show the grid with faded out alpha if grid snapping is disabled

git-svn-id: svn://svn.icculus.org/netradiant/trunk@402 61c419a2-8eb2-4b30-bcec-8cead039b335

diff --git a/radiant/xywindow.cpp b/radiant/xywindow.cpp
index 06a9e4a874790e28da8d6033b2bbeb256bdeed98..78206940556389a74394ddbcc8234ea0a21a7bf1 100644 (file)
--- a/radiant/xywindow.cpp
+++ b/radiant/xywindow.cpp
@@ -1737,7 +1737,7 @@ void XYWnd::XY_DrawBackground(void)
 
 void XYWnd::XY_DrawGrid(void) {
        float   x, y, xb, xe, yb, ye;
-       float           w, h;
+       float           w, h, a;
        char    text[32];
        float step, minor_step, stepx, stepy;
        step = minor_step = stepx = stepy = GetGridSize();
@@ -1760,6 +1760,7 @@ void XYWnd::XY_DrawGrid(void) {
        while ((stepy * m_fScale) <= 32.0f) // text step y must be at least 32
                stepy *= 2;
 
+       a = ((GetSnapGridSize() > 0.0f) ? 1.0f : 0.3f);
 
        glDisable(GL_TEXTURE_2D);
        glDisable(GL_TEXTURE_1D);
@@ -1800,9 +1801,12 @@ void XYWnd::XY_DrawGrid(void) {
 
        // djbob
        // draw minor blocks
-       if (g_xywindow_globals_private.d_showgrid) {
+       if (g_xywindow_globals_private.d_showgrid || a < 1.0f) {
+               if(a < 1.0f)
+                       glEnable(GL_BLEND);
+
                if (COLORS_DIFFER(g_xywindow_globals.color_gridminor, g_xywindow_globals.color_gridback)) {
-                       glColor3fv(vector3_to_array(g_xywindow_globals.color_gridminor));
+                       glColor4fv(vector4_to_array(Vector4(g_xywindow_globals.color_gridminor, a)));
 
                        glBegin (GL_LINES);
                        int i = 0;
@@ -1823,8 +1827,8 @@ void XYWnd::XY_DrawGrid(void) {
                }
 
                // draw major blocks
-               if (COLORS_DIFFER(g_xywindow_globals.color_gridmajor, g_xywindow_globals.color_gridback)) {
-                       glColor3fv(vector3_to_array(g_xywindow_globals.color_gridmajor));
+               if (COLORS_DIFFER(g_xywindow_globals.color_gridmajor, g_xywindow_globals.color_gridminor)) {
+                       glColor4fv(vector4_to_array(Vector4(g_xywindow_globals.color_gridmajor, a)));
 
                        glBegin (GL_LINES);
                        for (x = xb ; x <= xe ; x += step) {
@@ -1837,11 +1841,14 @@ void XYWnd::XY_DrawGrid(void) {
                        }
                        glEnd();
                }
+
+               if(a < 1.0f)
+                       glDisable(GL_BLEND);
        }
 
        // draw coordinate text if needed
        if ( g_xywindow_globals_private.show_coordinates) {
-               glColor3fv(vector3_to_array(g_xywindow_globals.color_gridtext));
+               glColor4fv(vector4_to_array(Vector4(g_xywindow_globals.color_gridtext, 1.0f)));
                // why does this not work on windows:
                //   float offx = m_vOrigin[nDim2] + h - (1 + GlobalOpenGL().m_fontAscent) / m_fScale;
                float offx = m_vOrigin[nDim2] + h - 13                                / m_fScale;
@@ -1873,7 +1880,7 @@ void XYWnd::XY_DrawGrid(void) {
        // show current work zone?
        // the work zone is used to place dropped points and brushes
        if (g_xywindow_globals_private.d_show_work) {
-               glColor3f( 1.0f, 0.0f, 0.0f );
+               glColor4f( 1.0f, 0.0f, 0.0f, 1.0f );
                glBegin( GL_LINES );
                glVertex2f( xb, Select_getWorkZone().d_work_min[nDim2] );
                glVertex2f( xe, Select_getWorkZone().d_work_min[nDim2] );
@@ -2973,10 +2980,6 @@ void XYWindow_Construct()
   GlobalPreferenceSystem().registerPreference("SI_Colors6", Vector3ImportStringCaller(g_xywindow_globals.color_gridblock), Vector3ExportStringCaller(g_xywindow_globals.color_gridblock));
   GlobalPreferenceSystem().registerPreference("SI_Colors7", Vector3ImportStringCaller(g_xywindow_globals.color_gridtext), Vector3ExportStringCaller(g_xywindow_globals.color_gridtext));
   GlobalPreferenceSystem().registerPreference("SI_Colors8", Vector3ImportStringCaller(g_xywindow_globals.color_brushes), Vector3ExportStringCaller(g_xywindow_globals.color_brushes));
-  GlobalPreferenceSystem().registerPreference("SI_Colors9", Vector3ImportStringCaller(g_xywindow_globals.color_selbrushes), Vector3ExportStringCaller(g_xywindow_globals.color_selbrushes));
-  GlobalPreferenceSystem().registerPreference("SI_Colors10", Vector3ImportStringCaller(g_xywindow_globals.color_clipper), Vector3ExportStringCaller(g_xywindow_globals.color_clipper));
-  GlobalPreferenceSystem().registerPreference("SI_Colors11", Vector3ImportStringCaller(g_xywindow_globals.color_viewname), Vector3ExportStringCaller(g_xywindow_globals.color_viewname));
-  GlobalPreferenceSystem().registerPreference("SI_Colors13", Vector3ImportStringCaller(g_xywindow_globals.color_gridminor_alt), Vector3ExportStringCaller(g_xywindow_globals.color_gridminor_alt));
   GlobalPreferenceSystem().registerPreference("SI_Colors14", Vector3ImportStringCaller(g_xywindow_globals.color_gridmajor_alt), Vector3ExportStringCaller(g_xywindow_globals.color_gridmajor_alt));