rustial-renderer-wgpu 1.0.0

Pure WGPU renderer for the rustial 2.5D map engine
Documentation 
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//! Vertex types for instanced column rendering.

use bytemuck::{Pod, Zeroable};

/// Shared unit-box vertex for instanced column rendering.
#[repr(C)]
#[derive(Debug, Clone, Copy, Pod, Zeroable)]
pub struct ColumnVertex {
    /// Unit-box local position.
    pub position: [f32; 3],
    /// Unit-box local normal.
    pub normal: [f32; 3],
}

impl ColumnVertex {
    /// Vertex layout for the shared unit-box mesh.
    pub fn layout() -> wgpu::VertexBufferLayout<'static> {
        wgpu::VertexBufferLayout {
            array_stride: std::mem::size_of::<ColumnVertex>() as wgpu::BufferAddress,
            step_mode: wgpu::VertexStepMode::Vertex,
            attributes: &[
                wgpu::VertexAttribute {
                    offset: 0,
                    shader_location: 0,
                    format: wgpu::VertexFormat::Float32x3,
                },
                wgpu::VertexAttribute {
                    offset: std::mem::size_of::<[f32; 3]>() as wgpu::BufferAddress,
                    shader_location: 1,
                    format: wgpu::VertexFormat::Float32x3,
                },
            ],
        }
    }
}

/// Per-instance column transform/color data.
#[repr(C)]
#[derive(Debug, Clone, Copy, PartialEq, Pod, Zeroable)]
pub struct ColumnInstanceData {
    /// Column base-center position in camera-relative meters.
    pub base_position: [f32; 3],
    /// Width, height, and reserved padding.
    pub dimensions: [f32; 4],
    /// Per-instance RGBA color.
    pub color: [f32; 4],
}

impl ColumnInstanceData {
    /// Vertex layout for per-instance column data.
    pub fn layout() -> wgpu::VertexBufferLayout<'static> {
        wgpu::VertexBufferLayout {
            array_stride: std::mem::size_of::<ColumnInstanceData>() as wgpu::BufferAddress,
            step_mode: wgpu::VertexStepMode::Instance,
            attributes: &[
                wgpu::VertexAttribute {
                    offset: 0,
                    shader_location: 2,
                    format: wgpu::VertexFormat::Float32x3,
                },
                wgpu::VertexAttribute {
                    offset: std::mem::size_of::<[f32; 3]>() as wgpu::BufferAddress,
                    shader_location: 3,
                    format: wgpu::VertexFormat::Float32x4,
                },
                wgpu::VertexAttribute {
                    offset: (std::mem::size_of::<[f32; 3]>()
                        + std::mem::size_of::<[f32; 4]>()) as wgpu::BufferAddress,
                    shader_location: 4,
                    format: wgpu::VertexFormat::Float32x4,
                },
            ],
        }
    }
}