koobas.hobune.stream
Why does setPixel persist after exit ??
Hello,
I wrote this code to change a part of texture with another texture
// the texture that i will paint with
public Texture2D targetTexture ;
//temporary texture
public Texture2D tmpTexture, tmpMainTexture;
void Start ()
{
//setting temp texture width and height
tmpMainTexture = (Texture2D)renderer.material.mainTexture;
tmpTexture = (Texture2D)renderer.material.mainTexture;
for (int y =30; y<tmpTexture.height; y++) {
for (int x = 30; x<tmpTexture.width; x++) {
//filling the temporary texture with the target texture
tmpTexture.SetPixel (x, y, targetTexture.GetPixel (x, y));
}
}
//Apply
tmpTexture.Apply ();
//change the object main texture
renderer.material.mainTexture = tmpTexture;
}
what i don't understand is that why the texture itself (in the project hierarchy)also get changed ? i checked out the PNG file and it is intact, also when i restart the project or change the texture type (from Advanced to Texture for example), the texture get back to it's original state, any help please ?
You should operate on an instance of the texture, rather than the actual texture in the project.
so ins$$anonymous$$d of renderer.material.mainTexture i use another texture ? if yes, how can i apply it to the object without using the main texture ?
this is what instance mean right ? cause the problem is not solved yet,
// the texture that i will paint with
public Texture2D targetTexture ;
//temporary texture
public Texture2D tmpTexture;
public Texture theTexture;
void Start ()
{
//setting temp texture width and height
theTexture = renderer.material.mainTexture;
tmpTexture = (Texture2D)theTexture;
for (int y =30; y<tmpTexture.height; y++) {
for (int x = 30; x<tmpTexture.width; x++) {
//filling the temporary texture with the target texture
tmpTexture.SetPixel (x, y, targetTexture.GetPixel (x, y));
}
}
//Apply
tmpTexture.Apply ();
//change the object main texture
theTexture = tmpTexture;
}
Okay i fixed it, but is this a good approach ? knowing that i will need to do this at runtime with every mouse click (looking for a painting effect)
void Start ()
{
//setting temp texture width and height
tmpTexture = new Texture2D (renderer.material.mainTexture.width, renderer.material.mainTexture.height);
//fill the new texture with the original one
for (int y =0; y<tmpTexture.height; y++) {
for (int x = 0; x<tmpTexture.width; x++) {
tmpTexture.SetPixel (x, y, originalTexture.GetPixel (x, y));
}
}
//Apply
tmpTexture.Apply ();
//filling the temporary texture with the target texturetheT
for (int y =30; y<tmpTexture.height; y++) {
for (int x = 30; x<tmpTexture.width; x++) {
tmpTexture.SetPixel (x, y, targetTexture.GetPixel (x, y));
}
}
//Apply
tmpTexture.Apply ();
//change the object main texture
renderer.material.mainTexture = tmpTexture;
}
You would only need to create the texture once. You can also just instantiate the texture like you do with other objects.
I had the same question just yesterday, take a look here:
http://answers.unity3d.com/questions/622444/setpixel-on-a-sprite-texture-without-changing-it-g.html
I supplied some code there, I don't know if it is the most elegant solution, but I created a new texture with the same height and width and just took all the pixels from the previous texture via setPixels32().
