From 331d4116d904bd36381df70a1c2520375f5ae636 Mon Sep 17 00:00:00 2001
From: Philip Rosedale <philip@coffeeandpower.com>
Date: Tue, 7 May 2013 11:14:12 -0700
Subject: [PATCH] Finished noiseTest example (in util.h) that uses Perlin noise
 to draw a bitmap in 2D.

---
 interface/src/Util.cpp | 7 ++++---
 interface/src/main.cpp | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/interface/src/Util.cpp b/interface/src/Util.cpp
index 58cf1f61ad..b4c7f3d6b0 100644
--- a/interface/src/Util.cpp
+++ b/interface/src/Util.cpp
@@ -115,16 +115,17 @@ void drawVector(glm::vec3 * vector) {
 
 //  Render a 2D set of squares using perlin/fractal noise
 void noiseTest(int w, int h) {
-    const float CELLS = 100;
+    const float CELLS = 500;
+    const float NOISE_SCALE = 10.0;
     float xStep = (float) w / CELLS;
     float yStep = (float) h / CELLS;
     glBegin(GL_QUADS);    
     for (float x = 0; x < (float)w; x += xStep) {
         for (float y = 0; y < (float)h; y += yStep) {
             //  Generate a vector varying between 0-1 corresponding to the screen location 
-            glm::vec2 position(x / (float) w, y / (float) h);
+            glm::vec2 position(NOISE_SCALE * x / (float) w, NOISE_SCALE * y / (float) h);
             //  Set the cell color using the noise value at that location
-            float color = glm::simplex(position);
+            float color = glm::perlin(position);
             glColor4f(color, color, color, 1.0);
             glVertex2f(x, y);
             glVertex2f(x + xStep, y);
diff --git a/interface/src/main.cpp b/interface/src/main.cpp
index a341835206..a448a1c2fa 100644
--- a/interface/src/main.cpp
+++ b/interface/src/main.cpp
@@ -893,7 +893,7 @@ void displayOverlay() {
         audioScope.render();
         #endif
 
-       // noiseTest(WIDTH, HEIGHT);
+       //noiseTest(WIDTH, HEIGHT);
     
         if (displayHeadMouse && !::lookingInMirror && statsOn) {
             //  Display small target box at center or head mouse target that can also be used to measure LOD