Load VertexFormat for Mesh as an array of VertexComponents

[libs/gl.git] / source / vertexformat.h

diff --git a/source/vertexformat.h b/source/vertexformat.h
index fb47484b35940b7e873b6d2586d333df0edda802..9be98160b0bb0d23ef62358d150aa6e670d254d2 100644 (file)
--- a/source/vertexformat.h
+++ b/source/vertexformat.h
@@ -6,20 +6,23 @@
 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. */
 enum VertexComponent
 {
        VERTEX2 = 1,
        VERTEX3,
        VERTEX4,
-       NORMAL3 = 6,
-       COLOR4_UBYTE = 8,
-       COLOR3_FLOAT = 10,
+       NORMAL3 = 10,
+       COLOR4_UBYTE = 12,
+       COLOR3_FLOAT = 14,
        COLOR4_FLOAT,
-       TEXCOORD1 = 12,
+       TEXCOORD1 = 32,
        TEXCOORD2,
        TEXCOORD3,
        TEXCOORD4,
-       ATTRIB1 = 44,
+       ATTRIB1 = 64,
        ATTRIB2,
        ATTRIB3,
        ATTRIB4
@@ -44,7 +47,7 @@ public:
        const unsigned char *begin() const { return data ? data+1 : 0; }
        const unsigned char *end() const { return data ? data+1+data[0] : 0; }
        unsigned stride() const;
-       int offset(VertexComponent, unsigned = 0) const;
+       int offset(VertexComponent) const;
 };
 
 inline VertexFormat operator,(VertexComponent c1, VertexComponent c2)
@@ -53,6 +56,8 @@ inline VertexFormat operator,(VertexComponent c1, VertexComponent c2)
 inline VertexFormat operator,(VertexComponent c, unsigned i)
 { return (VertexFormat(c), i); }
 
+VertexComponent make_indexed_component(VertexComponent, unsigned);
+
 inline unsigned get_component_type(unsigned char c)
 { return c>>2; }
 
@@ -63,7 +68,6 @@ inline unsigned get_stride(const VertexFormat &f)
 { return f.stride(); }
 
 void operator>>(const LexicalConverter &, VertexComponent &);
-void operator>>(const LexicalConverter &, VertexFormat &);
 
 } // namespace GL
 } // namespace Msp