added filled rectangle based on ShapeRenderer approach

drawer/src/space/earlygrey/shapedrawer/FilledPolygonDrawer.java

@@ -1,5 +1,7 @@
 package space.earlygrey.shapedrawer;
 
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
 import com.badlogic.gdx.math.EarClippingTriangulator;
 import com.badlogic.gdx.math.MathUtils;
 import com.badlogic.gdx.utils.ShortArray;
@@ -72,6 +74,56 @@ void rectangle(float x, float y, float width, float height, float rotation, floa
         if (!caching) batchManager.pushToBatch();
     }
 
+    /** Based on {@link ShapeRenderer#rect(float, float, float, float, float, float, float, float, float, Color, Color, Color, Color)} */
+    void rectangle(float x, float y, float originX, float originY, float width, float height, float scaleX, float scaleY,
+                   float degrees, float col1, float col2, float col3, float col4)
+    {
+        boolean caching = batchManager.isCachingDraws();
+        batchManager.ensureSpaceForQuad();
+
+        float cos = MathUtils.cosDeg(degrees);
+        float sin = MathUtils.sinDeg(degrees);
+        float fx = -originX;
+        float fy = -originY;
+        float fx2 = width - originX;
+        float fy2 = height - originY;
+
+        if (scaleX != 1 || scaleY != 1) {
+            fx *= scaleX;
+            fy *= scaleY;
+            fx2 *= scaleX;
+            fy2 *= scaleY;
+        }
+
+        float worldOriginX = x + originX;
+        float worldOriginY = y + originY;
+
+        float x1 = cos * fx - sin * fy + worldOriginX;
+        float y1 = sin * fx + cos * fy + worldOriginY;
+
+        float x2 = cos * fx2 - sin * fy + worldOriginX;
+        float y2 = sin * fx2 + cos * fy + worldOriginY;
+
+        float x3 = cos * fx2 - sin * fy2 + worldOriginX;
+        float y3 = sin * fx2 + cos * fy2 + worldOriginY;
+
+        float x4 = x1 + (x3 - x2);
+        float y4 = y3 - (y2 - y1);
+
+        x1(x1);
+        y1(y1);
+        x2(x2);
+        y2(y2);
+        x3(x3);
+        y3(y3);
+        x4(x4);
+        y4(y4);
+
+        color(col1, col2, col3, col4);
+        batchManager.pushQuad();
+        if (!caching) batchManager.pushToBatch();
+    }
+
     public void triangle(float x1, float y1, float x2, float y2, float x3, float y3, float color1, float color2, float color3) {
         boolean caching = batchManager.isCachingDraws();
         vert1(x1, y1);

drawer/src/space/earlygrey/shapedrawer/ShapeDrawer.java

@@ -4,6 +4,7 @@
 import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.g2d.Batch;
 import com.badlogic.gdx.graphics.g2d.TextureRegion;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
 import com.badlogic.gdx.math.MathUtils;
 import com.badlogic.gdx.math.Polygon;
 import com.badlogic.gdx.math.Rectangle;
@@ -1844,4 +1845,49 @@ public void filledRectangle(float x, float y, float width, float height, float r
         filledPolygonDrawer.rectangle(x, y, width, height, rotation, c1, c2, c3, c4);
     }
 
+    /** Draws a filled rectangle. The x and y specify the lower left corner.
+     * The originX and originY specify the point about which to rotate the rectangle.
+     * The rotation is specified in degrees.
+     *
+     * @apiNote It have the same usage as {@link ShapeRenderer#rect(float, float, float, float, float, float, float, float, float)} has
+     */
+    public void filledRectangle2(float x, float y, float originX, float originY, float width, float height, float scaleX, float scaleY, float degrees)
+    {
+        float c = batchManager.floatBits;
+        filledRectangle2(x, y, originX, originY, width, height, scaleX, scaleY, degrees, c, c, c, c);
+    }
+
+    /** Draws a filled rectangle. The x and y specify the lower left corner.
+     * The originX and originY specify the point about which to rotate the rectangle.
+     * The rotation is specified in degrees.
+     *
+     * @param col1 The color at (x, y)
+     * @param col2 The color at (x + width, y)
+     * @param col3 The color at (x + width, y + height)
+     * @param col4 The color at (x, y + height)
+     *
+     * @apiNote It have the same usage as {@link ShapeRenderer#rect(float, float, float, float, float, float, float, float, float, Color, Color, Color, Color)} has
+     */
+    public void filledRectangle2(float x, float y, float originX, float originY, float width, float height, float scaleX, float scaleY,
+                                 float degrees, Color col1, Color col2, Color col3, Color col4)
+    {
+        filledRectangle2(x, y, originX, originY, width, height, scaleX, scaleY, degrees, col1.toFloatBits(), col2.toFloatBits(), col3.toFloatBits(), col4.toFloatBits());
+    }
+
+    /** Draws a filled rectangle. The x and y specify the lower left corner.
+     * The originX and originY specify the point about which to rotate the rectangle.
+     * The rotation is specified in degrees.
+     *
+     * @param col1 The color at (x, y)
+     * @param col2 The color at (x + width, y)
+     * @param col3 The color at (x + width, y + height)
+     * @param col4 The color at (x, y + height)
+     *
+     * @apiNote It have the same usage as {@link ShapeRenderer#rect(float, float, float, float, float, float, float, float, float, Color, Color, Color, Color)} has, but uses {@link Color#toFloatBits()}'ed colors to draw
+     */
+    public void filledRectangle2(float x, float y, float originX, float originY, float width, float height, float scaleX, float scaleY,
+                                 float degrees, float col1, float col2, float col3, float col4)
+    {
+        filledPolygonDrawer.rectangle(x, y, originX, originY, width, height, scaleX, scaleY, degrees, col1, col2, col3, col4);
+    }
 }