ShaderGraphCoder

// Create a solid red material for visionOS
func solidRed() async throws -> ShaderGraphMaterial {
    let color: SGColor = .color3f([1, 0, 0])
    let surface = pbrSurface(baseColor: color)
    return try await ShaderGraphMaterial(surface: surface)
}

// Create a pulsing blue material for visionOS
func pulsingBlue() async throws -> ShaderGraphMaterial {
    let frequency = SGValue.floatParameter(name: "Frequency", defaultValue: 2)
    let color: SGColor = .color3f([0, 0, 1]) * sin(SGValue.time * frequency * (2*Float.pi))
    let surface = pbrSurface(baseColor: color)
    return try await ShaderGraphMaterial(surface: surface)
}

// Create a texture mapped material for visionOS
func textureMap(textureLocalURL: URL) async throws -> ShaderGraphMaterial {
    // Create the surface by sampling the texture map
    let surface =
        SGValue
        .texture(contentsOf: textureLocalURL)
        .sampleColor3f(texcoord: SGValue.uv0)
        .pbrSurface()
    return try await ShaderGraphMaterial(surface: surface)
}

import SwiftUI
import ShaderGraphCoder

struct MyView: View {
    /// Create a blue surface shader
    let blueSurface = SGValue.color3f([0, 0, 1]).pbrSurface()
    var body: some View {
        // Preview the surface using ShaderGraphPreview
        ShaderGraphPreview(surface: blueSurface)
    }
}

#Preview {
    let blueSurface = SGValue.color3f([0, 0, 1]).pbrSurface()
    return ShaderGraphPreview(surface: blueSurface)
}