/**
* find the definiton from this statement (loads it if necessary)
*
* @param statement the statement being read
* @return the definition
* @throws IOException
*/
public ShaderNodeDefinition findDefinition(Statement statement) throws IOException {
String defLine[] = statement.getLine().split(":");
String defName = defLine[1].trim();
ShaderNodeDefinition def = getNodeDefinitions().get(defName);
if (def == null) {
if (defLine.length == 3) {
List<ShaderNodeDefinition> defs = null;
try {
defs = assetManager.loadAsset(new ShaderNodeDefinitionKey(defLine[2].trim()));
} catch (AssetNotFoundException e) {
throw new MatParseException("Couldn't find " + defLine[2].trim(), statement, e);
}
for (ShaderNodeDefinition definition : defs) {
definition.setPath(defLine[2].trim());
if (defName.equals(definition.getName())) {
def = definition;
}
if (!(getNodeDefinitions().containsKey(definition.getName()))) {
getNodeDefinitions().put(definition.getName(), definition);
}
}
}
if (def == null) {
throw new MatParseException(
defName + " is not a declared as Shader Node Definition", statement);
}
}
return def;
}
/**
* reads a list of ShaderNode{} blocks
*
* @param statements the list of statements to parse
* @throws IOException
*/
protected void readShaderNode(List<Statement> statements) throws IOException {
for (Statement statement : statements) {
String line = statement.getLine();
String[] split = statement.getLine().split("[ \\{]");
if (line.startsWith("Definition")) {
ShaderNodeDefinition def = findDefinition(statement);
shaderNode.setDefinition(def);
if (def.isNoOutput()) {
techniqueDef.getShaderGenerationInfo().getUnusedNodes().remove(shaderNode.getName());
}
} else if (line.startsWith("Condition")) {
String condition = line.substring(line.lastIndexOf(":") + 1).trim();
extractCondition(condition, statement);
shaderNode.setCondition(conditionParser.getFormattedExpression());
} else if (line.startsWith("InputMapping")) {
for (Statement statement1 : statement.getContents()) {
VariableMapping mapping = readInputMapping(statement1);
techniqueDef
.getShaderGenerationInfo()
.getUnusedNodes()
.remove(mapping.getRightVariable().getNameSpace());
shaderNode.getInputMapping().add(mapping);
}
} else if (line.startsWith("OutputMapping")) {
for (Statement statement1 : statement.getContents()) {
VariableMapping mapping = readOutputMapping(statement1);
techniqueDef.getShaderGenerationInfo().getUnusedNodes().remove(shaderNode.getName());
shaderNode.getOutputMapping().add(mapping);
}
} else {
throw new MatParseException("ShaderNodeDefinition", split[0], statement);
}
}
}
/**
* effectiveliy reads the ShaderNodesDefinitions block
*
* @param statements the list of statements to parse
* @param key the ShaderNodeDefinitionKey
* @throws IOException
*/
protected void readShaderNodeDefinition(List<Statement> statements, ShaderNodeDefinitionKey key)
throws IOException {
boolean isLoadDoc =
key instanceof ShaderNodeDefinitionKey
&& ((ShaderNodeDefinitionKey) key).isLoadDocumentation();
for (Statement statement : statements) {
String[] split = statement.getLine().split("[ \\{]");
String line = statement.getLine();
if (line.startsWith("Type")) {
String type = line.substring(line.lastIndexOf(':') + 1).trim();
shaderNodeDefinition.setType(Shader.ShaderType.valueOf(type));
} else if (line.startsWith("Shader ")) {
readShaderStatement(statement);
shaderNodeDefinition.getShadersLanguage().add(shaderLanguage);
shaderNodeDefinition.getShadersPath().add(shaderName);
} else if (line.startsWith("Documentation")) {
if (isLoadDoc) {
String doc = "";
for (Statement statement1 : statement.getContents()) {
doc += "\n" + statement1.getLine();
}
shaderNodeDefinition.setDocumentation(doc);
}
} else if (line.startsWith("Input")) {
varNames = "";
for (Statement statement1 : statement.getContents()) {
shaderNodeDefinition.getInputs().add(readVariable(statement1));
}
} else if (line.startsWith("Output")) {
varNames = "";
for (Statement statement1 : statement.getContents()) {
if (statement1.getLine().trim().equals("None")) {
shaderNodeDefinition.setNoOutput(true);
} else {
shaderNodeDefinition.getOutputs().add(readVariable(statement1));
}
}
} else {
throw new MatParseException(
"one of Type, Shader, Documentation, Input, Output", split[0], statement);
}
}
}
/**
* Read the ShaderNodesDefinitions block and returns a list of ShaderNodesDefinition This method
* is used by the j3sn loader
*
* <p>note that the order of the definitions in the list is not guaranteed.
*
* @param statements the list statements to parse
* @param key the ShaderNodeDefinitionKey
* @return a list of ShaderNodesDefinition
* @throws IOException
*/
public List<ShaderNodeDefinition> readNodesDefinitions(
List<Statement> statements, ShaderNodeDefinitionKey key) throws IOException {
for (Statement statement : statements) {
String[] split = statement.getLine().split("[ \\{]");
if (statement.getLine().startsWith("ShaderNodeDefinition")) {
String name = statement.getLine().substring("ShaderNodeDefinition".length()).trim();
if (!getNodeDefinitions().containsKey(name)) {
shaderNodeDefinition = new ShaderNodeDefinition();
getNodeDefinitions().put(name, shaderNodeDefinition);
shaderNodeDefinition.setName(name);
readShaderNodeDefinition(statement.getContents(), key);
}
} else {
throw new MatParseException("ShaderNodeDefinition", split[0], statement);
}
}
return new ArrayList<ShaderNodeDefinition>(getNodeDefinitions().values());
}