1 files changed, 65 insertions, 13 deletions
diff --git a/headtrack_stereo_demo/src/glutcallbacks.cpp b/headtrack_stereo_demo/src/glutcallbacks.cpp
index 9b582f8..6002a85 100644
--- a/headtrack_stereo_demo/src/glutcallbacks.cpp
+++ b/headtrack_stereo_demo/src/glutcallbacks.cpp
@@ -1,6 +1,7 @@
 #include <wiimote.h>
 #include <GL\glew.h>
 #include <GL\glut.h>
+#include <stdlib.h>
 
 #include "typedefs.h"
 #include "stereoheadtrackfrustum.h"
@@ -23,6 +24,13 @@ void ExitProgram()
   exit(0);
 }
 
+inline void GSConvScaleChange(int index, GLfloat delta)
+{
+  g_GameState.m_GSConvScale[index] += delta;
+  if (g_GameState.m_bStereoEnabled) 
+    glUniform3fv(g_GameState.m_GSConvScaleLoc, 1, g_GameState.m_GSConvScale);
+}
+
 void Keyboard(unsigned char f_cKey, int f_iX, int f_iY)
 {
   switch(f_cKey)
@@ -36,17 +44,6 @@ void Keyboard(unsigned char f_cKey, int f_iX, int f_iY)
   case 's':
   case 'S': //enable /disable stereo vision
     g_GameState.m_bStereoEnabled = !g_GameState.m_bStereoEnabled;
-
-    if (g_GameState.m_bStereoEnabled)
-    {
-      //enable greyscale shader
-      glUseProgram(g_GameState.m_GreyScaleShaderProgram);
-    }
-    else
-    {
-      //disable greyscale shader
-      glUseProgram(0);
-    }
     break;
 
   case 'h':
@@ -74,6 +71,15 @@ void Keyboard(unsigned char f_cKey, int f_iX, int f_iY)
     //  }
     //}
     break;
+
+  case 'u': GSConvScaleChange(0,  0.05); break;
+  case 'j': GSConvScaleChange(0, -0.05); break;
+
+  case 'i': GSConvScaleChange(1,  0.05); break;
+  case 'k': GSConvScaleChange(1, -0.05); break;
+
+  case 'o': GSConvScaleChange(2,  0.05); break;
+  case 'l': GSConvScaleChange(2, -0.05); break;
   }
 }
 
@@ -86,6 +92,11 @@ void Display(void)
 
   if (g_GameState.m_bStereoEnabled)
   {
+    //enable grayscale shader
+    glUseProgram(g_GameState.m_GreyScaleShaderProgram);
+    //set the conversion scale
+    glUniform3fv(g_GameState.m_GSConvScaleLoc, 1, g_GameState.m_GSConvScale);
+    
     for (int CurrentEye=0; CurrentEye<2; CurrentEye++) //STEREO_LEFT_EYE = 0, STEREO_RIGHT_EYE = 1
     {
       l_bEyeLocated = false;
@@ -123,6 +134,8 @@ void Display(void)
       RenderScene();
     }
     glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+    //disable greyscale shader
+    glUseProgram(0);
   }
   else // !g_GameState.m_bStereoEnabled
   {
@@ -150,9 +163,48 @@ void Display(void)
 
     RenderScene();
   }
-    
-  glutSwapBuffers();
 
+  GLdouble width = (GLdouble)glutGet(GLUT_SCREEN_WIDTH),
+           height = (GLdouble)glutGet(GLUT_SCREEN_HEIGHT);
+  glMatrixMode(GL_PROJECTION);
+  glPushMatrix();
+  glLoadIdentity();
+  glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
+  glScaled(1.0, -1.0, 1.0);
+  glTranslatef(0.0, -height, 0.0);
+  
+  glMatrixMode(GL_MODELVIEW);
+  glPushAttrib(GL_LIGHTING_BIT);
+  glShadeModel(GL_FLAT);
+  glDisable(GL_LIGHTING);
+  glPushMatrix();
+  glLoadIdentity();
+  glBegin(GL_QUADS);
+  glColor3f(0.2f, 0.2f, 0.2f);
+  glVertex3f(0.0f, 0.0f, -0.5f);
+  glVertex3f(0.0f, 30.0f, -0.5f);
+  glVertex3f(325.0f, 30.0f, -0.5f);
+  glVertex3f(325.0f, 0.0f, -0.5f);
+  glEnd();
+
+  glColor3f(1.0, 1.0, 1.0);
+  glRasterPos3f(5.0, 22.0, 0.5);
+  char string[256];
+  sprintf(string, "RGB conv scale: %4.3f, %4.3f, %4.3f", 
+    g_GameState.m_GSConvScale[0],
+    g_GameState.m_GSConvScale[1],
+    g_GameState.m_GSConvScale[2]);
+  int len = strlen(string);
+  for (int i=0; i<len; i++)
+    glutBitmapCharacter(GLUT_BITMAP_9_BY_15, string[i]);
+
+  glPopMatrix();
+  glMatrixMode(GL_PROJECTION);
+  glPopMatrix();
+
+  glPopAttrib();
+  
+  glutSwapBuffers();
 } // Display