[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [19632] trunk/blender/source/blender/ blenkernel/intern/effect.c: Particle effector falloff maxdist etc.

[Janne Karhu]

Revision: 19632
          http://projects.blender.org/plugins/scmsvn/viewcvs.php?view=rev&root=bf-blender&revision=19632
Author:   jhk
Date:     2009-04-10 01:43:25 +0200 (Fri, 10 Apr 2009)

Log Message:
-----------
Particle effector falloff maxdist etc. didn't work like it was supposed to.

Modified Paths:
--------------
    trunk/blender/source/blender/blenkernel/intern/effect.c

Modified: trunk/blender/source/blender/blenkernel/intern/effect.c
===================================================================
--- trunk/blender/source/blender/blenkernel/intern/effect.c	2009-04-09 23:10:12 UTC (rev 19631)
+++ trunk/blender/source/blender/blenkernel/intern/effect.c	2009-04-09 23:43:25 UTC (rev 19632)
@@ -298,24 +298,22 @@
 	return ret;
 }
 
-
+/* maxdist: zero effect from this distance outwards (if usemax) */
+/* mindist: full effect up to this distance (if usemin) */
+/* power: falloff with formula 1/r^power */
 static float falloff_func(float fac, int usemin, float mindist, int usemax, float maxdist, float power)
 {
-	if(!usemin)
-		mindist= 0.0f;
+	/* first quick checks */
+	if(usemax && fac > maxdist)
+		return 0.0f;
 
-	if(fac < mindist) {
+	if(usemin && fac < mindist)
 		return 1.0f;
-	}
-	else if(usemax) {
-		if(fac>maxdist || (maxdist-mindist)<=0.0f)
-			return 0.0f;
 
-		fac= (fac-mindist)/(maxdist-mindist);
-		return 1.0f - (float)pow((double)fac, (double)power);
-	}
-	else
-		return pow((double)1.0f+fac-mindist, (double)-power);
+	if(!usemin)
+		mindist = 0.0;
+
+	return pow((double)1.0+fac-mindist, (double)-power);
 }
 
 static float falloff_func_dist(PartDeflect *pd, float fac)