java - LIBGDX: shaperenderer で塗りつぶされたポリゴンを描画するにはどうすればよいですか?

Question

頂点の配列を使用して形状を定義しました。

float[] points =  new float[]{50,60,50,70,60,70, 60,60,50,60};

そして、私はこれをここに描いています：

shapeRenderer.polygon(floatNew);

これは形状の輪郭を与えるだけです。
色で塗りつぶすにはどうすればよいですか？
ありがとう

Answer 1

現在、ShapeRenderer はポリゴンの描画 (線による) をサポートしていますが、塗りつぶしはサポートしていません。

このコードは、三角形でポリゴンをクリッピングしてから、各三角形を個別に描画します。

ShapeRenderer.java を次のように編集します。

EarClippingTriangulator ear = new EarClippingTriangulator();

public void polygon(float[] vertices, int offset, int count)
{
    if (shapeType != ShapeType.Filled && shapeType != ShapeType.Line)
        throw new GdxRuntimeException("Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
    if (count < 6)
        throw new IllegalArgumentException("Polygons must contain at least 3 points.");
    if (count % 2 != 0)
        throw new IllegalArgumentException("Polygons must have an even number of vertices.");

    check(shapeType, null, count);

    final float firstX = vertices[0];
    final float firstY = vertices[1];
    if (shapeType == ShapeType.Line)
    {
        for (int i = offset, n = offset + count; i < n; i += 2)
        {
            final float x1 = vertices[i];
            final float y1 = vertices[i + 1];

            final float x2;
            final float y2;

            if (i + 2 >= count)
            {
                x2 = firstX;
                y2 = firstY;
            } else
            {
                x2 = vertices[i + 2];
                y2 = vertices[i + 3];
            }

            renderer.color(color);
            renderer.vertex(x1, y1, 0);
            renderer.color(color);
            renderer.vertex(x2, y2, 0);

        }
    } else
    {
        ShortArray arrRes = ear.computeTriangles(vertices);

        for (int i = 0; i < arrRes.size - 2; i = i + 3)
        {
            float x1 = vertices[arrRes.get(i) * 2];
            float y1 = vertices[(arrRes.get(i) * 2) + 1];

            float x2 = vertices[(arrRes.get(i + 1)) * 2];
            float y2 = vertices[(arrRes.get(i + 1) * 2) + 1];

            float x3 = vertices[arrRes.get(i + 2) * 2];
            float y3 = vertices[(arrRes.get(i + 2) * 2) + 1];

            this.triangle(x1, y1, x2, y2, x3, y3);
        }
    }
}

Answer 2

ShapeRenderer.java クラスを編集して、polygon() メソッドを次のコードに置き換えます。

public void polygon(float[] vertices, int offset, int count) {
    if (currType != ShapeType.Filled && currType != ShapeType.Line)
        throw new GdxRuntimeException(
                "Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
    if (count < 6)
        throw new IllegalArgumentException(
                "Polygons must contain at least 3 points.");
    if (count % 2 != 0)
        throw new IllegalArgumentException(
                "Polygons must have an even number of vertices.");

    checkDirty();
    checkFlush(count);

    final float firstX = vertices[0];
    final float firstY = vertices[1];
    if (currType == ShapeType.Line) {
        for (int i = offset, n = offset + count; i < n; i += 2) {
            final float x1 = vertices[i];
            final float y1 = vertices[i + 1];

            final float x2;
            final float y2;

            if (i + 2 >= count) {
                x2 = firstX;
                y2 = firstY;
            } else {
                x2 = vertices[i + 2];
                y2 = vertices[i + 3];
            }

            renderer.color(color);
            renderer.vertex(x1, y1, 0);
            renderer.color(color);
            renderer.vertex(x2, y2, 0);

        }
    } else {

        for (int i = offset, n = offset + count; i < n; i += 4) {

            final float x1 = vertices[i];
            final float y1 = vertices[i + 1];

            if (i + 2 >= count) {
                break;
            }

            final float x2 = vertices[i + 2];
            final float y2 = vertices[i + 3];

            final float x3;
            final float y3;

            if (i + 4 >= count) {
                x3 = firstX;
                y3 = firstY;
            } else {
                x3 = vertices[i + 4];
                y3 = vertices[i + 5];
            }

            renderer.color(color);
            renderer.vertex(x1, y1, 0);
            renderer.color(color);
            renderer.vertex(x2, y2, 0);
            renderer.color(color);
            renderer.vertex(x3, y3, 0);


        }

    }
}

使用法：

    gdx_shape_renderer.begin(ShapeType.Filled);
    gdx_shape_renderer.setColor(fill_r, fill_g, fill_b, fill_a);
    gdx_shape_renderer.polygon(vertices);
    gdx_shape_renderer.end();

    gdx_shape_renderer.begin(ShapeType.Line);
    gdx_shape_renderer.setColor(border_r, border_g, border_b, border_a);
    gdx_shape_renderer.polygon(vertices);
    gdx_shape_renderer.end();