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package ch.asynk.tankontank.screens;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Rectangle;
public class MenuCamera extends OrthographicCamera
{
private static final float ZEROF = 0.01f;
private float virtualAspect;
private final Rectangle virtual;
private final Rectangle window;
private Matrix4 uiMatrix;
private Matrix4 uiInvProjMatrix;
public MenuCamera(int cx, int cy, int width, int height)
{
super(width, height);
this.virtual = new Rectangle();
this.virtual.set(cx, cy, width, height);
this.virtualAspect = (virtual.width / virtual.height);
this.window = new Rectangle();
this.window.set(0, 0, 0, 0);
this.position.set(virtual.x, virtual.y, 0f);
this.uiMatrix = new Matrix4();
this.uiInvProjMatrix = new Matrix4();
}
public void updateViewport(int screenWidth, int screenHeight)
{
float aspect = (screenWidth / (float) screenHeight);
float diff = (virtualAspect - aspect);
if (diff < -ZEROF) {
viewportWidth = (virtual.height * aspect);
viewportHeight = virtual.height;
} else if (diff > ZEROF) {
viewportWidth = virtual.width;
viewportHeight = (virtual.width / aspect);
}
window.width= screenWidth;
window.height= screenHeight;
Gdx.gl.glViewport((int)window.x, (int)window.y, (int)window.width, (int)window.height);
update(true);
uiMatrix.set(combined);
uiMatrix.setToOrtho2D(0, 0, screenWidth, screenHeight);
uiInvProjMatrix.set(uiMatrix);
Matrix4.inv(uiInvProjMatrix.val);
}
public float getScreenWidth()
{
return window.width;
}
public float getScreenHeight()
{
return window.height;
}
public void uiUnproject(float x, float y, Vector3 v)
{
x = x - window.x;
y = Gdx.graphics.getHeight() - y - 1;
y = y - window.y;
v.x = (2 * x) / window.width - 1;
v.y = (2 * y) / window.height - 1;
v.z = 2 * v.z - 1;
v.prj(uiInvProjMatrix);
}
public Matrix4 uiCombined()
{
return uiMatrix;
}
}
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