extended some things from shader node system.

jme3-core/src/main/java/com/jme3/material/TechniqueDef.java

@@ -188,6 +188,7 @@ public class TechniqueDef implements Savable, Cloneable {
         defineTypes = new ArrayList<VarType>();
         paramToDefineId = new HashMap<String, Integer>();
         definesToShaderMap = new HashMap<DefineList, Shader>();
+        worldBinds = new ArrayList<>();
     }
     
     /**
@@ -513,11 +514,9 @@ public class TechniqueDef implements Savable, Cloneable {
             }
         }
 
-        if (getWorldBindings() != null) {
+        for (final UniformBinding binding : getWorldBindings()) {
-           for (UniformBinding binding : getWorldBindings()) {
             shader.addUniformBinding(binding);
         }
-        }
         
         return shader;
     }
@@ -625,10 +624,6 @@ public class TechniqueDef implements Savable, Cloneable {
      * to the list of world parameters, false otherwise.
      */
     public boolean addWorldParam(String name) {
-        if (worldBinds == null){
-            worldBinds = new ArrayList<UniformBinding>();
-        }
-
         try {
             worldBinds.add(UniformBinding.valueOf(name));
             return true;
@@ -821,10 +816,8 @@ public class TechniqueDef implements Savable, Cloneable {
             e.printStackTrace();
         }
 
-        if (worldBinds != null) {
         clone.worldBinds = new ArrayList<>(worldBinds.size());
         clone.worldBinds.addAll(worldBinds);
-        }
 
         return clone;
     }

jme3-core/src/main/java/com/jme3/shader/Glsl100ShaderGenerator.java

@@ -50,7 +50,7 @@ public class Glsl100ShaderGenerator extends ShaderGenerator {
      * the indentation characters 1à tabulation characters
      */
     private final static String INDENTCHAR = "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
-    private ShaderNodeVariable inPosTmp;
+    protected ShaderNodeVariable inPosTmp;
 
     /**
      * creates a Glsl100ShaderGenerator
@@ -110,7 +110,7 @@ public class Glsl100ShaderGenerator extends ShaderGenerator {
     protected void generateVaryings(StringBuilder source, ShaderGenerationInfo info, ShaderType type) {
         source.append("\n");
         for (ShaderNodeVariable var : info.getVaryings()) {
-            declareVarying(source, var, type == ShaderType.Vertex ? false : true);
+            declareVarying(source, var, type != ShaderType.Vertex);
         }
     }
 
@@ -237,27 +237,59 @@ public class Glsl100ShaderGenerator extends ShaderGenerator {
         comment(source, shaderNode, "Begin");
         startCondition(shaderNode.getCondition(), source);
 
-        List<String> declaredInputs = new ArrayList<String>();
+        final List<String> declaredInputs = new ArrayList<>();
+
         for (VariableMapping mapping : shaderNode.getInputMapping()) {
 
+            final ShaderNodeVariable rightVariable = mapping.getRightVariable();
+            final ShaderNodeVariable leftVariable = mapping.getLeftVariable();
+
             //Variables fed with a sampler matparam or world param are replaced by the matparam itself
             //It avoids issue with samplers that have to be uniforms.
-            if (isWorldOrMaterialParam(mapping.getRightVariable()) && mapping.getRightVariable().getType().startsWith("sampler")) {
+            if (isWorldOrMaterialParam(rightVariable) && rightVariable.getType().startsWith("sampler")) {
-                nodeSource = replace(nodeSource, mapping.getLeftVariable(), mapping.getRightVariable().getPrefix() + mapping.getRightVariable().getName());
+                nodeSource = replace(nodeSource, leftVariable, rightVariable.getPrefix() + rightVariable.getName());
             } else {
-                if (mapping.getLeftVariable().getType().startsWith("sampler")) {
+
+                if (leftVariable.getType().startsWith("sampler")) {
                     throw new IllegalArgumentException("a Sampler must be a uniform");
                 }
+
                 map(mapping, source);
-                String newName = shaderNode.getName() + "_" + mapping.getLeftVariable().getName();
+            }
+
+            String newName = shaderNode.getName() + "_" + leftVariable.getName();
             if (!declaredInputs.contains(newName)) {
-                    nodeSource = replace(nodeSource, mapping.getLeftVariable(), newName);
+                nodeSource = replace(nodeSource, leftVariable, newName);
                 declaredInputs.add(newName);
             }
         }
+
+        final ShaderNodeDefinition definition = shaderNode.getDefinition();
+
+        for (final ShaderNodeVariable var : definition.getInputs()) {
+
+            if (var.getDefaultValue() == null) {
+                continue;
+            }
+
+            final String fullName = shaderNode.getName() + "_" + var.getName();
+
+            if (declaredInputs.contains(fullName)) {
+                continue;
+            }
+
+            final ShaderNodeVariable variable = new ShaderNodeVariable(var.getType(), shaderNode.getName(),
+                    var.getName(), var.getMultiplicity());
+
+            if (!isVarying(info, variable)) {
+                declareVariable(source, variable, var.getDefaultValue(), true, null);
+            }
+
+            nodeSource = replaceVariableName(nodeSource, variable);
+            declaredInputs.add(fullName);
         }
 
