1 files changed, 33 insertions, 0 deletions
diff --git a/samples/OpenGL/qt_terr/terrain.h b/samples/OpenGL/qt_terr/terrain.h
new file mode 100644
index 0000000..3382a4c
--- /dev/null
+++ b/samples/OpenGL/qt_terr/terrain.h
@@ -0,0 +1,33 @@
+#ifndef TERRAIN_H
+#define TERRAIN_H
+
+#include "quad.h"
+
+#include <vector>
+#include <math.h>
+
+class Terrain : public Quad
+{
+public:
+	double z_mean_;
+	double z_mean() {
+		if( isnan(z_mean_) ) {
+			return z_mean_ = 
+				( z[0][0] + z[0][1] +
+				  z[1][0] + z[1][1] ) / 4.;
+		}
+		return z_mean_;
+	};
+	double z[2][2];
+
+public:
+	Terrain(std::vector<double>* V_) : Quad(V_) { z_mean_ = NAN; }
+
+	virtual void split();
+	virtual void track_down(double x, double y, double nz, int levels);
+
+/*protected:
+	virtual void set_range(double nx1, double nx2, double ny1, double ny2);*/
+};
+
+#endif/*TERRAIN_H*/