花了一些时间后，我在LibGDX中实现了多维数据集映射。也许，这不是理想的解决方案，但仅此而已（至少我什么也找不到）。因此，我使用了本机OpenGL
ES函数和LibGDX。我的课程如下：
public class EnvironmentCubemap implements Disposable{protected final Pixmap[] data = new Pixmap[6]; protected ShaderProgram shader;protected int u_worldTrans;protected Mesh quad;private Matrix4 worldTrans;private Quaternion q;protected String vertexShader = " attribute vec3 a_position; n"+ " attribute vec3 a_normal; n"+ " attribute vec2 a_texCoord0; n"+ " uniform mat4 u_worldTrans; n"+ " varying vec2 v_texCoord0; n"+ " varying vec3 v_cubeMapUV; n"+ " void main() { n"+ " v_texCoord0 = a_texCoord0; n"+ " vec4 g_position = u_worldTrans * vec4(a_position, 1.0); n"+ " v_cubeMapUV = normalize(g_position.xyz); n"+ " gl_Position = vec4(a_position, 1.0); n"+ " } n";protected String fragmentShader = "#ifdef GL_ES n"+ " precision mediump float; n"+ " #endif n"+ " uniform samplerCube u_environmentCubemap; n"+ " varying vec2 v_texCoord0; n"+ " varying vec3 v_cubeMapUV; n"+ " void main() { n"+ " gl_FragColor = vec4(textureCube(u_environmentCubemap, v_cubeMapUV).rgb, 1.0); n"+ " } n";public String getDefaultVertexShader(){ return vertexShader;}public String getDefaultFragmentShader(){ return fragmentShader;}public EnvironmentCubemap (Pixmap positiveX, Pixmap negativeX, Pixmap positiveY, Pixmap negativeY, Pixmap positiveZ, Pixmap negativeZ) { data[0]=positiveX; data[1]=negativeX; data[2]=positiveY; data[3]=negativeY; data[4]=positiveZ; data[5]=negativeZ; init(); }public EnvironmentCubemap (FileHandle positiveX, FileHandle negativeX, FileHandle positiveY, FileHandle negativeY, FileHandle positiveZ, FileHandle negativeZ) { this(new Pixmap(positiveX), new Pixmap(negativeX), new Pixmap(positiveY), new Pixmap(negativeY), new Pixmap(positiveZ), new Pixmap(negativeZ));}//IF ALL SIX SIDES ARE REPRESENTED IN ONE IMAGEpublic EnvironmentCubemap (Pixmap cubemap) { int w = cubemap.getWidth(); int h = cubemap.getHeight(); for(int i=0; i<6; i++) data[i] = new Pixmap(w/4, h/3, Format.RGB888); for(int x=0; x<w; x++) for(int y=0; y<h; y++){ //-X if(x>=0 && x<=w/4 && y>=h/3 && y<=h*2/3) data[1].drawPixel(x, y-h/3, cubemap.getPixel(x, y)); //+Y if(x>=w/4 && x<=w/2 && y>=0 && y<=h/3) data[2].drawPixel(x-w/4, y, cubemap.getPixel(x, y)); //+Z if(x>=w/4 && x<=w/2 && y>=h/3 && y<=h*2/3) data[4].drawPixel(x-w/4, y-h/3, cubemap.getPixel(x, y)); //-Y if(x>=w/4 && x<=w/2 && y>=h*2/3 && y<=h) data[3].drawPixel(x-w/4, y-h*2/3, cubemap.getPixel(x, y)); //+X if(x>=w/2 && x<=w*3/4 && y>=h/3 && y<=h*2/3) data[0].drawPixel(x-w/2, y-h/3, cubemap.getPixel(x, y)); //-Z if(x>=w*3/4 && x<=w && y>=h/3 && y<=h*2/3) data[5].drawPixel(x-w*3/4, y-h/3, cubemap.getPixel(x, y)); } cubemap.dispose(); cubemap=null; init(); }private void init(){ shader = new ShaderProgram(vertexShader, fragmentShader); if (!shader.isCompiled()) throw new GdxRuntimeException(shader.getLog()); u_worldTrans = shader.getUniformLocation("u_worldTrans"); quad = createQuad();worldTrans = new Matrix4(); q = new Quaternion(); initCubemap();}private void initCubemap(){ //bind cubemap Gdx.gl20.glBindTexture(GL20.GL_TEXTURE_CUBE_MAP, 