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trivial: Make tri-fog a bit more interesting to look at

This commit is contained in:
Jakob Bornecrantz 2009-02-13 23:03:57 +01:00
parent 89e2b9c6c2
commit b6779056a1
1 changed files with 17 additions and 8 deletions
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25
progs/trivial/tri-fog.c
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@ -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