From cda8e426f609530062524bb43f103612d25cacc7 Mon Sep 17 00:00:00 2001
From: pixel <pixel>
Date: Mon, 2 Apr 2007 23:35:59 +0000
Subject: Adding gluLookAt and gluPerspective bindings to LuaGL.

---
 lib/LuaGL.cc | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'lib')

diff --git a/lib/LuaGL.cc b/lib/LuaGL.cc
index 19eb0b2..375be99 100644
--- a/lib/LuaGL.cc
+++ b/lib/LuaGL.cc
@@ -4544,6 +4544,42 @@ static int gl_viewport(lua_State *L)
    return 0;
 }
 
+/*LookAt (eyeX, eyeY, eyeZ, centerX, centerY, centerZ, upX, upY, upZ ) -> none*/
+static int gl_lookat(lua_State *L)
+{
+   /* test arguments type */
+   if(!( lua_isnumber(L, 1) && lua_isnumber(L, 2) &&
+         lua_isnumber(L, 3) && lua_isnumber(L, 4) &&
+         lua_isnumber(L, 5) && lua_isnumber(L, 6) &&
+         lua_isnumber(L, 7) && lua_isnumber(L, 8) &&
+         lua_isnumber(L, 9) ))
+      luaL_error(L, "incorrect argument to function 'gl.LookAt'");
+
+   /* call openGL function */
+   gluLookAt((GLdouble)lua_tonumber(L, 1), (GLdouble)lua_tonumber(L, 2),
+             (GLdouble)lua_tonumber(L, 3), (GLdouble)lua_tonumber(L, 4),
+             (GLdouble)lua_tonumber(L, 5), (GLdouble)lua_tonumber(L, 6),
+             (GLdouble)lua_tonumber(L, 7), (GLdouble)lua_tonumber(L, 8),
+             (GLdouble)lua_tonumber(L, 9));
+
+   return 0;
+}
+
+/*Perspective (eyeX, eyeY, eyeZ, centerX, centerY, centerZ, upX, upY, upZ ) -> none*/
+static int gl_perspective(lua_State *L)
+{
+   /* test arguments type */
+   if(!( lua_isnumber(L, 1) && lua_isnumber(L, 2) &&
+         lua_isnumber(L, 3) && lua_isnumber(L, 4) ))
+      luaL_error(L, "incorrect argument to function 'gl.Perspective'");
+
+   /* call openGL function */
+   gluPerspective((GLdouble)lua_tonumber(L, 1), (GLdouble)lua_tonumber(L, 2),
+                  (GLdouble)lua_tonumber(L, 3), (GLdouble)lua_tonumber(L, 4));
+
+   return 0;
+}
+
 static const luaL_reg gllib[] = {
   {"Accum", gl_accum},
   {"AlphaFunc", gl_alpha_func},
@@ -4683,6 +4719,8 @@ static const luaL_reg gllib[] = {
   {"Vertex", gl_vertex},
   {"VertexPointer", gl_vertex_pointer},
   {"Viewport", gl_viewport},
+  {"LookAt", gl_lookat},
+  {"Perspective", gl_perspective},
   {NULL, NULL}
 };
 
-- 
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