1 files changed, 34 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/particle_strand_vert.glsl b/source/blender/draw/modes/shaders/particle_strand_vert.glsl
new file mode 100644
index 00000000000..d4c35d14182
--- /dev/null
+++ b/source/blender/draw/modes/shaders/particle_strand_vert.glsl
@@ -0,0 +1,34 @@
+
+uniform mat4 ModelViewProjectionMatrix;
+uniform mat3 NormalMatrix;
+uniform mat4 ModelViewMatrix;
+
+in vec3 pos;
+in vec3 nor;
+in int ind;
+out vec3 tangent;
+out vec3 viewPosition;
+flat out float colRand;
+
+float rand(int s)
+{
+	int seed = s * 1023423;
+
+	seed = (seed ^ 61) ^ (seed >> 16);
+	seed *= 9;
+	seed = seed ^ (seed >> 4);
+	seed *= 0x27d4eb2d;
+	seed = seed ^ (seed >> 15);
+
+	float value = float(seed);
+	value *= 1.0 / 42596.0;
+	return fract(value);
+}
+
+void main()
+{
+	gl_Position = ModelViewProjectionMatrix * vec4(pos, 1.0);
+	tangent = normalize(NormalMatrix * nor);
+	viewPosition = (ModelViewMatrix * vec4(pos, 1.0)).xyz;
+	colRand = rand(ind);
+}