[FIX] proper lighting (zoom-invariant) for the template module

src/core/graphicsEngine/shaders/shaders/WGELighting-vertex.glsl

@@ -34,7 +34,13 @@ void main()
     // prepare light
     v_normal = gl_NormalMatrix * gl_Normal;
 
-    gl_FrontColor = gl_Color;
+#ifdef USE_MATERIAL_DIFFUSE
+    vec4 color = gl_FrontMaterial.diffuse;
+#else
+    vec4 color = gl_Color;
+#endif
+    gl_FrontColor = color;
+    gl_BackColor = color;
     gl_Position = ftransform();
 }
 

src/modules/template/WMTemplate.cpp

@@ -436,6 +436,16 @@ void WMTemplate::moduleMain()
     waitRestored();
     // This always returns if you manually add your module and no project file loader or something similar has to restore any values.
 
+    // Before we begin, we finally create a shader object which shades the graphics we create in this module. You can use your own shaders or a
+    // global one, like WGELighting. When creating a shader, you need to specify its name and an optional search path. When developing modules,
+    // this search path should be you module's local resource path.
+    m_shader = new WGEShader( "WGELighting", m_localPath );
+
+    // Later in the code, we show how we use a property to modify the graphics color. There, we use the OpenGL material mechanism. So we need to
+    // switch the shader to this mode by setting a compile-time switch:
+    m_shader->setDefine( "USE_MATERIAL_DIFFUSE" );
+    // There are multiple ways to set uniforms and defines automatically by binding them to properties. But this is not the topic of this module.
+
     // Normally, you will have a loop which runs as long as the module should not shutdown. In this loop you can react on changing data on input
     // connectors or on changed in your properties.
     debugLog() << "Entering main loop";
@@ -587,6 +597,10 @@ void WMTemplate::moduleMain()
             // right? Setting the color can be done in such an update callback. See in the header file, how this class is defined.
             m_geode->addUpdateCallback( new SafeUpdateCallback( this ) );
 
+            // The default lighting is not very pretty. We can bind a default shader provided by OpenWalnut to this geode to have nice per-pixel
+            // Phong shading. We earlier created this shader object. Now, we need to apply it:
+            m_shader->apply( m_geode );
+
             // And insert the new node
             m_rootNode->insert( m_geode );
         }

src/modules/template/WMTemplate.h

@@ -33,6 +33,7 @@
 #include "core/common/WItemSelector.h"
 
 #include "core/graphicsEngine/WGEManagedGroupNode.h"
+#include "core/graphicsEngine/shaders/WGEShader.h"
 
 #include "core/kernel/WModule.h"
 #include "core/kernel/WModuleInputData.h"
@@ -302,6 +303,11 @@ private:
      */
     void hideButtonPressed();
 
+    /**
+     * We want some nice shading effects, so we need a nice shader.
+     */
+    WGEShader::RefPtr m_shader;
+
     /**
      * Node callback to change the color of the shapes inside the root node. For more details on this class, refer to the documentation in
      * moduleMain().