Android 在libgdx中在球体上绘制文本

我正在尝试libgdx来渲染一些fbx模型，我成功地做到了这一点，但我在某一点上被卡住了

我在ModelInstance的帮助下渲染篮球fbx文件，现在我想在篮球上绘制一个文本。我能在篮球上画文字，但它是线性的，看起来不是篮球的一部分。 我想要文本以与球相同的曲线方式

这就是我画文本的方式--

---

Where Ab富饶-->模型的边界框（即篮球）

在libGdx中，您试图实现的目标有点复杂。但是，您的方法是不正确的，因为您正在将文本作为单独的精灵对象绘制在球的顶部

实现这一点的正确步骤是将文本绘制到纹理上，然后将纹理映射并绑定到球

该程序可分为4个部分：

设置字体生成和帧缓冲区对象

设置sprite批处理

绘制文本，将纹理映射到模型

渲染模型

作为说明，我想提到的是，可以使用任何其他纹理，如果您不想实时更新文本，您可以轻松地使用预先制作的纹理来处理您想要的任何文本

代码如下-

设置字体生成和帧缓冲区对象

//Create a new SpriteBatch object
batch = new SpriteBatch();

//Generate font
FreeTypeFontGenerator generator = new 
FreeTypeFontGenerator(Gdx.files.internal("font/Lato-Bold.ttf"));
FreeTypeFontGenerator.FreeTypeFontParameter parameter = new 
FreeTypeFontGenerator.FreeTypeFontParameter();
parameter.size = 30;
parameter.color = com.badlogic.gdx.graphics.Color.WHITE;
parameter.magFilter = Texture.TextureFilter.Linear; // used for resizing quality
parameter.minFilter = Texture.TextureFilter.Linear;
generator.scaleForPixelHeight(10);

//Get bitmap font
BitmapFont aFont = generator.generateFont(parameter);
aFont.getRegion().getTexture().setFilter(Texture.TextureFilter.Linear, 
Texture.TextureFilter.Linear);

//Generate new framebuffer object of 128x128 px. This will be our texture
FrameBuffer lFb = new FrameBuffer(Pixmap.Format.RGBA4444,128,128,false);

设置雪碧批次

//Set the correct resolution for drawing to the framebuffer
lFb.begin();
Gdx.gl.glViewport(0,0,128,128);
Gdx.gl.glClearColor(1f, 1f, 1f, 1);

Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
Matrix4 lm = new Matrix4();
//Set the correct projection for the sprite batch
lm.setToOrtho2D(0,0,128,128);
batch.setProjectionMatrix(lm);

最后将文本绘制到纹理上

batch.begin();
aFont.draw(batch,"Goal!",64,64);
batch.end();
lFb.end();

将纹理映射到模型

//Generate the material to be applied to the ball
//Notice here how we use the FBO's texture as the material base
Material lMaterial = new Material(TextureAttribute.createDiffuse(lFb.getColorBufferTexture()));

//Since I do not have a sphere model, I'll just create one with the newly 
//generated material        
ballModel = mb.createSphere(1.0f,1.0f,1.0f,8,8,lMaterial,
 VertexAttributes.Usage.Position | VertexAttributes.Usage.Normal | VertexAttributes.Usage.TextureCoordinates);

//Finally instantiate an object of the model 
ballInstance = new ModelInstance(ballModel);

mBatch.begin(mCamera);
mBatch.render(ballInstance);
mBatch.end();
//Rotate the ball along the y-axis
ballInstance.transform.rotate(0.0f,1.0f,0.0f,0.5f);

渲染模型

//Generate the material to be applied to the ball
//Notice here how we use the FBO's texture as the material base
Material lMaterial = new Material(TextureAttribute.createDiffuse(lFb.getColorBufferTexture()));

//Since I do not have a sphere model, I'll just create one with the newly 
//generated material        
ballModel = mb.createSphere(1.0f,1.0f,1.0f,8,8,lMaterial,
 VertexAttributes.Usage.Position | VertexAttributes.Usage.Normal | VertexAttributes.Usage.TextureCoordinates);

//Finally instantiate an object of the model 
ballInstance = new ModelInstance(ballModel);

mBatch.begin(mCamera);
mBatch.render(ballInstance);
mBatch.end();
//Rotate the ball along the y-axis
ballInstance.transform.rotate(0.0f,1.0f,0.0f,0.5f);

结果-

---

您正在将文本作为一个单独的实体绘制在同一矩阵上。实现这一点的一种方法是在用于篮球等的纹理位图上绘制文本。它将采用球形。