public Mesh (MemoryBlock vertices, VertexLayout decl, ushort[] indices) {
var group = new MeshGroup();
group.VertexBuffer = new VertexBuffer(vertices, decl);
group.IndexBuffer = new IndexBuffer(MemoryBlock.FromArray(indices));
vertexDecl = decl;
groups = new List<MeshGroup> { group };
}
/// <summary>
/// Welds vertices that are close together.
/// </summary>
/// <param name="layout">The layout of the vertex stream.</param>
/// <param name="data">A pointer to the vertex data stream.</param>
/// <param name="count">The number of vertices in the stream.</param>
/// <param name="remappingTable">An output remapping table from the original vertices to the welded ones.</param>
/// <param name="epsilon">The tolerance for welding vertex positions.</param>
/// <returns>
/// The number of unique vertices after welding.
/// </returns>
public static int WeldVertices(VertexLayout layout, IntPtr data, int count, out int[] remappingTable, float epsilon = 0.001f)
{
var output = stackalloc ushort[count];
var result = NativeMethods.bgfx_weld_vertices(output, ref layout.data, data, (ushort)count, epsilon);
remappingTable = new int[count];
for (int i = 0; i < count; i++)
{
remappingTable[i] = output[i];
}
return(result);
}
private void Init()
{
_imguiContext = ImGui.CreateContext();
var io = ImGui.GetIO();
// load the shaders for imgui
_imguiProgram = ResourceLoader.LoadProgram("vs_ocornut_imgui", "fs_ocornut_imgui");
_textureProgram = ResourceLoader.LoadProgram("vs_imgui_image", "fs_imgui_image");
_vertexLayout = new VertexLayout();
_vertexLayout.Begin()
.Add(VertexAttributeUsage.Position, 2, VertexAttributeType.Float)
.Add(VertexAttributeUsage.TexCoord0, 2, VertexAttributeType.Float)
.Add(VertexAttributeUsage.Color0, 4, VertexAttributeType.UInt8, true)
.End();
_texUniform = new Uniform("s_tex", UniformType.Sampler);
_fonts.Add("default", io.Fonts.AddFontDefault());
// Fonts: All fonts need to be known here, because we compile the fontatlas only once
// Example code:
/*foreach (var font in fonts)
* {
* _fonts.Add(font.name, io.Fonts.AddFontFromFileTTF(font.path, font.size));
* }*/
// Build and save the fontatlas
unsafe
{
io.Fonts.GetTexDataAsRGBA32(out var data, out var width, out var height, out var bytesPerPixel);
FontAtlas = Texture.Create2D(width, height, false, 1, TextureFormat.BGRA8, 0,
new MemoryBlock((IntPtr)data, width * height * bytesPerPixel));
_textures.Add((IntPtr)FontAtlas.GetHashCode(), FontAtlas);
}
io.Fonts.SetTexID((IntPtr)FontAtlas.GetHashCode());
// ToDo: Set KeyMappings
// -> Engine specific
}
public static extern ushort bgfx_create_dynamic_vertex_buffer(int vertexCount, ref VertexLayout.Data decl, BufferFlags flags);
public static extern void bgfx_vertex_unpack(float* output, VertexAttributeUsage attribute, ref VertexLayout.Data decl, IntPtr data, int index);
public static extern bool bgfx_check_avail_transient_buffers(int numVertices, ref VertexLayout.Data decl, int numIndices);
public static extern void bgfx_vertex_decl_begin(ref VertexLayout.Data decl, RendererBackend backend);
public static extern void bgfx_vertex_decl_skip(ref VertexLayout.Data decl, byte count);
public static extern bool bgfx_alloc_transient_buffers(out TransientVertexBuffer tvb, ref VertexLayout.Data decl, ushort numVertices, out TransientIndexBuffer tib, ushort numIndices);
/// <summary>
/// Gets the available space in the global transient vertex buffer.
/// </summary>
/// <param name="count">The number of vertices required.</param>
/// <param name="layout">The layout of each vertex.</param>
/// <returns>The number of available vertices.</returns>
public static int GetAvailableSpace(int count, VertexLayout layout)
{
return(NativeMethods.bgfx_get_avail_transient_vertex_buffer(count, ref layout.data));
}
/// <summary>
/// Packs a vector into vertex stream format.
/// </summary>
/// <param name="input">The four element vector to pack.</param>
/// <param name="inputNormalized"><c>true</c> if the input vector is normalized.</param>
/// <param name="attribute">The attribute usage of the vector data.</param>
/// <param name="layout">The layout of the vertex stream.</param>
/// <param name="data">The pointer to the vertex data stream.</param>
/// <param name="index">The index of the vertex within the stream.</param>
public static void VertexPack(float* input, bool inputNormalized, VertexAttributeUsage attribute, VertexLayout layout, IntPtr data, int index = 0)
{
NativeMethods.bgfx_vertex_pack(input, inputNormalized, attribute, ref layout.data, data, index);
}
/// <summary>
/// Unpack a vector from a vertex stream.
