/// <summary>
/// Creates a <see cref="VertexBuffer"/> object(actually an array) directly in server side(GPU) without initializing its value.
/// </summary>
/// <param name="elementType">element's type of this 'array'.</param>
/// <param name="length">How many elements are there?</param>
/// <param name="config">mapping to vertex shader's 'in' type.</param>
/// <param name="varNameInVertexShader">mapping to vertex shader's 'in' name.</param>
/// <param name="usage"></param>
/// <param name="instanceDivisor"></param>
/// <param name="patchVertexes"></param>
/// <returns></returns>
public static VertexBuffer Create(Type elementType, int length, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instanceDivisor = 0, int patchVertexes = 0)
{
if (!elementType.IsValueType)
{
throw new ArgumentException(string.Format("{0} must be a value type!", elementType));
}
if (glGenBuffers == null)
{
glGenBuffers = OpenGL.GetDelegateFor <OpenGL.glGenBuffers>();
}
if (glBindBuffer == null)
{
glBindBuffer = OpenGL.GetDelegateFor <OpenGL.glBindBuffer>();
}
if (glBufferData == null)
{
glBufferData = OpenGL.GetDelegateFor <OpenGL.glBufferData>();
}
int byteLength = Marshal.SizeOf(elementType) * length;
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, byteLength, IntPtr.Zero, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, varNameInVertexShader, length, byteLength, instanceDivisor, patchVertexes);
return(buffer);
}
/// <summary>
/// Vertex' attribute buffer's pointer.
/// </summary>
/// <param name="bufferId">用glGenBuffers()得到的VBO的Id。<para>Id got from glGenBuffers();</para></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);
/// </param>
/// <param name="length">此VBO含有多个个元素？<para>How many elements?</para></param>
/// <param name="byteLength">此VBO中的数据在内存中占用多少个字节？<para>How many bytes in this buffer?</para></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
internal VertexBuffer(
uint bufferId, VBOConfig config, int length, int byteLength,
uint instancedDivisor = 0, int patchVertexes = 0)
: base(bufferId, length, byteLength)
{
this.Config = config;
this.InstancedDivisor = instancedDivisor;
this.PatchVertexes = patchVertexes;
}
/// <summary>
/// 获取顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="usage"></param>
/// <param name="first"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer <T>(this T[] array, VBOConfig config, BufferUsage usage, int first, uint instancedDivisor = 0, int patchVertexes = 0) where T : struct
{
if (array == null)
{
throw new ArgumentNullException("array");
}
return(GenVertexBuffer(array, config, usage, first, array.Length, instancedDivisor, patchVertexes));
}
/// <summary>
/// Vertex' attribute buffer's pointer.
/// </summary>
/// <param name="bufferId">用glGenBuffers()得到的VBO的Id。<para>Id got from glGenBuffers();</para></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);
/// </param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="length">此VBO含有多个个元素？<para>How many elements?</para></param>
/// <param name="byteLength">此VBO中的数据在内存中占用多少个字节？<para>How many bytes in this buffer?</para></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
internal VertexBuffer(
uint bufferId, VBOConfig config, string varNameInVertexShader, int length, int byteLength,
uint instancedDivisor = 0, int patchVertexes = 0)
: base(bufferId, length, byteLength)
{
this.VarNameInVertexShader = varNameInVertexShader;
this.Config = config;
this.InstancedDivisor = instancedDivisor;
this.PatchVertexes = patchVertexes;
}
/// <summary>
/// Vertex' attribute buffer's pointer.
