From 89e90cbd07402f824253fc0a4b2f1cd7e81b31e4 Mon Sep 17 00:00:00 2001
From: Ash Tyndall <git@atyndall.net>
Date: Fri, 21 Oct 2011 10:52:35 +0800
Subject: [PATCH]

---
 globals.c |  6 +++---
 globals.h |  6 +++---
 scene.c   | 36 ++++++------------------------------
 3 files changed, 12 insertions(+), 36 deletions(-)

diff --git a/globals.c b/globals.c
index b53163e..374d8b3 100644
--- a/globals.c
+++ b/globals.c
@@ -63,9 +63,6 @@ GLfloat far = 30;
 GLfloat nearClip = -200;
 GLfloat farClip = 200;
 
-/* Zoom factor for mouse movements */
-GLfloat zoomFactor = 1.0;
-
 /* Recursion level for floor drawing */
 int drawFloorRecurse = 8;
 
@@ -96,5 +93,8 @@ GLfloat ambient[] = {0.2, 0.2, 0.2, 1.0};
 GLfloat diffuse[] = {1.0, 0.8, 0.0, 1.0};
 GLfloat specular[] = {1.0, 1.0, 1.0, 1.0};
 
+/* Zoom and rotate tracking */
+GLfloat zoomFactor = 0.0, rotateFactor = 0.0;
+
 /* Beginning width, height */
 int width = 500, height = 500;
\ No newline at end of file
diff --git a/globals.h b/globals.h
index 4c7854a..dc92453 100644
--- a/globals.h
+++ b/globals.h
@@ -53,9 +53,6 @@ extern GLfloat far;
 extern GLfloat nearClip;
 extern GLfloat farClip;
 
-/* Zoom factor for mouse movements */
-extern GLfloat zoomFactor;
-
 /* Recursion level for floor drawing */
 extern int drawFloorRecurse;
 
@@ -89,4 +86,7 @@ extern GLfloat specular[];
 /* Beginning width, height */
 extern int width, height;
 
+/* Zoom and rotate tracking */
+GLfloat zoomFactor, rotateFactor;
+
 #endif	/* GLOBALS_H */
\ No newline at end of file
diff --git a/scene.c b/scene.c
index 642fdcd..c024bf1 100644
--- a/scene.c
+++ b/scene.c
@@ -206,16 +206,6 @@ void mouse(int button, int state, int x, int y) {
       moving = 0;
     }
   }
-  if (button == GLUT_MIDDLE_BUTTON) {
-    if (state == GLUT_DOWN) {
-      lightMoving = 1;
-      lightStartX = x;
-      lightStartY = y;
-    }
-    if (state == GLUT_UP) {
-      lightMoving = 0;
-    }
-  }
 }
 
 /**
@@ -266,19 +256,12 @@ void keyboard(unsigned char key, int x, int y) {
  */
 void motion(int x, int y) {
   if (moving) {
-    angle = angle + (x - startx);
-    angle2 = angle2 + (y - starty);
+    zoomFactor += (x - startx);
+    rotateFactor += (y - starty);
     startx = x;
     starty = y;
     glutPostRedisplay();
   }
-  if (lightMoving) {
-    lightAngle += (x - lightStartX)/40.0;
-    lightHeight += (lightStartY - y)/20.0;
-    lightStartX = x;
-    lightStartY = y;
-    glutPostRedisplay();
-  }
 }
 
 /**
@@ -309,26 +292,19 @@ void display() {
   glLoadIdentity();
 
   gluLookAt(
-    0.0,  0.0,  5.0,  /* eye is at (x,y,z) */
+    0.0,  0.0,  5.0 + zoomFactor,  /* 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 */
     );
 
   glRotatef(75.0, 1.0, 0.0, 0.0);
 
-  /* Reposition the light source. */
-  lightPosition[0] = 12*cos(lightAngle);
-  lightPosition[1] = lightHeight;
-  lightPosition[2] = 12*sin(lightAngle);
-  lightPosition[3] = 0.0;
-
   glPushMatrix();
 
     /* Perform scene rotations based on user mouse/keyboard input. */
-    glRotatef(angle, 0.0, 1.0, 0.0);
-    glRotatef(angle2, 1.0, 0.0, 0.0);
-    glTranslatef(camx, camy, camz);
-    glRotatef(rot, 1.0, 0.0, 0.0);
+    glRotatef(rotateFactor, 0.0, 0.0, 1.0);
+    //glTranslatef(camx, camy, camz);
+    //glRotatef(rot, 1.0, 0.0, 0.0);
 
     glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
 
-- 
2.20.1