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#include "background.h"
#include <SDL/SDL_opengl.h>
#include <cmath>
void Background::draw() {
glClearColor(0.2, 0.2, 0.2, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45, (float)660 / (float)740, 1, 100);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
static float f = 0.0;
f += 0.01;
gluLookAt(
5 * sinf(f), 1, 5 * cosf(f),
0, 0, 0,
5 * sinf(f), 2, 5 * cosf(f));
glBegin(GL_LINES);
for(int i = -10; i < 11; i++) {
if(i % 5 == 0)
glColor3f(1, 1, 1);
else
glColor3f(.5, .5, .5);
glVertex3f(i, 0, -10);
glVertex3f(i, 0, 10);
glVertex3f(-10, 0, i);
glVertex3f(10, 0, i);
}
glEnd();
}
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