added the readme

shaders/Particle.frag

@@ -0,0 +1,18 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec3 normal;
+in vec2 texCoord;
+in vec3 FragPos;
+
+uniform sampler2D tex;
+uniform vec4 color;
+
+void main()
+{
+    vec4 base = texture(tex,texCoord) * color;
+    if (base.w == 0.0f) {
+        discard;
+    }
+    FragColor = base;
+}