0); Gdx.gl20.glTexImage2D(GL20.GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, GL20.GL_RGB, data[0].getWidth(), data[0].getHeight(), 0, GL20.GL_RGB, GL20.GL_UNSIGNED_BYTE, data[0].getPixels()); Gdx.gl20.glTexImage2D(GL20.GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, GL20.GL_RGB, data[1].getWidth(), data[1].getHeight(), 0, GL20.GL_RGB, GL20.GL_UNSIGNED_BYTE, data[1].getPixels()); Gdx.gl20.glTexImage2D(GL20.GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, GL20.GL_RGB, data[2].getWidth(), data[2].getHeight(), 0, GL20.GL_RGB, GL20.GL_UNSIGNED_BYTE, data[2].getPixels()); Gdx.gl20.glTexImage2D(GL20.GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, GL20.GL_RGB, data[3].getWidth(), data[3].getHeight(), 0, GL20.GL_RGB, GL20.GL_UNSIGNED_BYTE, data[3].getPixels()); Gdx.gl20.glTexImage2D(GL20.GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, GL20.GL_RGB, data[4].getWidth(), data[4].getHeight(), 0, GL20.GL_RGB, GL20.GL_UNSIGNED_BYTE, data[4].getPixels()); Gdx.gl20.glTexImage2D(GL20.GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, GL20.GL_RGB, data[5].getWidth(), data[5].getHeight(), 0, GL20.GL_RGB, GL20.GL_UNSIGNED_BYTE, data[5].getPixels()); //Gdx.gl20.glGenerateMipmap(GL20.GL_TEXTURE_CUBE_MAP); //Gdx.gl20.glTexParameteri(GL20.GL_TEXTURE_CUBE_MAP, GL20.GL_TEXTURE_MIN_FILTER, GL20.GL_LINEAR); Gdx.gl20.glTexParameteri ( GL20.GL_TEXTURE_CUBE_MAP, GL20.GL_TEXTURE_MIN_FILTER,GL20.GL_LINEAR_MIPMAP_LINEAR ); Gdx.gl20.glTexParameteri ( GL20.GL_TEXTURE_CUBE_MAP, GL20.GL_TEXTURE_MAG_FILTER,GL20.GL_LINEAR ); Gdx.gl20.glTexParameteri ( GL20.GL_TEXTURE_CUBE_MAP, GL20.GL_TEXTURE_WRAP_S, GL20.GL_CLAMP_TO_EDGE ); Gdx.gl20.glTexParameteri ( GL20.GL_TEXTURE_CUBE_MAP, GL20.GL_TEXTURE_WRAP_T, GL20.GL_CLAMP_TO_EDGE ); Gdx.gl20.glGenerateMipmap(GL20.GL_TEXTURE_CUBE_MAP);}public void render(Camera camera){ //SPECIAL THANKS TO Jos van Egmond camera.view.getRotation( q, true ); q.conjugate(); /////////////////////////////////// worldTrans.idt(); worldTrans.rotate(quaternion); shader.begin(); shader.setUniformMatrix(u_worldTrans, worldTrans.translate(0, 0, -1)); quad.render(shader, GL20.GL_TRIANGLES); shader.end();}public Mesh createQuad(){ Mesh mesh = new Mesh(true, 4, 6, VertexAttribute.Position(), VertexAttribute. ColorUnpacked(), VertexAttribute.TexCoords(0)); mesh.setVertices(new float[] {-1f, -1f, 0, 1, 1, 1, 1, 0, 1, 1f, -1f, 0, 1, 1, 1, 1, 1, 1, 1f, 1f, 0, 1, 1, 1, 1, 1, 0, -1f, 1f, 0, 1, 1, 1, 1, 0, 0}); mesh.setIndices(new short[] {0, 1, 2, 2, 3, 0}); return mesh;}@Overridepublic void dispose() { shader.dispose(); quad.dispose(); for(int i=0; i<6; i++) data[i].dispose();}}如何使用它？只需创建它的实例：
EnvironmentCubemap envCubemap = new EnvironmentCubemap(Gdx.files.internal("cubemap/pos-x.png"), Gdx.files.internal("cubemap/neg-x.png"), Gdx.files.internal("cubemap/pos-y.jpg"), Gdx.files.internal("cubemap/neg-y.jpg"), Gdx.files.internal("cubemap/pos-z.png"), Gdx.files.internal("cubemap/neg-z.png"));要么
EnvironmentCubemap envCubemap = new EnvironmentCubemap(new Pixmap(Gdx.files.internal("cubemap/all_in_one.jpg")));然后使用其
render方法：
envCubemap.render(camera);
希望对别人有帮助！