/// </summary>
/// <param name="bufferId">用glGenBuffers()得到的VBO的Id。<para>Id got from glGenBuffers();</para></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);
/// </param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="length">此VBO含有多个个元素？<para>How many elements?</para></param>
/// <param name="byteLength">此VBO中的数据在内存中占用多少个字节？<para>How many bytes in this buffer?</para></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
internal VertexBuffer(
uint bufferId, VBOConfig config, string varNameInVertexShader, int length, int byteLength,
uint instancedDivisor = 0, int patchVertexes = 0)
: base(bufferId, length, byteLength)
{
this.VarNameInVertexShader = varNameInVertexShader;
this.Config = config;
this.InstancedDivisor = instancedDivisor;
this.PatchVertexes = patchVertexes;
}
/// <summary>
/// 获取顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="usage"></param>
/// <param name="blockSize">How many elements in a block?</param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer[] GenVertexBuffers <T>(this T[] array, VBOConfig config, BufferUsage usage, int blockSize, uint instancedDivisor = 0, int patchVertexes = 0) where T : struct
{
if (array == null)
{
throw new ArgumentNullException("array");
}
const int first = 0;
return(GenVertexBuffers(array, config, usage, first, blockSize, instancedDivisor, patchVertexes));
}
/// <summary>
/// Vertex' attribute buffer's pointer.
/// </summary>
/// <param name="bufferId">用glGenBuffers()得到的VBO的Id。<para>Id got from glGenBuffers();</para></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);
/// </param>
/// <param name="vertexCount">此VBO含有多个个元素？<para>How many elements?</para></param>
/// <param name="byteLength">此VBO中的数据在内存中占用多少个字节？<para>How many bytes in this buffer?</para></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
internal VertexBuffer(
uint bufferId, VBOConfig config, int vertexCount, int byteLength,
uint instancedDivisor = 0, int patchVertexes = 0)
: base(bufferId, vertexCount, byteLength)
{
this.Target = BufferTarget.ArrayBuffer;
this.Config = config;
this.InstancedDivisor = instancedDivisor;
this.PatchVertexes = patchVertexes;
}
/// <summary>
/// 获取顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer <T>(this T[] array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0) where T : struct
{
GCHandle pinned = GCHandle.Alloc(array, GCHandleType.Pinned);
IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
UnmanagedArrayBase unmanagedArray = new TempUnmanagedArray <T>(header, array.Length);// It's not neecessary to call Dispose() for this unmanaged array.
VertexBuffer buffer = GenVertexBuffer(unmanagedArray, config, varNameInVertexShader, usage, instancedDivisor, patchVertexes);
pinned.Free();
return(buffer);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="data"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer <T>(this T data, VBOConfig config, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0) where T : struct
{
var array = new T[] { data };
return(GenVertexBuffer(array, config, usage, instancedDivisor, patchVertexes));
// another way to do this:
//using (UnmanagedArrayBase unmanagedArray = new UnmanagedArray<T>(1))
//{
// Marshal.StructureToPtr(data, unmanagedArray.Header, false);
// VertexBuffer buffer = GetVertexBufferObject(unmanagedArray, config, usage, instancedDivisor, patchVertexes);
// return buffer;
//}
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, array.Length, array.ByteLength, instancedDivisor, patchVertexes);
return(buffer);
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="array"></param>
/// <param name="config"></param>
/// <param name="varNameInVertexShader"></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor"></param>
/// <param name="patchVertexes"></param>
/// <returns></returns>
public static GLVertexNode Create <T>(T[] array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
var node = new GLVertexNode();
node.array = array;
node.length = array.Length;
node.byteLength = array.Length * Marshal.SizeOf(typeof(T));
node.config = config;
node.varNameInVertexShader = varNameInVertexShader;
node.usage = usage;
node.instancedDivisor = instancedDivisor;
node.patchVertexes = patchVertexes;
return(node);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
var ids = new uint[1];
{
glGenBuffers(1, ids);
const uint target = GL.GL_ARRAY_BUFFER;
glBindBuffer(target, ids[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
}
var buffer = new VertexBuffer(
ids[0], config, array.Length, array.ByteLength,
instancedDivisor, patchVertexes);
return(buffer);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
if (glGenBuffers == null)
{
InitFunctions();
}
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, varNameInVertexShader, array.Length, array.ByteLength, instancedDivisor, patchVertexes);
return buffer;
}
/// <summary>
/// Creates a <see cref="VertexBuffer"/> object(actually an array) directly in server side(GPU) without initializing its value.
