From 3992ed89af398fa525bc16a3781f11f96f226ef0 Mon Sep 17 00:00:00 2001
From: shadowislord <shadowislord@gmail.com>
Date: Wed, 5 Nov 2014 23:50:09 -0500
Subject: [PATCH] Fix point sprite on Android. Fixes issue #82.

---
 .../src/main/resources/Common/MatDefs/Misc/Particle.frag | 6 ++++++
 .../src/main/resources/Common/MatDefs/Misc/Particle.j3md | 9 ++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.frag b/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.frag
index 6dff8ac68..0b4875e2d 100644
--- a/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.frag
+++ b/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.frag
@@ -1,3 +1,9 @@
+#ifdef POINT_SPRITE
+#  if !defined(GL_ES) && __VERSION__ < 120
+#    error Point sprite is not supported by the video hardware!
+#  endif
+#endif
+
 #ifdef USE_TEXTURE
 uniform sampler2D m_Texture;
 varying vec4 texCoord;
diff --git a/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.j3md b/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.j3md
index c6116fa83..a327f43b9 100644
--- a/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.j3md
+++ b/jme3-core/src/main/resources/Common/MatDefs/Misc/Particle.j3md
@@ -32,7 +32,6 @@ MaterialDef Point Sprite {
             Blend AlphaAdditive
             DepthWrite Off
             PointSprite On
-            // AlphaTestFalloff 0.01
         }
 
         Defines {
@@ -43,6 +42,12 @@ MaterialDef Point Sprite {
 
     Technique {
 
+        // This technique is used in two cases:
+        // - When the driver doesn't support GLSL 1.2
+        // - When running on OpenGL ES 2.0
+        // Point sprite should be used if running on ES2, but crash
+        // if on desktop (because its not supported by HW)
+
         VertexShader   GLSL100 : Common/MatDefs/Misc/Particle.vert
         FragmentShader GLSL100 : Common/MatDefs/Misc/Particle.frag
 
@@ -56,10 +61,12 @@ MaterialDef Point Sprite {
         RenderState {
             Blend AlphaAdditive
             DepthWrite Off
+            PointSprite On
         }
 
         Defines {
             USE_TEXTURE : Texture
+            POINT_SPRITE : PointSprite
         }
     }