private static List <MgVertexInputAttributeDescription> ExtractAttributeDescriptions(MgOptimizedStorageContainer container, List <GltfMeshAccessor> accessors)
{
const MgBufferUsageFlagBits VERT_MASK = MgBufferUsageFlagBits.VERTEX_BUFFER_BIT;
var inputAttributes = new List <MgVertexInputAttributeDescription>();
for (var i = 0; i < accessors.Count; i += 1)
{
var srcAttribute = accessors[i];
var dstAttribute = container.Map.Allocations[i];
if ((dstAttribute.Usage & VERT_MASK) == VERT_MASK)
{
var attribute = new MgVertexInputAttributeDescription
{
Location = srcAttribute.LocationIndex,
Binding = dstAttribute.BlockIndex,
Format = srcAttribute.Format,
Offset = (uint)dstAttribute.Offset,
};
inputAttributes.Add(attribute);
}
}
return(inputAttributes);
}
private static void IncludePerInstanceAttributes(List <MgVertexInputAttributeDescription> attributes)
{
{
var attribute = new MgVertexInputAttributeDescription
{
Binding = 1U,
Format = MgFormat.R32G32B32_SFLOAT,
Location = 11,
Offset = (uint)Marshal.OffsetOf <PerInstance>("Translation"),
};
attributes.Add(attribute);
}
{
var attribute = new MgVertexInputAttributeDescription
{
Binding = 1U,
Format = MgFormat.R32G32B32_SFLOAT,
Location = 12,
Offset = (uint)Marshal.OffsetOf(typeof(PerInstance), "Scale"),
};
attributes.Add(attribute);
}
{
var attribute = new MgVertexInputAttributeDescription
{
Binding = 1U,
Format = MgFormat.R32G32B32A32_SFLOAT,
Location = 13,
Offset = (uint)Marshal.OffsetOf(typeof(PerInstance), "Rotation"),
};
attributes.Add(attribute);
}
{
var attribute = new MgVertexInputAttributeDescription
{
Binding = 1U,
Format = MgFormat.R32_SINT,
Location = 14,
Offset = (uint)Marshal.OffsetOf(typeof(PerInstance), "CameraIndex"),
};
attributes.Add(attribute);
}
{
var attribute = new MgVertexInputAttributeDescription
{
Binding = 1U,
Format = MgFormat.R32_SINT,
Location = 15,
Offset = (uint)Marshal.OffsetOf(typeof(PerInstance), "MaterialIndex"),
};
attributes.Add(attribute);
}
}
void InitPipeline()
{
MgOptimizedMesh mesh = null;
// LOOK LIKE IT IS WILL BE EASIER TO GET THIS INFO FROM GLTF MODEL FILE
var attributes = new List <MgVertexInputAttributeDescription>();
var firstBinding = 0U;
foreach (var attr in mesh.Allocations)
{
var elem = new MgVertexInputAttributeDescription
{
Location = attr.Index, // FIXED
Binding = firstBinding + attr.BlockIndex,
Format = MgFormat.UNDEFINED, // NEED
Offset = (uint)attr.ByteOffset,
};
attributes.Add(elem);
}
var bindings = new List <MgVertexInputBindingDescription>();
for (var i = 0U; i < mesh.Instances.Length; i += 1)
{
var current = mesh.Instances[i];
var stride = 0U;
foreach (var attrIndex in current.PackingOrder)
{
var attr = mesh.Allocations[attrIndex];
// BUFFERVIEW IS A BETTER MATCH
if ((attr.Usage & MgBufferUsageFlagBits.VERTEX_BUFFER_BIT) == MgBufferUsageFlagBits.VERTEX_BUFFER_BIT)
{
// ELEMENT COUNT
stride += 0U;
}
}
var elem = new MgVertexInputBindingDescription
{
Binding = firstBinding + i,
InputRate = MgVertexInputRate.VERTEX,
Stride = stride,
};
bindings.Add(elem);
}
IMgDevice device = null;
IMgPipeline[] pPipelines;
var pCreateInfos = new[] {
new MgGraphicsPipelineCreateInfo {
InputAssemblyState = new MgPipelineInputAssemblyStateCreateInfo
{
Topology = MgPrimitiveTopology.TRIANGLE_LIST,
},
VertexInputState = new MgPipelineVertexInputStateCreateInfo
{
VertexBindingDescriptions = bindings.ToArray(),
VertexAttributeDescriptions = attributes.ToArray(),
}
}
};
device.CreateGraphicsPipelines(null, pCreateInfos, null, out pPipelines);
}
private MgPipelineVertexInputStateCreateInfo GenerateVertexInputState(PerVertexDefinition definition)
{
PerVertexStrideInfo[] strides = new PerVertexStrideInfo[]
{
GetPositionStride(definition.Position), // 0
GetNormalStride(definition.Normal), // 1
GetTangentStride(definition.Tangent), // 2
GetTexCoordsStride(definition.TexCoords0), // 3
GetTexCoordsStride(definition.TexCoords1), // 4
GetColorStride(definition.Color0), // 5
GetJointsStride(definition.Joints0), // 6
GetWeightsStride(definition.Weights0), // 7
GetColorStride(definition.Color1), // 8
GetJointsStride(definition.Joints1), // 9
GetWeightsStride(definition.Weights1), // 10
};
var attributes = new List <MgVertexInputAttributeDescription>();
var perVertexStride = 0U;
var location = 0U;
foreach (var stride in strides)
{
if (stride.Range > 0)
{
var attribute = new MgVertexInputAttributeDescription
{
Binding = 0U,
Format = stride.Format,
Location = location,
Offset = perVertexStride,
};
location += 1;
attributes.Add(attribute);
}
perVertexStride += stride.Range;
}
var perInstanceStride = (uint)Marshal.SizeOf(typeof(PerInstance));
IncludePerInstanceAttributes(attributes);
return(new MgPipelineVertexInputStateCreateInfo
{
VertexBindingDescriptions = new[]
{
new MgVertexInputBindingDescription
{
Binding = 0U,
InputRate = MgVertexInputRate.VERTEX,
Stride = perVertexStride,
},
new MgVertexInputBindingDescription
{
Binding = 1U,
InputRate = MgVertexInputRate.INSTANCE,
Stride = perInstanceStride,
},
},
VertexAttributeDescriptions = attributes.ToArray(),
});
}
