nehe examples: get per-vertex colors working

Author: rickgaiser

examples/nehe/lesson03/lesson3.cpp

@@ -23,8 +23,13 @@ void init(GLvoid) // Create Some Everyday Functions
     glClearDepth(1.0f);                   // Depth Buffer Setup
     glEnable(GL_DEPTH_TEST);              // Enables Depth Testing
     glDepthFunc(GL_LEQUAL);               // The Type Of Depth Testing To Do
-    //glEnable(GL_COLOR_MATERIAL);
     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+
+    // ps2gl needs lighting + color_material for per-vertex colors
+    glEnable(GL_COLOR_MATERIAL);
+    glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
 }
 
 void display(void)                                      // Create The Display Function

examples/nehe/lesson04/lesson4.cpp

@@ -26,8 +26,13 @@ void init(GLvoid) // Create Some Everyday Functions
     glClearDepth(1.0f);                   // Depth Buffer Setup
     glEnable(GL_DEPTH_TEST);              // Enables Depth Testing
     glDepthFunc(GL_LEQUAL);               // The Type Of Depth Testing To Do
-    //glEnable(GL_COLOR_MATERIAL);
     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+
+    // ps2gl needs lighting + color_material for per-vertex colors
+    glEnable(GL_COLOR_MATERIAL);
+    glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
 }
 
 void display(void)                                      // Create The Display Function

examples/nehe/lesson05/lesson5.cpp

@@ -26,8 +26,13 @@ void InitGL(GLvoid) // Create Some Everyday Functions
     glClearDepth(1.0f);                   // Depth Buffer Setup
     glEnable(GL_DEPTH_TEST);              // Enables Depth Testing
     glDepthFunc(GL_LEQUAL);               // The Type Of Depth Testing To Do
-    //glEnable(GL_COLOR_MATERIAL);
     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+
+    // ps2gl needs lighting + color_material for per-vertex colors
+    glEnable(GL_COLOR_MATERIAL);
+    glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
 }
 
 void display(void)                                      // Create The Display Function