From bdf2568e247af858c4a1ca8004d97f13fe9b8cb0 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 22 Sep 2007 17:01:48 +0000
Subject: [PATCH] Add projection functions Add enable/disable Blender exporter:
 Fix a deprecation warning

---
 mesh_export.py        |  5 ++--
 source/misc.cpp       | 14 +++++++++--
 source/misc.h         |  2 ++
 source/projection.cpp | 52 +++++++++++++++++++++++++++++++++++++++++
 source/projection.h   | 54 +++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 123 insertions(+), 4 deletions(-)
 create mode 100644 source/projection.cpp
 create mode 100644 source/projection.h

diff --git a/mesh_export.py b/mesh_export.py
index cdab35f3..6b50a4ec 100644
--- a/mesh_export.py
+++ b/mesh_export.py
@@ -9,6 +9,7 @@ Group: 'Export'
 
 import sys
 import math
+import bpy
 import Blender
 
 class Edge:
@@ -161,9 +162,9 @@ class Exporter:
 		return result
 
 	def export(self):
-		scene=Blender.Scene.GetCurrent()
+		scene=bpy.data.scenes.active
 
-		obj=scene.getActiveObject()
+		obj=scene.objects.active
 		if obj.getType()!="Mesh":
 			raise Exception, "Can only export Mesh data"
 
diff --git a/source/misc.cpp b/source/misc.cpp
index 67b2a142..9815383a 100644
--- a/source/misc.cpp
+++ b/source/misc.cpp
@@ -10,12 +10,22 @@ Distributed under the LGPL
 namespace Msp {
 namespace GL {
 
+void enable(GLenum state)
+{
+	glEnable(state);
+}
+
+void disable(GLenum state)
+{
+	glDisable(state);
+}
+
 void set(GLenum state, bool value)
 {
 	if(value)
-		glEnable(state);
+		enable(state);
 	else
-		glDisable(state);
+		disable(state);
 }
 
 } // namespace GL
diff --git a/source/misc.h b/source/misc.h
index 87690477..071875cd 100644
--- a/source/misc.h
+++ b/source/misc.h
@@ -13,6 +13,8 @@ Distributed under the LGPL
 namespace Msp {
 namespace GL {
 
+void enable(GLenum);
+void disable(GLenum);
 void set(GLenum, bool);
 
 } // namespace GL
diff --git a/source/projection.cpp b/source/projection.cpp
new file mode 100644
index 00000000..1b7fa61f
--- /dev/null
+++ b/source/projection.cpp
@@ -0,0 +1,52 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include <cmath>
+#include <GL/gl.h>
+#include "projection.h"
+
+namespace Msp {
+namespace GL {
+
+void ortho(double left, double right, double bottom, double top, double near, double far)
+{
+	glOrtho(left, right, bottom, top, near, far);
+}
+
+void ortho_centered(double width, double height)
+{
+	ortho(-width/2, width/2, -height/2, height/2, 0, 1);
+}
+
+void ortho_bottomleft(double width, double height)
+{
+	ortho(0, width, 0, height, 0, 1);
+}
+
+void ortho_topleft(double width, double height)
+{
+	ortho(0, width, -height, 0, 0, 1);
+}
+
+void frustum(double left, double right, double bottom, double top, double near, double far)
+{
+	glFrustum(left, right, bottom, top, near, far);
+}
+
+void frustum_centered(double width, double height, double near, double far)
+{
+	glFrustum(-width/2, width/2, -height/2, height/2, near, far);
+}
+
+void perspective(double fov_y, double aspect, double near, double far)
+{
+	double hh=tan(fov_y*M_PI/360)*near;
+	frustum(-hh*aspect, hh*aspect, -hh, hh, near, far);
+}
+
+} // namespace GL
+} // namespace Msp
diff --git a/source/projection.h b/source/projection.h
new file mode 100644
index 00000000..d38aa336
--- /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
-- 
2.43.0