/// Shader used for drawing solid color fills.

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

@vertex
fn main_vertex(in: VertexInput) -> VertexOutput {
    let pos = globals.view_matrix * transforms.world_matrix * vec4<f32>(in.position.x, in.position.y, 0.0, 1.0);
    let color = in.color * transforms.mult_color + transforms.add_color;
    let alpha = clamp(color.a, 0.0, 1.0);
    return VertexOutput(pos, vec4<f32>(color.rgb * alpha, alpha));
}

@fragment
fn main_fragment(in: VertexOutput) -> @location(0) vec4<f32> {
    return in.color;
}