Some consts added

libs_required/ACG/Scenegraph/TextNode.cc

@@ -434,8 +434,8 @@ updateVBO() {
   // *--*--*----*-*
   QFontMetricsF metric(qfont_);
   qreal avgWidth = metric.averageCharWidth();
-  int height = nearestPowerOfTwo(metric.height());
-  float lastCharRight = 0.0f;
+  const int height = nearestPowerOfTwo(metric.height());
+  const float lastCharRight = 0.0f;
   for (unsigned int i = 0; i < text_.size(); ++i) {
 
     // left and right vertex coordinates
@@ -459,14 +459,14 @@ updateVBO() {
 	metricWidth += leftBearing + rightBearing;
 #endif
 
-    float widthTx = (float) metricWidth / (float) imageWidth_;
-    float heightTx = (float) height/ (float) imageHeight_;
+    const float widthTx = (float) metricWidth / (float) imageWidth_;
+    const float heightTx = (float) height/ (float) imageHeight_;
     // get the starting position of the character in the texture
     // note that the characters are drawn aligned to the bottom left in in the texture
-    float leftTx = ((float) charToIndex_[text_[i]].first ) / (float) columns_;
-    float rightTx = leftTx + widthTx;
-    float bottomTx = charToIndex_[text_[i]].second / (float) rows_;
-    float topTx = bottomTx + heightTx;
+    const float leftTx = ((float) charToIndex_[text_[i]].first ) / (float) columns_;
+    const float rightTx = leftTx + widthTx;
+    const float bottomTx = charToIndex_[text_[i]].second / (float) rows_;
+    const float topTx = bottomTx + heightTx;
 
     // bottom left
     vertexBuffer_.push_back(left);