From 72bc00fc628468d4d56c03f8aaf513fcf1d406bf Mon Sep 17 00:00:00 2001
From: Ahmet Inan <xdsopl@googlemail.com>
Date: Thu, 8 Jan 2015 14:27:32 +0100
Subject: [PATCH] fixed rainbow

---
 app/src/main/rs/stft.rsh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/app/src/main/rs/stft.rsh b/app/src/main/rs/stft.rsh
index 012c463..7b3c205 100644
--- a/app/src/main/rs/stft.rsh
+++ b/app/src/main/rs/stft.rsh
@@ -27,9 +27,9 @@ limitations under the License.
 static inline uchar4 rainbow(float v)
 {
 #if 1
-    float r = 4.0f * v - 2.0f;
-    float g = 2.0f - 4.0f * fabs(v - 0.5f);
-    float b = 2.0f - 4.0f * v;
+    float r = clamp(4.0f * v - 2.0f, 0.0f, 1.0f);
+    float g = clamp(2.0f - 4.0f * fabs(v - 0.5f), 0.0f, 1.0f);
+    float b = clamp(2.0f - 4.0f * v, 0.0f, 1.0f);
 #else
     float r = v;
     float g = v;