Refactor: Provide global OpenGL context

GL, GLU and GLUT references can be acquired via BaseContext.
Also remove a useless robots[0].toString() line from RobotsRace.

2 files changed, 58 insertions, 5 deletions

diff --git a/src/BetterBase.java b/src/BetterBase.java
new file mode 100644
index 0000000..2e233ee
--- /dev/null
+++ b/src/BetterBase.java
@@ -0,0 +1,49 @@
+
+import com.jogamp.opengl.util.gl2.GLUT;
+import javax.media.opengl.GL2;
+import javax.media.opengl.glu.GLU;
+import java.awt.Color;
+
+/**
+ * Base class that provides basic bindings to the ugly JOGL interface. This
+ * works around the limitations imposed by JOGL.
+ */
+abstract class BetterBase {
+
+    /**
+     * OpenGL context.
+     */
+    protected static GL2 gl;
+
+    /**
+     * OpenGL Utility instance.
+     */
+    protected static GLU glu;
+    /**
+     * OpenGL Utility Toolkit instance.
+     */
+    protected static GLUT glut;
+
+    public static void setGL(GL2 gl) {
+        BetterBase.gl = gl;
+    }
+
+    public static void setGLU(GLU glu) {
+        BetterBase.glu = glu;
+    }
+
+    public static void setGLUT(GLUT glut) {
+        BetterBase.glut = glut;
+    }
+
+    /**
+     * Utility method to set color.
+     *
+     * @param color An AWT color.
+     */
+    static void setColor(Color color) {
+        // contains four RGBA color components (floats in range 0 to 1)
+        float[] rgba = color.getRGBComponents(null);
+        gl.glColor3fv(rgba, 0);
+    }
+}
diff --git a/src/RobotRace.java b/src/RobotRace.java
index d715a78..9575c56 100644
--- a/src/RobotRace.java
+++ b/src/RobotRace.java
@@ -82,7 +82,10 @@ public class RobotRace extends Base {
      * camera, track, and terrain.
      */
     public RobotRace() {
-        
+        // Initialize global OpenGL provider with GLU and GLUT reference.
+        BetterBase.setGLU(glu);
+        BetterBase.setGLUT(glut);
+
         // Create a new array of four robots
         robots = new Robot[4];
         
@@ -117,7 +120,10 @@ public class RobotRace extends Base {
      * Primarily used to configure OpenGL.
      */
     @Override
-    public void initialize() {        
+    public void initialize() {
+        // Initialize global OpenGL context.
+        BetterBase.setGL(gl);
+
         // Enable blending.
         gl.glEnable(GL_BLEND);
         gl.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
@@ -233,7 +239,7 @@ public class RobotRace extends Base {
         gl.glPushMatrix();
 
         // change color
-        setColor(color);
+        BetterBase.setColor(color);
 
         // draw a thin line from the origin to the right.
         gl.glTranslatef(0.5f, 0, 0);
@@ -631,8 +637,6 @@ public class RobotRace extends Base {
          * selected camera mode.
          */
         public void update(int mode) {
-            robots[0].toString();
-            
             // Helicopter mode
             if (1 == mode) {  
                 setHelicopterMode();