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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.Rectangle;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.math.MathUtils;
public class GameCamera extends OrthographicCamera
{
private static final float ZEROF = 0.01f;
private int screenWidth;
private int screenHeight;
private float zoomOut;
private float zoomIn;
private float viewportAspect;
private float widthFactor;
private float heightFactor;
private Rectangle virtual;
private Rectangle window;
private Matrix4 hudMatrix;
private Matrix4 hudInvProjMatrix;
public GameCamera(float virtualWidth, float virtualHeight, float zoomOut, float zoomIn)
{
super(virtualWidth, virtualHeight);
this.zoomOut = zoomOut;
this.zoomIn = zoomIn;
this.viewportAspect = (viewportWidth / viewportHeight);
this.virtual = new Rectangle();
this.virtual.set(0, 0, virtualWidth, virtualHeight);
this.window = new Rectangle();
this.hudMatrix = new Matrix4();
this.hudInvProjMatrix = new Matrix4();
}
public void updateViewport(int screenWidth, int screenHeight)
{
this.screenWidth = screenWidth;
this.screenHeight = screenHeight;
float aspect = (screenWidth / (float) screenHeight);
float diff = (viewportAspect - aspect);
if (diff < -ZEROF) {
window.width = java.lang.Math.min((screenHeight * viewportAspect / zoom), screenWidth);
window.height = screenHeight;
window.x = ((screenWidth - window.width) / 2f);
window.y = 0f;
viewportWidth = (viewportHeight * (window.width / window.height));
} else if (diff > ZEROF) {
window.width = screenWidth;
window.height = java.lang.Math.min((screenWidth * viewportAspect / zoom), screenHeight);
window.x = 0f;
window.y = ((screenHeight - window.height) / 2f);
viewportHeight = (viewportWidth * (window.height / window.width));
}
Gdx.gl.glViewport((int)window.x, (int)window.y, (int)window.width, (int)window.height);
this.widthFactor = (viewportWidth / screenWidth);
this.heightFactor = (viewportHeight / screenHeight);
clampPosition();
update(true);
hudMatrix.set(combined);
hudMatrix.setToOrtho2D(0, 0, window.width, window.height);
hudInvProjMatrix.set(hudMatrix);
Matrix4.inv(hudInvProjMatrix.val);
}
public Matrix4 getHudMatrix()
{
return hudMatrix;
}
public int getScreenWidth()
{
return screenWidth;
}
public int getScreenHeight()
{
return screenHeight;
}
public int getHudWidth()
{
return (int) window.width;
}
public int getHudHeight()
{
return (int) window.height;
}
public void centerOnWorld()
{
position.set((viewportWidth / 2f), (viewportHeight / 2f), 0f);
}
public void zoom(float dz)
{
zoom += dz;
clampZoom();
updateViewport(screenWidth, screenHeight);
}
public void translate(float dx, float dy)
{
float deltaX = (dx * zoom * widthFactor);
float deltaY = (dy * zoom * heightFactor);
translate(deltaX, -deltaY, 0);
clampPosition();
update(true);
}
public void clampZoom()
{
zoom = MathUtils.clamp(zoom, zoomIn, zoomOut);
}
public void clampPosition()
{
float cx = (viewportWidth * zoom);
float cy = (viewportHeight * zoom);
if ((virtual.width - cx) > ZEROF) {
cx /= 2f;
position.x = MathUtils.clamp(position.x, cx, (virtual.width - cx));
} else
position.x = (virtual.width / 2f);
if ((virtual.height - cy) > ZEROF) {
cy /= 2f;
position.y = MathUtils.clamp(position.y, cy, (virtual.height - cy));
} else
position.y = (virtual.height / 2f);
}
public void debug()
{
System.err.println(String.format(" VIEWPORT: %dx%d * %.2f -> %dx%d", (int)viewportWidth, (int)viewportHeight,
zoom, (int)(viewportWidth * zoom), (int)(viewportHeight * zoom)));
System.err.println(String.format(" WINDOW: %d;%d %dx%d", (int)window.x, (int)window.y, (int)window.width, (int)window.height));
System.err.println("MATRIX:" + combined.toString());
}
public void unproject(int x, int y, Vector3 v)
{
unproject(v.set(x, y, 0), window.x, window.y, window.width, window.height);
}
public void unprojectHud(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(hudInvProjMatrix);
}
}
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