Added a basic mesh shader example

data/shaders/glsl/meshshader/meshshader.frag

@@ -0,0 +1,19 @@
+/* Copyright (c) 2021, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#version 450
+ 
+layout (location = 0) in VertexInput {
+  vec4 color;
+} vertexInput;
+
+layout(location = 0) out vec4 FragColor;
+ 
+
+void main()
+{
+  FragColor = vertexInput.color;
+}

data/shaders/glsl/meshshader/meshshader.mesh

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+/* Copyright (c) 2021, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#version 450
+#extension GL_EXT_mesh_shader : require
+
+layout (binding = 0) uniform UBO 
+{
+	mat4 projection;
+	mat4 model;
+	mat4 view;
+} ubo;
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+layout(triangles, max_vertices = 3, max_primitives = 1) out;
+
+layout(location = 0) out VertexOutput
+{
+  vec4 color;
+} vertexOutput[];
+
+void main()
+{
+  SetMeshOutputsEXT(3, 1);
+  mat4 mvp = ubo.projection * ubo.view * ubo.model;
+  gl_MeshVerticesEXT[0].gl_Position = mvp * vec4( 0.0, -1.0, 0.0, 1.0);
+  gl_MeshVerticesEXT[1].gl_Position = mvp * vec4(-1.0,  1.0, 0.0, 1.0);
+  gl_MeshVerticesEXT[2].gl_Position = mvp * vec4( 1.0,  1.0, 0.0, 1.0);
+  vertexOutput[0].color = vec4(0.0, 1.0, 0.0, 1.0);
+  vertexOutput[1].color = vec4(0.0, 0.0, 1.0, 1.0);
+  vertexOutput[2].color = vec4(1.0, 0.0, 0.0, 1.0);
+  gl_PrimitiveTriangleIndicesEXT[gl_LocalInvocationIndex] =  uvec3(0, 1, 2);
+}