From 985e37eedb9e91fce00a08e3ba961a052d8fa898 Mon Sep 17 00:00:00 2001 From: Brian Date: Tue, 10 Jul 2007 14:46:15 -0600 Subject: clean-up, comments --- progs/trivial/quad-offset-factor.c | 21 +++++---------------- 1 file changed, 5 insertions(+), 16 deletions(-) (limited to 'progs/trivial/quad-offset-factor.c') diff --git a/progs/trivial/quad-offset-factor.c b/progs/trivial/quad-offset-factor.c index becc885ebc5..90943d908ff 100644 --- a/progs/trivial/quad-offset-factor.c +++ b/progs/trivial/quad-offset-factor.c @@ -27,11 +27,6 @@ #include #include - -#define CI_OFFSET_1 16 -#define CI_OFFSET_2 32 - - GLenum doubleBuffer; static void Init(void) @@ -45,7 +40,6 @@ static void Init(void) static void Reshape(int width, int height) { - glViewport(0, 0, (GLint)width, (GLint)height); glMatrixMode(GL_PROJECTION); @@ -56,7 +50,6 @@ static void Reshape(int width, int height) static void Key(unsigned char key, int x, int y) { - switch (key) { case 27: exit(1); @@ -75,7 +68,6 @@ static void quad( float half ) glVertex3f(-half/9.0, half/9.0, -25.0 - half); glVertex3f(-half/9.0, -half/9.0, -25.0 - half); glEnd(); - } static void Draw(void) @@ -83,27 +75,24 @@ static void Draw(void) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnable(GL_DEPTH_TEST); - - + /* red: offset back */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(1, 0); - glColor3f(1,0,0); quad(9); + /* green: no offset */ glDisable(GL_POLYGON_OFFSET_FILL); glColor3f(0,1,0); quad(6); - + /* black: offset zero, should not be visible because of z test */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(0, 0); - - /* Black - should not be visible - */ glColor3f(0,0,0); quad(6); + /* blue: offset forward */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(-1, 0); glColor3f(0,0,1); @@ -163,5 +152,5 @@ int main(int argc, char **argv) glutKeyboardFunc(Key); glutDisplayFunc(Draw); glutMainLoop(); - return 0; + return 0; } -- cgit v1.2.3