port from perforce

hgplus/nordlicht2014-intro/ideas.txt

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+Animated values:
+- particle speed
+- particle size
+- emitter direction
+- emitter radius
+- emision rate
+- gravity
+- trembling particles
+- approximate sdf/text
+- camera shake
+- color flash
+- camera position
+- camera lookat
+- animated 3d smoothnoise (tweakable speed):
+	- offset amplitude
+	- color amplitude
+	- size amplitude
+	- speed bonus
+
+Events:
+- spawn 1 emitter
+- clear all emitters
+- explosion (replace all emitters with many random points)
+- shock wave (add world-space impulse to nearby particles)
+- split all emitters into 2