Assigning a material
- Game Development course
- Intermediate
- Lesson 5/83
- 4 min
Learn to assign a material to a Mesh and about sub-meshes.
Assigning Materials to MeshRenderer
A Material determines how the surface of a 3D model appears (color, texture, glossiness). Through the material or materials property on the MeshRenderer component, materials can be accessed and modified dynamically in code.
MeshRenderer renderer = GetComponent<MeshRenderer>();
renderer.material.color = Color.red;Submeshes and Multiple Materials
Although complex 3D models appear as a single geometry, they are split into Submeshes so that different parts can use different materials. For example, a car's body uses metallic material while its windows use transparent material. In this case, the renderer.materials array holds a material for each submesh.
Material[] allMaterials = renderer.materials;
Debug.Log("Material count: " + allMaterials.Length);Practice Read Material Count
Assign renderer.materials.Length to the sayi variable. Then print it with Debug.Log("Malzeme: " + sayi);.
Starter code
using System;
public class Material
{
public string name;
public Material(string name) { this.name = name; }
}
public class MeshRenderer
{
public Material[] materials = new Material[] { new Material("Gövde"), new Material("Cam") };
}
public static class Debug
{
public static void Log(object message) => Console.WriteLine(message);
}
public class Program
{
public static void Main()
{
MeshRenderer renderer = new MeshRenderer();
// Atanmis malzeme sayisini alip konsola yazdir
}
}Sample solution
using System;
public class Material
{
public string name;
public Material(string name) { this.name = name; }
}
public class MeshRenderer
{
public Material[] materials = new Material[] { new Material("Gövde"), new Material("Cam") };
}
public static class Debug
{
public static void Log(object message) => Console.WriteLine(message);
}
public class Program
{
public static void Main()
{
MeshRenderer renderer = new MeshRenderer();
int sayi = renderer.materials.Length;
Debug.Log("Malzeme: " + sayi);
}
}Expected output
Malzeme: 2
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Which property path is used to change the color of an object's current material in code?
- renderer.material.color Correct answer
- meshFilter.color
- transform.material.color
- renderer.mesh.color
Explanation: To change material color, the color variable of the material property on MeshRenderer is accessed.
2 Multiple Materials Array
Material[] liste = renderer.____;Material[] liste = renderer.materials;Explanation: The array of all materials assigned to an object is accessed via the materials property.
3 Material Terminology
| Term | Meaning |
|---|---|
renderer.material |
The object's first or single material |
renderer.materials |
Array of all materials on the object |
Submesh |
Sub-geometry taking different materials |
material.color |
Base surface color of the material |