i'mI'm trying to make a basic snake game with OpenGL. I hold all the game object locations in a matrix called MAP. And when i render them, i operate the location info from MAP (that comes as x and y [0 < x < 40 and 0 < y < 20]) so that i can use it in the glTranslatef().
Some objects only rendering half of the screen in sneake game
i'm trying to make a basic snake game with OpenGL. I hold all the game object locations in a matrix called MAP. And when i render them, i operate the location info from MAP (that comes as x and y [0 < x < 40 and 0 < y < 20]) so that i can use it in the glTranslatef().
I use the same equation for all objects. Snake's head is rendering correctly and can be move to anywhere in the screen but tails and bait are only rendering to half of the screen. Here's the code:
void SetLocationE()
{
glLoadIdentity();
glTranslatef(-11.5f, -8.125f, .0f);
}
void ScreenBuffer::RenderToScreen(GLvoid)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* DRAW */
for (int i = 0; i < 20; i++)
{
for (int j = 0; j < 40; j++)
{
if (MAP[i][j] == 'x')
{
SetLocationE();
bx = j;
by = i;
/* BAIT */
bxx = bx * 23 / 40;
byy = by * 16.25 / 40;
glTranslatef(bxx, byy, zet);
glBegin(GL_QUADS);
//painting
glColor3f(0.0f, 0.0f, 0.0f);
//drawing TOP RIGHT -> TOP LEFT
// -> BOTTOM LEFT -> BOTTOM RIGHT
glVertex3f(0.15f, 0.15f, .0f); //tr
glVertex3f(-0.15f, 0.15f, .0f); //tl
glVertex3f(-0.15f, -0.15f, .0f); //bl
glVertex3f(0.15f, -0.15f, .0f); //br
glEnd();
}
else if (MAP[i][j] == '0')
{
SetLocationE();
hx = j;
hy = i;
/* HEAD */
hxx = hx * 23 / 40;
hyy = hy * 16.25 / 20;
glTranslatef(hxx, hyy, zet);
glBegin(GL_QUADS);
//painting
glColor3f(0.0f, 0.3f, 0.1f);
//drawing TOP RIGHT -> TOP LEFT
// -> BOTTOM LEFT -> BOTTOM RIGHT
glVertex3f(0.15f, 0.15f, .0f); //tr
glVertex3f(-0.15f, 0.15f, .0f); //tl
glVertex3f(-0.15f, -0.15f, .0f); //bl
glVertex3f(0.15f, -0.15f, .0f); //br
glEnd();
}
else if (MAP[i][j] == 'o')
{
SetLocationE();
/* TAIL */
txx = j * 23 / 40;
tyy = i * 16.25 / 40;
glTranslatef(txx, tyy, zet);
glBegin(GL_QUADS);
//painting
glColor3f(0.0f, 0.7f, 0.2f);
//drawing TOP RIGHT -> TOP LEFT
// -> BOTTOM LEFT -> BOTTOM RIGHT
glVertex3f(0.15f, 0.15f, .0f); //tr
glVertex3f(-0.15f, 0.15f, .0f); //tl
glVertex3f(-0.15f, -0.15f, .0f); //bl
glVertex3f(0.15f, -0.15f, .0f); //br
glEnd();
}
}
}
}
Moving of the head is correct. When out of borders, it reappears again. Same thing is available for the tails but they reappear if they are at the horizontally half line. Tails and bait is rendering between red lines:
It was a console game at first. Now i'm trying to implement OpenGL to the old codes. I don't know what causes this. Thanks in advance.