display slice and wireframe simultaneously

vis/shaders/slice/deferred.vs.glsl

@@ -0,0 +1,27 @@
+#version 440 core
+
+layout(std430, binding=1) buffer Positions {
+    vec4 verts[];
+};
+
+layout(std140, binding=1) uniform Matrices {
+    mat4 proj;
+    mat4 view;
+};
+
+layout(location=0) in ivec4 inds;
+
+out ivec4 vInds;
+
+out gl_PerVertex {
+    vec4 gl_Position;
+    float gl_PointSize;
+};
+
+void main() {
+    vInds = inds;
+
+    vec4 pos = view * verts[vInds.x];
+    gl_Position = proj * vec4(pos.xyz, 1);
+    gl_PointSize = 5;
+}