* @param statement1 the statement being read
* @return the mapping
* @throws IOException
*/
public VariableMapping readInputMapping(Statement statement1) throws IOException {
VariableMapping mapping = null;
try {
mapping = parseMapping(statement1, new boolean[]{false, true});
} catch (Exception e) {
throw new MatParseException("Unexpected mapping format", statement1, e);
}
ShaderNodeVariable left = mapping.getLeftVariable();
ShaderNodeVariable right = mapping.getRightVariable();
if (!updateVariableFromList(left, shaderNode.getDefinition().getInputs())) {
throw new MatParseException(left.getName() + " is not an input variable of " + shaderNode.getDefinition().getName(), statement1);
}
if (left.getType().startsWith("sampler") && !right.getNameSpace().equals("MatParam")) {
throw new MatParseException("Samplers can only be assigned to MatParams", statement1);
}
if (right.getNameSpace().equals("Global")) {
right.setType("vec4");//Globals are all vec4 for now (maybe forever...)
// updateCondition(right, mapping);
storeGlobal(right, statement1);
} else if (right.getNameSpace().equals("Attr")) {
if (shaderNode.getDefinition().getType() == Shader.ShaderType.Fragment) {
throw new MatParseException("Cannot have an attribute as input in a fragment shader" + right.getName(), statement1);
}
updateVarFromAttributes(mapping.getRightVariable(), mapping);
// updateCondition(mapping.getRightVariable(), mapping);
storeAttribute(mapping.getRightVariable());
} else if (right.getNameSpace().equals("MatParam")) {
MatParam param = findMatParam(right.getName());
if (param == null) {
throw new MatParseException("Could not find a Material Parameter named " + right.getName(), statement1);
}
if (shaderNode.getDefinition().getType() == Shader.ShaderType.Vertex) {
if (updateRightFromUniforms(param, mapping, vertexDeclaredUniforms, statement1)) {
storeVertexUniform(mapping.getRightVariable());
}
} else {
if (updateRightFromUniforms(param, mapping, fragmentDeclaredUniforms, statement1)) {
if (mapping.getRightVariable().getType().contains("|")) {
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());
}
}
} else if (right.getNameSpace().equals("WorldParam")) {
UniformBinding worldParam = findWorldParam(right.getName());
if (worldParam == null) {
throw new MatParseException("Could not find a World Parameter named " + right.getName(), statement1);
}
if (shaderNode.getDefinition().getType() == Shader.ShaderType.Vertex) {
if (updateRightFromUniforms(worldParam, mapping, vertexDeclaredUniforms)) {
storeVertexUniform(mapping.getRightVariable());
}
} else {
if (updateRightFromUniforms(worldParam, mapping, fragmentDeclaredUniforms)) {
storeFragmentUniform(mapping.getRightVariable());
}
}
} else {
ShaderNode node = nodes.get(right.getNameSpace());
if (node == null) {
throw new MatParseException("Undeclared node" + right.getNameSpace() + ". Make sure this node is declared before the current node", statement1);
}
ShaderNodeVariable var = findNodeOutput(node.getDefinition().getOutputs(), right.getName());
if (var == null) {
throw new MatParseException("Cannot find output variable" + right.getName() + " form ShaderNode " + node.getName(), statement1);
}
right.setNameSpace(node.getName());
right.setType(var.getType());
mapping.setRightVariable(right);
storeVaryings(node, mapping.getRightVariable());
}
checkTypes(mapping, statement1);