Daicon

Daicon is the root node of the scene responsible for shaders.

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Parameters:

- shader_trigger_nodes

Array[Node]

List of trigger nodes using ShaderCast or other shader design mechanisms on target nodes.

Note

Trigger node must necessarily contain ShaderCast or other shader design mechanism. Otherwise there will be an error.

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- shader_target_nodes

Array[Node]

List of target nodes. Draws the shader using the passed position information from the trigger nodes.

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- PositionArray

Array[Vector2]

Dynamically updated list of positions of all shaders on the screen.

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Methods:

- _physics_process

func _physics_process(delta: float) -> void:
(1) shader_target_nodes.sort_custom(func(a, b): return a.z_index < b.z_index)
    for shader_target in shader_target_nodes:
    (2) PositionArray.clear()
    (3) shader_trigger_nodes.sort_custom(func(a, b): return a.z_index < b.z_index)
        for shader_trigger in shader_trigger_nodes:
        (4) if shader_trigger.shader_cast.is_colliding() and shader_target.z_index >= shader_trigger.z_index:
            (5) PositionArray.append(get_viewport().get_final_transform() * shader_trigger.get_global_transform_with_canvas() * Vector2(0,0))
    (6) shader_target.material.set_shader_parameter("CircleCentres", PositionArray)
        shader_target.material.set_shader_parameter("NumCircleCentres", PositionArray.size())

1. Sorting the list of target nodes by z-index.
2. clearing the list of items.
3. Sorting the list of triggers by z-index
4. Checking: whether ShaderCast is active and if the z-index of the target is higher behind the z-index of the trigger
5. Put the coordinates of the trigger into the list of positions
6. Enter the coordinates into the shader parameter

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- _ready

func _ready() -> void:
    self.set_y_sort_enabled(true)

The set_y_sort_enabled parameter is always true.