hiraku-engine 0.1.0

Hiraku visual-novel engine
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use bevy::{
    asset::Handle,
    pbr::Material,
    prelude::*,
    reflect::TypePath,
    render::render_resource::{AsBindGroup, ShaderType},
    shader::ShaderRef,
};

pub fn load_internal_shaders(app: &mut App) {
    bevy::asset::embedded_asset!(app, "shaders/rule_transition_2d.wgsl");
}

#[derive(Resource, Clone)]
pub struct RuleTransitionMesh(pub Handle<Mesh>);

#[derive(Asset, TypePath, AsBindGroup, Debug, Clone)]
#[uniform(0, RuleTransitionUniform)]
pub struct RuleTransitionMaterial {
    #[texture(1)]
    #[sampler(2)]
    pub from_texture: Handle<Image>,
    #[texture(3)]
    #[sampler(4)]
    pub to_texture: Handle<Image>,
    #[texture(5)]
    #[sampler(6)]
    pub rule_texture: Handle<Image>,
    pub progress: f32,
    pub vague: f32,
}

#[derive(Clone, Debug, ShaderType)]
pub struct RuleTransitionUniform {
    pub progress: f32,
    pub vague: f32,
    pub _padding: Vec2,
}

impl From<&RuleTransitionMaterial> for RuleTransitionUniform {
    fn from(material: &RuleTransitionMaterial) -> Self {
        Self {
            progress: material.progress,
            vague: material.vague,
            _padding: Vec2::ZERO,
        }
    }
}

impl Material for RuleTransitionMaterial {
    fn fragment_shader() -> ShaderRef {
        "embedded://hiraku_engine/effect/shaders/rule_transition_2d.wgsl".into()
    }

    fn alpha_mode(&self) -> AlphaMode {
        AlphaMode::Blend
    }

    fn enable_shadows() -> bool {
        false
    }
}

#[derive(Component)]
pub struct RuleTransitionPlayer {
    pub material: Handle<RuleTransitionMaterial>,
    pub target_path: String,
    pub target_image: Handle<Image>,
    pub previous_background: Entity,
    pub timer: Timer,
    pub animation_id: Option<String>,
}