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-rw-r--r--src/tree_cmd.cpp81
1 files changed, 35 insertions, 46 deletions
diff --git a/src/tree_cmd.cpp b/src/tree_cmd.cpp
index f9872c240..4a996dbba 100644
--- a/src/tree_cmd.cpp
+++ b/src/tree_cmd.cpp
@@ -435,10 +435,6 @@ struct TreeListEnt {
static void DrawTile_Trees(TileInfo *ti)
{
- const PalSpriteID *s;
- const TreePos* d;
- byte z;
-
switch (GetTreeGround(ti->tile)) {
case TREE_GROUND_SHORE: DrawShoreTile(ti->tileh); break;
case TREE_GROUND_GRASS: DrawClearLandTile(ti, GetTreeDensity(ti->tile)); break;
@@ -451,47 +447,39 @@ static void DrawTile_Trees(TileInfo *ti)
/* Do not draw trees when the invisible trees patch and transparency tree are set */
if (IsTransparencySet(TO_TREES) && _patches.invisible_trees) return;
- z = ti->z;
- if (ti->tileh != SLOPE_FLAT) {
- z += 4;
- if (IsSteepSlope(ti->tileh)) z += 4;
- }
+ uint16 tmp = ti->x;
- {
- uint16 tmp = ti->x;
- uint index;
+ tmp = ROR(tmp, 2);
+ tmp -= ti->y;
+ tmp = ROR(tmp, 3);
+ tmp -= ti->x;
+ tmp = ROR(tmp, 1);
+ tmp += ti->y;
- tmp = ROR(tmp, 2);
- tmp -= ti->y;
- tmp = ROR(tmp, 3);
- tmp -= ti->x;
- tmp = ROR(tmp, 1);
- tmp += ti->y;
+ uint index = GB(tmp, 6, 2) + (GetTreeType(ti->tile) << 2);
- d = _tree_layout_xy[GB(tmp, 4, 2)];
+ /* different tree styles above one of the grounds */
+ if (GetTreeGround(ti->tile) == TREE_GROUND_SNOW_DESERT &&
+ GetTreeDensity(ti->tile) >= 2 &&
+ IsInsideMM(index, TREE_SUB_ARCTIC << 2, TREE_RAINFOREST << 2)) {
+ index += 164 - (TREE_SUB_ARCTIC << 2);
+ }
- index = GB(tmp, 6, 2) + (GetTreeType(ti->tile) << 2);
+ assert(index < lengthof(_tree_layout_sprite));
- /* different tree styles above one of the grounds */
- if (GetTreeGround(ti->tile) == TREE_GROUND_SNOW_DESERT &&
- GetTreeDensity(ti->tile) >= 2 &&
- IsInsideMM(index, TREE_SUB_ARCTIC << 2, TREE_RAINFOREST << 2)) {
- index += 164 - (TREE_SUB_ARCTIC << 2);
- }
-
- assert(index < lengthof(_tree_layout_sprite));
- s = _tree_layout_sprite[index];
- }
+ const PalSpriteID *s = _tree_layout_sprite[index];
+ const TreePos *d = _tree_layout_xy[GB(tmp, 4, 2)];
+ /* combine trees into one sprite object */
StartSpriteCombine();
TreeListEnt te[4];
- uint i;
/* put the trees to draw in a list */
- i = GetTreeCount(ti->tile) + 1;
- do {
- SpriteID image = s[0].sprite + (--i == 0 ? GetTreeGrowth(ti->tile) : 3);
+ uint trees = GetTreeCount(ti->tile) + 1;
+
+ for (uint i = 0; i < trees; i++) {
+ SpriteID image = s[0].sprite + (i == trees - 1 ? GetTreeGrowth(ti->tile) : 3);
SpriteID pal = s[0].pal;
te[i].image = image;
@@ -500,25 +488,26 @@ static void DrawTile_Trees(TileInfo *ti)
te[i].y = d->y;
s++;
d++;
- } while (i);
+ }
/* draw them in a sorted way */
- for (;;) {
- byte min = 0xFF;
- TreeListEnt *tep = NULL;
+ byte z = ti->z + GetSlopeMaxZ(ti->tileh) / 2;
- i = GetTreeCount(ti->tile) + 1;
- do {
- if (te[--i].image != 0 && te[i].x + te[i].y < min) {
+ for (; trees > 0; trees--) {
+ uint min = te[0].x + te[0].y;
+ uint mi = 0;
+
+ for (uint i = 1; i < trees; i++) {
+ if (te[i].x + te[i].y < min) {
min = te[i].x + te[i].y;
- tep = &te[i];
+ mi = i;
}
- } while (i);
+ }
- if (tep == NULL) break;
+ AddSortableSpriteToDraw(te[mi].image, te[mi].pal, ti->x + te[mi].x, ti->y + te[mi].y, 16 - te[mi].x, 16 - te[mi].y, 0x30, z, IsTransparencySet(TO_TREES), -te[mi].x, -te[mi].y);
- AddSortableSpriteToDraw(tep->image, tep->pal, ti->x + tep->x, ti->y + tep->y, 16 - tep->x, 16 - tep->y, 0x30, z, IsTransparencySet(TO_TREES), -tep->x, -tep->y);
- tep->image = 0;
+ /* replace the removed one with the last one */
+ te[mi] = te[trees - 1];
}
EndSpriteCombine();