/// </summary>
/// <param name="output">A pointer to four floats that will receive the unpacked vector.</param>
/// <param name="attribute">The usage of the vertex attribute.</param>
/// <param name="layout">The layout of the vertex stream.</param>
/// <param name="data">A pointer to the vertex data stream.</param>
/// <param name="index">The index of the vertex within the stream.</param>
public static void VertexUnpack(float* output, VertexAttributeUsage attribute, VertexLayout layout, IntPtr data, int index = 0)
{
NativeMethods.bgfx_vertex_unpack(output, attribute, ref layout.data, data, index);
}
/// <summary>
/// Converts a stream of vertex data from one format to another.
/// </summary>
/// <param name="destinationLayout">The destination format.</param>
/// <param name="destinationData">A pointer to the output location.</param>
/// <param name="sourceLayout">The source format.</param>
/// <param name="sourceData">A pointer to the source vertex data to convert.</param>
/// <param name="count">The number of vertices to convert.</param>
public static void VertexConvert(VertexLayout destinationLayout, IntPtr destinationData, VertexLayout sourceLayout, IntPtr sourceData, int count = 1)
{
NativeMethods.bgfx_vertex_convert(ref destinationLayout.data, destinationData, ref sourceLayout.data, sourceData, count);
}
/// <summary>
/// Checks for available space to allocate transient index and vertex buffers.
/// </summary>
/// <param name="vertexCount">The number of vertices to allocate.</param>
/// <param name="layout">The layout of each vertex.</param>
/// <param name="indexCount">The number of indices to allocate.</param>
/// <returns><c>true</c> if there is sufficient space for both vertex and index buffers.</returns>
public static bool CheckAvailableTransientBufferSpace(int vertexCount, VertexLayout layout, int indexCount)
{
return NativeMethods.bgfx_check_avail_transient_buffers(vertexCount, ref layout.data, indexCount);
}
/// <summary>
/// Attempts to allocate both a transient vertex buffer and index buffer.
/// </summary>
/// <param name="vertexCount">The number of vertices to allocate.</param>
/// <param name="layout">The layout of each vertex.</param>
/// <param name="indexCount">The number of indices to allocate.</param>
/// <param name="vertexBuffer">Returns the allocated transient vertex buffer.</param>
/// <param name="indexBuffer">Returns the allocated transient index buffer.</param>
/// <returns><c>true</c> if both space requirements are satisfied and the buffers were allocated.</returns>
public static bool AllocateTransientBuffers(int vertexCount, VertexLayout layout, int indexCount, out TransientVertexBuffer vertexBuffer, out TransientIndexBuffer indexBuffer)
{
return NativeMethods.bgfx_alloc_transient_buffers(out vertexBuffer, ref layout.data, (ushort)vertexCount, out indexBuffer, (ushort)indexCount);
}
/// <summary>
/// Converts a stream of vertex data from one format to another.
/// </summary>
/// <param name="destinationLayout">The destination format.</param>
/// <param name="destinationData">A pointer to the output location.</param>
/// <param name="sourceLayout">The source format.</param>
/// <param name="sourceData">A pointer to the source vertex data to convert.</param>
/// <param name="count">The number of vertices to convert.</param>
public static void VertexConvert(VertexLayout destinationLayout, IntPtr destinationData, VertexLayout sourceLayout, IntPtr sourceData, int count = 1)
{
NativeMethods.bgfx_vertex_convert(ref destinationLayout.data, destinationData, ref sourceLayout.data, sourceData, count);
}
public static extern void bgfx_vertex_convert(ref VertexLayout.Data destDecl, IntPtr destData, ref VertexLayout.Data srcDecl, IntPtr srcData, int num);
/// <summary>
/// Welds vertices that are close together.
/// </summary>
/// <param name="layout">The layout of the vertex stream.</param>
/// <param name="data">A pointer to the vertex data stream.</param>
/// <param name="count">The number of vertices in the stream.</param>
/// <param name="remappingTable">An output remapping table from the original vertices to the welded ones.</param>
/// <param name="epsilon">The tolerance for welding vertex positions.</param>
/// <returns>
/// The number of unique vertices after welding.
/// </returns>
public static int WeldVertices(VertexLayout layout, IntPtr data, int count, out int[] remappingTable, float epsilon = 0.001f)
{
var output = stackalloc ushort[count];
var result = NativeMethods.bgfx_weld_vertices(output, ref layout.data, data, (ushort)count, epsilon);
remappingTable = new int[count];
for (int i = 0; i < count; i++)
remappingTable[i] = output[i];
return result;
}
/// <summary>
/// Initializes a new instance of the <see cref="TransientVertexBuffer"/> struct.
/// </summary>
/// <param name="vertexCount">The number of vertices that fit in the buffer.</param>
/// <param name="layout">The layout of the vertex data.</param>
public TransientVertexBuffer(int vertexCount, VertexLayout layout)
{
NativeMethods.bgfx_alloc_transient_vertex_buffer(out this, vertexCount, ref layout.data);
}
public static extern void bgfx_alloc_transient_vertex_buffer(out TransientVertexBuffer tvb, int num, ref VertexLayout.Data decl);
/// <summary>
/// Checks for available space to allocate transient index and vertex buffers.
