128 lines
2.3 KiB
C
128 lines
2.3 KiB
C
/*
|
|
* Test Z values of glBitmap.
|
|
* Brian Paul
|
|
* 19 Feb 2010
|
|
*/
|
|
|
|
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include <GL/glew.h>
|
|
#include <GL/glut.h>
|
|
|
|
|
|
static GLint Win = 0;
|
|
|
|
|
|
static void
|
|
PrintString(const char *s)
|
|
{
|
|
while (*s) {
|
|
glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
|
|
s++;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
Display(void)
|
|
{
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glOrtho(-3.0, 3.0, -3.0, 3.0, -2.0, 2.0);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
glColor3f(1, 1, 1);
|
|
glRasterPos2f(-2.0, 2.6);
|
|
PrintString("Z = -1.0");
|
|
glRasterPos2f(-0.5, 2.6);
|
|
PrintString("Z = 0.0");
|
|
glRasterPos2f(1.0, 2.6);
|
|
PrintString("Z = 1.0");
|
|
|
|
glColor3f(0, 0.4, 0.6);
|
|
glBegin(GL_QUADS);
|
|
glVertex3f(-2.0, -2.5, -1);
|
|
glVertex3f(-1.0, -2.5, -1);
|
|
glVertex3f(-1.0, 2.5, -1);
|
|
glVertex3f(-2.0, 2.5, -1);
|
|
|
|
glVertex3f(-0.5, -2.5, 0);
|
|
glVertex3f(0.5, -2.5, 0);
|
|
glVertex3f(0.5, 2.5, 0);
|
|
glVertex3f(-0.5, 2.5, 0);
|
|
|
|
glVertex3f(1.0, -2.5, 1);
|
|
glVertex3f(2.0, -2.5, 1);
|
|
glVertex3f(2.0, 2.5, 1);
|
|
glVertex3f(1.0, 2.5, 1);
|
|
glEnd();
|
|
|
|
glColor3f(1, 1, 1);
|
|
|
|
glRasterPos3f(-2.0, -1, -1.0);
|
|
PrintString("This is a bitmap string drawn at z = -1.0");
|
|
|
|
glRasterPos3f(-2.0, 0, 0.0);
|
|
PrintString("This is a bitmap string drawn at z = 0.0");
|
|
|
|
glRasterPos3f(-2.0, 1, 1.0);
|
|
PrintString("This is a bitmap string drawn at z = 1.0");
|
|
|
|
glRasterPos3f(-1.5, -2.8, 0.0);
|
|
PrintString("GL_DEPTH_FUNC = GL_LEQUAL");
|
|
|
|
glutSwapBuffers();
|
|
}
|
|
|
|
|
|
static void
|
|
Reshape(int width, int height)
|
|
{
|
|
glViewport(0, 0, width, height);
|
|
}
|
|
|
|
|
|
static void
|
|
Key(unsigned char key, int x, int y)
|
|
{
|
|
if (key == 27) {
|
|
glutDestroyWindow(Win);
|
|
exit(0);
|
|
}
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
|
|
static void
|
|
Init(void)
|
|
{
|
|
glClearColor(0.25, 0.25, 0.25, 0.0);
|
|
glDepthFunc(GL_LEQUAL);
|
|
glEnable(GL_DEPTH_TEST);
|
|
}
|
|
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
glutInitWindowSize(400, 400);
|
|
glutInit(&argc, argv);
|
|
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
|
|
Win = glutCreateWindow(argv[0]);
|
|
glewInit();
|
|
glutReshapeFunc(Reshape);
|
|
glutKeyboardFunc(Key);
|
|
glutDisplayFunc(Display);
|
|
Init();
|
|
glutMainLoop();
|
|
return 0;
|
|
}
|