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Decompiled sub_688972

This commit is contained in:
Timmy Weerwag 2015-04-04 14:39:46 +02:00
parent f52ccebbca
commit 5f55bd97be
3 changed files with 50 additions and 11 deletions
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53
src/interface/viewport.c
View File

@ -1453,18 +1453,55 @@ void viewport_paint(rct_viewport* viewport, rct_drawpixelinfo* dpi, int left, in
//RCT2_CALLPROC_X(0x00685CBF, left, top, 0, right, (int)viewport, (int)dpi, bottom);
}
/**
*
* rct2: 0x00688972
* In:
* screen_x: eax
* screen_y: ebx
* Out:
* x: ax
* y: bx
* map_element: edx ?
* viewport: edi
*/
void sub_688972(int screenX, int screenY, sint16 *x, sint16 *y, rct_viewport **viewport) {
int z;
rct_viewport *myViewport;
get_map_coordinates_from_pos(screenX, screenY, 0xFFFE, x, y, &z, NULL, &myViewport);
if (z == 0) {
*x = 0x8000;
return;
}
RCT2_GLOBAL(0x00F1AD34, uint16) = *x;
RCT2_GLOBAL(0x00F1AD36, uint16) = *y;
RCT2_GLOBAL(0x00F1AD38, uint16) = *x + 31;
RCT2_GLOBAL(0x00F1AD3A, uint16) = *y + 31;
rct_xy16 start_vp_pos = screen_coord_to_viewport_coord(myViewport, screenX, screenY);
rct_xy16 map_pos = { *x + 16, *y + 16 };
for (int i = 0; i < 5; i++) {
z = map_element_height(map_pos.x, map_pos.y);
map_pos = viewport_coord_to_map_coord(start_vp_pos.x, start_vp_pos.y, z);
map_pos.x = clamp(RCT2_GLOBAL(0x00F1AD34, uint16), map_pos.x, RCT2_GLOBAL(0x00F1AD38, uint16));
map_pos.y = clamp(RCT2_GLOBAL(0x00F1AD36, uint16), map_pos.y, RCT2_GLOBAL(0x00F1AD3A, uint16));
}
*x = map_pos.x;
*y = map_pos.y;
if (viewport != NULL) *viewport = myViewport;
}
/**
*
* rct2: 0x0068958D
*/
void screen_pos_to_map_pos(short *x, short *y, int *direction)
void screen_pos_to_map_pos(sint16 *x, sint16 *y, int *direction)
{
int eax, ebx, ecx, edx, esi, edi, ebp;
eax = *x;
ebx = *y;
RCT2_CALLFUNC_X(0x00688972, &eax, &ebx, &ecx, &edx, &esi, &edi, &ebp);
*x = eax & ~0x1F;
*y = ebx & ~0x1F;
sub_688972(*x, *y, x, y, NULL);
if (*x == 0x8000)
return;
@ -1492,6 +1529,8 @@ void screen_pos_to_map_pos(short *x, short *y, int *direction)
}
}
*x = *x & ~0x1F;
*y = *y & ~0x1F;
if (direction != NULL) *direction = my_direction;
}

3
src/interface/viewport.h
View File

@ -86,7 +86,8 @@ void sub_689174(sint16* x, sint16* y, sint16 *z);
rct_xy16 screen_coord_to_viewport_coord(rct_viewport *viewport, uint16 x, uint16 y);
rct_xy16 viewport_coord_to_map_coord(int x, int y, int z);
void screen_pos_to_map_pos(short *x, short *y, int *direction);
void sub_688972(int screenX, int screenY, sint16 *x, sint16 *y, rct_viewport **viewport);
void screen_pos_to_map_pos(sint16 *x, sint16 *y, int *direction);
void show_gridlines();
void hide_gridlines();

5
src/interface/window.c
View File

@ -1156,10 +1156,9 @@ void window_rotate_camera(rct_window *w)
sint16 y = (viewport->height >> 1) + viewport->y;
sint16 z;
int ecx, edx, esi, edi = (int)viewport, ebp;
//has something to do with checking if middle of the viewport is obstructed
RCT2_CALLFUNC_X(0x00688972, (int*)&x, (int*)&y, &ecx, &edx, &esi, &edi, &ebp);
rct_viewport *other = (rct_viewport*)edi;
rct_viewport *other;
sub_688972(x, y, &x, &y, &other);
// other != viewport probably triggers on viewports in ride or guest window?
// x is 0x8000 if middle of viewport is obstructed by another window?