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press 'f' to toggle GL_CCW/GL_CW front face

This commit is contained in:
Brian 2007-07-10 11:53:27 -06:00
parent 9a89cc3b6b
commit 24b68f4184
1 changed files with 14 additions and 18 deletions
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32
progs/trivial/tri-edgeflag.c
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@ -27,25 +27,18 @@
#include <stdlib.h>
#include <GL/glut.h>
#define CI_OFFSET_1 16
#define CI_OFFSET_2 32
GLenum doubleBuffer;
static GLenum doubleBuffer;
static GLenum frontface = GL_CCW;
static void Init(void)
{
fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
glClearColor(0.0, 0.0, 1.0, 0.0);
}
static void Reshape(int width, int height)
{
glViewport(0, 0, (GLint)width, (GLint)height);
glMatrixMode(GL_PROJECTION);
@ -56,13 +49,16 @@ static void Reshape(int width, int height)
static void Key(unsigned char key, int x, int y)
{
switch (key) {
case 27:
exit(1);
default:
return;
}
switch (key) {
case 'f':
frontface = (frontface == GL_CCW) ? GL_CW : GL_CCW;
glFrontFace(frontface);
break;
case 27:
exit(1);
default:
return;
}
glutPostRedisplay();
}
@ -75,7 +71,7 @@ static void Draw(void)
glBegin(GL_TRIANGLES);
glEdgeFlag(1);
glColor3f(0,0,.7);
glColor3f(0.3,0.3,.9);
glVertex3f( 0.9, -0.9, -0.0);
glEdgeFlag(0);
glColor3f(.8,0,0);
@ -137,5 +133,5 @@ int main(int argc, char **argv)
glutKeyboardFunc(Key);
glutDisplayFunc(Draw);
glutMainLoop();
return 0;
return 0;
}