Add projection functions

[libs/gl.git] / source / projection.h

diff --git a/source/projection.h b/source/projection.h
new file mode 100644 (file)
index 0000000..d38aa33
--- /dev/null
+++ b/source/projection.h
@@ -0,0 +1,54 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_GL_PROJECTION_H_
+#define MSP_GL_PROJECTION_H_
+
+namespace Msp {
+namespace GL {
+
+/**
+Sets up an orthogonal projection.
+*/
+void ortho(double, double, double, double, double, double);
+
+/**
+Sets up an orthogonal projection, with origin at the center of the screen.
+*/
+void ortho_centered(double, double);
+
+/**
+Sets up an orthogonal projection, with origin at the bottom left corner of the
+screen.
+*/
+void ortho_bottomleft(double, double);
+
+/**
+Sets up an orthogonal projection, with origin at the top left corner of the
+screen.  The Y coordinate is reversed and grows downwards.
+*/
+void ortho_topleft(double, double);
+
+/**
+Sets up a perspective projection.
+*/
+void frustum(double, double, double, double, double, double);
+
+/**
+Sets up a perspective projection, with origin at the center of the screen.
+*/
+void frustum_centered(double width, double height, double near, double far);
+
+/**
+Sets up a centered perspective projection in a simple way.
+*/
+void perspective(double fov_y, double aspect, double near, double far);
+
+} // namespace GL
+} // namespace Msp
+
+#endif