X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbuilders%2Fprimitivebuilder.h;fp=source%2Fbuilders%2Fprimitivebuilder.h;h=0ffd170cd3e82659cef26528b0bfaf341f2d634e;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/builders/primitivebuilder.h b/source/builders/primitivebuilder.h
new file mode 100644
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+++ b/source/builders/primitivebuilder.h
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+#ifndef MSP_GL_PRIMITIVEBUILDER_H_
+#define MSP_GL_PRIMITIVEBUILDER_H_
+
+#include "primitivetype.h"
+#include "vertexarray.h"
+#include "vertexbuilder.h"
+
+namespace Msp {
+namespace GL {
+
+class VertexArray;
+class VertexArrayBuilder;
+
+/**
+Base class for primitive builders.  This is derived from VertexBuilder and adds
+begin() and end() functions for specifying batches of primitives instead of
+just vertices.
+*/
+class PrimitiveBuilder: public VertexBuilder
+{
+protected:
+	VertexArray &array;
+	VertexArrayBuilder vab;
+	PrimitiveType type;
+	bool in_batch;
+	unsigned offs;
+
+	PrimitiveBuilder(VertexArray &);
+public:
+	void begin(PrimitiveType);
+	void end();
+	void offset(unsigned);
+	void element(unsigned);
+	PrimitiveType get_type() const;
+protected:
+	virtual void vertex_(const Vector4 &);
+	virtual void begin_() = 0;
+	virtual void end_() = 0;
+	virtual void element_(unsigned) = 0;
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif