diff options
Diffstat (limited to 'samples/OpenGL/qt_terr/terrain.cpp')
| -rw-r--r-- | samples/OpenGL/qt_terr/terrain.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/samples/OpenGL/qt_terr/terrain.cpp b/samples/OpenGL/qt_terr/terrain.cpp new file mode 100644 index 0000000..d08d345 --- /dev/null +++ b/samples/OpenGL/qt_terr/terrain.cpp @@ -0,0 +1,43 @@ +#include "terrain.h"
+
+Terrain::Terrain()
+{
+ z_mean=0.0;
+}
+
+void Terrain::split()
+{
+ if(is_split())
+ return;
+
+ quads[0][0] = new Terrain(V);
+ quads[0][1] = new Terrain(V);
+ quads[1][0] = new Terrain(V);
+ quads[1][1] = new Terrain(V);
+
+ quads[0][0]->set_range(x1, x_mid, y1, y_mid);
+ quads[0][1]->set_range(x_mid, x2, y1, y_mid);
+ quads[1][0]->set_range(x1, x_mid, y_mid, y2);
+ quads[1][1]->set_range(x_mid, x2, y_mid, y2);
+}
+
+void Terrain::track_down(double x, double y, double nz, int levels)
+{
+ if(levels>0)
+ {
+ int a=(x<x_mid)?0:1;
+ int b=(y<y_mid)?0:1;
+
+ if(!is_split())
+ split();
+
+ quads[b][a]->track_down(x, y, nz, levels-1);
+ }
+ else
+ {
+ z[0][0]=
+ z[0][1]=
+ z[1][1]=
+ z[1][0]=z_mean=nz;
+ }
+}
|