From 9db97251872a73e70cff9986aa5d8d3ef360766d Mon Sep 17 00:00:00 2001
From: josh <josh@bd8a9e45-a331-0410-811e-c64571078777>
Date: Wed, 30 Jan 2008 03:59:59 +0000
Subject: [PATCH] zoom support

git-svn-id: svn://anubis/misc/wfobj-view@31 bd8a9e45-a331-0410-811e-c64571078777
---
 wfobj-view.cc | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/wfobj-view.cc b/wfobj-view.cc
index 42ba000..ce11b28 100644
--- a/wfobj-view.cc
+++ b/wfobj-view.cc
@@ -3,6 +3,8 @@
 #include <SDL/SDL.h>
 #include <GL/gl.h>
 #include <GL/glu.h>
+#include <iostream>
+using namespace std;
 
 /* Some definitions */
 #define WIDTH 800
@@ -13,6 +15,7 @@
 float	rotationMatrix[16];
 int	startx, starty;
 bool dragging = false;
+float dist = 5.0;
 
 void initgl(void)
 {
@@ -27,8 +30,8 @@ void initgl(void)
 	glViewport(0, 0, WIDTH, HEIGHT);
 	glMatrixMode(GL_PROJECTION);
 	glLoadIdentity();
-	gluPerspective(60.0, (GLfloat)WIDTH/(GLfloat)WIDTH, 1.0, 30.0);
-	gluLookAt(0, -4.0, 0, 0, 0, 0, 0, 0, 1);
+	gluPerspective(60.0, (GLfloat)WIDTH/(GLfloat)WIDTH, 0.01, 10000.0);
+	gluLookAt(0, -dist, 0, 0, 0, 0, 0, 0, 1);
 	glMatrixMode(GL_MODELVIEW);
 	glLoadIdentity();
 	glGetFloatv(GL_MODELVIEW_MATRIX, rotationMatrix);
@@ -92,6 +95,28 @@ int	main(int argc, char * argv[])
 					starty = event.button.y;
 				}
 			}
+			else if (event.button.button == 4)
+			{
+				dist *= 0.85;
+				if (dist < 1.0f)
+					dist = 1.0f;
+				glMatrixMode(GL_PROJECTION);
+				glLoadIdentity();
+				gluPerspective(60.0, (GLfloat)WIDTH/(GLfloat)WIDTH, 0.01, 10000.0);
+				gluLookAt(0, -dist, 0, 0, 0, 0, 0, 0, 1);
+				glMatrixMode(GL_MODELVIEW);
+				display();
+			}
+			else if (event.button.button == 5)
+			{
+				dist *= 1.2;
+				glMatrixMode(GL_PROJECTION);
+				glLoadIdentity();
+				gluPerspective(60.0, (GLfloat)WIDTH/(GLfloat)WIDTH, 0.01, 10000.0);
+				gluLookAt(0, -dist, 0, 0, 0, 0, 0, 0, 1);
+				glMatrixMode(GL_MODELVIEW);
+				display();
+			}
 		}
 		else if (event.type == SDL_MOUSEBUTTONUP)
 		{