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Decompiled sub_68A15E

This commit is contained in:
Timmy Weerwag 2015-04-04 15:15:24 +02:00
parent 5f55bd97be
commit a78b37e96e
1 changed files with 64 additions and 9 deletions
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73
src/windows/track_place.c
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@ -304,14 +304,69 @@ static void window_track_place_draw_mini_preview()
*
* rct2: 0x0068A15E
*/
static void sub_68A15E(int x, int y, short *ax, short *bx)
static void sub_68A15E(int screenX, int screenY, int *x, int *y, int *direction, rct_map_element **mapElement)
{
int eax, ebx, ecx, edx, esi, edi, ebp;
eax = x;
ebx = y;
RCT2_CALLFUNC_X(0x0068A15E, &eax, &ebx, &ecx, &edx, &esi, &edi, &ebp);
*ax = *((short*)&eax);
*bx = *((short*)&ebx);
int z;
rct_map_element *myMapElement;
rct_viewport *viewport;
get_map_coordinates_from_pos(screenX, screenY, 0xFFF6, x, y, &z, &myMapElement, &viewport);
if (z == 0) {
*x = 0x8000;
return;
}
RCT2_GLOBAL(0x00F1AD3E, uint8) = z;
RCT2_GLOBAL(0x00F1AD30, rct_map_element*) = myMapElement;
if (z == 4) {
// myMapElement appears to be water
z = myMapElement->properties.surface.terrain;
z = (z & MAP_ELEMENT_WATER_HEIGHT_MASK) << 4;
}
RCT2_GLOBAL(0x00F1AD3C, uint16) = z;
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(viewport, screenX, screenY);
rct_xy16 map_pos = { *x + 16, *y + 16 };
for (int i = 0; i < 5; i++) {
if (RCT2_GLOBAL(0x00F1AD3E, uint8) != 4) {
z = map_element_height(map_pos.x, map_pos.y);
} else {
z = RCT2_GLOBAL(0x00F1AD3C, uint16);
}
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));
}
// Determine to which edge the cursor is closest
int myDirection;
int mod_x = map_pos.x & 0x1F;
int mod_y = map_pos.y & 0x1F;
if (mod_x < mod_y) {
if (mod_x + mod_y < 32) {
myDirection = 0;
} else {
myDirection = 1;
}
} else {
if (mod_x + mod_y < 32) {
myDirection = 3;
} else {
myDirection = 2;
}
}
*x = map_pos.x & ~0x1F;
*y = map_pos.y & ~0x1F;
if (direction != NULL) *direction = myDirection;
if (mapElement != NULL) *mapElement = myMapElement;
}
/**
@ -483,7 +538,7 @@ static void window_track_place_toolupdate()
RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) &= ~7;
// Get the tool map position
sub_68A15E(x, y, &x, &y);
sub_68A15E(x, y, &x, &y, NULL, NULL);
if (x == (short)0x8000) {
window_track_place_clear_provisional();
return;
@ -545,7 +600,7 @@ static void window_track_place_tooldown()
map_invalidate_map_selection_tiles();
RCT2_GLOBAL(RCT2_ADDRESS_MAP_SELECTION_FLAGS, uint16) &= ~7;
sub_68A15E(x, y, &x, &y);
sub_68A15E(x, y, &x, &y, NULL, NULL);
if (x == (short)0x8000)
return;