我正在使用 OpenGL 和 GLFW 用 C++ 编写 Snake。我正在尝试实现一个游戏退出的功能,当蛇头撞到它的身体时。这是我编写的 Snake 类的 move() 和 CrashCheck() 函数。x_pos 是一个浮点数组,存储了蛇身的一段 x_coordinate。y_pos 与 y_coordinate 相同。length 是蛇的身体节段数,当蛇吃东西时会增加(尚未实现)。x_speed 和 y_speed 存储沿轴的段的速度。蛇永远不能同时沿着两个轴移动;还,float MAX_S = 0.00075;
. 我也包含了我的 draw() 函数。而Fix_Snake_x 和Fix_Snake_y 是重新对齐蛇的片段的函数(因为它们不断分离并对游戏造成严重破坏)。我知道这是纠正问题的愚蠢方法,因此如果您可以在 move() 函数中提出修复建议,那将很有帮助。
void draw(float win_aspect)
{
for(int a = 0; a < length; a++)
{
Fix_Snake_y();
glBegin(GL_QUADS);
glColor3f(1.0,0.0,0.0);
glVertex2f(x_pos[a],y_pos[a]);
glVertex2f((x_pos[a]+0.05),y_pos[a]);
glVertex2f((x_pos[a]+0.05),y_pos[a]-0.05);
glVertex2f(x_pos[a],y_pos[a] - 0.05);
glEnd();
Fix_Snake_x();
}
}
void move()
{
for(int a = length ; a >= 0; a--)
{
if(a > 0)
{
if(x_pos[a] >= x_pos[a-1] && x_speed[a] < 0)
{
x_pos[a] += -MAX_S;
Fix_Snake_y();
Fix_Snake_x();
if(x_pos[a] <= x_pos[a - 1])
{
x_speed [a] = 0;
if(y_pos[a] <= y_pos[a-1])
{
y_speed[a] = MAX_S;
}
else
{
y_speed[a] = -MAX_S;
}
}
}
if(x_pos[a] <= x_pos[a-1] && x_speed[a] > 0)
{
x_pos[a] += MAX_S;
Fix_Snake_y();
Fix_Snake_x();
if(x_pos[a] >= x_pos[a - 1])
{
x_speed [a] = 0;
if(y_pos[a] <= y_pos[a-1])
{
y_speed[a] = MAX_S;
}
else
{
y_speed[a] = -MAX_S;
}
}
}
if(y_pos[a] <= y_pos[a-1] && y_speed[a] > 0)
{
y_pos[a] += MAX_S;
Fix_Snake_y();
Fix_Snake_x();
if(y_pos[a] >= y_pos[a-1])
{
y_speed[a] = 0;
if(x_pos[a] >= x_pos[a-1])
{
x_speed[a] = -MAX_S;
}
if(x_pos[a] <= x_pos[a-1])
{
x_speed[a] = MAX_S;
}
}
}
if(y_pos[a] >= y_pos[a-1] && y_speed[a] < 0)
{
y_pos[a] += -MAX_S;
Fix_Snake_y();
Fix_Snake_x();
if(y_pos[a] <= y_pos[a-1])
{
y_speed[a] = 0;
if(x_pos[a] >= x_pos[a-1])
{
x_speed[a] = -MAX_S;
}
if(x_pos[a] <= x_pos[a-1])
{
x_speed[a] = MAX_S;
}
}
}
}
if(a == 0)
{
x_pos[0] += x_speed[0];
y_pos[0] += y_speed[0];
Fix_Snake_y();
Fix_Snake_x();
}
CrashCheck();
}
}
void CrashCheck()
{
for(int a = 1; a < length; a++)
{
if(y_speed[0] > 0 && y_speed[a] == 0)
{
if(x_pos[0] < x_pos[a] && x_pos[0] < x_pos[a] + 0.05)
{
if(y_pos[0] < y_pos[a] && y_pos[0] > y_pos[a] - 0.05)
{
exit(0);
}
}
}
else if(y_speed[0] < 0 && y_speed[a] == 0)
{
if(x_pos[0] > x_pos[a] && x_pos[0] < x_pos[a] + 0.05)
{
if(y_pos[0] < y_pos[a] && y_pos[0] > y_pos[a] - 0.05)
{
exit(0);
}
}
}
}
}
void Fix_Snake_x()
{
for(int a = 1; a<length; a++)
{
if(a > 0)
{
if(x_pos[a] <= x_pos[a-1] - 0.05)
{
x_pos[a] = x_pos[a-1] - 0.05;
}
if(x_pos[a] >= x_pos[a -1] + 0.05)
{
x_pos[a] = x_pos[a-1] + 0.05;
}
}
}
}
void Fix_Snake_y()
{
for(int a = 1; a < length; a++)
{
if(a > 0)
{
if(y_pos[a] <= y_pos[a-1] - 0.05)
{
y_pos[a] = y_pos[a-1] - 0.05;
}
if(y_pos[a] >= y_pos[a-1] + 0.05)
{
y_pos[a] = y_pos[a-1] + 0.05;
}
}
}
}
编辑:新的移动功能
for(int a = 0; a < length; a++)
{
if(a > 0)
{
if(x_speed[a] < 0 && x_pos[a] >= x_pos[a-1])
{
x_pos[a] += x_speed[a];
if(x_pos[a] == x_pos[a-1])
{
y_speed[a] = y_speed[a-1];
x_speed[a] = 0;
continue;
}
}
if(x_speed[a] > 0 && x_pos[a] <= x_pos[a-1])
{
x_pos[a] += x_speed[a];
if(x_pos[a] == x_pos[a-1])
{
y_speed[a] = y_speed[a-1];
x_speed[a] = 0;
continue;
}
}
if(y_speed[a] > 0 && y_pos[a] <= y_pos[a-1])
{
y_pos[a] += y_speed[a];
if(y_pos[a] == y_pos[a-1])
{
x_speed[a] = x_speed[a-1];
y_speed[a] = 0;
}
}
if(y_speed[a] < 0 && y_pos[a] >= y_pos[a-1])
{
y_pos[a] += y_speed[a];
if(y_pos[a] == y_pos[a-1])
{
x_speed[a] = x_speed[a-1];
y_speed[a] = 0;
}
}
}
else
{
x_pos[0] += x_speed[0];
y_pos[0] += y_speed[0];
}
}
造成一些问题。蛇打破它有太多的同时转弯。只有前两个块保持运动