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--- tutorials:xl-turtle-geometry [2024/11/29 12:25] – [Transformation] tim
+++ tutorials:xl-turtle-geometry [2024/12/18 10:02] (current) – [3D objects] Tim
@@ Line 54: / Line 54: @@
 The **moving** part is already covered by the M node for now.
-You can **rotate** the turtle along the three axes x, y and z. We can see an example of the rotation tool on the right with the possible rotations in colors: x=red, y=blue and z=green. In the turtle geometry we can rotate these axes with the commands ''RL(angle)'', ''RU(angle)'' and ''RH(angle)''. RL rotates around the local X-axis (the red circle in the picture), RU around the Y-axis (the blue circle) and RH around the Z-axis. If we imagine to look from the perspective of the turtle, the names make more sense: RL rotates to the __l__left (with negative values to the right), RU rotates __u__p and RH rotates around the __h__head axes.
+You can **rotate** the turtle along the three axes x, y and z. We can see an example of the rotation tool on the right with the possible rotations in colors: x=red, y=blue and z=green. In the turtle geometry we can rotate these axes with the commands ''RL(angle)'', ''RU(angle)'' and ''RH(angle)''. RL rotates around the local X-axis (the red circle in the picture), RU around the Y-axis (the blue circle) and RH around the Z-axis. If we imagine to look from the perspective of the turtle, the names make more sense: RL rotates to the __l__eft (with negative values to the right), RU rotates __u__p and RH rotates around the __h__ead axes.
 Following up on our little example above you could think about rotation the short cylinder 30 degrees up like:
@@ Line 96: / Line 96: @@
 |{{:tutorials:turtle_tut_ftranslatef.png?direct&240 |}}{{ :tutorials:turtle_tut_ftranslatef_graph.png?direct&240|}}|
-Similarly the **Rotation** command is rotating around all 3 local axes at the same time:
+Similarly the **Rotation** command is rotating around all 3 local axes at the same time. They do not influence each other that way so a rotation on the head axes would once again be not that impressive in our case.
 <code java>
 protected void init ()
@@ Line 104: / Line 105: @@
 </code>
 |{{:tutorials:turtle_tut_frotatef.png?direct&240 |}}{{ :tutorials:turtle_tut_frotatef_graph.png?direct&240|}}|
-===== Local transformation =====
-===== Modules =====
+Finally the **scale** command can be used to change the size of all following commands, either proportionally or depending on the axes. For example if you want your howl model to be halve the size without chaining any parameter you could just add a Scale(0.5) in the beginning:
+<code java>
+protected void init ()
+[
+	Axiom ==> Scale(0.5) F Rotate(20,30,0)F(0.2,2);
+]
+</code>
+This will give us the same result as before only a smaller...
+Additionally, if we would like to be our cylinders to be not round but oval we can use the scale command as well, but with three parameters for the axes. For example we can turn the upper F in to a oval like this:
+<code java>
+protected void init ()
+[
+	Axiom ==> F Rotate(20,30,0)Scale(0.2,1,1)F(0.2,2);
+]
+</code>
-==== Instantiation rules ====
+|{{:tutorials:turtle_tut_frotatescalef.png?direct&240| }}{{ :tutorials:turtle_tut_frotatescalef_graph.png?direct&240|}}|
-===== Edge types =====
+===== 3D objects =====
-==== Branches ====
+As mentioned above in GroIMP we are not limited to the turtle commands but we can also use geometrical objects.
-==== Decomposition & custom ====
+<code java>
+protected void init ()
+[
+	Axiom ==> F Sphere(1);
+]
+</code>