Color not appearing on created mesh? (only grey)

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1

Hi,

The color on a dynamically created mesh does not show up, the mesh stays grey. The triangles appear well on the mesh, the Regenerate button works also, but still no color on the mesh. I put the texture in a “Textures” folder, or in “Resources”, I changed the vertices to get a 2*2 square, I changed the resolution of each tile, the logs appear well. Sometimes the mesh is black after “regenerate”, and saving the project makes it appear grey… I restarted Unity in case it was a bug, but it is still the same. The material for the mesh is Diffuse. Would you know how to debug this?

Here is the code if this can help:

the “Regenerate” button :

using UnityEditor;
using UnityEngine;
using System.Collections;

[CustomEditor(typeof(TileMapNe))]
public class TileMapInspector : Editor {
	
	public override void OnInspectorGUI() {
		//base.OnInspectorGUI();
		DrawDefaultInspector();
		
		if(GUILayout.Button("Regenerate")) {
			TileMapNe tileMap = (TileMapNe)target;
			tileMap.BuildMesh();
		}
	}
}

The code to create the mesh :

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
[RequireComponent(typeof(MeshFilter))]
[RequireComponent(typeof(MeshRenderer))]
[RequireComponent(typeof(MeshCollider))]
public class TileMapNe : MonoBehaviour {
	
	public int size_x = 2;
	public int size_z = 2;
	public float tileSize = 15.0f;
	
	public Texture2D terrainTiles;
	public int tileResolution;
	
	
	void Start () {
		BuildMesh();
	}
	
	void BuildTexture() {
		
		int texWidth = size_x * tileResolution;
		int texHeight = size_z * tileResolution;
		Texture2D texture = new Texture2D(texWidth, texHeight);
		
		for(int y=0; y < size_z; y++) {
			for(int x=0; x < size_x; x++) {
				Color p = new Color(1.0f, 0, 0);
				texture.SetPixel(x, y, p);
			}
		}
		
		texture.filterMode = FilterMode.Point;
		texture.wrapMode = TextureWrapMode.Clamp;
		texture.Apply();
		
		MeshRenderer mesh_renderer = GetComponent<MeshRenderer>();
		mesh_renderer.sharedMaterials[0].mainTexture = texture;
		
		Debug.Log ("Done Texture!");
	}
	
	public void BuildMesh() {
		int numTiles = size_x * size_z;
		int numTris = numTiles * 2;
		
		int vsize_x = size_x + 1;
		int vsize_z = size_z + 1;
		int numVerts = vsize_x * vsize_z;
		
		// Generate the mesh data
		Vector3[] vertices = new Vector3[ numVerts ];
		Vector3[] normals = new Vector3[numVerts];
		Vector2[] uv = new Vector2[numVerts];
		
		int[] triangles = new int[ numTris * 3 ];

		int x, z;
		for(z=0; z < vsize_z; z++) {
			for(x=0; x < vsize_x; x++) {
				vertices[ z * vsize_x + x ] = new Vector3( x*tileSize, 0, -z*tileSize );
				normals[ z * vsize_x + x ] = Vector3.up;
				uv[ z * vsize_x + x ] = new Vector2( (float)x / size_x, 1f - (float)z / size_z );
			}
		}
		Debug.Log ("Done Verts!");
		
		for(z=0; z < size_z; z++) {
			for(x=0; x < size_x; x++) {
				int squareIndex = z * size_x + x;
				int triOffset = squareIndex * 6;
				triangles[triOffset + 0] = z * vsize_x + x + 		   0;
				triangles[triOffset + 1] = z * vsize_x + x + vsize_x + 1;
				triangles[triOffset + 2] = z * vsize_x + x + vsize_x + 0;
				
				triangles[triOffset + 3] = z * vsize_x + x + 		   0;
				triangles[triOffset + 4] = z * vsize_x + x + 		   1;
				triangles[triOffset + 5] = z * vsize_x + x + vsize_x + 1;
			}
		}
		
		Debug.Log ("Done Triangles!");
		
		// Create a new Mesh and populate with the data
		Mesh mesh = new Mesh();
		mesh.vertices = vertices;
		mesh.triangles = triangles;
		mesh.normals = normals;
		mesh.uv = uv;
		
		// Assign our mesh to our filter/renderer/collider
		MeshFilter mesh_filter = GetComponent<MeshFilter>();
		MeshCollider mesh_collider = GetComponent<MeshCollider>();
		
		mesh_filter.mesh = mesh;
		mesh_collider.sharedMesh = mesh;
		Debug.Log ("Done Mesh!");
		
		BuildTexture();
	}
	
}

Thanks

2 Answers

2
2

try this

    void BuildTexture()
    {
        //Note1: tielResolution != 0
        int texWidth = size_x * (tileResolution<=0? 1 : tileResolution));
        int texHeight = size_z * (tileResolution<=0? 1 : tileResolution));
        Texture2D texture = new Texture2D(texWidth, texHeight);

        //Note2: SetPixs is more efficient than for(SetPix)
        Color[] color = new Color[texWidth * texHeight];
        for(int i=0;i<color.Length;i++)
        {
            color *= Color.red;*

}
texture.SetPixels(color);

texture.filterMode = FilterMode.Point;
texture.wrapMode = TextureWrapMode.Clamp;
texture.Apply();

MeshRenderer mesh_renderer = GetComponent();

//Note3: add material to mesh
mesh_renderer.sharedMaterial = new Material(Shader.Find(“Diffuse”));
mesh_renderer.sharedMaterial.mainTexture = texture;

Debug.Log(“Done Texture!”);
}

@Pauls That's a good news

 –
3

This is probably too late, but to fix the issue with that tutorial you just need to add the shader either through the editor or in code as sooncat suggested:

// Between the 2 lines, before trying to set the mainTexture of the material, you need to give the gameObject a material
MeshRenderer mesh_renderer = GetComponent<MeshRenderer>();
mesh_renderer.sharedMaterial = new Material(Shader.Find("Diffuse"));
mesh_renderer.sharedMaterials[0].mainTexture = texture;