void Update()
{
if (texture == null)
{
texture = GrassManipulationUtility.GetGrassTexture(transform, false);
}
Color[] pixels = texture.GetPixels();
for (int i = 0; i < pixels.Length; i++)
{
pixels[i] = Color.Lerp(pixels[i], originalColor, regenerationSpeed * Time.deltaTime);
}
texture.SetPixels(pixels);
//Search for texture updater, which prevents multiply applys per frame (for multiple displacers)
TextureUpdater updater = GetComponent <TextureUpdater>();
if (updater == null)
{
updater = gameObject.AddComponent <TextureUpdater>();
updater.targetTexture = texture;
}
updater.RequestTextureUpdate();
}
public void ApplyBrush(Vector3 hitPoint)
{
RaycastHit hit;
Vector2 texForward, texRight;
if (!GrassManipulationUtility.GetWorldToTextureSpaceMatrix(new Ray(hitPoint + Vector3.up * 1000, Vector3.down),
EPSILON, GrassCollider, out hit, out texForward, out texRight))
{
return;
}
Vector2 texCoord = hit.textureCoord;
//Convert the world space radius to a pixel radius in texture space. This requires square textures.
int pixelRadius = (int)(Size * texForward.magnitude * Texture.width);
//Calculate the pixel coordinates of the point where the raycast hit the texture.
Vector2 mid = new Vector2(texCoord.x * Texture.width, texCoord.y * Texture.height);
//Calculate the pixel area where the texture will be changed
int targetStartX = (int)(mid.x - pixelRadius);
int targetStartY = (int)(mid.y - pixelRadius);
int startX = Mathf.Clamp(targetStartX, 0, Texture.width);
int startY = Mathf.Clamp(targetStartY, 0, Texture.height);
int width = Mathf.Min(targetStartX + pixelRadius * 2, Texture.width) - targetStartX;
int height = Mathf.Min(targetStartY + pixelRadius * 2, Texture.height) - targetStartY;
mid -= new Vector2(startX, startY);
//Get pixels
Color[] pixels = Texture.GetPixels(startX, startY, width, height);
//Iterate trough all pixels
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int index = y * width + x;
Vector2 uv = ((new Vector2(x, y) - mid) / pixelRadius) * 0.5f + new Vector2(0.5f, 0.5f);
pixels[index] = ApplyBrushToPixel(pixels[index], uv);
}
}
//Save pixels and apply them to the texture
Texture.SetPixels(startX, startY, width, height, pixels);
Texture.Apply();
}