Updated (multi) indirect draw example

data/shaders/indirectdraw/skysphere.vert

@@ -0,0 +1,28 @@
+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+// Vertex attributes
+layout (location = 0) in vec4 inPos;
+layout (location = 2) in vec2 inUV;
+
+layout (binding = 0) uniform UBO 
+{
+	mat4 projection;
+	mat4 modelview;
+} ubo;
+
+layout (location = 0) out vec2 outUV;
+
+out gl_PerVertex
+{
+	vec4 gl_Position;
+};
+
+void main() 
+{
+	outUV = vec2(inUV.s, 1.0-inUV.t);
+	// Skysphere always at center, only use rotation part of modelview matrix
+	gl_Position = ubo.projection * mat4(mat3(ubo.modelview)) * vec4(inPos.xyz, 1.0);
+}