Allow modifing of the tess factor with keys a and y

jme3-examples/src/main/java/jme3test/material/TestTessellationShader.java

@@ -1,6 +1,9 @@
 package jme3test.material;
 
 import com.jme3.app.SimpleApplication;
+import com.jme3.input.KeyInput;
+import com.jme3.input.controls.AnalogListener;
+import com.jme3.input.controls.KeyTrigger;
 import com.jme3.material.Material;
 import com.jme3.scene.Geometry;
 import com.jme3.scene.Mesh;
@@ -8,27 +11,55 @@ import com.jme3.scene.VertexBuffer;
 import com.jme3.scene.shape.Quad;
 import com.jme3.util.BufferUtils;
 
+import java.util.concurrent.Callable;
+
 /**
  * Created by michael on 28.02.15.
  */
 public class TestTessellationShader extends SimpleApplication {
+    Material tessellationMaterial;
+    int tessFactor=5;
     @Override
     public void simpleInitApp() {
-        Material material = new Material(getAssetManager(), "Materials/Tess/SimpleTess.j3md");
-        material.setInt("TessellationFactor", 5);
-        material.getAdditionalRenderState().setWireframe(true);
+        tessellationMaterial = new Material(getAssetManager(), "Materials/Tess/SimpleTess.j3md");
+        tessellationMaterial.setInt("TessellationFactor", tessFactor);
+        tessellationMaterial.getAdditionalRenderState().setWireframe(true);
         Quad quad = new Quad(10, 10);
         quad.clearBuffer(VertexBuffer.Type.Index);
         quad.setBuffer(VertexBuffer.Type.Index, 4, BufferUtils.createIntBuffer(0, 1, 2, 3));
         quad.setMode(Mesh.Mode.Patch);
         quad.setPatchVertexCount(4);
         Geometry geometry = new Geometry("tessTest", quad);
-        geometry.setMaterial(material);
+        geometry.setMaterial(tessellationMaterial);
         rootNode.attachChild(geometry);
 
-        Geometry geometry1 = new Geometry("Demo", new Quad(2, 2));
-        geometry1.setMaterial(new Material(getAssetManager(),"Common/MatDefs/Misc/Unshaded.j3md"));
-        rootNode.attachChild(geometry1);
+        getInputManager().addMapping("TessUp", new KeyTrigger(KeyInput.KEY_A));
+        getInputManager().addMapping("TessDo", new KeyTrigger(KeyInput.KEY_Y));
+        getInputManager().addListener(new AnalogListener() {
+            @Override
+            public void onAnalog(String name, float value, float tpf) {
+                if(name.equals("TessUp")){
+                    tessFactor++;
+                    enqueue(new Callable<Boolean>() {
+                        @Override
+                        public Boolean call() throws Exception {
+                            tessellationMaterial.setInt("TessellationFactor",tessFactor);
+                            return true;
+                        }
+                    });
+                }
+                if(name.equals("TessDo")){
+                    tessFactor--;
+                    enqueue(new Callable<Boolean>() {
+                        @Override
+                        public Boolean call() throws Exception {
+                            tessellationMaterial.setInt("TessellationFactor",tessFactor);
+                            return true;
+                        }
+                    });
+                }
+            }
+        },"TessUp","TessDo");
     }
 
     public static void main(String[] args) {

jme3-testdata/src/main/resources/Materials/Tess/SimpleTess.tseval

@@ -2,16 +2,16 @@ layout(vertices=4) out;
 out gl_PerVertex{
   vec4 gl_Position;
 }gl_out[];
-uniform int mTessellationFactor;
+uniform int m_TessellationFactor;
 void main(){
     if (gl_InvocationID == 0){
-        gl_TessLevelOuter[0]=5;
-        gl_TessLevelOuter[1]=5;
-        gl_TessLevelOuter[2]=5;
-        gl_TessLevelOuter[3]=5;
+        gl_TessLevelOuter[0]=m_TessellationFactor;
+        gl_TessLevelOuter[1]=m_TessellationFactor;
+        gl_TessLevelOuter[2]=m_TessellationFactor;
+        gl_TessLevelOuter[3]=m_TessellationFactor;
 
-        gl_TessLevelInner[0]=5;
-        gl_TessLevelInner[1]=5;
+        gl_TessLevelInner[0]=m_TessellationFactor;
+        gl_TessLevelInner[1]=m_TessellationFactor;
     }
     gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position;
 }