Adding a Texture at Runtime

This tutorial shows how to dynamically apply a texture to a 3D object in your Stride project. Using the Texture class, you'll load an image at runtime and assign it to a 3D entity (a cube).

What you'll learn

• Load a texture from an image file at runtime.
• Create and configure a MaterialDescriptor to apply the texture.
• Create a 3D primitive (cube) and assign the material.

Code walkthrough

using Stride.CommunityToolkit.Bepu;
using Stride.CommunityToolkit.Engine;
using Stride.CommunityToolkit.Rendering.ProceduralModels;
using Stride.Core.Mathematics;
using Stride.Engine;
using Stride.Graphics;
using Stride.Rendering;
using Stride.Rendering.Materials;
using Stride.Rendering.Materials.ComputeColors;

using var game = new Game();

game.Run(start: Start);

void Start(Scene scene)
{
    // Set up a base 3D scene with default lighting and camera
    game.SetupBase3DScene();

    // Load the texture from a file
    var texturePath = "Stride-logo.png";

    using var textureFile = File.Open(texturePath, FileMode.Open);

    var texture = Texture.Load(game.GraphicsDevice, textureFile);

    // Create a material descriptor and assign the loaded texture to it
    var materialDescriptor = new MaterialDescriptor
    {
        Attributes =
       new MaterialAttributes
       {
           Diffuse = new MaterialDiffuseMapFeature(new ComputeTextureColor(texture)),

           // Configures using the Lambert lighting model,
           // which simulates how light interacts with the surface
           DiffuseModel = new MaterialDiffuseLambertModelFeature(),

           // Specifies the back-face culling mode
           CullMode = CullMode.Back
       }
    };

    // Create a material instance from the descriptor
    var material = Material.New(game.GraphicsDevice, materialDescriptor);

    // Create a 3D cube primitive and assign the material to it
    var entity = game.Create3DPrimitive(PrimitiveModelType.Cube, new()
    {
        Material = material,
    });

    entity.Transform.Position = new Vector3(0, 8, 0);

    // Add the cube to the root scene
    entity.Scene = scene;
}

Running the code

When you run this code, you'll see a 3D cube with the specified texture applied. The cube is placed 8 units above the ground.

Summary

• Load a texture from an image file.
• Create a material that uses the texture.
• Apply the material to a 3D primitive and add it to the scene.

You can apply the same approach to other models and textures to change object appearance at runtime.