/// </summary>
/// <param name="elementType">element's type of this 'array'.</param>
/// <param name="length">How many elements are there?</param>
/// <param name="config">mapping to vertex shader's 'in' type.</param>
/// <param name="varNameInVertexShader">mapping to vertex shader's 'in' name.</param>
/// <param name="usage"></param>
/// <param name="instanceDivisor"></param>
/// <param name="patchVertexes"></param>
/// <returns></returns>
public static VertexBuffer Create(Type elementType, int length, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instanceDivisor = 0, int patchVertexes = 0)
{
if (!elementType.IsValueType) { throw new ArgumentException(string.Format("{0} must be a value type!", elementType)); }
if (glGenBuffers == null) { glGenBuffers = OpenGL.GetDelegateFor<OpenGL.glGenBuffers>(); }
if (glBindBuffer == null) { glBindBuffer = OpenGL.GetDelegateFor<OpenGL.glBindBuffer>(); }
if (glBufferData == null) { glBufferData = OpenGL.GetDelegateFor<OpenGL.glBufferData>(); }
int byteLength = Marshal.SizeOf(elementType) * length;
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, byteLength, IntPtr.Zero, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, varNameInVertexShader, length, byteLength, instanceDivisor, patchVertexes);
return buffer;
}
/// <summary>
/// 获取顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="usage"></param>
/// <param name="first"></param>
/// <param name="blockSize">How many elements per index buffer?(sometimes except the last one)</param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer[] GenVertexBuffers <T>(this T[] array, VBOConfig config, BufferUsage usage, int first, int blockSize, uint instancedDivisor = 0, int patchVertexes = 0) where T : struct
{
if (array == null)
{
throw new ArgumentNullException("array");
}
if (first < 0)
{
throw new ArgumentOutOfRangeException("first");
}
if (blockSize <= 0)
{
throw new ArgumentOutOfRangeException("count");
}
if (array.Length <= first)
{
throw new ArgumentOutOfRangeException("first");
}
GCHandle pinned = GCHandle.Alloc(array, GCHandleType.Pinned);
//IntPtr header = pinned.AddrOfPinnedObject();
// same result with: IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
var list = new List <VertexBuffer>();
int current = first;
int totalLength = array.Length;
do
{
IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, current);
int length = (current + blockSize <= totalLength) ? blockSize : (totalLength - current);
UnmanagedArrayBase unmanagedArray = new TempUnmanagedArray <T>(header, length);// It's not necessary to call Dispose() for this unmanaged array.
