gizmo-renderer 0.1.7

A custom ECS and physics engine aimed for realistic simulations.
Documentation 
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#[repr(C)]
#[derive(Copy, Clone, Debug, bytemuck::Pod, bytemuck::Zeroable)]
pub struct GpuParticle {
    pub position: [f32; 3],
    pub life: f32,
    pub velocity: [f32; 3],
    pub max_life: f32,
    pub color: [f32; 4],
    pub size_start: f32,
    pub size_end: f32,
    pub _padding: [f32; 2],
}

impl GpuParticle {
    pub fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
        wgpu::VertexBufferLayout {
            array_stride: std::mem::size_of::<GpuParticle>() as wgpu::BufferAddress,
            step_mode: wgpu::VertexStepMode::Instance,
            attributes: &[
                wgpu::VertexAttribute {
                    offset: 0,
                    shader_location: 0,
                    format: wgpu::VertexFormat::Float32x4,
                }, // pos + life
                wgpu::VertexAttribute {
                    offset: 16,
                    shader_location: 1,
                    format: wgpu::VertexFormat::Float32x4,
                }, // vel + max_life
                wgpu::VertexAttribute {
                    offset: 32,
                    shader_location: 2,
                    format: wgpu::VertexFormat::Float32x4,
                }, // color
                wgpu::VertexAttribute {
                    offset: 48,
                    shader_location: 3,
                    format: wgpu::VertexFormat::Float32x4,
                }, // sizes + padding
            ],
        }
    }
}

#[repr(C)]
#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
pub struct ParticleSimParams {
    pub dt: f32,
    pub global_gravity: f32,
    pub global_drag: f32,
    pub _padding: f32,
}