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CPUParticles2D - Add ability to follow physics interpolated target

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Allows a non-interpolated particle system to closely follow an interpolated target without tracking ahead of the target, by performing fixed timestep interpolation on the particle system global transform, and using this for emission.

Co-authored-by: lawnjelly <lawnjelly@gmail.com>
This commit is contained in:
Ricardo Buring
2025-01-22 13:24:55 +01:00
parent a7146ef807
commit 56fc0fd175
12 changed files with 157 additions and 34 deletions
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27
servers/rendering/renderer_canvas_cull.cpp
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@@ -70,6 +70,11 @@ void RendererCanvasCull::_dependency_deleted(const RID &p_dependency, Dependency
void RendererCanvasCull::_render_canvas_item_tree(RID p_to_render_target, Canvas::ChildItem *p_child_items, int p_child_item_count, const Transform2D &p_transform, const Rect2 &p_clip_rect, const Color &p_modulate, RendererCanvasRender::Light *p_lights, RendererCanvasRender::Light *p_directional_lights, RenderingServer::CanvasItemTextureFilter p_default_filter, RenderingServer::CanvasItemTextureRepeat p_default_repeat, bool p_snap_2d_vertices_to_pixel, uint32_t p_canvas_cull_mask, RenderingMethod::RenderInfo *r_render_info) {
RENDER_TIMESTAMP("Cull CanvasItem Tree");
// This is used to avoid passing the camera transform down the rendering
// function calls, as it won't be used in 99% of cases, because the camera
// transform is normally concatenated with the item global transform.
_current_camera_transform = p_transform;
memset(z_list, 0, z_range * sizeof(RendererCanvasRender::Item *));
memset(z_last_list, 0, z_range * sizeof(RendererCanvasRender::Item *));
@@ -242,14 +247,14 @@ void RendererCanvasCull::_attach_canvas_item_for_draw(RendererCanvasCull::Item *
}
if (((ci->commands != nullptr || ci->visibility_notifier) && p_clip_rect.intersects(p_global_rect, true)) || ci->vp_render || ci->copy_back_buffer) {
//something to draw?
// Something to draw?
if (ci->update_when_visible) {
RenderingServerDefault::redraw_request();
}
if (ci->commands != nullptr || ci->copy_back_buffer) {
ci->final_transform = p_transform;
ci->final_transform = !ci->use_identity_transform ? p_transform : _current_camera_transform;
ci->final_modulate = p_modulate * ci->self_modulate;
ci->global_rect_cache = p_global_rect;
ci->global_rect_cache.position -= p_clip_rect.position;
@@ -322,6 +327,10 @@ void RendererCanvasCull::_cull_canvas_item(Item *p_canvas_item, const Transform2
}
}
// Always calculate final transform as if not using identity xform.
// This is so the expected transform is passed to children.
// However, if use_identity_xform is set,
// we can override the transform for rendering purposes for this item only.
Transform2D self_xform;
Transform2D final_xform;
if (p_is_already_y_sorted) {
@@ -360,7 +369,12 @@ void RendererCanvasCull::_cull_canvas_item(Item *p_canvas_item, const Transform2
ci->repeat_source_item = repeat_source_item;
}
Rect2 global_rect = final_xform.xform(rect);
Rect2 global_rect;
if (!p_canvas_item->use_identity_transform) {
global_rect = final_xform.xform(rect);
} else {
global_rect = _current_camera_transform.xform(rect);
}
if (repeat_source_item && (repeat_size.x || repeat_size.y)) {
// Top-left repeated rect.
Rect2 corner_rect = global_rect;
@@ -686,6 +700,13 @@ void RendererCanvasCull::canvas_item_set_draw_behind_parent(RID p_item, bool p_e
canvas_item->behind = p_enable;
}
void RendererCanvasCull::canvas_item_set_use_identity_transform(RID p_item, bool p_enable) {
Item *canvas_item = canvas_item_owner.get_or_null(p_item);
ERR_FAIL_NULL(canvas_item);
canvas_item->use_identity_transform = p_enable;
}
void RendererCanvasCull::canvas_item_set_update_when_visible(RID p_item, bool p_update) {
Item *canvas_item = canvas_item_owner.get_or_null(p_item);
ERR_FAIL_NULL(canvas_item);