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| #include <glut.h>
#include <stdlib.h>
#include <math.h>
#include <windows.h>
#define PI 3.1459
GLfloat R = 640.0 / 480; //Форматное соотношение
GLfloat w = 40; //Ширина мирового окна
GLfloat h; //Высота мирового окна
GLfloat l, r, b, t; //Параметры мирового окна
GLfloat f = 0.0, fz = 0;
GLfloat trans_X = 0.0, trans_Y = 0.0, x_position = 0.0, y_position=0.0;
GLint state = 0;
GLint Trans_X = 0.0, Trans_Y = 0.0, Trans_Z = 0.0;
void init(void)
{
h = w / R; l = -w / 2; r = w / 2; b = -h / 2; t = h / 2; //Расчет параметров миро-вого окна
glClearColor(1.0, 1.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(l, r, b, t);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void reshape(GLsizei W, GLsizei H)
{
if (R > W / H) glViewport(0, 0, W, W / R);
else glViewport(0, 0, H*R, H);
}
void fig0(void)
{
glColor3f(0.0, 0.0, 0.0);
glBegin(GL_LINE_LOOP);
glVertex2f(0.0, 0.0);
glVertex2f(0.0, 4.0);
glVertex2f(5.0, 4.0);
glVertex2f(5.0, 0.0);
glEnd();
}
void showAxis(void)
{
glColor3f(0.0f, 0.0f, 1.0f);
glBegin(GL_LINES);
glVertex2f(0, 0);
glVertex2f(0, t);
glVertex2f(0, 0);
glVertex2f(r, 0);
glEnd();
}
void fig1(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(0.0, 0.0, 0.0);
glBegin(GL_LINE_LOOP);
glVertex2f(x_position, y_position);
glVertex2f(x_position, y_position+1.0);
glVertex2f(x_position+2.5, y_position+1.0);
glVertex2f(x_position + 2.5, y_position);
glEnd();
}
void timer(int)
{
glutSwapBuffers();
glutPostRedisplay();
glutTimerFunc(1000/60, timer, 0);
switch (state)
{
default: state = 0;
case 1:
if (x_position < 5)
x_position += 0.5;
else
state = 2;
break;
case 2:
if (y_position < 4)
y_position += 0.5;
else
state = 3;
break;
case 3:
if (x_position > -2.5)
x_position -= 0.5;
else
state = 4;
break;
case 4:
if (y_position > -1)
y_position -= 0.5;
else
state = 1;
}
//f += 10; if (f == 250) f += -10;
//f = 250;
//if (x_position < 4 && y_position < -4); y_position += 0.5; x_position += 0.5;
}
void scene(void)
{
showAxis();
fig0();
glClear(GL_COLOR_BUFFER_BIT);
fig1();
glPushMatrix();
glRotatef(f, 0.0, 0.0, fz);
glTranslated(Trans_X, Trans_Y, Trans_Z);
fig1();
glPopMatrix();
glFlush();
showAxis();
fig0();
}
void main(int argc, char **argv)
{
glutInit(&argc, argv);
//glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInitWindowSize(640, 480);
glutInitWindowPosition(200, 200);
glutCreateWindow("Myprog");
glutReshapeFunc(reshape);
glutTimerFunc(0, timer, 0);
glutDisplayFunc(scene);
glutIdleFunc(scene);
scene;
init();
glutMainLoop();
} |
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