From 4cb986b3f90ef7d3b05d2fdb11b7479cd3a4da63 Mon Sep 17 00:00:00 2001
From: ZappoMan <bradh@konamoxt.com>
Date: Sat, 13 Apr 2013 13:09:20 -0700
Subject: [PATCH] tweaks to ViewFrustum's default FOV, added comments

---
 libraries/voxels/src/ViewFrustum.cpp | 11 ++++++++++-
 libraries/voxels/src/ViewFrustum.h   |  2 ++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/libraries/voxels/src/ViewFrustum.cpp b/libraries/voxels/src/ViewFrustum.cpp
index 2d3899648d..d7e87d36b3 100644
--- a/libraries/voxels/src/ViewFrustum.cpp
+++ b/libraries/voxels/src/ViewFrustum.cpp
@@ -10,6 +10,8 @@
 
 #include "ViewFrustum.h"
 
+float ViewFrustum::fovAngleAdust=1.75;
+
 ViewFrustum::ViewFrustum(glm::vec3 position, glm::vec3 direction, 
 		glm::vec3 up, glm::vec3 right, float screenWidth, float screenHeight) {
 	this->calculateViewFrustum(position, direction, up, right, screenWidth, screenHeight);
@@ -36,7 +38,14 @@ void ViewFrustum::calculateViewFrustum(glm::vec3 position, glm::vec3 direction,
 	this->_screenHeight = screenHeight;
 	
 	glm::vec3 front    = direction;
-	float fovHalfAngle = 0.7854f * 1.5; // 45 deg and some hackery. Still trying to figure out our correct fov
+	
+	// Calculating field of view.
+	//    0.7854f is 45 deg
+	//    ViewFrustum::fovAngleAdust defaults to 1.75
+	// Apparently our fov is around 1.75 times this value or 78.75 degrees
+	// you can adjust this in interface by using the "|" and "\" keys to tweak
+	// the adjustment and see effects of different FOVs
+	float fovHalfAngle = 0.7854f * ViewFrustum::fovAngleAdust; 
 	float ratio        = screenWidth / screenHeight;
 	
 	this->_nearDist = 0.1;
diff --git a/libraries/voxels/src/ViewFrustum.h b/libraries/voxels/src/ViewFrustum.h
index 02c7c39bcc..9fb17ae339 100644
--- a/libraries/voxels/src/ViewFrustum.h
+++ b/libraries/voxels/src/ViewFrustum.h
@@ -61,6 +61,8 @@ public:
 		glm::vec3 up, glm::vec3 right, float screenWidth, float screenHeight);
 	
 	void dump();
+	
+	static float fovAngleAdust;
 };