Added GPU SoftBody constraint solvers for DirectX 11 (Direct Compute) and OpenCL, thanks to AMD.

See also http://code.google.com/p/bullet/issues/detail?id=390
Added Demos/DX11ClothDemo
(an OpenCL cloth demo will follow soon)

Demos/DX11ClothDemo/Media/UI/DXUTShared.fx

@@ -0,0 +1,69 @@
+//--------------------------------------------------------------------------------------
+// File: DXUTShared.fx
+//
+// 
+// 
+// Copyright (c) Microsoft Corporation. All rights reserved.
+//--------------------------------------------------------------------------------------
+
+
+//--------------------------------------------------------------------------------------
+// Global variables
+//--------------------------------------------------------------------------------------
+float4 g_MaterialDiffuseColor;      // Material's diffuse color
+float3 g_LightDir;                  // Light's direction in world space
+float4x4 g_mWorld;                  // World matrix for object
+float4x4 g_mWorldViewProjection;    // World * View * Projection matrix
+
+
+
+//--------------------------------------------------------------------------------------
+// Vertex shader output structure
+//--------------------------------------------------------------------------------------
+struct VS_OUTPUT
+{
+    float4 Position   : POSITION;   // vertex position 
+    float4 Diffuse    : COLOR0;     // vertex diffuse color 
+};
+
+
+//--------------------------------------------------------------------------------------
+// This shader computes standard transform and lighting
+//--------------------------------------------------------------------------------------
+VS_OUTPUT RenderWith1LightNoTextureVS( float4 vPos : POSITION, 
+                                       float3 vNormal : NORMAL )
+{
+    VS_OUTPUT Output;
+  
+    // Transform the position from object space to homogeneous projection space
+    Output.Position = mul(vPos, g_mWorldViewProjection);
+    
+    // Transform the normal from object space to world space    
+    float3 vNormalWorldSpace;
+    vNormalWorldSpace = normalize(mul(vNormal, (float3x3)g_mWorld)); // normal (world space)
+    
+    // Compute simple directional lighting equation
+    Output.Diffuse.rgb = g_MaterialDiffuseColor * max(0,dot(vNormalWorldSpace, g_LightDir));   
+    Output.Diffuse.a = 1.0f; 
+    
+    return Output;    
+}
+
+
+//--------------------------------------------------------------------------------------
+float4 RenderWith1LightNoTexturePS( float4 Diffuse : COLOR0 ) : COLOR0
+{ 
+    return Diffuse;
+}
+
+
+//--------------------------------------------------------------------------------------
+technique RenderWith1LightNoTexture
+{
+    pass P0
+    {          
+        VertexShader = compile vs_1_1 RenderWith1LightNoTextureVS();
+        PixelShader  = compile ps_1_1 RenderWith1LightNoTexturePS(); 
+    }
+}
+