VertexBuffer buffer = GenVertexBuffer(unmanagedArray, config, usage, instancedDivisor, patchVertexes);
list.Add(buffer);
current += length;
} while (current < totalLength);
pinned.Free();
return(list.ToArray());
}
internal static int GetDataTypeByteLength(this VBOConfig config)
{
int result = 0;
switch (config)
{
case VBOConfig.Byte:
result = sizeof(byte);
break;
case VBOConfig.BVec2:
result = sizeof(byte);
break;
case VBOConfig.BVec3:
result = sizeof(byte);
break;
case VBOConfig.BVec4:
result = sizeof(byte);
break;
case VBOConfig.Int:
result = sizeof(int);
break;
case VBOConfig.IVec2:
result = sizeof(int);
break;
case VBOConfig.IVec3:
result = sizeof(int);
break;
case VBOConfig.IVec4:
result = sizeof(int);
break;
case VBOConfig.UInt:
result = sizeof(uint);
break;
case VBOConfig.UVec2:
result = sizeof(uint);
break;
case VBOConfig.UVec3:
result = sizeof(uint);
break;
case VBOConfig.UVec4:
result = sizeof(uint);
break;
case VBOConfig.Float:
result = sizeof(float);
break;
case VBOConfig.Vec2:
result = sizeof(float);
break;
case VBOConfig.Vec3:
result = sizeof(float);
break;
case VBOConfig.Vec4:
result = sizeof(float);
break;
case VBOConfig.Double:
result = sizeof(double);
break;
case VBOConfig.DVec2:
result = sizeof(double);
break;
case VBOConfig.DVec3:
result = sizeof(double);
break;
case VBOConfig.DVec4:
result = sizeof(double);
break;
case VBOConfig.Mat2:
result = sizeof(float);
break;
case VBOConfig.Mat3:
result = sizeof(float);
break;
case VBOConfig.Mat4:
result = sizeof(float);
break;
default:
throw new System.NotImplementedException();
}
return(result);
}
internal static int GetDataTypeByteLength(this VBOConfig config)
{
int result = 0;
switch (config)
{
case VBOConfig.Byte:
result = sizeof(byte);
break;
case VBOConfig.BVec2:
result = sizeof(byte);
break;
case VBOConfig.BVec3:
result = sizeof(byte);
break;
case VBOConfig.BVec4:
result = sizeof(byte);
break;
case VBOConfig.Int:
result = sizeof(int);
break;
case VBOConfig.IVec2:
result = sizeof(int);
break;
case VBOConfig.IVec3:
result = sizeof(int);
break;
case VBOConfig.IVec4:
result = sizeof(int);
break;
case VBOConfig.UInt:
result = sizeof(uint);
break;
case VBOConfig.UVec2:
result = sizeof(uint);
break;
case VBOConfig.UVec3:
result = sizeof(uint);
break;
case VBOConfig.UVec4:
result = sizeof(uint);
break;
case VBOConfig.Float:
result = sizeof(float);
break;
case VBOConfig.Vec2:
result = sizeof(float);
break;
case VBOConfig.Vec3:
result = sizeof(float);
break;
case VBOConfig.Vec4:
result = sizeof(float);
break;
case VBOConfig.Double:
result = sizeof(double);
break;
case VBOConfig.DVec2:
result = sizeof(double);
break;
case VBOConfig.DVec3:
result = sizeof(double);
break;
case VBOConfig.DVec4:
result = sizeof(double);
break;
case VBOConfig.Mat2:
result = sizeof(float);
break;
case VBOConfig.Mat3:
result = sizeof(float);
break;
case VBOConfig.Mat4:
result = sizeof(float);
break;
default:
throw new NotDealWithNewEnumItemException(typeof(VBOConfig));
}
return(result);
}
/// <summary>
/// Use this <see cref="UniformBuffer"/> as a <see cref="VertexBuffer"/>.
/// </summary>
/// <param name="config"></param>
/// <returns></returns>
public VertexBuffer AsVertexBuffer(VBOConfig config)
{
var buffer = new VertexBuffer(this.BufferId, config, this.Length, this.ByteLength);
return(buffer);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="header">array's Header.</param>
/// <param name="length">array's Length.</param>
/// <param name="byteLength">array's ByteLength.</param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(IntPtr header, int length, int byteLength, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
if (glGenBuffers == null)
{
InitFunctions();
}
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, byteLength, header, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, varNameInVertexShader, length, byteLength, instancedDivisor, patchVertexes);
return(buffer);
}
/// <summary>
/// Gets parameter values for glVertexAttribPointer() and glEnable/DisableVertexAttribArray().
