1 files changed, 11 insertions, 0 deletions

diff --git a/js/helper-classes/RDGE/GLMaterial.js b/js/helper-classes/RDGE/GLMaterial.js
index c633f679..07a98ab5 100644
--- a/js/helper-classes/RDGE/GLMaterial.js
+++ b/js/helper-classes/RDGE/GLMaterial.js
@@ -31,6 +31,11 @@ function GLMaterial( world )
 
         this._texture;
 
+        // vertex deformation variables
+        this._hasVertexDeformation = false;
+        this._vertexDeformationRange = [0, 0, 1, 1];    // (xMin, yMin, xMax, yMax)
+        this._vertexDeformationTolerance = 0.05;
+
         // RDGE variables
         this._shader;
         this._materialNode;
@@ -66,6 +71,12 @@ function GLMaterial( world )
         // Any material needing continuous rendering should override this method
         this.isAnimated                 = function()                    {  return false;                                        }
 
+        // the vertex shader can apply deformations requiring refinement in
+        // certain areas.
+        this.hasVertexDeformation                       = function()    {  return this._hasVertexDeformation;                   }
+        this.getVertexDeformationRange          = function()    {  return this._vertexDeformationRange.slice();                 }       
+        this.getVertexDeformationTolerance      = function()    {  return this._vertexDeformationTolerance;             }
+
 
     ///////////////////////////////////////////////////////////////////////
     // Common Material Methods