1 files changed, 26 insertions, 0 deletions
diff --git a/src/particles/shaders/customparticletemplate.vert b/src/particles/shaders/customparticletemplate.vert
new file mode 100644
index 0000000000..c482c4207b
--- /dev/null
+++ b/src/particles/shaders/customparticletemplate.vert
@@ -0,0 +1,26 @@
+attribute highp vec2 qt_ParticlePos;
+attribute highp vec2 qt_ParticleTex;
+attribute highp vec4 qt_ParticleData; // x = time, y = lifeSpan, z = size, w = endSize
+attribute highp vec4 qt_ParticleVec;  // x,y = constant velocity, z,w = acceleration
+attribute highp float qt_ParticleR;
+
+uniform highp mat4 qt_Matrix;
+uniform highp float qt_Timestamp;
+
+varying highp vec2 qt_TexCoord0;
+
+void defaultMain()
+{
+    qt_TexCoord0 = qt_ParticleTex;
+    highp float size = qt_ParticleData.z;
+    highp float endSize = qt_ParticleData.w;
+    highp float t = (qt_Timestamp - qt_ParticleData.x) / qt_ParticleData.y;
+    highp float currentSize = mix(size, endSize, t * t);
+    if (t < 0. || t > 1.)
+        currentSize = 0.;
+    highp vec2 pos = qt_ParticlePos
+                   - currentSize / 2. + currentSize * qt_ParticleTex   // adjust size
+                   + qt_ParticleVec.xy * t * qt_ParticleData.y         // apply velocity vector..
+                   + 0.5 * qt_ParticleVec.zw * pow(t * qt_ParticleData.y, 2.);
+    gl_Position = qt_Matrix * vec4(pos.x, pos.y, 0, 1);
+}