Made clouds rotate when vertex shaders are enabled.

src/celengine/render.cpp

@@ -2607,16 +2607,19 @@ void Renderer::renderObject(Point3f pos,
             glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
             glColor4f(1, 1, 1, 1);
 
-            if (useVertexPrograms)
+            if (vertexShaderEnabled)
             {
                 vp::enable();
-                vp::use(vp::diffuse);
+                vp::use(vp::diffuseTexOffset);
+                vp::parameter(41,
+                              (float) -pfmod(now * atmosphere->cloudSpeed / (2*PI), 1.0),
+                              0.0f, 0.0f, 0.0f);
             }
             lodSphere->render(Mesh::Normals | Mesh::TexCoords0,
                               viewFrustum,
                               ri.lod,
                               cloudTex);
-            if (useVertexPrograms)
+            if (vertexShaderEnabled)
             {
                 vp::disable();
             }

src/celengine/vertexprog.cpp

@@ -24,6 +24,7 @@ unsigned int vp::diffuseBump = 0;
 unsigned int vp::diffuseBumpHaze = 0;
 unsigned int vp::shadowTexture = 0;
 unsigned int vp::everything = 0;
+unsigned int vp::diffuseTexOffset = 0;
 
 
 static string* ReadTextFromFile(const string& filename)
@@ -90,6 +91,8 @@ bool vp::init()
         return false;
     if (!LoadVertexProgram("shaders/shadowtex.vp", shadowTexture))
         return false;
+    if (!LoadVertexProgram("shaders/diffuse_texoff.vp", diffuseTexOffset))
+        return false;
     everything = 0;
 
     EXTglTrackMatrixNV(GL_VERTEX_PROGRAM_NV,

src/celengine/vertexprog.h

@@ -32,6 +32,7 @@ namespace vp
     extern unsigned int diffuseBumpHaze;
     extern unsigned int everything;
     extern unsigned int shadowTexture;
+    extern unsigned int diffuseTexOffset;
 };
 
 #endif // _VERTEXPROG_H_