Fix an incorrect negation

[libs/gl.git] / source / clipplane.cpp

diff --git a/source/clipplane.cpp b/source/clipplane.cpp
index 04bd6acfa817233a7c9ab291fb8f2a2cd64f73af..21df0d17e36e1dc63567de245649e8634f03fd11 100644 (file)
--- a/source/clipplane.cpp
+++ b/source/clipplane.cpp
@@ -1,3 +1,5 @@
+#include <msp/gl/extensions/msp_clipping.h>
+#include <msp/gl/extensions/msp_legacy_features.h>
 #include <msp/strings/format.h>
 #include "clipplane.h"
 #include "clipunit.h"
@@ -49,6 +51,9 @@ void ClipPlane::update_shader_data(ProgramData &shdata, const Matrix &view_inver
 
 void ClipPlane::bind_to(unsigned i) const
 {
+       Require _req(MSP_clipping);
+       Require _req2(MSP_legacy_features);
+
        ClipUnit &unit = ClipUnit::get_unit(i);
        if(unit.set_plane(this))
        {