Add Value/Multiplier to Parameter menu: have an "exponent"-ed version #824

Author: johnnyquest

PARMmenu.xml

@@ -139,11 +139,22 @@ except:
 					<expression>len(kwargs['parms'])>0 and type(kwargs['parms'][0].parmTemplate()) is hou.FloatParmTemplate</expression>
 				</context>
 				<scriptCode><![CDATA[
-import qlibutils;
+import qlibutils; reload(qlibutils);
 qlibutils.add_parm_value_multiplier(kwargs)
 ]]></scriptCode>
 			</scriptItem>
 
+			<scriptItem id="ql_add_parm_value_multiplier_exp">
+				<label>Add Value/Multiplier + Exponent</label>
+				<context>
+					<expression>len(kwargs['parms'])>0 and type(kwargs['parms'][0].parmTemplate()) is hou.FloatParmTemplate</expression>
+				</context>
+				<scriptCode><![CDATA[
+import qlibutils; reload(qlibutils);
+qlibutils.add_parm_value_multiplier(kwargs, add_exponent=True)
+]]></scriptCode>
+			</scriptItem>
+
 			<scriptItem id="ql_set_rampbasis_label">
 				<label>Set Ramp to...</label>
 				<context>

scripts/python/qlibutils.py

@@ -279,7 +279,7 @@ def toggle_abs_rel_path(kwargs):
                 pass
 
 
-def add_parm_value_multiplier(kwargs):
+def add_parm_value_multiplier(kwargs, add_exponent=False):
     """Adds a value/multipler parameter pair to the specified parameter.
     (Called from PARMmenu.xml)
     """
@@ -295,8 +295,11 @@ def add_parm_value_multiplier(kwargs):
         pl = t.label()
         pvn = '%s_value' % pn
         pmn = '%s_mult' % pn
+        pxn = '%s_exp' % pn
         t = hou.FloatParmTemplate(name=p.name(), label="...", num_components=1)
 
+        expr = "ch('%s') * ch('%s')" % (pvn, pmn, )
+
         if not n.parm(pvn) and not n.parm(pmn):
             # value
             t.setName(pvn)
@@ -310,10 +313,22 @@ def add_parm_value_multiplier(kwargs):
             t.setMaxValue(2.0)
             t.setDefaultValue( (1.0, ) )
             g.insertAfter(pvn, t)
+
+            if add_exponent and not n.parm(pxn):
+                # exp
+                t.setName(pxn)
+                t.setLabel('%s (exp)' % pl)
+                t.setMinValue(0.001)
+                t.setMaxValue(4.0)
+                t.setDefaultValue( (2.0, ) )
+                g.insertAfter(pmn, t)
+
+                expr = "ch('%s') * pow(ch('%s'), ch('%s'))" % (pvn, pmn, pxn, )
+
             # add parms
             n.setParmTemplateGroup(g)
 
-            p.setExpression("ch('%s') * ch('%s')" % (pvn, pmn, ) )
+            p.setExpression(expr)
         else:
             hou.ui.setStatusMessage("Value/multiplier params already exist for %s" % p.path(),
                 severity=hou.severityType.Warning)