我正在尝试使用libgdx来渲染一些fbx模型,并且我已经成功地完成了这一工作,但是我坚持到了这一点.
我在ModelInstance的帮助下渲染一个篮球fbx文件,现在我想在这个篮球上画一个文本.我可以在篮球上画出文字,但是它不是那个篮球的一部分.
我想以与该球相同曲线方式的文字.
这是我如何绘制文字 –
batch = new SpriteBatch();
batch.setProjectionMatrix(camera.combined);
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(3);
BitmapFont aFont = generator.generateFont(parameter);
aFont.getRegion().getTexture().setFilter(Texture.TextureFilter.Linear,Texture.TextureFilter.Linear);
aFont.draw(batch,options.get(i),aBound.getCenterX(),aBound.getCenterY() + textHeight / 2);
其中aBound – >模型的边界框(即BasketBall)
解决方法
您在这里尝试实现的功能在libGdx中稍微复杂一点.然而,您的方法是不正确的,因为您将文本作为单独的精灵对象绘制在球顶部.
实现这一点的正确过程是将文本绘制到纹理上,然后将纹理映射并绑定到球.
程序可分为4部分 –
>设置字体生成和framebuffer对象
>设置精灵批次
>绘制文本,将纹理映射到模型
>渲染模型
作为一个注释,我想提到可以使用任何其他纹理,如果您不想实时更新文本,您可以轻松地使用任何您想要的文本的预制纹理.
代码如下 –
设置字体生成和帧缓冲对象
//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,false);
设置精灵批次
//Set the correct resolution for drawing to the framebuffer lFb.begin(); Gdx.gl.glViewport(0,128); Gdx.gl.glClearColor(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(0,128); 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,8,lMaterial,VertexAttributes.Usage.Position | VertexAttributes.Usage.Normal | VertexAttributes.Usage.TextureCoordinates); //Finally instantiate an object of the model ballInstance = new ModelInstance(ballModel);
渲染模型
mBatch.begin(mCamera); mBatch.render(ballInstance); mBatch.end(); //Rotate the ball along the y-axis ballInstance.transform.rotate(0.0f,0.0f,0.5f);
结果 –
