public int SetVertexAttributes(VertexBuffer[] vertexBuffers, int previousAttributesBound, int baseVertexOffset)
{
int totalSlotsBound = 0;
for (int i = 0; i < VBLayoutsBySlot.Length; i++)
{
OpenGLESMaterialVertexInput input = VBLayoutsBySlot[i];
((OpenGLESVertexBuffer)vertexBuffers[i]).Apply();
for (int slot = 0; slot < input.Elements.Length; slot++)
{
OpenGLESMaterialVertexInputElement element = input.Elements[slot];
int actualSlot = totalSlotsBound + slot;
GL.EnableVertexAttribArray(actualSlot);
Utilities.CheckLastGLES3Error();
int baseVertexOffsetBytes = baseVertexOffset * input.VertexSizeInBytes;
GL.VertexAttribPointer(actualSlot, element.ElementCount, element.Type, element.Normalized, input.VertexSizeInBytes, element.Offset + baseVertexOffsetBytes);
Utilities.CheckLastGLES3Error();
GL.VertexAttribDivisor(actualSlot, element.InstanceStepRate);
Utilities.CheckLastGLES3Error();
}
totalSlotsBound += input.Elements.Length;
}
for (int extraSlot = totalSlotsBound; extraSlot < previousAttributesBound; extraSlot++)
{
GL.DisableVertexAttribArray(extraSlot);
Utilities.CheckLastGLES3Error();
}
return(totalSlotsBound);
}
public OpenGLESMaterialVertexInput(VertexInputDescription genericInput)
{
VertexSizeInBytes = genericInput.VertexSizeInBytes;
Elements = new OpenGLESMaterialVertexInputElement[genericInput.Elements.Length];
int offset = 0;
for (int i = 0; i < Elements.Length; i++)
{
var genericElement = genericInput.Elements[i];
Elements[i] = new OpenGLESMaterialVertexInputElement(genericElement, offset);
offset += genericElement.SizeInBytes;
}
}