shapes demo: added flat shading option (fixed-function only)

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1866 7f0cb862-5218-0410-a997-914c9d46530a

diff --git a/progs/demos/shapes/shapes.c b/progs/demos/shapes/shapes.c
index 69c0a1a..09fb5ef 100644 (file)
--- a/progs/demos/shapes/shapes.c
+++ b/progs/demos/shapes/shapes.c
@@ -425,6 +425,7 @@ static GLboolean persProject = GL_TRUE;
 static GLboolean animateXRot = GL_FALSE;
 static GLboolean useShader   = GL_FALSE;
 static GLboolean visNormals  = GL_FALSE;
+static GLboolean flat;
 
 /*
  * Enum to tell drawSizeInfo what to draw for each object
@@ -653,10 +654,15 @@ static void drawInfo()
         shapesPrintf (row++, 1, "Perspective projection (p)");
     else
         shapesPrintf (row++, 1, "Orthographic projection (p)");
-    if (useShader)
+    if (useShader) {
         shapesPrintf (row++, 1, "Using shader (s)");
-    else
+    } else {
         shapesPrintf (row++, 1, "Using fixed function pipeline (s)");
+        if (flat)
+            shapesPrintf (row++, 1, "Flat shading (f)");
+        else
+            shapesPrintf (row++, 1, "Smooth shading (f)");
+    }
     if (animateXRot)
         shapesPrintf (row++, 1, "2D rotation (r)");
     else
@@ -683,6 +689,8 @@ static void display(void)
 
     glutSetOption(GLUT_GEOMETRY_VISUALIZE_NORMALS,visNormals);  /* Normals visualized or not? */
 
+    glShadeModel(flat ? GL_FLAT : GL_SMOOTH);  /* flat or gouraud shading */
+
     if (useShader && !shaderReady)
         initShader();
 
@@ -820,6 +828,11 @@ key(unsigned char key, int x, int y)
                 function_index = 0;
         break;
 
+    case 'F':
+    case 'f':
+        flat ^= 1;
+        break;
+
     case 'N':
     case 'n': visNormals=!visNormals;     break;