Sprite To Uv Mesh

Unity Engine
1

Hi i try apply new uv based on RaycastHit hit;

for set sprite Information and apply new UV to the quad selection

for i need 3 think’s

  1. sprite position how return it
  2. quad face selection i see Meshtopology.quads but i have no acces to it
    Mesh mesh = meshCollider.sharedMesh;
    MeshTopology topo = mesh.GetTopology(0);
  3. apply uv

know if it’s possible it’s can be already good answer

2

Yes sorry my trouble is maybie hard to understand and my explain can be better
anybody can help please just give the way where’s i can oriented my search thank’s
:slight_smile:

3

so i found

rect rec = sprite.textureRect;

result this debug

rec(x:43.00, y:317.00, width:181.00, height:132.00)

with that’s i need complete this list

float Top_Left_min = 0;
float Top_Left_max = 0;
float Top_Right_min = 0;
float Top_Right_max = 0;
float bottom_Left_min = 0;
float bottom_Left_max = 0;
float bottom_Right_min = 0;
float bottom_Right_max = 0;

the biggest trouble is for uv we need quad
and for this time only triangles is enable

4

ok i have make the start now take pause
see later if i have time to back on it
so have somethink’s like this

float Top_Left_min = rec.x/atlas.width;
float Top_Left_max = rec.x /atlas.width+rec.width /atlas.width;
float Top_Right_min = rec.width /atlas.width;
float Top_Right_max = 1;
float bottom_Left_min = rec.y /atlas.height;
float bottom_Left_max = rec.y /atlas.height+rec.height /atlas.height;
float bottom_Right_min = 1;
float bottom_Right_max = 1;

Vector2[ ] theUVs = new Vector2[mesh.uv.Length];
theUVs = mesh.uv;
theUVs[4] = new Vector2(Top_Left_min, Top_Left_max );
theUVs[5] = new Vector2( Top_Right_min, Top_Right_max);
theUVs[8] = new Vector2( bottom_Left_min,bottom_Left_max );
theUVs[9] = new Vector2(bottom_Right_min, bottom_Right_max );
Debug.Log (“4UV”+theUVs[4]);
Debug.Log (“5UV”+theUVs[5]);
Debug.Log (“8UV”+theUVs[8]);
Debug.Log (“9UV”+theUVs[9]);
mesh.uv = theUVs;

close to goal now we can assign sprite to mesh

5

i found this post
http://forum.unity3d.com/threads/highlight-cube-face.36665/
talking about how use normal to get quad face

i continue to try apply sprite to mesh

6

anyone can help please

7

i looking other tool on asset store and no one do it

i found this What is the simple way of applying Texture Atlas to Unity - Questions & Answers - Unity Discussions
get interessing talking information