Added particle fx example.

assets/sprites.atlas

@@ -31,6 +31,12 @@ images {
 images {
   image: "/assets/images/red_button12.png"
 }
+images {
+  image: "/assets/images/flame.png"
+}
+images {
+  image: "/assets/images/smoke.png"
+}
 animations {
   id: "bee"
   images {
@@ -147,6 +153,40 @@ animations {
   flip_horizontal: 0
   flip_vertical: 0
 }
+animations {
+  id: "stinger"
+  images {
+    image: "/assets/images/Sting01.png"
+  }
+  images {
+    image: "/assets/images/Sting02.png"
+  }
+  images {
+    image: "/assets/images/Sting03.png"
+  }
+  images {
+    image: "/assets/images/Sting04.png"
+  }
+  images {
+    image: "/assets/images/Sting05.png"
+  }
+  images {
+    image: "/assets/images/Sting06.png"
+  }
+  images {
+    image: "/assets/images/Sting07.png"
+  }
+  images {
+    image: "/assets/images/Sting08.png"
+  }
+  images {
+    image: "/assets/images/Sting09.png"
+  }
+  playback: PLAYBACK_LOOP_FORWARD
+  fps: 30
+  flip_horizontal: 0
+  flip_vertical: 0
+}
 margin: 0
 extrude_borders: 2
 inner_padding: 0

examples/_main/loader.go

@@ -388,3 +388,21 @@ embedded_components {
     w: 1.0
   }
 }
+embedded_components {
+  id: "particles/particlefx"
+  type: "collectionproxy"
+  data: "collection: \"/examples/particles/particlefx/particlefx.collection\"\n"
+  "exclude: false\n"
+  ""
+  position {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+  }
+  rotation {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+    w: 1.0
+  }
+}

examples/_main/menu.gui_script

@@ -99,13 +99,13 @@ local function show_category(self, category)
 end
 
 function init(self)
-	self.index = { "basics", "physics", "animation", "gui", "input", "audio", "render", "camera", "debug" }
+	self.index = { "basics", "physics", "animation", "gui", "input", "particles", "render", "camera", "debug" }
 	self.index["basics"] = { "simple_move", "message_passing", "follow", "parent_child", "spawn" }
 	self.index["physics"] = { "dynamic", "kinematic", "trigger" }
 	self.index["animation"] = { "spinner", "flipbook", "tween", "spine" }
 	self.index["gui"] = { "button", "stencil", "load_texture"}
 	self.index["input"] = { "move", "text", "down duration" }
-	self.index["audio"] = { "lorem ipsum" }
+	self.index["particles"] = { "particlefx" }
 	self.index["render"] = { "lorem ipsum" }
 	self.index["camera"] = { "lorem ipsum" }
 	self.index["debug"] = { "physics", "profile" }

examples/particles/particlefx/particlefx.collection

@@ -0,0 +1,52 @@
+name: "default"
+scale_along_z: 0
+embedded_instances {
+  id: "gameobject"
+  data: "components {\n"
+  "  id: \"script\"\n"
+  "  component: \"/examples/particles/particlefx/particlefx.script\"\n"
+  "  position {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "  }\n"
+  "  rotation {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "    w: 1.0\n"
+  "  }\n"
+  "}\n"
+  "components {\n"
+  "  id: \"particles\"\n"
+  "  component: \"/examples/particles/particlefx/particlefx.particlefx\"\n"
+  "  position {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "  }\n"
+  "  rotation {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "    w: 1.0\n"
+  "  }\n"
+  "}\n"
+  ""
+  position {
+    x: 335.192
+    y: 316.802
+    z: 0.0
+  }
+  rotation {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+    w: 1.0
+  }
+  scale3 {
+    x: 1.0
+    y: 1.0
+    z: 1.0
+  }
+}

examples/particles/particlefx/particlefx.md

@@ -0,0 +1,7 @@
+---
+title: Particle effect
+brief: This example shows a simple particle effect.
+scripts: particlefx.script
+---
+
+![particlefx](particlefx.jpg)

examples/particles/particlefx/particlefx.particlefx

@@ -0,0 +1,221 @@
+emitters {
+  id: "emitter"
+  mode: PLAY_MODE_LOOP
+  duration: 1.0
+  space: EMISSION_SPACE_WORLD
+  position {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+  }
+  rotation {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+    w: 1.0
+  }
+  tile_source: "/assets/sprites.atlas"
+  animation: "flame"
+  material: "/builtins/materials/particlefx.material"
+  blend_mode: BLEND_MODE_ALPHA
+  particle_orientation: PARTICLE_ORIENTATION_DEFAULT
+  inherit_velocity: 0.0
+  max_particle_count: 128
+  type: EMITTER_TYPE_2DCONE
+  start_delay: 0.0
+  properties {
+    key: EMITTER_KEY_SPAWN_RATE
+    points {
+      x: 0.0
+      y: 50.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_SIZE_X
+    points {
+      x: 0.0
+      y: 8.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_SIZE_Y
+    points {
+      x: 0.0
+      y: 12.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_SIZE_Z
+    points {
+      x: 0.0
+      y: 0.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_LIFE_TIME
+    points {
+      x: 0.0
+      y: 2.5
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_SPEED
+    points {
+      x: 0.0
+      y: 100.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_SIZE
+    points {
+      x: 0.0
+      y: 20.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_RED
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_GREEN
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_BLUE
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_ALPHA
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  properties {
+    key: EMITTER_KEY_PARTICLE_ROTATION
+    points {
+      x: 0.0
+      y: 0.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+    spread: 0.0
+  }
+  particle_properties {
+    key: PARTICLE_KEY_SCALE
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+  }
+  particle_properties {
+    key: PARTICLE_KEY_RED
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+  }
+  particle_properties {
+    key: PARTICLE_KEY_GREEN
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+  }
+  particle_properties {
+    key: PARTICLE_KEY_BLUE
+    points {
+      x: 0.0
+      y: 1.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+  }
+  particle_properties {
+    key: PARTICLE_KEY_ALPHA
+    points {
+      x: 0.0
+      y: 0.0
+      t_x: 0.07194582
+      t_y: 0.99740857
+    }
+    points {
+      x: 0.11320755
+      y: 0.99277455
+      t_x: 0.99418455
+      t_y: 0.10768964
+    }
+    points {
+      x: 0.7112546
+      y: 0.555656
+      t_x: 0.5694311
+      t_y: -0.82203907
+    }
+    points {
+      x: 1.0
+      y: 0.0072254334
+      t_x: 0.4737472
+      t_y: -0.8806609
+    }
+  }
+  particle_properties {
+    key: PARTICLE_KEY_ROTATION
+    points {
+      x: 0.0
+      y: 0.0
+      t_x: 1.0
+      t_y: 0.0
+    }
+  }
+  size_mode: SIZE_MODE_MANUAL
+  start_delay_spread: 0.0
+  duration_spread: 0.0
+}

examples/particles/particlefx/particlefx.script

@@ -0,0 +1,7 @@
+function init(self)
+	particlefx.play("#particles") -- <1>
+end
+
+--[[
+1. Start playing the particle effect in component "particles" in this game object.
+--]]