1 files changed, 111 insertions, 0 deletions
diff --git a/tradeshow/enterprise-kinectdatavis/Noise.qml b/tradeshow/enterprise-kinectdatavis/Noise.qml
new file mode 100644
index 0000000..eace7c2
--- /dev/null
+++ b/tradeshow/enterprise-kinectdatavis/Noise.qml
@@ -0,0 +1,111 @@
+/*
+Copyright (C) 2011 by Ashima Arts (Simplex noise)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+import QtQuick 2.1
+
+ShaderEffect {
+    property real time
+    NumberAnimation on time {
+        loops: Animation.Infinite
+        duration: 1000
+        from: 30
+        to: 200
+    }
+    vertexShader: "
+        uniform highp mat4 qt_Matrix;
+        attribute highp vec4 qt_Vertex;
+        attribute highp vec2 qt_MultiTexCoord0;
+        varying highp vec2 coord;
+        void main() {
+            coord = qt_MultiTexCoord0;
+            gl_Position = qt_Matrix * qt_Vertex;
+        }"
+    fragmentShader: "
+        varying highp vec2 coord;
+        uniform lowp float qt_Opacity;
+        uniform highp float time;
+        uniform lowp float width;
+        uniform lowp float height;
+
+        vec3 mod289(vec3 x) {
+            return x - floor(x * (1.0 / 289.0)) * 289.0;
+        }
+        vec2 mod289(vec2 x) {
+            return x - floor(x * (1.0 / 289.0)) * 289.0;
+        }
+        vec3 permute(vec3 x) {
+            return mod289(((x*34.0)+1.0)*x);
+        }
+        float snoise(vec2 v)
+        {
+            const vec4 C = vec4(0.211324865405187,  // (3.0-sqrt(3.0))/6.0
+                                0.366025403784439,  // 0.5*(sqrt(3.0)-1.0)
+                               -0.577350269189626,  // -1.0 + 2.0 * C.x
+                                0.024390243902439); // 1.0 / 41.0
+            // First corner
+            vec2 i  = floor(v + dot(v, C.yy) );
+            vec2 x0 = v -   i + dot(i, C.xx);
+
+            // Other corners
+            vec2 i1;
+            //i1.x = step( x0.y, x0.x ); // x0.x > x0.y ? 1.0 : 0.0
+            //i1.y = 1.0 - i1.x;
+            i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);
+            // x0 = x0 - 0.0 + 0.0 * C.xx ;
+            // x1 = x0 - i1 + 1.0 * C.xx ;
+            // x2 = x0 - 1.0 + 2.0 * C.xx ;
+            vec4 x12 = x0.xyxy + C.xxzz;
+            x12.xy -= i1;
+
+            // Permutations
+            i = mod289(i); // Avoid truncation effects in permutation
+            vec3 p = permute( permute( i.y + vec3(0.0, i1.y, 1.0 ))
+            + i.x + vec3(0.0, i1.x, 1.0 ));
+
+            vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0);
+            m = m*m ;
+            m = m*m ;
+
+            // Gradients: 41 points uniformly over a line, mapped onto a diamond.
+            // The ring size 17*17 = 289 is close to a multiple of 41 (41*7 = 287)
+            vec3 x = 2.0 * fract(p * C.www) - 1.0;
+            vec3 h = abs(x) - 0.5;
+            vec3 ox = floor(x + 0.5);
+            vec3 a0 = x - ox;
+
+            // Normalise gradients implicitly by scaling m
+            // Approximation of: m *= inversesqrt( a0*a0 + h*h );
+            m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );
+
+            // Compute final noise value at P
+            vec3 g;
+            g.x  = a0.x  * x0.x  + h.x  * x0.y;
+            g.yz = a0.yz * x12.xz + h.yz * x12.yw;
+            return 130.0 * dot(m, g);
+        }
+
+        void main() {
+            float n = snoise((coord + vec2(mod(time, 12.12), 0.0)) * (vec2(width, height) / 5.0));
+            n = n * 0.6 + 0.4;
+            gl_FragColor = vec4(n, n, n, 1.0) * qt_Opacity;
+        }"
+}