/// </summary>
/// <param name="vertexCount">The number of vertices to allocate.</param>
/// <param name="layout">The layout of each vertex.</param>
/// <param name="indexCount">The number of indices to allocate.</param>
/// <returns><c>true</c> if there is sufficient space for both vertex and index buffers.</returns>
public static bool CheckAvailableTransientBufferSpace(int vertexCount, VertexLayout layout, int indexCount)
{
return(NativeMethods.bgfx_check_avail_transient_buffers(vertexCount, ref layout.data, indexCount));
}
public static extern void bgfx_vertex_decl_add(ref VertexLayout.Data decl, VertexAttributeUsage attribute, byte count, VertexAttributeType type, [MarshalAs(UnmanagedType.U1)] bool normalized, [MarshalAs(UnmanagedType.U1)] bool asInt);
/// <summary>
/// Initializes a new instance of the <see cref="VertexBuffer"/> struct.
/// </summary>
/// <param name="memory">The vertex data with which to populate the buffer.</param>
/// <param name="layout">The layout of the vertex data.</param>
/// <param name="flags">Flags used to control buffer behavior.</param>
public VertexBuffer(MemoryBlock memory, VertexLayout layout, BufferFlags flags = BufferFlags.None)
{
handle = NativeMethods.bgfx_create_vertex_buffer(memory.ptr, ref layout.data, flags);
}
public static extern void bgfx_vertex_decl_end(ref VertexLayout.Data decl);
internal Mesh (VertexLayout decl, List<MeshGroup> groups) {
vertexDecl = decl;
this.groups = groups;
}
public static extern void bgfx_vertex_pack(float* input, [MarshalAs(UnmanagedType.U1)] bool inputNormalized, VertexAttributeUsage attribute, ref VertexLayout.Data decl, IntPtr data, int index);
/// <summary>
/// Attempts to allocate both a transient vertex buffer and index buffer.
/// </summary>
/// <param name="vertexCount">The number of vertices to allocate.</param>
/// <param name="layout">The layout of each vertex.</param>
/// <param name="indexCount">The number of indices to allocate.</param>
/// <param name="vertexBuffer">Returns the allocated transient vertex buffer.</param>
/// <param name="indexBuffer">Returns the allocated transient index buffer.</param>
/// <returns><c>true</c> if both space requirements are satisfied and the buffers were allocated.</returns>
public static bool AllocateTransientBuffers(int vertexCount, VertexLayout layout, int indexCount, out TransientVertexBuffer vertexBuffer, out TransientIndexBuffer indexBuffer)
{
return(NativeMethods.bgfx_alloc_transient_buffers(out vertexBuffer, ref layout.data, (ushort)vertexCount, out indexBuffer, (ushort)indexCount));
}
public static extern ushort bgfx_weld_vertices(ushort* output, ref VertexLayout.Data decl, IntPtr data, ushort num, float epsilon);
/// <summary>
/// Packs a vector into vertex stream format.
/// </summary>
/// <param name="input">The four element vector to pack.</param>
/// <param name="inputNormalized"><c>true</c> if the input vector is normalized.</param>
/// <param name="attribute">The attribute usage of the vector data.</param>
/// <param name="layout">The layout of the vertex stream.</param>
/// <param name="data">The pointer to the vertex data stream.</param>
/// <param name="index">The index of the vertex within the stream.</param>
public static void VertexPack(float *input, bool inputNormalized, VertexAttributeUsage attribute, VertexLayout layout, IntPtr data, int index = 0)
{
NativeMethods.bgfx_vertex_pack(input, inputNormalized, attribute, ref layout.data, data, index);
}
public static extern bool bgfx_check_avail_transient_vertex_buffer(int num, ref VertexLayout.Data decl);
/// <summary>
/// Unpack a vector from a vertex stream.
/// </summary>
/// <param name="output">A pointer to four floats that will receive the unpacked vector.</param>
/// <param name="attribute">The usage of the vertex attribute.</param>
/// <param name="layout">The layout of the vertex stream.</param>
/// <param name="data">A pointer to the vertex data stream.</param>
/// <param name="index">The index of the vertex within the stream.</param>
public static void VertexUnpack(float *output, VertexAttributeUsage attribute, VertexLayout layout, IntPtr data, int index = 0)
{
NativeMethods.bgfx_vertex_unpack(output, attribute, ref layout.data, data, index);
}
public static extern ushort bgfx_create_dynamic_vertex_buffer_mem(MemoryBlock.DataPtr* memory, ref VertexLayout.Data decl, BufferFlags flags);
/// <summary>
/// Initializes a new instance of the <see cref="DynamicVertexBuffer"/> struct.
/// </summary>
/// <param name="vertexCount">The number of vertices that fit in the buffer.</param>
/// <param name="layout">The layout of the vertex data.</param>
/// <param name="flags">Flags used to control buffer behavior.</param>
public DynamicVertexBuffer(int vertexCount, VertexLayout layout, BufferFlags flags = BufferFlags.None)
{
handle = NativeMethods.bgfx_create_dynamic_vertex_buffer(vertexCount, ref layout.data, flags);
}