Quick Explode operator:

* Sets up a particle system and an explode modifier.
* In "blend" mode requires two selected objects and creates "crossed keyed" particle systems between the objects for a simple blend effect where the first object explodes and then recombines as the second object.
* Also renamed the other quick effect operators as "Quick ..." to bring some consistency to the operators (also nice that now you can just write "quick" to the operator search and get all these operators).

release/scripts/startup/bl_operators/object_quick_effects.py

@@ -22,10 +22,9 @@ from mathutils import Vector
 import bpy
 from bpy.props import BoolProperty, EnumProperty, IntProperty, FloatProperty, FloatVectorProperty
 
-
+class QuickFur(bpy.types.Operator):
-class MakeFur(bpy.types.Operator):
+    bl_idname = "object.quick_fur"
-    bl_idname = "object.make_fur"
+    bl_label = "Quick Fur"
-    bl_label = "Make Fur"
     bl_options = {'REGISTER', 'UNDO'}
 
     density = EnumProperty(items=(
@@ -79,6 +78,155 @@ class MakeFur(bpy.types.Operator):
 
         return {'FINISHED'}
 
+class QuickExplode(bpy.types.Operator):
+    bl_idname = "object.quick_explode"
+    bl_label = "Quick Explode"
+    bl_options = {'REGISTER', 'UNDO'}
+
+    style = EnumProperty(items=(
+                        ('EXPLODE', "Explode", ""),
+                        ('BLEND', "Blend", "")),
+                name="Explode Style",
+                description="",
+                default='EXPLODE')
+
+    amount = IntProperty(name="Amount of pieces",
+            default=100, min=2, max=10000, soft_min=2, soft_max=10000)
+
+    duration = IntProperty(name="Duration",
+            default=50, min=1, max=10000, soft_min=1, soft_max=10000)
+
+    start_frame = IntProperty(name="Start Frame",
+            default=1, min=1, max=10000, soft_min=1, soft_max=10000)
+
+    end_frame = IntProperty(name="End Frame",
+            default=10, min=1, max=10000, soft_min=1, soft_max=10000)
+
+    velocity = FloatProperty(name="Outwards Velocity",
+            default=1, min=0, max=1000, soft_min=0, soft_max=10)
+
+    fade = BoolProperty(name="Fade",
+                description="Fade the pieces over time.",
+                default=True)
+
+    invert_order = BoolProperty(name="Invert Order",
+                description="Blend objects in the opposite direction (only for Blend style explosion).",
+                default=False)
+
+    def execute(self, context):
+        fake_context = bpy.context.copy()
+        mesh_objects = [obj for obj in context.selected_objects if obj.type == 'MESH']
+
+        if self.style == 'BLEND' and len(mesh_objects) != 2:
+            self.report({'ERROR'}, "Select two mesh objects.")
+            return {'CANCELLED'}
+        elif not mesh_objects:
+            self.report({'ERROR'}, "Select at least one mesh object.")
+            return {'CANCELLED'}
+
+        for obj in mesh_objects:
+            if len(obj.particle_systems) > 0:
+                self.report({'ERROR'}, "Selected object's can't have particle systems.")
+                return {'CANCELLED'}
+
+        if self.fade:
+            tex = bpy.data.textures.new("Explode fade", 'BLEND')
+            tex.use_color_ramp = True
+
+            if self.style == 'BLEND':
+                tex.color_ramp.elements[0].position = 0.333
+                tex.color_ramp.elements[1].position = 0.666
+
+            tex.color_ramp.elements[0].color[3] = 1
+            tex.color_ramp.elements[1].color[3] = 0
+
+        if self.style == 'BLEND':
+            if self.invert_order:
+                from_obj = mesh_objects[1]
+                to_obj = mesh_objects[0]
+            else:
+                from_obj = mesh_objects[0]
+                to_obj = mesh_objects[1]
+
+        for obj in mesh_objects:
+            fake_context["object"] = obj
+            bpy.ops.object.particle_system_add(fake_context)
+
+            settings = obj.particle_systems[-1].settings
+            settings.count = self.amount
+            settings.frame_start = self.start_frame
+            settings.frame_end = self.end_frame - self.duration
+            settings.lifetime = self.duration
+            settings.normal_factor = self.velocity
+            settings.render_type = 'NONE'
+
+            bpy.ops.object.modifier_add(fake_context, type='EXPLODE')
+            explode = obj.modifiers[-1]
+            explode.use_edge_cut = True
+
+            if self.fade:
+                explode.show_dead = False
+                bpy.ops.mesh.uv_texture_add(fake_context);
+                uv = obj.data.uv_textures[-1]
+                uv.name = "Explode fade"
+                explode.particle_uv = uv.name
+
+                if len(obj.material_slots) == 0:
+                    obj.data.materials.append(bpy.data.materials.new("Explode fade"))
+
+                mat = obj.data.materials[0]
+                mat.use_transparency = True
+                mat.use_transparent_shadows = True
+                mat.alpha = 0
+                mat.specular_alpha = 0
+
+                tex_slot = mat.texture_slots.add()
+
+                tex_slot.texture = tex
+                tex_slot.texture_coords = 'UV'
+                tex_slot.uv_layer = uv.name
+
+                tex_slot.use_map_alpha = True
+
+                if self.style == 'BLEND':
+                    if obj == to_obj:
+                        tex_slot.alpha_factor = -1
+                        elem = tex.color_ramp.elements[1]
+                        elem.color[0] = mat.diffuse_color[0]
+                        elem.color[1] = mat.diffuse_color[1]
+                        elem.color[2] = mat.diffuse_color[2]
+                    else:
+                        elem = tex.color_ramp.elements[0]
+                        elem.color[0] = mat.diffuse_color[0]
+                        elem.color[1] = mat.diffuse_color[1]
+                        elem.color[2] = mat.diffuse_color[2]
+                else:
+                    tex_slot.use_map_color_diffuse = False
+
+            if self.style == 'BLEND':
+                settings.physics_type = 'KEYED'
+                settings.use_emit_random = False
+                settings.rotation_mode = 'NOR'
+
+                psys = obj.particle_systems[-1]
+
+                fake_context["particle_system"] = obj.particle_systems[-1]
+                bpy.ops.particle.new_target(fake_context)
+                bpy.ops.particle.new_target(fake_context)
+
+                if obj == from_obj:
+                    psys.targets[1].object = to_obj
+                else:
+                    psys.targets[0].object = from_obj
+                    settings.normal_factor = -self.velocity
+                    explode.show_unborn = False
+                    explode.show_dead = True
+            else:
+                settings.factor_random = self.velocity
+                settings.angular_velocity_factor = self.velocity/10
+
+        return {'FINISHED'}
+
 
