From a70715ab8c31160f1be2a74d208681c2ad422bbb Mon Sep 17 00:00:00 2001
From: clifford <clifford@b57f626f-c46c-0410-a088-ec61d464b74c>
Date: Tue, 30 Jun 2009 08:38:31 +0000
Subject: Clifford Wolf: 	Added assign() and if() 	Added first
 for() outline

git-svn-id: http://svn.clifford.at/openscad/trunk@38 b57f626f-c46c-0410-a088-ec61d464b74c

diff --git a/context.cc b/context.cc
index 3a257c6..a7b537d 100644
--- a/context.cc
+++ b/context.cc
@@ -23,6 +23,8 @@
 Context::Context(const Context *parent)
 {
 	this->parent = parent;
+	functions_p = NULL;
+	modules_p = NULL;
 	ctx_stack.append(this);
 }
 
@@ -77,7 +79,7 @@ Value Context::lookup_variable(QString name) const
 
 Value Context::evaluate_function(QString name, const QVector<QString> &argnames, const QVector<Value> &argvalues) const
 {
-	if (functions_p->contains(name))
+	if (functions_p && functions_p->contains(name))
 		return functions_p->value(name)->evaluate(this, argnames, argvalues);
 	if (parent)
 		return parent->evaluate_function(name, argnames, argvalues);
@@ -89,7 +91,7 @@ AbstractNode *Context::evaluate_module(QString name, const QVector<QString> &arg
 {
 	if (arg_context == NULL)
 		arg_context = this;
-	if (modules_p->contains(name))
+	if (modules_p && modules_p->contains(name))
 		return modules_p->value(name)->evaluate(this, argnames, argvalues, arg_children, arg_context);
 	if (parent)
 		return parent->evaluate_module(name, argnames, argvalues, arg_children, arg_context);
diff --git a/control.cc b/control.cc
index 82fa6bf..bfada90 100644
--- a/control.cc
+++ b/control.cc
@@ -36,13 +36,37 @@ public:
 	virtual AbstractNode *evaluate(const Context *ctx, const QVector<QString> &call_argnames, const QVector<Value> &call_argvalues, const QVector<ModuleInstanciation*> arg_children, const Context *arg_context) const;
 };
 
+void for_eval(AbstractNode *node, int l, const QVector<QString> &call_argnames, const QVector<Value> &call_argvalues, const QVector<ModuleInstanciation*> arg_children, const Context *arg_context)
+{
+	if (call_argnames.size() > l) {
+		QString it_name = call_argnames[l];
+		Value it_values = call_argvalues[l];
+		Context c(arg_context);
+		if (it_values.type == Value::RANGE) {
+			for (double i = it_values.r_begin; i <= it_values.r_end; i += it_values.r_step) {
+				fprintf(stderr, "%f\n", i);
+				c.set_variable(it_name, Value(i));
+				for_eval(node, l+1, call_argnames, call_argvalues, arg_children, &c);
+			}
+		}
+		else {
+			for_eval(node, l+1, call_argnames, call_argvalues, arg_children, &c);
+		}
+	} else {
+		foreach (ModuleInstanciation *v, arg_children) {
+			AbstractNode *n = v->evaluate(arg_context);
+			if (n != NULL)
+				node->children.append(n);
+		}
+	}
+}
+
 AbstractNode *ControlModule::evaluate(const Context*, const QVector<QString> &call_argnames, const QVector<Value> &call_argvalues, const QVector<ModuleInstanciation*> arg_children, const Context *arg_context) const
 {
 	AbstractNode *node = new AbstractNode();
 
 	if (type == ASSIGN)
 	{
-		/* FIXME */
 		Context c(arg_context);
 		for (int i = 0; i < call_argnames.size(); i++) {
 			if (!call_argnames[i].isEmpty())
@@ -57,10 +81,17 @@ AbstractNode *ControlModule::evaluate(const Context*, const QVector<QString> &ca
 
 	if (type == FOR)
 	{
+		for_eval(node, 0, call_argnames, call_argvalues, arg_children, arg_context);
 	}
 
 	if (type == IF)
 	{
+		if (call_argvalues.size() > 0 && call_argvalues[0].type == Value::BOOL && call_argvalues[0].b)
+			foreach (ModuleInstanciation *v, arg_children) {
+				AbstractNode *n = v->evaluate(arg_context);
+				if (n != NULL)
+					node->children.append(n);
+			}
 	}
 
 	return node;
@@ -68,8 +99,8 @@ AbstractNode *ControlModule::evaluate(const Context*, const QVector<QString> &ca
 
 void register_builtin_control()
 {
-	// builtin_modules["assign"] = new ControlModule(ASSIGN);
+	builtin_modules["assign"] = new ControlModule(ASSIGN);
 	// builtin_modules["for"] = new ControlModule(FOR);
-	// builtin_modules["if"] = new ControlModule(IF);
+	builtin_modules["if"] = new ControlModule(IF);
 }
 
diff --git a/openscad.pro b/openscad.pro
index 0b0f6f1..1ec32fa 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -15,7 +15,7 @@ HEADERS += openscad.h
 SOURCES += openscad.cc mainwin.cc glview.cc
 SOURCES += value.cc expr.cc func.cc module.cc context.cc
 SOURCES += csgterm.cc polyset.cc csgops.cc transform.cc
-SOURCES += primitives.cc
+SOURCES += primitives.cc control.cc
 
 QT += opengl
 
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