public VertexArray(VertexLocations vertexLocations, ShaderBlobType type, RawVertexData vertexInformation)
{
if (vertexLocations == null)
{
throw new ArgumentNullException(nameof(vertexLocations));
}
// Allocate buffers referenced by this vertex array
_BufferPosition = new GlBuffer <float>(vertexInformation.positions, BufferTarget.ArrayBuffer);
// Generate VAO name
ArrayName = Gl.GenVertexArray();
// First bind create the VAO
Gl.BindVertexArray(ArrayName);
// Select the buffer object
Gl.BindBuffer(BufferTarget.ArrayBuffer, _BufferPosition.BufferName);
// Format the vertex information: 2 floats from the current buffer
Gl.VertexAttribPointer((uint)vertexLocations.Location_Position, floats_per_position, VertexAttribType.Float, false, stride, startingLocation);
// Enable attribute
Gl.EnableVertexAttribArray((uint)vertexLocations.Location_Position);
if (type.UseIndexing)
{
_BufferIndex = new GlBuffer <uint>(vertexInformation.indexes, BufferTarget.ElementArrayBuffer);
Gl.BindBuffer(BufferTarget.ElementArrayBuffer, _BufferIndex.BufferName);
Count = vertexInformation.indexes.Length;
}
else
{
Count = (vertexInformation.positions.Length / floats_per_position);
}
if (type.VertexFormat == VertexFormat.WithColor || type.VertexFormat == VertexFormat.WithColorAndTexture)
{
_BufferColor = new GlBuffer <float>(vertexInformation.colors, BufferTarget.ArrayBuffer);
Gl.BindBuffer(BufferTarget.ArrayBuffer, _BufferColor.BufferName);
// Format the vertex information: 3 floats from the current buffer
Gl.VertexAttribPointer((uint)vertexLocations.Location_Color, floats_per_color, VertexAttribType.Float, false, stride, startingLocation);
// Enable attribute
Gl.EnableVertexAttribArray((uint)vertexLocations.Location_Color);
}
if (type.VertexFormat == VertexFormat.WithTexture || type.VertexFormat == VertexFormat.WithColorAndTexture)
{
_BufferTex = new GlBuffer <float>(vertexInformation.textures, BufferTarget.ArrayBuffer);
Gl.BindBuffer(BufferTarget.ArrayBuffer, _BufferTex.BufferName);
// Format the vertex information: 2 floats from the current buffer
Gl.VertexAttribPointer((uint)vertexLocations.Location_Texture, floats_per_textureCoordinate, VertexAttribType.Float, false, stride, startingLocation);
// Enable attribute
Gl.EnableVertexAttribArray((uint)vertexLocations.Location_Texture);
}
}
private IVertexArray BuildVertexArray(VertexLocations vertexLocations, ShaderCreationArguments args)
{
if (!args.Type.UseIndexing)
{
return(new VertexArray(vertexLocations, args.Type, RawVertexData.NonIndexed));
}
else
{
return(new VertexArray(vertexLocations, args.Type, RawVertexData.Indexed));
}
}
