Initial revision

[lsystem3d.git] / lsystem3d / src / callbacks.cpp

diff --git a/lsystem3d/src/callbacks.cpp b/lsystem3d/src/callbacks.cpp
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+// Copyright (C) 2006 Erik Dahlberg
+// 
+// This file is part of LSystem3d.
+// 
+// LSystem3D is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+// 
+// LSystem3D is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with LSystem3D; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+
+
+#include <unistd.h>
+
+#include <GL/freeglut.h>
+
+#include "callbacks.h"
+#include "openglwindow.h"
+
+extern OpenGLWindow *openglWindow;
+
+
+
+// GLUT callback functions
+// -----------------------
+
+/**
+ * Key press
+ * @param key the key
+ * @param x mouse x-coordinate
+ * @param y mouse y-coordinate
+ */
+void glutKeyboardCB(unsigned char key, int x, int y)
+{
+    switch (key)
+    {
+        // quit
+        case 27:    // escape key
+            glutLeaveMainLoop();
+            break;
+    
+        // zoom in
+        case '+':
+            openglWindow->zoomIn();
+            break;
+    
+        // zoom out    
+        case '-':
+            openglWindow->zoomOut();
+            break;
+            
+        // rotate around the y-axis
+        case 'y':
+        case 'Y':
+            openglWindow->rotateY();
+    
+        default:
+            break;
+    }
+}
+
+
+
+/**
+ * Special key press
+ * @param key the key
+ * @param x mouse x-coordinate
+ * @param y mouse y-coordinate
+ */
+void glutSpecialCB(int key, int x, int y)
+{
+    switch (key)
+    {
+        // move camera left
+        case GLUT_KEY_LEFT:
+            openglWindow->left();
+            break;
+    
+        // move camera right
+        case GLUT_KEY_RIGHT:
+            openglWindow->right();
+            break;
+    
+        // move camera up
+        case GLUT_KEY_UP:
+            openglWindow->up();
+            break;
+    
+        // move camera down
+        case GLUT_KEY_DOWN:
+            openglWindow->down();
+            break;
+            
+        // move camera forth
+        case GLUT_KEY_PAGE_UP:
+            openglWindow->forth();
+            break;
+            
+        // move camera back
+        case GLUT_KEY_PAGE_DOWN:
+            openglWindow->back();
+            break;
+    
+        default:
+            break;
+    }
+}
+
+
+
+/**
+ * Redraw of screen
+ */
+void glutDisplayCB()
+{
+    openglWindow->draw();
+}
+
+
+
+/**
+ * Idling
+ */
+void glutIdleCB()
+{
+    // spare some cpu cycles
+    usleep(1);
+}
+
+
+
+// GLUI callback functions
+// -----------------------
+
+/**
+ * Angle changes
+ * @param id not used
+ */
+void gluiSpinnerAngleCB(int id)
+{
+    // regenerate and draw l-system only if "live mode" is enabled
+    
+    if (openglWindow->liveActivated())
+    {
+        openglWindow->generate();
+        glutPostRedisplay();
+    }
+}
+
+
+
+/**
+ * Reset button pressed
+ * @param id not used
+ */
+void gluiButtonResetCB(int id)
+{
+    // place camera at initial position
+    openglWindow->defaultView();
+}
+
+
+
+/**
+ * Generate button pressed
+ * @param id not used
+ */
+void gluiButtonGenerateCB(int id)
+{
+    openglWindow->generate();
+}