From bf3cf131a6c4b18ca07a2a85156c063ff3bdcd04 Mon Sep 17 00:00:00 2001
From: Ash Tyndall <git@atyndall.net>
Date: Thu, 20 Oct 2011 11:56:13 +0800
Subject: [PATCH]

---
 globals.c |  2 +-
 globals.h |  2 +-
 scene.c   | 29 +++++++++++++++++++----------
 3 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/globals.c b/globals.c
index 56b8d1a..03d2f6f 100644
--- a/globals.c
+++ b/globals.c
@@ -73,7 +73,7 @@ int drawFloorRecurse = 5;
 int floorSize = 200;
 
 /* Current camera x, y, z coords */
-GLfloat x = 0.0, y = 0.0, z = 0.0;
+GLfloat camx = 0.0, camy = 0.0, camz = 0.0;
 
 /* Light 0 parameters */
 GLfloat diffuse0[] = {1.0, 1.0, 1.0, 1.0};
diff --git a/globals.h b/globals.h
index 04841f8..d856c57 100644
--- a/globals.h
+++ b/globals.h
@@ -63,7 +63,7 @@ extern int drawFloorRecurse;
 extern int floorSize;
 
 /* Current camera position */
-extern GLfloat x, y, z;
+extern GLfloat camx, camy, camz;
 
 /* Light 0 parameters */
 extern GLfloat diffuse0[];
diff --git a/scene.c b/scene.c
index a988ca8..9c6d0c4 100644
--- a/scene.c
+++ b/scene.c
@@ -226,28 +226,37 @@ void mouse(int button, int state, int x, int y) {
   }
 }
 
-void keyboard(unsigned char key, int x1, int y1) {
+/**
+ * Keybord event handler
+ * w/s increase/decrease the z
+ * a/d increase/decrease the x
+ * q/e increase/decrease the y
+ * @param key Key pressed
+ * @param x x co-ordinate of mouse
+ * @param y y co-ordinate of mouse
+ */
+void keyboard(unsigned char key, int x, int y) {
   switch(key) {
     case 'w':
-      z = z - 1;
+      camz = camz - 1;
       break;
     case 'a':
-      x = x - 1;
+      camx = camx - 1;
       break;
     case 's':
-      z = z + 1;
+      camz = camz + 1;
       break;
     case 'd':
-      x = x + 1;
+      camx = camx + 1;
       break;
     case 'q':
-      y = y + 1;
+      camy = camy + 1;
       break;
     case 'e':
-      y = y - 1;
+      camy = camy - 1;
       break;
   }
-  printf("Camera is now at (%f, %f, %f)\n", x, y, z);
+  printf("Camera is now at (%f, %f, %f)\n", camx, camy, camz);
   glutPostRedisplay();
 }
 
@@ -282,10 +291,10 @@ void display() {
   gluLookAt(
     0.0, 0.0, 10.0,  /* eye is at (x,y,z) */
     0.0, 0.0,  0.0,  /* center is at (x,y,z) */
-    0.0, 1.0,  0.0   /* up is in postivie Y direction */
+    0.0, -1.0,  0.0   /* up is in postivie Y direction */
     );
 
-  glTranslatef(x, y, z);
+  glTranslatef(camx, camy, camz);
   
   // **NOTE: Currently this rotation function is all that moves the camera off
   //         the flat surface. Need to integrate function into gluLookAt
-- 
2.20.1