-        for (ShaderNodeVariable var : shaderNode.getDefinition().getOutputs()) {
+        for (ShaderNodeVariable var : definition.getOutputs()) {
             ShaderNodeVariable v = new ShaderNodeVariable(var.getType(), shaderNode.getName(), var.getName(), var.getMultiplicity());
             if (!declaredInputs.contains(shaderNode.getName() + "_" + var.getName())) {
                 if (!isVarying(info, v)) {
@@ -603,7 +635,7 @@ public class Glsl100ShaderGenerator extends ShaderGenerator {
      * makes sure inPosition attribute is of type vec3 or vec4
      * @param var the inPosition attribute
      */
-    private void fixInPositionType(ShaderNodeVariable var) {
+    protected void fixInPositionType(ShaderNodeVariable var) {
         if(!var.getType().equals("vec3") || !var.getType().equals("vec4")){
             var.setType("vec3");
         }

jme3-core/src/main/java/com/jme3/shader/ShaderNodeVariable.java

@@ -50,8 +50,10 @@ public class ShaderNodeVariable implements Savable, Cloneable {
     private String type;
     private String nameSpace;
     private String condition;
-    private boolean shaderOutput = false;
     private String multiplicity;
+    private String defaultValue;
+
+    private boolean shaderOutput = false;
 
     /**
      * creates a ShaderNodeVariable
@@ -180,6 +182,24 @@ public class ShaderNodeVariable implements Savable, Cloneable {
         this.nameSpace = nameSpace;
     }
 
+    /**
+     * Gets the default value of this variable.
+     *
+     * @return the default value of this variable.
+     */
+    public String getDefaultValue() {
+        return defaultValue;
+    }
+
+    /**
+     * Sets the default value of this variable.
+     *
+     * @param defaultValue the default value of this variable.
+     */
+    public void setDefaultValue(final String defaultValue) {
+        this.defaultValue = defaultValue;
+    }
+
     @Override
     public int hashCode() {
         int hash = 7;
@@ -230,7 +250,7 @@ public class ShaderNodeVariable implements Savable, Cloneable {
      */
     @Override
     public void write(JmeExporter ex) throws IOException {
-        OutputCapsule oc = (OutputCapsule) ex.getCapsule(this);
+        OutputCapsule oc = ex.getCapsule(this);
         oc.write(name, "name", "");
         oc.write(type, "type", "");
         oc.write(prefix, "prefix", "");
@@ -238,7 +258,7 @@ public class ShaderNodeVariable implements Savable, Cloneable {
         oc.write(condition, "condition", null);
         oc.write(shaderOutput, "shaderOutput", false);
         oc.write(multiplicity, "multiplicity", null);
-
+        oc.write(defaultValue, "defaultValue", null);
     }
 
     /**
@@ -249,7 +269,7 @@ public class ShaderNodeVariable implements Savable, Cloneable {
      */
     @Override
     public void read(JmeImporter im) throws IOException {
-        InputCapsule ic = (InputCapsule) im.getCapsule(this);
+        InputCapsule ic = im.getCapsule(this);
         name = ic.readString("name", "");
         type = ic.readString("type", "");
         prefix = ic.readString("pefix", "");
@@ -257,6 +277,7 @@ public class ShaderNodeVariable implements Savable, Cloneable {
         condition = ic.readString("condition", null);
         shaderOutput = ic.readBoolean("shaderOutput", false);
         multiplicity = ic.readString("multiplicity", null);
+        defaultValue = ic.readString("defaultValue", null);
     }
 
     /**

jme3-core/src/plugins/java/com/jme3/material/plugins/ShaderNodeLoaderDelegate.java

