Question

我正在使用libGDX开发3D引擎。我正在制作一个外部工具来创建地图，并且设法使墙变了纹理。现在，我正在尝试制作天花板和地板。要创建它们的形状，我使用EarClipping创建构成形状的三角形。如您所见，它几乎可以正常工作：

形状是完美的，但是没有将材料应用到天花板上-它只是一种灰色。为此，我使用了MeshBuilder（用于墙壁和三角形的矩形构成了天花板的形状）。这是负责创建该网格的代码：

ModelBuilder modelBuilder = new ModelBuilder();
    MeshPartBuilder meshBuilder;
    Vector3 corner00 = new Vector3(),
            corner10 = new Vector3(),
            corner11 = new Vector3(),
            corner01 = new Vector3(),
            normal = new Vector3();

    modelBuilder.begin();

    Texture wallTexture = new Texture("wall.PNG");
    wallTexture.setWrap(Texture.TextureWrap.Repeat, Texture.TextureWrap.Repeat);
    wallTexture.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear);
    Material material = new Material(TextureAttribute.createDiffuse(wallTexture));
    EarClippingTriangulator triangulator = new EarClippingTriangulator();


    Array<Sector> sectors = level.getSectors();
    for (Sector sector : sectors) {
        meshBuilder = modelBuilder.part("room1", GL20.GL_TRIANGLES,
                VertexAttributes.Usage.Position | VertexAttributes.Usage.Normal |
                        VertexAttributes.Usage.TextureCoordinates, material);
        Array<Wall> walls = sector.getWalls();
        for (Wall wall : walls) {
            Vertex v1 = wall.getV1();
            Vertex v2 = wall.getV2();
            meshBuilder.setUVRange(0, 0, (Vector2.dst(v1.getX(), v1.getY(), v2.getX(), v2.getY())) / wallTexture.getWidth(), 1);
            meshBuilder.rect(corner00.set(v1.getX() / PROP, v1.getY() / PROP, 0), corner10.set(v2.getX() / PROP, v2.getY() / PROP, 0),
                    corner11.set(v2.getX() / PROP, v2.getY() / PROP, 10), corner01.set(v1.getX() / PROP, v1.getY() / PROP, 10),
                    normal.set(wall.getNormal(), 0));
        }
        meshBuilder = modelBuilder.part("ceil", GL20.GL_TRIANGLES,
                VertexAttributes.Usage.Position | VertexAttributes.Usage.Normal |
                        VertexAttributes.Usage.TextureCoordinates, material);



        Array<Vertex> sectorVertices = sector.getVertices();
        float[] sectorVerticesToTri = new float[sectorVertices.size * 2];
        for (int i = 0; i < sectorVertices.size; i++) {
            Vertex vertex = sectorVertices.get(i);
            int currentTriIndex = i * 2;
            sectorVerticesToTri[currentTriIndex] = vertex.getX();
            sectorVerticesToTri[currentTriIndex + 1] = vertex.getY();
        }
        ShortArray triangles = triangulator.computeTriangles(sectorVerticesToTri);
        for (int i = 0; i < triangles.size / 3; i++) {
            int currentTriangleIndex = i * 3;
            Vertex v1 = sectorVertices.get(triangles.get(currentTriangleIndex));
            Vertex v2 = sectorVertices.get(triangles.get(currentTriangleIndex + 1));
            Vertex v3 = sectorVertices.get(triangles.get(currentTriangleIndex + 2));

            //Why these triangles don't show the texture?
            meshBuilder.triangle(
                    corner00.set(v1.getX() / PROP, v1.getY() / PROP, 10),
                    corner01.set(v2.getX() / PROP, v2.getY() / PROP, 10),
                    corner10.set(v3.getX() / PROP, v3.getY() / PROP, 10));
        }
    }
    Model worldModel = modelBuilder.end();
    instance = new ModelInstance(worldModel);

如您所见，这段代码创建了三角形：

meshBuilder.triangle(
                    corner00.set(v1.getX() / PROP, v1.getY() / PROP, 10),
                    corner01.set(v2.getX() / PROP, v2.getY() / PROP, 10),
                    corner10.set(v3.getX() / PROP, v3.getY() / PROP, 10));

PROP只是一个常数，以使其适合地图工具的比例。

我不知道为什么它不能与rects一起工作。还有一件事，即使三角形确实显示了纹理，也将每个三角形单独显示一个。有没有办法将纹理包裹在由三角形创建的整个形状上？

谢谢

使用libGDX

0 个答案: