Struct RenderState 

pub struct RenderState {

    pub time: f32,
    pub frame: u32,
    pub progress: f32,
    pub audio: AudioLevels,
    pub motion: MotionParams,
    pub wave: WaveParams,
    pub decay: f32,
    pub gamma_adj: f32,
    pub echo_zoom: f32,
    pub echo_alpha: f32,
    pub echo_orient: u32,
    pub red_blue_stereo: bool,
    pub feedback: FeedbackParams,
    pub borders: BorderParams,
    pub motion_vectors: MotionVectorParams,
    pub q_snapshot: [f32; 32],
}

Render state containing dynamic parameters.

Fields

time: f32

Current time in seconds

frame: u32

Current frame number

progress: f32

MD2 progress — [0, 1] position within the current preset’s display window. 0.0 at preset load, ramps to 1.0 just before the next hard cut. Presets read it for once-per-display effects (slow fade-ins, build-ups before the next cut, intro flashes). Forwarded into the comp/warp uniforms.progress field each frame so user shaders see the canonical MD2 value.

audio: AudioLevels

Audio levels (bass, mid, treble)

motion: MotionParams

Motion parameters

wave: WaveParams

Wave parameters

decay: f32

Frame-buffer decay multiplier applied during the warp pass. Typical Milkdrop range: ~0.5 (very fast fade) to 1.0 (no fade).

gamma_adj: f32

Display-time brightness multiplier applied in the comp pass (f_gamma_adj in the MD2 spec). MilkDrop default is 2.0; not a true gamma exponent — a flat multiplier.

echo_zoom: f32

MilkDrop’s f_video_echo_zoom. Scales the UV around 0.5 before sampling the previous frame for the comp pass’s echo blend. 1.0 = same scale as current (passthrough sample).

echo_alpha: f32

MilkDrop’s f_video_echo_alpha. Mix weight between current frame (0.0) and echoed previous frame (1.0). Default 0.0 → echo off entirely.

echo_orient: u32

MilkDrop’s n_video_echo_orientation. 0 = no flip, 1 = flip X, 2 = flip Y, 3 = flip both.

red_blue_stereo: bool

MilkDrop’s b_red_blue_stereo. When true the comp pass produces an anaglyph red/cyan split — display-only, never enters the feedback loop. Typically set once at preset load, but per-frame eqs may flip it (mirrors darken_center semantics).

feedback: FeedbackParams

Feedback filter toggles (b_invert / b_brighten / etc.).

borders: BorderParams

Outer + inner border draws. The renderer trims the frame edges into two coloured rings; both contribute to the feedback loop so a high-decay preset trails them inward.

motion_vectors: MotionVectorParams

Motion-vector grid. A n_x × n_y grid of short line segments drawn into the warp output; over successive frames the feedback pulls them into trails that visualise the motion field.

q_snapshot: [f32; 32]

Snapshot of q1..q32 after the current frame’s per-frame phase. Forwarded to the comp pass so user comp shaders can read the same q-channel state per-frame equations wrote.

Trait Implementations

impl Clone for RenderState

fn clone(&self) -> RenderState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RenderState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RenderState

fn default() -> Self

Returns the “default value” for a type.

impl Copy for RenderState