// every buffer needs it's layout now!
public unsafe void AddVertexBuffer(VertexBuffer vb)
{
if (vb.GetLayout() == null || vb.GetLayout().GetElements().Length == 0)
{
Log.Core.Error("vertex buffer has no layout");
return;
}
glBindVertexArray(id);
vb.Bind();
BufferElement[] elements = vb.GetLayout().GetElements();
BufferLayout layout = vb.GetLayout();
// when giving type to attrib pointer we need the BASE type
for (int i = 0; i < elements.Length; i++)
{
switch (elements[i].type)
{
case ShaderDataType.Float:
case ShaderDataType.Float2:
case ShaderDataType.Float3:
case ShaderDataType.Float4:
{
glEnableVertexAttribArray(vertexBufferIndex);
glVertexAttribPointer(vertexBufferIndex, (int)elements[i].GetComponentCount(), BufferElement.ShaderDataTypeToBaseType(elements[i].type), elements[i].normalized, (int)layout.GetStride(), (void *)elements[i].offset);
glVertexAttribDivisor(vertexBufferIndex, elements[i].divisor);
vertexBufferIndex++;
break;
}
case ShaderDataType.Int:
case ShaderDataType.Int2:
case ShaderDataType.Int3:
case ShaderDataType.Int4:
case ShaderDataType.Bool:
{
glEnableVertexAttribArray(vertexBufferIndex);
// be aware of the I in the glVertexAttribIPointer
glVertexAttribIPointer(vertexBufferIndex, (int)elements[i].GetComponentCount(), BufferElement.ShaderDataTypeToBaseType(elements[i].type), (int)layout.GetStride(), (void *)elements[i].offset);
glVertexAttribDivisor(vertexBufferIndex, elements[i].divisor);
vertexBufferIndex++;
break;
}
case ShaderDataType.Mat3:
case ShaderDataType.Mat4:
{
uint count = elements[i].GetComponentCount();
for (uint c = 0; c < count; c++)
{
glEnableVertexAttribArray(vertexBufferIndex);
glVertexAttribPointer(vertexBufferIndex, (int)count, BufferElement.ShaderDataTypeToBaseType(elements[i].type), elements[i].normalized, (int)layout.GetStride(), (void *)(elements[i].offset + sizeof(float) * count * c));
glVertexAttribDivisor(vertexBufferIndex, elements[i].divisor);
vertexBufferIndex++;
}
break;
}
default: Log.Core.Error("unknow shader data type"); break;
}
}
vertexBuffers.Add(vb);
}
public void SetLayout(BufferLayout layout) => this.layout = layout;
