Model Renderer|Scripting: Animated uniform variables for model shaders

Each MobjAnimator now has its own set of uniform variables that are
passed to the model shader. The uniform variables are declared in
the asset metadata, and can be animated using Doomsday Script's
native Core.Animation methods.

Also cleaned up MobjAnimator a little internally.

doomsday/apps/client/include/render/mobjanimator.h

@@ -21,6 +21,7 @@
 
 #include "render/modelrenderer.h"
 #include <de/ModelDrawable>
+#include <de/GLProgram>
 
 /**
  * Mobj-specific model animator.
@@ -29,6 +30,9 @@
  */
 class MobjAnimator : public de::ModelDrawable::Animator
 {
+public:
+    DENG2_ERROR(DefinitionError);
+
 public:
     MobjAnimator(de::DotPath const &id, de::ModelDrawable const &model);
 
@@ -38,6 +42,10 @@ class MobjAnimator : public de::ModelDrawable::Animator
 
     de::ddouble currentTime(int index) const;
 
+    void bindUniforms(de::GLProgram &program) const;
+
+    void unbindUniforms(de::GLProgram &program) const;
+
 private:
     DENG2_PRIVATE(d)
 };

doomsday/apps/client/include/render/rend_model.h

@@ -29,6 +29,7 @@
 #include <de/ModelDrawable>
 
 class TextureVariantSpec;
+class MobjAnimator;
 struct vissprite_t;
 
 /// Absolute maximum number of vertices per submodel supported by this module.
@@ -65,7 +66,7 @@ struct drawmodel2params_t
     struct mobj_s const *object;
     de::ModelDrawable const *model;
     ModelRenderer::AuxiliaryData const *auxData;
-    de::ModelDrawable::Animator const *animator;
+    MobjAnimator const *animator;
 };
 
 DENG_EXTERN_C de::dbyte useModels;

doomsday/apps/client/include/render/vissprite.h

@@ -194,7 +194,7 @@ struct vispsprite_t
         struct vispsprite_model2_s {
             de::ModelDrawable const *model;
             ModelAuxiliaryData const *auxData;
-            de::ModelDrawable::Animator const *animator;
+            MobjAnimator const *animator;
         } model2;
     } data;
 };

doomsday/apps/client/include/world/clientmobjthinkerdata.h

@@ -52,6 +52,8 @@
 //#define CLM_MAGIC1          0xdecafed1
 //#define CLM_MAGIC2          0xcafedeb8
 
+class MobjAnimator;
+
 /**
  * Private client-side data for mobjs. This includes any per-object state for rendering
  * and client-side network state.
@@ -102,9 +104,9 @@ class ClientMobjThinkerData : public MobjThinkerData
      *
      * @return Animation state, or @c NULL if not drawn as a model.
      */
-    de::ModelDrawable::Animator *animator();
+    MobjAnimator *animator();
 
-    de::ModelDrawable::Animator const *animator() const;
+    MobjAnimator const *animator() const;
 
     de::Matrix4f const &modelTransformation() const;