gaming/godot
gaming/godot
1
0
Fork 0
mirror of https://github.com/godotengine/godot synced 2024-09-16 04:47:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix animated tile time-slice calculation accumulating float errors

Browse source
This commit is contained in:
kleonc 2023-09-26 12:07:29 +02:00
parent 7e67b496ff
commit 20d6a9b2e1
1 changed files with 8 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
scene/2d/tile_map.cpp
View file

@ -3146,15 +3146,19 @@ void TileMap::draw_tile(RID p_canvas_item, const Vector2 &p_position, const Ref<
} else {
real_t speed = atlas_source->get_tile_animation_speed(p_atlas_coords);
real_t animation_duration = atlas_source->get_tile_animation_total_duration(p_atlas_coords) / speed;
real_t time = 0.0;
// Accumulate durations unaffected by the speed to avoid accumulating floating point division errors.
// Aka do `sum(duration[i]) / speed` instead of `sum(duration[i] / speed)`.
real_t time_unscaled = 0.0;
for (int frame = 0; frame < atlas_source->get_tile_animation_frames_count(p_atlas_coords); frame++) {
real_t frame_duration = atlas_source->get_tile_animation_frame_duration(p_atlas_coords, frame) / speed;
RenderingServer::get_singleton()->canvas_item_add_animation_slice(p_canvas_item, animation_duration, time, time + frame_duration, p_animation_offset);
real_t frame_duration_unscaled = atlas_source->get_tile_animation_frame_duration(p_atlas_coords, frame);
real_t slice_start = time_unscaled / speed;
real_t slice_end = (time_unscaled + frame_duration_unscaled) / speed;
RenderingServer::get_singleton()->canvas_item_add_animation_slice(p_canvas_item, animation_duration, slice_start, slice_end, p_animation_offset);
Rect2i source_rect = atlas_source->get_runtime_tile_texture_region(p_atlas_coords, frame);
tex->draw_rect_region(p_canvas_item, dest_rect, source_rect, modulate, transpose, p_tile_set->is_uv_clipping());
time += frame_duration;
time_unscaled += frame_duration_unscaled;
}
RenderingServer::get_singleton()->canvas_item_add_animation_slice(p_canvas_item, 1.0, 0.0, 1.0, 0.0);
}