/// <para>second parameter in glVertexAttribPointer(uint index, int size, uint type, bool normalized, int stride, IntPtr pointer);</para>
/// <para>How many primitive data type(float/int/uint etc) are there in a data unit?</para>
/// </summary>
/// <param name="config"></param>
internal static int GetDataSize(this VBOConfig config)
{
int dataSize = 0;
switch (config)
{
case VBOConfig.Byte:
dataSize = 1;
break;
case VBOConfig.BVec2:
dataSize = 2;
break;
case VBOConfig.BVec3:
dataSize = 3;
break;
case VBOConfig.BVec4:
dataSize = 4;
break;
case VBOConfig.Int:
dataSize = 1;
break;
case VBOConfig.IVec2:
dataSize = 2;
break;
case VBOConfig.IVec3:
dataSize = 3;
break;
case VBOConfig.IVec4:
dataSize = 4;
break;
case VBOConfig.UInt:
dataSize = 1;
break;
case VBOConfig.UVec2:
dataSize = 2;
break;
case VBOConfig.UVec3:
dataSize = 3;
break;
case VBOConfig.UVec4:
dataSize = 4;
break;
case VBOConfig.Float:
dataSize = 1;
break;
case VBOConfig.Vec2:
dataSize = 2;
break;
case VBOConfig.Vec3:
dataSize = 3;
break;
case VBOConfig.Vec4:
dataSize = 4;
break;
case VBOConfig.Double:
dataSize = 1;
break;
case VBOConfig.DVec2:
dataSize = 2;
break;
case VBOConfig.DVec3:
dataSize = 3;
break;
case VBOConfig.DVec4:
dataSize = 4;
break;
case VBOConfig.Mat2:
dataSize = 2;
break;
case VBOConfig.Mat3:
dataSize = 3;
break;
case VBOConfig.Mat4:
dataSize = 4;
break;
default:
throw new NotDealWithNewEnumItemException(typeof(VBOConfig));
}
return(dataSize);
}
/// <summary>
/// Gets parameter values for glVertexAttribPointer() and glEnable/DisableVertexAttribArray().
/// <para>second parameter in glVertexAttribPointer(uint index, int size, uint type, bool normalized, int stride, IntPtr pointer);</para>
/// <para>How many primitive data type(float/int/uint etc) are there in a data unit?</para>
/// </summary>
/// <param name="config"></param>
internal static int GetDataSize(this VBOConfig config)
{
int dataSize = 0;
switch (config)
{
case VBOConfig.Byte:
dataSize = 1;
break;
case VBOConfig.BVec2:
dataSize = 2;
break;
case VBOConfig.BVec3:
dataSize = 3;
break;
case VBOConfig.BVec4:
dataSize = 4;
break;
case VBOConfig.Int:
dataSize = 1;
break;
case VBOConfig.IVec2:
dataSize = 2;
break;
case VBOConfig.IVec3:
dataSize = 3;
break;
case VBOConfig.IVec4:
dataSize = 4;
break;
case VBOConfig.UInt:
dataSize = 1;
break;
case VBOConfig.UVec2:
dataSize = 2;
break;
case VBOConfig.UVec3:
dataSize = 3;
break;
case VBOConfig.UVec4:
dataSize = 4;
break;
case VBOConfig.Float:
dataSize = 1;
break;
case VBOConfig.Vec2:
dataSize = 2;
break;
case VBOConfig.Vec3:
dataSize = 3;
break;
case VBOConfig.Vec4:
dataSize = 4;
break;
case VBOConfig.Double:
dataSize = 1;
break;
case VBOConfig.DVec2:
dataSize = 2;
break;
case VBOConfig.DVec3:
dataSize = 3;
break;
case VBOConfig.DVec4:
dataSize = 4;
break;
case VBOConfig.Mat2:
dataSize = 2;
break;
case VBOConfig.Mat3:
dataSize = 3;
break;
case VBOConfig.Mat4:
dataSize = 4;
break;
default:
throw new NotImplementedException();
}
return(dataSize);
}
/// <summary>
/// Gets parameter values for glVertexAttribPointer() and glEnable/DisableVertexAttribArray().
