public void scroll(float xAmount, float yAmount) {
if (xAmount != 0) {
float width = (widthRatio - xOff) * texture.width();
xOff = (xOff + xAmount) % 1;
widthRatio = xOff + width / texture.width();
}
if (yAmount != 0) {
float height = (heightRatio - yOff) * texture.height();
yOff = (yOff + yAmount) % 1;
heightRatio = yOff + height / texture.height();
}
}
public void setRegion(int x, int y, int width, int height) {
float invTexWidth = 1f;
float invTexHeight = 1f;
if (texture.isScale()) {
invTexWidth = (1f / texture.width());
invTexHeight = (1f / texture.height());
} else {
invTexWidth = (1f / texture.width()) * texture.widthRatio;
invTexHeight = (1f / texture.height()) * texture.heightRatio;
}
setRegion(
x * invTexWidth + texture.xOff,
y * invTexHeight + texture.yOff,
(x + width) * invTexWidth,
(y + height) * invTexHeight);
}
public LTextureRegion(LTexture texture) {
if (texture == null) {
throw new IllegalArgumentException("texture cannot be null.");
}
this.texture = texture;
setRegion(0, 0, texture.width(), texture.height());
}
public Picture(LTexture image, int x, int y) {
if (image != null) {
this.setImage(image);
this.width = (int) image.width();
this.height = (int) image.height();
}
this.setLocation(x, y);
this.visible = true;
}
public void setImage(LTexture image) {
this.image = image;
this.width = (int) image.width();
this.height = (int) image.height();
}
public void setImage(String fileName) {
this.image = LTextures.loadTexture(fileName);
this.width = (int) image.width();
this.height = (int) image.height();
}
public void setRegion(LTexture texture) {
this.texture = texture;
setRegion(0, 0, texture.width(), texture.height());
}
public int getRegionHeight() {
float result = texture.height() * heightRatio - texture.height() * yOff;
return (int) (result > 0 ? result : -result);
}
public int getRegionY() {
return (int) (yOff * texture.height());
}
