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Decompiled screen_pos_to_map_pos

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This commit is contained in:
Timmy Weerwag
2015-04-04 12:32:35 +02:00
parent b20efdada8
commit f52ccebbca
3 changed files with 34 additions and 6 deletions
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36
src/interface/viewport.c
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@@ -1457,14 +1457,42 @@ void viewport_paint(rct_viewport* viewport, rct_drawpixelinfo* dpi, int left, in
*
* rct2: 0x0068958D
*/
void screen_pos_to_map_pos(short *x, short *y)
void screen_pos_to_map_pos(short *x, short *y, int *direction)
{
int eax, ebx, ecx, edx, esi, edi, ebp;
eax = *x;
ebx = *y;
RCT2_CALLFUNC_X(0x0068958D, &eax, &ebx, &ecx, &edx, &esi, &edi, &ebp);
*x = eax & 0xFFFF;
*y = ebx & 0xFFFF;
RCT2_CALLFUNC_X(0x00688972, &eax, &ebx, &ecx, &edx, &esi, &edi, &ebp);
*x = eax & ~0x1F;
*y = ebx & ~0x1F;
if (*x == 0x8000)
return;
int my_direction;
int dist_from_center_x = abs(*x % 32);
int dist_from_center_y = abs(*y % 32);
if (dist_from_center_x > 8 && dist_from_center_x < 24 &&
dist_from_center_y > 8 && dist_from_center_y < 24) {
my_direction = 4;
} else {
sint16 mod_x = *x & 0x1F;
sint16 mod_y = *y & 0x1F;
if (mod_x <= 16) {
if (mod_y < 16) {
my_direction = 2;
} else {
my_direction = 3;
}
} else {
if (mod_y < 16) {
my_direction = 0;
} else {
my_direction = 1;
}
}
}
if (direction != NULL) *direction = my_direction;
}
rct_xy16 screen_coord_to_viewport_coord(rct_viewport *viewport, uint16 x, uint16 y)

2
src/interface/viewport.h
View File

@@ -86,7 +86,7 @@ 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);
void screen_pos_to_map_pos(short *x, short *y, int *direction);
void show_gridlines();
void hide_gridlines();

2
src/windows/park.c
View File

@@ -812,7 +812,7 @@ static void window_park_entrance_toolupdate()
if (widgetIndex == WIDX_BUY_LAND_RIGHTS) {
map_invalidate_selection_rect();
RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) &= 0xFFFE;
screen_pos_to_map_pos(&x, &y);
screen_pos_to_map_pos(&x, &y, NULL);
if (x != SPRITE_LOCATION_NULL) {
RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) |= 1;
RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_TYPE, uint16) = 4;