Functions | |
void | Show_Window (float *left, float *right, float *bottom, float *top) |
void | PShow_Net_Window (int key_count, const HC_KEY *path_keys, float *left, float *right, float *bottom, float *top) |
void Show_Window | ( | float * | left, | |
float * | right, | |||
float * | bottom, | |||
float * | top | |||
) |
Returns the amount of screen used by the currently open segment upon display.
left | - Minimum limit, along the horizontal axis of the screen. The leftmost edge is at -1. Passed by reference. Returned to user. | |
right | - Maximum limit, along the horizontal axis of the screen. The rightmost edge is at +1. Passed by reference. Returned to user. | |
bottom | - Minimum limit, along the vertical axis of the screen. The lowest possible position is at -1. Passed by reference. Returned to user. | |
top | - Maximum limit, along the vertical axis of the screen. The highest possible position is at +1. Passed by reference. Returned to user. |
When the value being passed back is a string, be sure you've declared your string variable to be long enough.
In C, "passed by reference" means that you have to allocate an appropriate variable, either statically or off the stack, and pass a pointer to that variable to the HOOPS routine. To generate a pointer to a variable C, you prefix the variable with a "&". In other languages you normally don't have to do anything different from usual.
The Show_Window() routines will complain if they're called and the attribute is not actually set in the segment. Use Show_Existence() to avoid this, if necessary.
void PShow_Net_Window | ( | int | key_count, | |
const HC_KEY * | path_keys, | |||
float * | left, | |||
float * | right, | |||
float * | bottom, | |||
float * | top | |||
) |
Similar to Show_Window() but returns the net effective setting along a discrete segment path.
key_count | - The size of pathkeys | |
path_keys | - An array of HC_KEY's delineating a path of segments. | |
left | - Minimum limit, along the horizontal axis of the screen. The leftmost edge is at -1. Passed by reference. Returned to user. | |
right | - Maximum limit, along the horizontal axis of the screen. The rightmost edge is at +1. Passed by reference. Returned to user. | |
bottom | - Minimum limit, along the vertical axis of the screen. The lowest possible position is at -1. Passed by reference. Returned to user. | |
top | - Maximum limit, along the vertical axis of the screen. The highest possible position is at +1. Passed by reference. Returned to user. |
By default, HOOPS will determine the Net attribute from the last specified key all the way to the root. If you add -1 at the end of the array, the PShow_Net routines will not proceed beyond the end of the last specified key.
For other details, see Show_Window()