Initial revision

progs/util/idproj.c

@@ -0,0 +1,26 @@
+/* idproj.c */
+
+
+/*
+ * Setup an identity projection such that glVertex(x,y) maps to
+ * window coordinate (x,y).
+ *
+ * Written by Brian Paul and in the public domain.
+ */
+
+
+
+
+
+void IdentityProjection( GLint x, GLint y, GLsizei width, GLsizei height )
+{
+   glViewport( x, y, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( (GLdouble) x, (GLdouble) y,
+            (GLdouble) width, (GLdouble) height,
+            -1.0, 1.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+