/// </summary>
/// <param name="config"></param>
internal static VBOConfigDetail Parse(this VBOConfig config)
{
var result = new VBOConfigDetail();
switch (config)
{
case VBOConfig.Byte:
result.dataSize = 1;
result.dataType = GL.GL_BYTE;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.BVec2:
result.dataSize = 2;
result.dataType = GL.GL_BYTE;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.BVec3:
result.dataSize = 3;
result.dataType = GL.GL_BYTE;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.BVec4:
result.dataSize = 4;
result.dataType = GL.GL_BYTE;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.Int:
result.dataSize = 1;
result.dataType = GL.GL_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.IVec2:
result.dataSize = 2;
result.dataType = GL.GL_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.IVec3:
result.dataSize = 3;
result.dataType = GL.GL_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.IVec4:
result.dataSize = 4;
result.dataType = GL.GL_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.UInt:
result.dataSize = 1;
result.dataType = GL.GL_UNSIGNED_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.UVec2:
result.dataSize = 2;
result.dataType = GL.GL_UNSIGNED_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.UVec3:
result.dataSize = 3;
result.dataType = GL.GL_UNSIGNED_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.UVec4:
result.dataSize = 4;
result.dataType = GL.GL_UNSIGNED_INT;
result.pointerType = VertexAttribPointerType.Integer;
break;
case VBOConfig.Float:
result.dataSize = 1;
result.dataType = GL.GL_FLOAT;
result.pointerType = VertexAttribPointerType.Default;
break;
case VBOConfig.Vec2:
result.dataSize = 2;
result.dataType = GL.GL_FLOAT;
result.pointerType = VertexAttribPointerType.Default;
break;
case VBOConfig.Vec3:
result.dataSize = 3;
result.dataType = GL.GL_FLOAT;
result.pointerType = VertexAttribPointerType.Default;
break;
case VBOConfig.Vec4:
result.dataSize = 4;
result.dataType = GL.GL_FLOAT;
result.pointerType = VertexAttribPointerType.Default;
break;
case VBOConfig.Double:
result.dataSize = 1;
result.dataType = GL.GL_DOUBLE;
result.pointerType = VertexAttribPointerType.Long;
break;
case VBOConfig.DVec2:
result.dataSize = 2;
result.dataType = GL.GL_DOUBLE;
result.pointerType = VertexAttribPointerType.Long;
break;
case VBOConfig.DVec3:
result.dataSize = 3;
result.dataType = GL.GL_DOUBLE;
result.pointerType = VertexAttribPointerType.Long;
break;
case VBOConfig.DVec4:
result.dataSize = 4;
result.dataType = GL.GL_DOUBLE;
result.pointerType = VertexAttribPointerType.Long;
break;
case VBOConfig.Mat2:
result.locationCount = 2;
result.dataSize = 2;
result.dataType = GL.GL_FLOAT;
result.stride = Marshal.SizeOf(typeof(mat2));
result.startOffsetUnit = Marshal.SizeOf(typeof(vec2));
result.pointerType = VertexAttribPointerType.Default;
break;
case VBOConfig.Mat3:
result.locationCount = 3;
result.dataSize = 3;
result.dataType = GL.GL_FLOAT;
result.stride = Marshal.SizeOf(typeof(mat3));
result.startOffsetUnit = Marshal.SizeOf(typeof(vec3));
result.pointerType = VertexAttribPointerType.Default;
break;
case VBOConfig.Mat4:
result.locationCount = 4;
result.dataSize = 4;
result.dataType = GL.GL_FLOAT;
result.stride = Marshal.SizeOf(typeof(mat4));
result.startOffsetUnit = Marshal.SizeOf(typeof(vec4));
result.pointerType = VertexAttribPointerType.Default;
break;
default:
throw new Exception("Unexpected VBOConfig!");
}
return(result);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
return(GenVertexBuffer(array.Header, array.Length, array.ByteLength, config, varNameInVertexShader, usage, instancedDivisor, patchVertexes));
}
