1 files changed, 20 insertions, 0 deletions
diff --git a/shaders/snow.vert b/shaders/snow.vert
new file mode 100644
index 0000000..535c26a
--- /dev/null
+++ b/shaders/snow.vert
@@ -0,0 +1,20 @@
+#version 150
+#extension GL_ARB_explicit_attrib_location : enable
+#extension GL_ARB_explicit_uniform_location : enable
+
+layout(location = 0) in vec3 in_position ;
+layout(location = 2) in vec3 in_range ;
+
+uniform mat4 pjMatrix ;
+uniform mat4 mvMatrix ;
+
+uniform float time ;
+
+void main() {
+    float tmp = in_position.y + time ;
+    float ipart ;
+    float fpart = modf( tmp, ipart ) ;
+    float newy = in_range.y - (int(ipart) % int(in_range.y) + fpart) + in_range.x ; 
+    vec3 newp = vec3( in_position.x, newy, in_position.z ) ;
+    gl_Position = pjMatrix * (mvMatrix * vec4(newp,1.0)) ;
+}