Commit d64b0422e21f3db511a24f1d8697459a1f0697d2
2001-11-13T01:35:36
Added some comments
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diff --git a/demo/FTGLDemo.c b/demo/FTGLDemo.c
index f680cb5..cd2ae68 100644
--- a/demo/FTGLDemo.c
+++ b/demo/FTGLDemo.c
@@ -89,10 +89,10 @@ void my_lighting()
void do_display (void)
{
-// glTranslatef( posX, posY, posZ);
-
+ // Render the text
font.render( myString);
+ // get the bounding box for the text
int x1, y1, z1, x2, y2, z2;
font.BBox( myString, x1, y1, z1, x2, y2, z2);
@@ -124,17 +124,18 @@ void do_display (void)
glVertex3f( x2, y1, z1);
glVertex3f( x2, y1, z2);
- // Draw the baseline, Ascender and Descender
+ // Draw a line along the basline from the origin to the advance width
glColor3f( 0.0, 0.0, 1.0);
glVertex3f( 0.0, 0.0, 0.0);
glVertex3f( font.Advance( myString), 0.0, 0.0);
+ // Draw a line through the origin from the Ascender height to the Descender
glVertex3f( 0.0, font.Ascender(), 0.0);
glVertex3f( 0.0, font.Descender(), 0.0);
glEnd();
- // Draw the origin
+ // Draw a point on the origin
glColor3f( 1.0, 0.0, 0.0);
glPointSize( 5.0);
glBegin( GL_POINTS);
@@ -179,32 +180,36 @@ void myinit ( const char* fontfile)
glEnable(GL_BLEND);
// glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // GL_ONE
- SetCamera();
+ // Open the font
if( !font.Open( fontfile, false))
{
fprintf( stderr, "Failed to open font %s", fontfile);
exit(1);
}
+ // Set the font size
if( !font.FaceSize( 144))
{
fprintf( stderr, "Failed to set size");
exit(1);
}
+ // Set the depth for extrusion
font.Depth(20);
+ // Initial text "A"
myString[0] = 65;
myString[1] = 0;
+ // Do the track ball initialisation
tbInit(GLUT_LEFT_BUTTON);
tbAnimate( GL_FALSE);
}
-/* ARGSUSED1 */
+
void parsekey(unsigned char key, int x, int y)
{
switch (key)
@@ -241,7 +246,7 @@ void parsekey(unsigned char key, int x, int y)
}
-/* ARGSUSED1 */
+
void parsekey_special(int key, int x, int y)
{
switch (key)