@@ -217,11 +217,15 @@ public class ShaderNodeLoaderDelegate {
      * @throws IOException
      */
     protected ShaderNodeVariable readVariable(Statement statement) throws IOException {
+
         String line = statement.getLine().trim().replaceAll("\\s*\\[", "[");
         String[] splitVar = line.split("\\s");
-        if (splitVar.length != 2) {
+
-            throw new MatParseException("2 arguments", splitVar.length + "", statement);
+        if (splitVar.length > 3) {
+            throw new MatParseException("More than 3 arguments", splitVar.length + "", statement);
         }
+
+        String defaultValue = splitVar.length > 2? splitVar[2] : null;
         String varName = splitVar[1];
         String varType = splitVar[0];
         String multiplicity = null;
@@ -232,11 +236,17 @@ public class ShaderNodeLoaderDelegate {
             varName = arr[0].trim();
             multiplicity = arr[1].replaceAll("\\]", "").trim();
         }
+
         if (varNames.contains(varName + ";")) {
             throw new MatParseException("Duplicate variable name " + varName, statement);
         }
+
         varNames += varName + ";";
-        return new ShaderNodeVariable(varType, "", varName, multiplicity);
+
+        final ShaderNodeVariable variable = new ShaderNodeVariable(varType, "", varName, multiplicity);
+        variable.setDefaultValue(defaultValue);
+
+        return variable;
     }
 
     /**
@@ -661,18 +671,12 @@ public class ShaderNodeLoaderDelegate {
             }
             if (shaderNode.getDefinition().getType() == Shader.ShaderType.Vertex) {
                 if (updateRightFromUniforms(param, mapping, vertexDeclaredUniforms, statement1)) {
+                    updateMaterialTextureType(statement1, mapping, left, param);
                     storeVertexUniform(mapping.getRightVariable());
                 }
             } else {
                 if (updateRightFromUniforms(param, mapping, fragmentDeclaredUniforms, statement1)) {
-                    if (mapping.getRightVariable().getType().contains("|")) {
+                    updateMaterialTextureType(statement1, mapping, left, param);
-                        String type = fixSamplerType(left.getType(), mapping.getRightVariable().getType());
-                        if (type != null) {
-                            mapping.getRightVariable().setType(type);
-                        } else {
-                            throw new MatParseException(param.getVarType().toString() + " can only be matched to one of " + param.getVarType().getGlslType().replaceAll("\\|", ",") + " found " + left.getType(), statement1);
-                        }
-                    }                
                     storeFragmentUniform(mapping.getRightVariable());
                 }
             }
@@ -714,6 +718,32 @@ public class ShaderNodeLoaderDelegate {
         return mapping;
     }
 
+    /**
+     * Updated the material texture type of the variable mapping.
+     *
+     * @param statement the statement.
+     * @param mapping the variable mapping.
+     * @param left the left variable.
+     * @param param the material parameter.
+     * @throws MatParseException
+     */
+    private void updateMaterialTextureType(final Statement statement, final VariableMapping mapping,
+                                           final ShaderNodeVariable left, final MatParam param) throws MatParseException {
+
+        if (!mapping.getRightVariable().getType().contains("|")) {
+            return;
+        }
+
+        final String type = fixSamplerType(left.getType(), mapping.getRightVariable().getType());
+
+        if (type != null) {
+            mapping.getRightVariable().setType(type);
+        } else {
+            throw new MatParseException(param.getVarType().toString() + " can only be matched to one of " +
+                    param.getVarType().getGlslType().replaceAll("\\|", ",") + " found " + left.getType(), statement);
+        }
+    }
+
     /**
      * reads an output mapping
      *
@@ -924,12 +954,12 @@ public class ShaderNodeLoaderDelegate {
             dv.addNode(shaderNode);
             //if a variable is declared with the same name as an input and an output and is a varying, set it as a shader output so it's declared as a varying only once.
             for (VariableMapping variableMapping : node.getInputMapping()) {
-                if (variableMapping.getLeftVariable().getName().equals(variable.getName())) {
+                final ShaderNodeVariable leftVariable = variableMapping.getLeftVariable();
-                    variableMapping.getLeftVariable().setShaderOutput(true);
+                if (leftVariable.getName().equals(variable.getName())) {
+                    leftVariable.setShaderOutput(true);
                 }
             }
         }
-
     }
 
     /**

jme3-plugins/src/main/java/com/jme3/material/plugin/export/materialdef/J3mdTechniqueDefWriter.java

@@ -288,7 +288,4 @@ public class J3mdTechniqueDefWriter {
         }
         return null;
     }
-
 }
-
-