X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fclipping.cpp;fp=source%2Fcore%2Fclipping.cpp;h=3bdeee3ca8b3367624504f9815338f1810c4dcb9;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/core/clipping.cpp b/source/core/clipping.cpp
new file mode 100644
index 00000000..3bdeee3c
--- /dev/null
+++ b/source/core/clipping.cpp
@@ -0,0 +1,85 @@
+#include <msp/gl/extensions/msp_clipping.h>
+#include "clipping.h"
+#include "clipplane.h"
+#include "matrix.h"
+#include "misc.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+unsigned Clipping::get_n_attach_points()
+{
+	static Require _req(MSP_clipping);
+	static int count = get_i(GL_MAX_CLIP_PLANES);
+	return count;
+}
+
+void Clipping::attach(unsigned i, const ClipPlane &p)
+{
+	if(i>=get_n_attach_points())
+		throw out_of_range("Clipping::attach");
+
+	if(i>=planes.size())
+		planes.resize(i+1);
+
+	planes[i] = &p;
+	if(current()==this)
+		glEnable(GL_CLIP_PLANE0+i);
+}
+
+void Clipping::detach(unsigned i)
+{
+	if(i>=planes.size())
+		return;
+
+	planes[i] = 0;
+	if(current()==this)
+		disable(GL_CLIP_PLANE0+i);
+}
+
+void Clipping::update_shader_data(ProgramData &shdata, const Matrix &view_matrix) const
+{
+	Matrix view_inverse = invert(view_matrix);
+	for(unsigned i=0; i<planes.size(); ++i)
+		if(planes[i])
+			planes[i]->update_shader_data(shdata, view_inverse, i);
+}
+
+void Clipping::bind() const
+{
+	static Require _req(MSP_clipping);
+
+	const Clipping *old = current();
+	if(!set_current(this))
+		return;
+
+	for(unsigned i=0; i<planes.size(); ++i)
+	{
+		if(planes[i])
+			enable(GL_CLIP_PLANE0+i);
+		else
+			disable(GL_CLIP_PLANE0+i);
+	}
+
+	if(old)
+	{
+		for(unsigned i=planes.size(); i<old->planes.size(); ++i)
+			disable(GL_CLIP_PLANE0+i);
+	}
+}
+
+void Clipping::unbind()
+{
+	const Clipping *old = current();
+	if(!set_current(0))
+		return;
+
+	for(unsigned i=0; i<old->planes.size(); ++i)
+		if(old->planes[i])
+			disable(GL_CLIP_PLANE0+i);
+}
+
+} // namespace GL
+} // namespace Msp