namespace Msp {
namespace GL {
-/** A single vertex component. Nvidia drivers have aliasing between the
-fixed-functions and generic vertex attributes, despite the standard not
-allowing it. We use the same attribute indices here to avoid problems. */
+/** A single vertex component. Symbolic names are provided for commonly used
+attributes. These are aliased with with generic attributes, so be careful when
+picking your attribute indices. */
enum VertexComponent
{
VERTEX2 = 1,
class VertexFormat
{
private:
- unsigned char *data;
+ enum { MAX_COMPONENTS = 15 };
+
+ unsigned char count;
+ unsigned char components[MAX_COMPONENTS];
public:
VertexFormat();
VertexFormat(VertexComponent);
- VertexFormat(const VertexFormat &);
- VertexFormat &operator=(const VertexFormat &);
- ~VertexFormat();
VertexFormat operator,(VertexComponent c) const;
VertexFormat operator,(unsigned i) const;
+ bool operator==(const VertexFormat &) const;
+ bool operator!=(const VertexFormat &other) const { return !(*this==other); }
- bool empty() const { return !data || !data[0]; }
- const unsigned char *begin() const { return data ? data+1 : 0; }
- const unsigned char *end() const { return data ? data+1+data[0] : 0; }
+ bool empty() const { return !count; }
+ const unsigned char *begin() const { return components; }
+ const unsigned char *end() const { return components+count; }
unsigned stride() const;
int offset(VertexComponent) const;
};