 def obj_bb_minmax(obj, min_co, max_co):
     for i in range(0, 8):
@@ -92,9 +240,9 @@ def obj_bb_minmax(obj, min_co, max_co):
         max_co[2] = max(bb_vec[2], max_co[2])
 
 
-class MakeSmoke(bpy.types.Operator):
+class QuickSmoke(bpy.types.Operator):
-    bl_idname = "object.make_smoke"
+    bl_idname = "object.quick_smoke"
-    bl_label = "Make Smoke"
+    bl_label = "Quick Smoke"
     bl_options = {'REGISTER', 'UNDO'}
 
     style = EnumProperty(items=(
@@ -201,9 +349,9 @@ class MakeSmoke(bpy.types.Operator):
         return {'FINISHED'}
 
 
-class MakeFluid(bpy.types.Operator):
+class QuickFluid(bpy.types.Operator):
-    bl_idname = "object.make_fluid"
+    bl_idname = "object.quick_fluid"
-    bl_label = "Make Fluid"
+    bl_label = "Quick Fluid"
     bl_options = {'REGISTER', 'UNDO'}
 
     style = EnumProperty(items=(
@@ -293,4 +441,4 @@ class MakeFluid(bpy.types.Operator):
         if self.start_baking:
             bpy.ops.fluid.bake()
 
-        return {'FINISHED'}
+        return {'FINISHED'}