private void SetVertexAttributes(OpenGLVertexInputLayout inputlayout, VertexBuffer[] vertexBuffers)
{
int totalSlotsBound = 0;
for (int i = 0; i < inputlayout.VBLayoutsBySlot.Length; i++)
{
OpenGLVertexInput input = inputlayout.VBLayoutsBySlot[i];
OpenGLVertexBuffer vb = ((OpenGLVertexBuffer)vertexBuffers[i]);
vb.Apply();
for (int slot = 0; slot < input.Elements.Length; slot++)
{
ref OpenGLVertexInputElement element = ref input.Elements[slot]; // Large structure -- use by reference.
int actualSlot = totalSlotsBound + slot;
if (actualSlot >= _vertexAttributesBound)
{
GL.EnableVertexAttribArray(actualSlot);
}
GL.VertexAttribPointer(actualSlot, element.ElementCount, element.Type, element.Normalized, vb.Stride, element.Offset);
int stepRate = element.InstanceStepRate;
if (_vertexAttribDivisors[actualSlot] != stepRate)
{
GL.VertexAttribDivisor(actualSlot, stepRate);
_vertexAttribDivisors[actualSlot] = stepRate;
}
}
totalSlotsBound += input.Elements.Length;
}
public int SetVertexAttributes(int vertexBufferSlot, OpenGLVertexBuffer vb, int previousAttributesBound)
{
// TODO: Related to OpenGLRenderContext.PlatformSetVertexBuffer()
// These attributes should be lazily set on a draw call or something.
if (vertexBufferSlot <= VBLayoutsBySlot.Length)
{
return(previousAttributesBound);
}
int baseSlot = GetSlotBaseIndex(vertexBufferSlot);
OpenGLMaterialVertexInput input = VBLayoutsBySlot[vertexBufferSlot];
vb.Apply();
for (int i = 0; i < input.Elements.Length; i++)
{
OpenGLMaterialVertexInputElement element = input.Elements[i];
int slot = baseSlot + i;
GL.EnableVertexAttribArray(slot);
GL.VertexAttribPointer(slot, element.ElementCount, element.Type, element.Normalized, input.VertexSizeInBytes, element.Offset);
}
for (int extraSlot = input.Elements.Length; extraSlot < previousAttributesBound; extraSlot++)
{
GL.DisableVertexAttribArray(extraSlot);
}
return(input.Elements.Length);
}
public void SetAndGet_Array()
{
OpenGLVertexBuffer vb = (OpenGLVertexBuffer)_factory.CreateVertexBuffer(1, false);
float[] vertexData = Enumerable.Range(0, 150).Select(i => (float)i).ToArray();
vb.SetVertexData(vertexData, new VertexDescriptor(4, 1, 0, IntPtr.Zero));
float[] returned = new float[vertexData.Length];
vb.GetData(returned);
Assert.Equal(vertexData, returned);
}
public void SetAndGet_Array_Offset()
{
OpenGLVertexBuffer vb = (OpenGLVertexBuffer)_factory.CreateVertexBuffer(1, false);
float[] vertexData = Enumerable.Range(0, 150).Select(i => (float)i).ToArray();
vb.SetVertexData(vertexData, new VertexDescriptor(sizeof(float), 1, 0, IntPtr.Zero), 250);
float[] returned = new float[vertexData.Length + 250];
vb.GetData(returned);
for (int i = 250; i < returned.Length; i++)
{
Assert.Equal(vertexData[i - 250], returned[i]);
}
}