diff options
Diffstat (limited to 'progs/trivial/tri-fog.c')
| -rw-r--r-- | progs/trivial/tri-fog.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/progs/trivial/tri-fog.c b/progs/trivial/tri-fog.c index 75f3262ecf4..a2e12f8870a 100644 --- a/progs/trivial/tri-fog.c +++ b/progs/trivial/tri-fog.c @@ -42,6 +42,15 @@ static void Init(void) fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); glClearColor(0.0, 0.0, 1.0, 0.0); + + glEnable(GL_FOG); + glFogi(GL_FOG_MODE, GL_LINEAR); + glFogf(GL_FOG_START, 25); + glFogf(GL_FOG_END, 35); +#if 0 + glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + glEnable (GL_BLEND); +#endif } static void Reshape(int width, int height) @@ -70,26 +79,26 @@ static void Key(unsigned char key, int x, int y) static void Draw(void) { - glClear(GL_COLOR_BUFFER_BIT); + glClear(GL_COLOR_BUFFER_BIT); glEnable(GL_FOG); glBegin(GL_TRIANGLES); - glColor3f(0,0,.7); + glColor3f(1,1,1); glVertex3f( 0.9, -0.9, -30.0); - glColor3f(.8,0,0); + glColor3f(1,1,1); glVertex3f( 0.9, 0.9, -30.0); - glColor3f(0,.9,0); - glVertex3f(-0.9, 0.0, -30.0); + glColor3f(1,1,1); + glVertex3f(-0.9, 0.0, -40.0); glEnd(); #if 0 glBegin(GL_TRIANGLES); - glColor3f(0,0,.7); + glColor3f(0,0,.7); glVertex3f(-0.9, -0.9, -30.0); - glColor3f(.8,0,0); + glColor3f(.8,0,0); glVertex3f(-0.9, 0.9, -30.0); - glColor3f(0,.9,0); + glColor3f(0,.9,0); glVertex3f( 0.9, 0.0, -30.0); glEnd(); #endif |