Struct MotionBlurNode 

pub struct MotionBlurNode {
    pub sub_frames: u8,
    /* private fields */
}

GPU-native motion blur via exponential-decay accumulation.

Each frame the node blends the current frame with a persistent accumulation of the previous output: out = mix(current, prev, prev_weight), then keeps out as the next frame’s prev. prev_weight grows with shutter_angle (0 = no blur, 180 = standard film blur) and sub_frames (2–8; more = more persistence, i.e. a smoother/longer trail). The node is stateful: the trail builds up only across successive process / process_cpu calls on the same node instance (a fresh node per frame never accumulates).

Fields

sub_frames: u8

Accumulated sub-frame count (clamped to 2..=8); higher = smoother trail.

Implementations

impl MotionBlurNode

pub fn new(shutter_angle: f32, sub_frames: u8) -> Self

Creates a motion-blur node.

pub fn shutter_angle(&self) -> f32

The shutter angle currently in effect, in degrees.

Trait Implementations

impl RenderNode for MotionBlurNode

Available on crate feature wgpu only.

fn set_param(&self, param: NodeParam) -> bool

Takes NodeParam::MotionBlurShutter, so an animated shutter reaches the live node and the accumulated trail survives the change.

fn process( &self, inputs: &[&Texture], outputs: &[&Texture], ctx: &RenderContext, )

Run the GPU render pass.

fn input_count(&self) -> usize

Number of input textures required by this node (default: 1).

fn pass_count(&self) -> usize

Number of render passes (default: 1). Multi-pass nodes (e.g. gaussian blur) return 2 or more.

fn output_dimensions(&self, in_w: u32, in_h: u32) -> (u32, u32)

Output dimensions this node produces given its input dimensions.

impl RenderNodeCpu for MotionBlurNode

fn process_cpu(&self, rgba: &mut [u8], w: u32, h: u32)

Process rgba in-place.