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-rw-r--r--calibrate.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/calibrate.c b/calibrate.c
index 71bdcab..67c1d27 100644
--- a/calibrate.c
+++ b/calibrate.c
@@ -138,6 +138,9 @@ void * GuiThread( void * v )
// g = (g * (5-buffertimeto[i][nn])) / 5 ;
// b = (b * (5-buffertimeto[i][nn])) / 5 ;
CNFGColor( (b<<16) | (g<<8) | r );
+
+ if (bufferpts[i*2+0][nn] == 0 || bufferpts[i*2+1][nn]==0) continue; //do not draw if aither coordinate is 0
+
CNFGTackRectangle( bufferpts[i*2+0][nn], bufferpts[i*2+1][nn], bufferpts[i*2+0][nn] + 5, bufferpts[i*2+1][nn] + 5 );
CNFGPenX = bufferpts[i*2+0][nn]; CNFGPenY = bufferpts[i*2+1][nn];
CNFGDrawText( buffermts, 2 );