private void bindAttributes(ShaderProgram shader, int[] locations)
{
var stillValid = this.cachedLocations.Count != 0;
var numAttributes = attributes.size();
if (stillValid)
{
if (locations == null)
{
for (int i = 0; stillValid && i < numAttributes; i++)
{
VertexAttribute attribute = attributes[i];
int location = shader.getAttributeLocation(attribute.alias);
stillValid = location == this.cachedLocations[i];
}
}
else
{
stillValid = locations.Length == this.cachedLocations.Count;
for (int i = 0; stillValid && i < numAttributes; i++)
{
stillValid = locations[i] == this.cachedLocations[i];
}
}
}
if (!stillValid)
{
GL.BindBuffer(BufferTarget.ArrayBuffer, bufferHandle);
unbindAttributes(shader);
this.cachedLocations.Clear();
for (int i = 0; i < numAttributes; i++)
{
VertexAttribute attribute = attributes[i];
if (locations == null)
{
this.cachedLocations.Add(shader.getAttributeLocation(attribute.alias));
}
else
{
this.cachedLocations.Add(locations[i]);
}
int location = this.cachedLocations[i];
if (location < 0)
{
continue;
}
shader.enableVertexAttribute(location);
shader.setVertexAttribute(location, attribute.numComponents, attribute.type, attribute.normalized, attributes.vertexSize, attribute.offset);
}
}
}
public VertexAttribute getVertexAttribute(int usage)
{
VertexAttributes attributes = vertices.getAttributes();
int len = attributes.size();
for (int i = 0; i < len; i++)
{
if (attributes[i].usage == usage)
{
return(attributes[i]);
}
}
return(null);
}