wgpu5/src/shaders/plane_shader.wgsl

// Vertex shader

struct CameraUniform {
    view_proj: mat4x4<f32>
}

@group(0) @binding(0)
var<uniform> camera: CameraUniform;

struct VertexInput {
    @location(0) position: vec3<f32>,
    @location(1) color: vec3<f32>,
    @location(2) uv: vec2<f32>,
};

struct VertexOutput {
    @builtin(position) clip_position: vec4<f32>,
    @location(0) color: vec3<f32>,
};

@group(1) @binding(0)
var t_diffuse: texture_2d<f32>;
@group(1) @binding(1)
var s_diffuse: sampler;

@group(2) @binding(0)
var h_diffuse: texture_2d<f32>;
@group(2) @binding(1)
var hs_diffuse: sampler;

@vertex
fn vs_main(
    model: VertexInput,
) -> VertexOutput {
    //let normalized_uv_coordinates = model.uv * vec2<f32>(textureDimensions(t_diffuse));
    let normalized_uv_coordinates = model.uv * vec2<f32>(textureDimensions(h_diffuse));

    //let height_added = textureLoad(t_diffuse,vec2<u32>(normalized_uv_coordinates),0);
    let height_added = textureLoad(h_diffuse,vec2<u32>(normalized_uv_coordinates),0);

    let grayscale_height_added = height_added.x;
    var out: VertexOutput;
    out.color = model.color;
    out.clip_position = camera.view_proj * vec4<f32>(model.position.x,model.position.y, model.position.z + ( grayscale_height_added), 1.0);
    return out;
}

// Fragment shader

@fragment
fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
    return vec4<f32>(0.0,0.0,1.0, 1.0);
}