From 44ec9b4f98ea308b37f5d43d0974818e5ac8fdb8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luis=20Pe=C3=B1aranda?= <luisp@impa.br>
Date: Mon, 19 Aug 2013 14:26:36 -0300
Subject: [PATCH] very minor

---
 openglcanvas.cpp           | 1 -
 shaders/vertex_shader.vert | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/openglcanvas.cpp b/openglcanvas.cpp
index 0b4ce7e..16097fa 100644
--- a/openglcanvas.cpp
+++ b/openglcanvas.cpp
@@ -505,7 +505,6 @@ void OpenGLCanvas::vertex_transformation(float *positions, int m, int n, float c
                 positions[3*(j+i*n)+2] = z;
             }
 
-            // perspective
             if (visualization=="Zorin-Barr"){
                 // perspective
                 u = x/(-z);
diff --git a/shaders/vertex_shader.vert b/shaders/vertex_shader.vert
index 26a58d7..964f1c3 100644
--- a/shaders/vertex_shader.vert
+++ b/shaders/vertex_shader.vert
@@ -71,8 +71,8 @@ void main(void){
     else if (vis_mode==3.0) // Equi-Rectangular
         gl_Position = vec4(lambda,phi,z,1.0);
     else if (vis_mode==4.0) { // Stereographic
-        u = 2.f*x/(-z+1);
-        v = 2.f*y/(-z+1);
+        u = 2.0*x/(-z+1.0);
+        v = 2.0*y/(-z+1.0);
         gl_Position = vec4(u/extent,v/extent,z,1.0);
     }
     else if (vis_mode==5.0) { // Mercator
-- 
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