExtractAccessors(model);

            var bufferViews = ExtractBufferViews(model);

            const int MAX_NO_OF_MATERIALS = 16;

            var materialAllocationInfo = new GltfBucketAllocationInfo <MaterialUBO>
            {
                BucketSize          = MAX_NO_OF_MATERIALS,
                Usage               = MgBufferUsageFlagBits.UNIFORM_BUFFER_BIT,
                MemoryPropertyFlags = MgMemoryPropertyFlagBits.HOST_VISIBLE_BIT,
            };

            var images = ExtractImages(baseDir, model.Images, bufferViews, buffers);

            var samplers = ExtractSamplers(device, model.Samplers);

            const int MAX_NO_OF_LIGHTS = 4;

            const int MAX_NO_OF_TEXTURES = 16;
            // var textures = AllocateTextures(MAX_NO_OF_TEXTURES, model.Textures, images);

            var materialSlots = materialAllocationInfo.Prepare(model.Materials != null ? model.Materials.Length : 0, request);

            var materialChunks = ExtractMaterials(materialSlots.BucketSize, model.Materials);

            var meshes = ExtractMeshes(model, accessors, materialSlots);

            PadMeshes(meshes);

            var meshLocations = AllocateMeshes(request, meshes, accessors, bufferViews);

            var nodes = ExtractNodes(model, cameraSlots);

            var pDsCreateInfo = new MgDescriptorSetLayoutCreateInfo
            {
                Bindings = new[]
                {
                    // CAMERA
                    new MgDescriptorSetLayoutBinding
                    {
                        Binding         = 0,
                        DescriptorType  = MgDescriptorType.UNIFORM_BUFFER,
                        DescriptorCount = MAX_NO_OF_CAMERAS,
                        StageFlags      = MgShaderStageFlagBits.VERTEX_BIT,
                    },
                    // LIGHTS
                    new MgDescriptorSetLayoutBinding
                    {
                        Binding         = 1,
                        DescriptorType  = MgDescriptorType.UNIFORM_BUFFER,
                        DescriptorCount = MAX_NO_OF_LIGHTS,
                        StageFlags      = MgShaderStageFlagBits.VERTEX_BIT,
                    },
                    // MATERIALS
                    new MgDescriptorSetLayoutBinding
                    {
                        Binding         = 2,
                        DescriptorType  = MgDescriptorType.UNIFORM_BUFFER,
                        DescriptorCount = MAX_NO_OF_MATERIALS,
                        StageFlags      = MgShaderStageFlagBits.FRAGMENT_BIT,
                    },
                    // TEXTURES
                    new MgDescriptorSetLayoutBinding
                    {
                        Binding         = 3,
                        DescriptorType  = MgDescriptorType.COMBINED_IMAGE_SAMPLER,
                        DescriptorCount = MAX_NO_OF_TEXTURES,
                        StageFlags      = MgShaderStageFlagBits.FRAGMENT_BIT,
                    },
                }
            };

            var err = device.CreateDescriptorSetLayout(pDsCreateInfo, null, out IMgDescriptorSetLayout dsLayout);

            if (err != Result.SUCCESS)
            {
                throw new InvalidOperationException("CreatePipelineLayout failed");
            }

            var pCreateInfo = new MgPipelineLayoutCreateInfo
            {
                SetLayouts = new[]
                {
                    dsLayout,
                }
            };

            err = device.CreatePipelineLayout(pCreateInfo, null, out IMgPipelineLayout layout);
            if (err != Result.SUCCESS)
            {
                throw new InvalidOperationException("CreatePipelineLayout failed");
            }

            var pbrEffect  = new EffectPipelineDictionary();
            var pbrFactory = new PbrEffectVariantFactory(mPbrEffectPath);

            var instanceDrawGroups = new Dictionary <GltfInstancedGroupKey, GltfInstanceDrawGroup>();

            foreach (var node in nodes)
            {
                if (node.Mesh.HasValue)
                {
                    var options = new EffectVariantOptions
                    {
                    };

                    var meshIndex = node.Mesh.Value;
                    var mesh      = meshes[meshIndex];

                    options.FrontFace =
                        node.IsMirrored
                        ? MgFrontFace.CLOCKWISE
                        : MgFrontFace.COUNTER_CLOCKWISE;

                    foreach (var primitive in mesh.Primitives)
                    {
                        options.Topology = primitive.Topology;

                        var materialItem = materialChunks[primitive.Material.BucketIndex].Items[primitive.Material.Offset];

                        options.CullMode =
                            materialItem.DoubleSided
                            ? MgCullModeFlagBits.NONE
                            : MgCullModeFlagBits.BACK_BIT;

                        var key = new EffectVariantKey
                        {
                            Definition = PerVertexDefinitionEncoder.Encode(primitive.FinalDefinition),
                            Options    = EffectVariantEncoder.Encode(options),
                        };

                        if (!pbrEffect.TryGetValue(key, out EffectVariant found))
                        {
                            var vertexInput = new PerVertexInputPipelineState(primitive.FinalDefinition);
                            found = pbrFactory.Initialize(device, layout, framework.Renderpass, vertexInput, options);

                            pbrEffect.Add(key, found);
                        }

                        AppendToGroup(instanceDrawGroups, node, meshIndex, primitive, key, found);
                    }
                }
            }

            var stride = Marshal.SizeOf(typeof(PerInstance));

            var perInstances = new List <GltfInstanceRenderGroup>();

            foreach (var group in instanceDrawGroups.Values)
            {
                var slotInfo = new MgStorageBlockAllocationInfo
                {
                    MemoryPropertyFlags = MgMemoryPropertyFlagBits.HOST_VISIBLE_BIT,
                    Usage           = MgBufferUsageFlagBits.VERTEX_BUFFER_BIT,
                    ElementByteSize = (uint)stride,
                    Size            = (ulong)(group.Members.Count * stride),
                };

                var instanceGroup = new GltfInstanceRenderGroup
                {
                    Variant      = group.Variant,
                    StorageIndex = request.Insert(slotInfo),
                    Members      = group.Members.ToArray(),
                };
                perInstances.Add(instanceGroup);
            }

            var storage = mBuilder.Build(
                new MgOptimizedStorageCreateInfo
            {
                Allocations = request.ToArray()
            }
                );

            // MAP DATA

            var finalMaterials = new List <GltfMaterialInfo>();

            for (var i = 0; i < materialChunks.Length; i += 1)
            {
                var slot  = materialSlots.Slots[i];
                var chunk = materialChunks[i];
                for (var j = 0; j < chunk.Items.Length; j += 1)
                {
                    var values = chunk.Items[j];
                    var mat    = new GltfMaterialInfo
                    {
                        StorageIndex = slot,

                        BucketIndex = i,
                        SetOffset   = j,
                        Values      = values,
                    };
                }
            }

            return(new GltfScene
            {
                //Cameras = new []
                //{

                //},
                DescriptorSets = new IMgDescriptorSet[]
                {
                },
                Effects = new []
                {
                    new Effect
                    {
                        DescriptorSetLayout = dsLayout,
                        Layout = layout,
                        Variants = pbrEffect,
                    }
                },
                //Meshes = new[]
                //{

                //},
                Materials = finalMaterials.ToArray(),
                //Nodes = new []
                //{

                //},
                PerInstances = perInstances.ToArray(),
                Samplers = samplers,
                Storage = storage,
                //Textures = new []
                //{

                //},
            });
        }