welcome RustAndDust

1 files changed, 112 insertions, 0 deletions

diff --git a/core/src/ch/asynk/rustanddust/screens/MenuCamera.java b/core/src/ch/asynk/rustanddust/screens/MenuCamera.java
new file mode 100644
index 0000000..be8341a
--- /dev/null
+++ b/core/src/ch/asynk/rustanddust/screens/MenuCamera.java
@@ -0,0 +1,112 @@
+package ch.asynk.rustanddust.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 int hudLeft;
+    private int hudBottom;
+    private int hudCorrection;
+
+    private Matrix4 uiMatrix;
+    private Matrix4 uiInvProjMatrix;
+
+    public MenuCamera(int cx, int cy, int width, int height, int hudCorrection)
+    {
+        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.hudLeft = 0;
+        this.hudBottom = 0;
+        this.hudCorrection = hudCorrection;
+
+        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;
+        hudLeft = hudCorrection;
+        hudBottom = (int) (hudLeft / aspect);
+
+        Gdx.gl.glViewport((int)window.x, (int)window.y, (int)window.width, (int)window.height);
+
+        update(true);
+
+        uiMatrix.setToOrtho2D(getHudLeft(), getHudBottom(), getHudWidth(), getHudHeight());
+        uiInvProjMatrix.set(uiMatrix);
+        Matrix4.inv(uiInvProjMatrix.val);
+    }
+
+    public float getScreenWidth()
+    {
+        return window.width;
+    }
+
+    public float getScreenHeight()
+    {
+        return window.height;
+    }
+
+    public int getHudLeft()
+    {
+        return hudLeft;
+    }
+
+    public int getHudBottom()
+    {
+        return hudBottom;
+    }
+
+    public int getHudWidth()
+    {
+        return (int) window.width - (2 * getHudLeft());
+    }
+
+    public int getHudHeight()
+    {
+        return (int) window.height - (2 * getHudBottom());
+    }
+
+    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;
+    }
+}