From 9f2f503d3747533b6ea223829b998b1f0bd93c51 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Wed, 28 Oct 2015 18:59:35 +0100
Subject: [PATCH] Water: pass the near and far planes

---
 apps/openmw/mwrender/renderingmanager.cpp | 3 +++
 files/shaders/water_fragment.glsl         | 7 ++++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/apps/openmw/mwrender/renderingmanager.cpp b/apps/openmw/mwrender/renderingmanager.cpp
index b9132dc8c..dcf4406bb 100644
--- a/apps/openmw/mwrender/renderingmanager.cpp
+++ b/apps/openmw/mwrender/renderingmanager.cpp
@@ -198,6 +198,9 @@ namespace MWRender
         mFieldOfView = Settings::Manager::getFloat("field of view", "General");
         updateProjectionMatrix();
         mStateUpdater->setFogEnd(mViewDistance);
+
+        mRootNode->getOrCreateStateSet()->addUniform(new osg::Uniform("near", mNearClip));
+        mRootNode->getOrCreateStateSet()->addUniform(new osg::Uniform("far", mViewDistance));
     }
 
     RenderingManager::~RenderingManager()
diff --git a/files/shaders/water_fragment.glsl b/files/shaders/water_fragment.glsl
index 5860120ab..994d74964 100644
--- a/files/shaders/water_fragment.glsl
+++ b/files/shaders/water_fragment.glsl
@@ -68,6 +68,9 @@ uniform sampler2D normalMap;
                 
 uniform float osg_SimulationTime;
 
+uniform float near;
+uniform float far;
+
 void main(void)
 {
     // FIXME
@@ -160,10 +163,8 @@ void main(void)
 #if REFRACTION
     float refractionDepth = texture2D(refractionDepthMap, screenCoords-(normal.xy*REFR_BUMP)).x;
     // make linear
-    float zNear = 5; // FIXME
-    float zFar = 6666; // FIXME
     float z_n = 2.0 * refractionDepth - 1.0;
-    refractionDepth = 2.0 * zNear * zFar / (zFar + zNear - z_n * (zFar - zNear));
+    refractionDepth = 2.0 * near * far / (far + near - z_n * (far - near));
     
     float waterDepth = refractionDepth - depthPassthrough;