Question

我用C ++几次使用Box2D，但第一次看到这样的事情。我创建了两个对象，相同的宽度和高度为25像素。第一个初始位置是[25,25]，第二个是[25,75]当我第一次移动时，碰撞开始于[25,25]。此外，当第一个对象从[25,200]开始并向下移动时，碰撞开始于[25,125]。看起来固定装置应该更大。

这是Box2D重新发布的部分代码：

return false

有什么想法吗？

编辑：

好的，我找到了DebugDraw的SDL版本。它看起来像那样

int account, minutes1, minutes2;
char s;
float cost; 


printf("Please enter your account number. \n");
scanf_s("%d" , &account);

if(account == -1)
    return 0;

printf("Please enter your service code(r for regular or p for premium). \n"); /*checking service*/
scanf_s(" %s" , &s);

switch(s)
{ /*execute specific parameters when r or p are selected as service codes.*/
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
case 'k':
case 'l':
case 'm':
case 'n':
case 'o': printf("Error. Please choose a correct service code (r for regular or p for premium). \n"); 
    break;
case 'p': printf("Please enter how many minutes you've used between 6am and 6pm. \n");
    scanf_s("%d" , &minutes1); 
    if(minutes1 > 75)
        minutes1 = (minutes1-75)*.10;
    printf("Please enter how many minutes you've used between 7pm and 5am. \n");
    scanf_s("%d" , &minutes2);
    if(minutes2 > 100)
        minutes2 = (minutes2-100)*.05;
    cost = 25+minutes1+minutes2;
    printf("Your account number is %d, your service code is premium, you used %d minutes during the day and %d minutes during the night and your bill comes to $%lf. \n", account, minutes1, minutes2, cost);
    break;
case 'q':
case 'r': printf("Please enter how many minutes you've used. \n");
    scanf_s("%d", &minutes1); 
    if(minutes1 > 55)
        minutes1 = (minutes1-55)*.20;
    cost = 10+minutes1;
    printf("Your account number is %d, your service code is regular, you used %d minutes and your bill comes to %lf. \n");
    break;
case 's':
case 't':
case 'u':
case 'v':
case 'w':
case 'x':
case 'y':
case 'z': printf("Error. Please choose a correct service code (r for regular or p for premium). \n"); 
    break;
}`

但它不起作用，因为h总是等于0.它确实等于0，因为顶点[0] .y总是等于顶点[1] .y。顶点值也不正确。对象的位置是[50,25]，但顶点x和y等于[25,0]。

有什么想法吗？

Box2D - 碰撞系统怪异，夹具太大了

0 个答案: