Merge pull request #7178 from Nex-Pro/20807

CR for Job #20807 - Fix vertically mirrored particles.

examples/tests/particleOrientationTest.js

@@ -0,0 +1,101 @@
+//
+//  particleOrientationTest.js
+//  examples/tests
+//
+//  Created by Piper.Peppercorn.
+//  Copyright 2015 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+var emitterBone = 'Head'
+var particleEntities = [];
+
+function emitter(jointName) {
+    var jointID = MyAvatar.jointNames.indexOf(jointName);
+    var newEmitter = Entities.addEntity({
+        name: 'particleEmitter ' + jointName,
+        type: 'ParticleEffect',
+        emitterShouldTrail: true,
+        textures: 'https://dl.dropboxusercontent.com/u/96759331/ParticleTest.png',
+        position: Vec3.sum(MyAvatar.getAbsoluteJointRotationInObjectFrame(jointID), MyAvatar.position),
+        parentJointIndex: jointID,
+        position: MyAvatar.getJointPosition(jointName),
+        color: {
+            red: 255,
+            green: 255,
+            blue: 255
+        },
+        isEmitting: 1,
+        maxParticles: 1,
+        lifespan: 2.0
+        ,
+        emitRate: 1,
+        emitSpeed: 0.0,
+        speedSpread: 0.0,
+        /*
+        emitOrientation: {
+            x: -0.7035577893257141,
+            y: -0.000015259007341228426,
+            z: -0.000015259007341228426,
+            w: 1.7106381058692932
+        },
+        */
+        emitOrientation: {
+            x:0,
+            y: 0,
+            z: 0,
+            w: Math.PI
+        },
+        emitRadiusStart: 0,
+        polarStart: 0,
+        polarFinish: 0,
+        azimuthFinish: 3.1415927410125732,
+        emitAcceleration: {
+            x: 0,
+            y: 0,
+            z: 0
+        },
+        accelerationSpread: {
+            x: 0,
+            y: 0,
+            z: 0
+        },
+        particleRadius: 2.0,
+        radiusSpread: 1.0,
+        radiusStart: 2.0,
+        radiusFinish: 2.0,
+        colorSpread: {
+            red: 0,
+            green: 0,
+            blue: 0
+        },
+        colorStart: {
+            red: 255,
+            green: 255,
+            blue: 255
+        },
+        colorFinish: {
+            red: 255,
+            green: 255,
+            blue: 255
+        },
+        alpha: 1,
+        alphaSpread: 0,
+        alphaStart: 1,
+        alphaFinish: 1  
+    });
+    return newEmitter;
+}
+
+
+Script.scriptEnding.connect(function() {
+    for (var i = 0; i < particleEntities.length; i++) {
+        // Fixes a crash on shutdown:
+        Entities.editEntity(particleEntities[i], { parentID: '' });
+        Entities.deleteEntity(particleEntities[i]);
+    }
+});
+
+particleEntities.push(emitter(emitterBone));

libraries/entities-renderer/src/textured_particle.slv

@@ -44,11 +44,12 @@ out vec4 varColor;
 out vec2 varTexcoord;
 
 const int NUM_VERTICES_PER_PARTICLE = 4;
+// This ordering ensures that un-rotated particles render upright in the wiewer.
 const vec4 UNIT_QUAD[NUM_VERTICES_PER_PARTICLE] = vec4[NUM_VERTICES_PER_PARTICLE](
-    vec4(-1.0, -1.0, 0.0, 0.0),
-    vec4(1.0, -1.0, 0.0, 0.0),
     vec4(-1.0, 1.0, 0.0, 0.0),
-    vec4(1.0, 1.0, 0.0, 0.0)
+    vec4(-1.0, -1.0, 0.0, 0.0),
+    vec4(1.0, 1.0, 0.0, 0.0),
+    vec4(1.0, -1.0, 0.0, 0.0)
 );
 
 float bezierInterpolate(float y1, float y2, float y3, float u) {
@@ -115,7 +116,8 @@ void main(void) {
     float seed = inColor.y;
 
     // Pass the texcoord and the z texcoord is representing the texture icon
-    varTexcoord = vec2((UNIT_QUAD[twoTriID].xy + 1.0) * 0.5);
+    // Offset for corrected vertex ordering.
+    varTexcoord = vec2((UNIT_QUAD[twoTriID].xy -1.0) * vec2(0.5, -0.5)); 
     varColor = interpolate3Vec4(particle.color.start, particle.color.middle, particle.color.finish, age);
 
     // anchor point in eye space