Tech ENABLE_GL_SHADERS_ATTRIBUTES - Added shaders for glsl version 140

resources/shaders/140/toolpaths_cog.fs

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+#version 140
+
+const vec4 BLACK = vec4(vec3(0.1), 1.0);
+const vec4 WHITE = vec4(vec3(1.0), 1.0);
+
+const float emission_factor = 0.25;
+
+uniform vec3 world_center;
+
+// x = tainted, y = specular;
+in vec2 intensity;
+in vec3 world_position;
+
+void main()
+{
+    vec3 delta = world_position - world_center;
+    vec4 color = delta.x * delta.y * delta.z > 0.0 ? BLACK : WHITE;
+    gl_FragColor = vec4(vec3(intensity.y) + color.rgb * (intensity.x + emission_factor), 1.0);
+}