OpenGLES 'vertex attribute index out of boundary'错误，尽管渲染工作正常

Question

在OpenGLES 2.0/JAVA中：

我最近从使用顶点数组渲染切换到使用顶点和索引缓冲区渲染。

在绘制对象(表格(时，我仍然收到错误消息。(仅在模拟器上，而不是在真实手机上(

这是我绘制对象的方式：

public class IndexedTable {
private static final int POSITION_COMPONENT_COUNT = 3;
private static final int TEXTURE_COORDINATES_COMPONENT_COUNT = 2;
private static final int POSITION_STRIDE = (POSITION_COMPONENT_COUNT) * BYTES_PER_FLOAT;
private static final int TEXTURE_STRIDE = (TEXTURE_COORDINATES_COMPONENT_COUNT) * BYTES_PER_FLOAT;
private int textureID;
private Point position;
private float width;
private float height;
private float[] vertexData;
private float[] textureData;
private short[] indexData;
private final VertexBuffer vertexBuffer;
private final VertexBuffer textureBuffer;
private final IndexBuffer indexBuffer;
public IndexedTable(Point position, float width, float height, int textureID) {
vertexData = new float[]{
// Order of COORDINATES: X, Y, Z, S, T
// Indexed Square = 4 vertices mapped by 6 indices
-(width/2), 0f, -(height/2),    //index 0
-(width/2), 0f, (height/2),     //index 1
(width/2), 0f,  (height/2),     //index 2
(width/2), 0f,  -(height/2)    //index 3
};
textureData = new float[] {
0f, 0.1f,
0f, 0.9f,
1f, 0.9f,
1f, 0.1f
};
indexData = new short[]{
// First triangle
0, 1, 3,
// Second triangle
3, 1, 2
};
this.textureID = textureID;
this.position = position;
this.width = width;
this.height = height;
vertexBuffer = new VertexBuffer(vertexData);
textureBuffer = new VertexBuffer(textureData);
indexBuffer = new IndexBuffer(indexData);
}
public void bindData(TextureShaderProgram textureShaderProgram) {
vertexBuffer.setVertexAttribPointer(0, textureShaderProgram.getPositionAttributeLocation(), POSITION_COMPONENT_COUNT, POSITION_STRIDE);
textureBuffer.setVertexAttribPointer(0, textureShaderProgram.getTextureCoordinatesAttributeLocation(), TEXTURE_COORDINATES_COMPONENT_COUNT, TEXTURE_STRIDE);
}
public void draw(TextureShaderProgram textureShaderProgram, float[] viewProjectionMatrix) {
textureShaderProgram.useProgram();
textureShaderProgram.setUniforms(viewProjectionMatrix, MatrixHelper.createTransformationMatrix(new Vector(position.x, position.y, position.z), new Vector(1,1,1)), textureID);
bindData(textureShaderProgram);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer.getBufferID());
glDrawElements(GL_TRIANGLES, indexData.length, GL_UNSIGNED_SHORT, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}

我做错了什么吗？

这是我得到的错误(比如每秒 500 次(：

2020-05-19 17：50：33.253 7995-8054/com.example.andreas.firstopenglproject E/emuglGLESv2_enc：检测到边界外的顶点属性索引。跳过相应的顶点属性。buf=0xbfca10f0 2020-05-19 17：50：33.253 7995-8054/com.example.andreas.firstopenglproject E/emuglGLESv2_enc：越界顶点属性信息：clientArray？1 属性 1 vbo 5 分配缓冲区大小 32 缓冲区数据指定？1 通缉开始 272 通缉结束 800

我试图在一个顶点数组中使用顶点数据和纹理数据渲染相同的内容，但纹理永远不会正确呈现。(我在Khronus-OpenGL论坛上问过这个问题：https://community.khronos.org/t/weird-texture-behaviour-after-switching-from-vertexarray-to-vertexbuffer-indexbuffer/105776(

Answer 1

这对我有用。

变量声明：

protected final byte INT_SIZE = 4; // number of bytes for integer type
private final byte FLOAT_SIZE = 4; // number of bytes for float type
// the number of array elements per vertex (x, y, z)
protected final byte VERTEX_COMPONENT = 3;
// the number of array elements per texture coordinate (u, v)
protected final byte TEXTURE_COMPONENT = 2;
// step for the vertex: the number of bytes per float type multiplied 
// by the number of array elements for the vertex (x, y, z)
protected final byte VERTEX_STRIDE = FLOAT_SIZE * VERTEX_COMPONENT;
// step for texture coordinate: number of bytes per float type multiplied by 
// the number of array elements for texture coordinate (u, v)
protected final byte TEXTURE_STRIDE = FLOAT_SIZE * TEXTURE_COMPONENT;
protected final int NUMBER_VERTICES; // number of vertices
protected final int NUMBERS_TEXTURES; // number of texture coordinates
protected final int NUMBER_INDICES; // number of indices
protected FloatBuffer bufferVertices;
protected FloatBuffer bufferTextureCoordinates;
protected IntBuffer bufferIndices;

初始化：

float[] vertices = modelData.getVertices(); // all vertices of 3D-object
bufferVertices = floatBuffer(vertices);
NUMBER_VERTICES = vertices.length / VERTEX_COMPONENT;
int[] indices = modelData.getIndices(); // all indices of 3D-object
bufferIndices = intBuffer(indices);
NUMBER_INDICES = indices.length;
float[] textureCoordinates = modelData.getTextureCoordinates(); // all UV
bufferTextureCoordinates = floatBuffer(textureCoordinates);
NUMBERS_TEXTURES = textureCoordinates.length / TEXTURE_COMPONENT;

创建 VBO：

private final int[] VBO = new int[3];
...
VBO[0] = 0;
VBO[1] = 0;
VBO[2] = 0;
GLES20.glGenBuffers(3, VBO, 0);
bufferVertices.position(0);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, VBO[0]);
GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, VERTEX_STRIDE * NUMBER_VERTICES,
bufferVertices, GLES20.GL_STATIC_DRAW);
bufferTextureCoordinates.position(0);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, VBO[1]);
GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, TEXTURE_STRIDE * NUMBERS_TEXTURES,
bufferTextureCoordinates, GLES20.GL_STATIC_DRAW);
bufferIndices.position(0);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, VBO[2]);
GLES20.glBufferData(GLES20.GL_ELEMENT_ARRAY_BUFFER, INT_SIZE * NUMBER_INDICES,
bufferIndices, GLES20.GL_STATIC_DRAW);

画：

...
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, VBO[0]);
GLES20.glVertexAttribPointer(positionLink, VERTEX_COMPONENT, GLES20.GL_FLOAT,
false, VERTEX_STRIDE, 0);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);
...
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, VBO[1]);
GLES20.glVertexAttribPointer(textureCoordinatesLink, TEXTURE_COMPONENT, GLES20.GL_FLOAT,
false, TEXTURE_STRIDE, 0);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);
...
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, VBO[2]);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, NUMBER_INDICES, GLES20.GL_UNSIGNED_INT, 0);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, 0);
...