sandbox updates

sandbox/shaders/triangle.frag

@@ -0,0 +1,13 @@
+#version 450
+
+//shader input
+layout (location = 0) in vec3 inColor;
+
+//output write
+layout (location = 0) out vec4 outFragColor;
+
+void main()
+{
+	//return red
+	outFragColor = vec4(inColor,1.0f);
+}