/**
* GLUT callback to handle mouse.
*/
void
oth_mouse(int button, int state, int x, int y)
{
int r, f;
GLint hits;
GLuint name_stack[100]; // [FIXME] unnecesserily big ?
GLint viewport[4];
Board* board = current_board;
Camera* camera = current_camera;
if (button != GLUT_LEFT_BUTTON || state != GLUT_DOWN)
return;
glGetIntegerv(GL_VIEWPORT, viewport);
/* Set up viewing for selection mode */
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix(x, viewport[3] - (y - viewport[1] * 2), 2, 2,
viewport);
gluPerspective(camera->frustum.fov, 1.0, camera->frustum.close,
camera->frustum.distant);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
/* Initialize name stack and enter selection mode */
glInitNames();
glSelectBuffer(100, name_stack); // [FIXME]
glRenderMode(GL_SELECT);
/* Force redraw */
oth_display();
/* Restore viewing conditions */
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glFlush();
/* Validate choice */
hits = glRenderMode(GL_RENDER);
if (hits != 1)
return;
r = rank(board, name_stack[3]);
f = file(board, name_stack[3]);
if (!oth_shift_valid(board, r, f))
{
r = f = -1; /* invalid choice */
return;
}
/* Process valid choice */
oth_shift_update(board, r, f);
glutPostRedisplay();
}
/**
* Very simple function to get computer play Othello.
*/
void
oth_comp(void)
{
int rank, file;
Board* board = current_board;
/* Who Am I ? */
if (shift == DARK)
{
rank = rank(board, board->best_dark->name);
file = file(board, board->best_dark->name);
}
else
{ /* LIGHT */
rank = rank(board, board->best_light->name);
file = file(board, board->best_light->name);
}
oth_shift_update(board, rank, file);
}
