private unsafe void GenerateVao()
{
fixed(uint *address = &vao)
{
glGenVertexArrays(1, address);
}
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, bufferId);
if (indexId > 0)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexId);
}
for (int i = 0; i < attributes.Count; i++)
{
ShaderAttribute attribute = attributes[i];
uint index = (uint)i;
if (attribute.IsInteger)
{
glVertexAttribIPointer(index, (int)attribute.Count, attribute.Type, Stride,
(void *)attribute.Offset);
}
else
{
glVertexAttribPointer(index, (int)attribute.Count, attribute.Type, attribute.IsNormalized, Stride,
(void *)attribute.Offset);
}
glEnableVertexAttribArray(index);
}
// This assumes that shaders won't be bound twice.
attributes = null;
IsBindingComplete = true;
}
public unsafe void Bind(uint bufferId, uint indexBufferId)
{
this.bufferId = bufferId;
this.indexBufferId = indexBufferId;
glBindVertexArray(vao);
// The index buffer ID can be zero when array rendering is being used.
if (indexBufferId != 0)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBufferId);
}
glBindBuffer(GL_ARRAY_BUFFER, bufferId);
for (int i = 0; i < attributes.Count; i++)
{
ShaderAttribute attribute = attributes[i];
uint index = (uint)i;
if (attribute.IsInteger)
{
glVertexAttribIPointer(index, (int)attribute.Count, attribute.Type, Stride,
(void *)attribute.Offset);
}
else
{
glVertexAttribPointer(index, (int)attribute.Count, attribute.Type, attribute.IsNormalized, Stride,
(void *)attribute.Offset);
}
glEnableVertexAttribArray(index);
}
// This assumes that shaders won't be bound twice.
attributes = null;
BindingComplete = true;
}